TY  - JOUR
AU  - Krstić, Jelena
AU  - Spasojević, Jelena P.
AU  - Radosavljević, Aleksandra
AU  - Šiljegović, Milorad
AU  - Kačarević-Popović, Zorica M.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5849
AB  - In this study, the potential of chitosan/poly(vinyl alcohol) (CS/PVA) blends as capping agent for stabilization of Ag-nanoparticles (Ag NPs) during their in situ gamma irradiation induced synthesis was investigated. The UV-vis absorption spectra show the surface plasmon absorption band around 410 nm, which confirms the formation of Ag-nanoparticles. It was found that the composition of CS/PVA blend affected the size of the obtained Ag-nanoparticles, as well as the parameters such as density, molar concentration and effective surface area, calculated from the experimentally obtained UV-vis absorption spectra and spectra obtained by simulation according to the Mie theory. SEM micrograph and XRD measurement indicated a spherical morphology and face centered cubic crystal structure of Ag-nanoparticles, with diameter around 12 nm. The values of optical band gap energy between valence and conduction bands (E-g), calculated from the UV-vis absorption spectra, also show dependence on the blend composition for Ag-CS/PVA colloids as well as for Ag-CS/PVA nanocomposites. (C) 2013 Elsevier Ltd. All rights reserved.
T2  - Radiation Physics and Chemistry
T1  - Optical and structural properties of radiolytically in situ synthesized silver nanoparticles stabilized by chitosan/poly(vinyl alcohol) blends
VL  - 96
SP  - 158
EP  - 166
DO  - 10.1016/j.radphyschem.2013.09.013
ER  - 

@article{
author = "Krstić, Jelena and Spasojević, Jelena P. and Radosavljević, Aleksandra and Šiljegović, Milorad and Kačarević-Popović, Zorica M.",
year = "2014",
abstract = "In this study, the potential of chitosan/poly(vinyl alcohol) (CS/PVA) blends as capping agent for stabilization of Ag-nanoparticles (Ag NPs) during their in situ gamma irradiation induced synthesis was investigated. The UV-vis absorption spectra show the surface plasmon absorption band around 410 nm, which confirms the formation of Ag-nanoparticles. It was found that the composition of CS/PVA blend affected the size of the obtained Ag-nanoparticles, as well as the parameters such as density, molar concentration and effective surface area, calculated from the experimentally obtained UV-vis absorption spectra and spectra obtained by simulation according to the Mie theory. SEM micrograph and XRD measurement indicated a spherical morphology and face centered cubic crystal structure of Ag-nanoparticles, with diameter around 12 nm. The values of optical band gap energy between valence and conduction bands (E-g), calculated from the UV-vis absorption spectra, also show dependence on the blend composition for Ag-CS/PVA colloids as well as for Ag-CS/PVA nanocomposites. (C) 2013 Elsevier Ltd. All rights reserved.",
journal = "Radiation Physics and Chemistry",
title = "Optical and structural properties of radiolytically in situ synthesized silver nanoparticles stabilized by chitosan/poly(vinyl alcohol) blends",
volume = "96",
pages = "158-166",
doi = "10.1016/j.radphyschem.2013.09.013"
}

Krstić, J., Spasojević, J. P., Radosavljević, A., Šiljegović, M.,& Kačarević-Popović, Z. M.. (2014). Optical and structural properties of radiolytically in situ synthesized silver nanoparticles stabilized by chitosan/poly(vinyl alcohol) blends. in Radiation Physics and Chemistry, 96, 158-166.
https://doi.org/10.1016/j.radphyschem.2013.09.013

Krstić J, Spasojević JP, Radosavljević A, Šiljegović M, Kačarević-Popović ZM. Optical and structural properties of radiolytically in situ synthesized silver nanoparticles stabilized by chitosan/poly(vinyl alcohol) blends. in Radiation Physics and Chemistry. 2014;96:158-166.
doi:10.1016/j.radphyschem.2013.09.013 .

Krstić, Jelena, Spasojević, Jelena P., Radosavljević, Aleksandra, Šiljegović, Milorad, Kačarević-Popović, Zorica M., "Optical and structural properties of radiolytically in situ synthesized silver nanoparticles stabilized by chitosan/poly(vinyl alcohol) blends" in Radiation Physics and Chemistry, 96 (2014):158-166,
https://doi.org/10.1016/j.radphyschem.2013.09.013 . .

TY  - JOUR
AU  - Šiljegović, Milorad
AU  - Kačarević-Popović, Zorica M.
AU  - Stchakovsky, M.
AU  - Radosavljević, Aleksandra
AU  - Korica, Sanja
AU  - Novaković, Mirjana M.
AU  - Popović, Maja
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5943
AB  - The optical properties of 150 keV N+ implanted ethylene-norbornene (TOPAS 6017S-04) copolymer were investigated using phase modulated spectroscopic ellipsometry (PMSE) and ultraviolet-visible (UV-Vis) spectroscopy in the ranges of 0.6-6.5 eV and of 1.5-6.2 eV, respectively. The single-effectiveoscillator model was used to fit the calculated data to the experimental ellipsometric spectra. The results show that the oscillator and dispersion energies decrease with increasing ion fluence up to 10(15) cm(-2), and then these parameters increase with further fluence increasing. Analysis of the UV-Vis absorption spectra revealed the presence of indirect electronic transitions with the band gap energy in the range of 1.3 to 2.8 eV. It was found that both the band gap energy and the energy width of the distribution of localized band tail states decrease, while the values of Tauc coefficient increase with increasing the ion fluence. From the ellipsometric data we found that the real part of the dielectric function increased about 7% after irradiation with 10(15) cm(-2), and decreased about 10% in samples modified with 10(16) cm(-2).
T2  - Radiation Physics and Chemistry
T1  - Spectroscopic ellipsometry study of N+ ion-implanted ethylene-norbornene films
VL  - 98
SP  - 7
EP  - 13
DO  - 10.1016/j.radphyschem.2013.12.023
ER  - 

@article{
author = "Šiljegović, Milorad and Kačarević-Popović, Zorica M. and Stchakovsky, M. and Radosavljević, Aleksandra and Korica, Sanja and Novaković, Mirjana M. and Popović, Maja",
year = "2014",
abstract = "The optical properties of 150 keV N+ implanted ethylene-norbornene (TOPAS 6017S-04) copolymer were investigated using phase modulated spectroscopic ellipsometry (PMSE) and ultraviolet-visible (UV-Vis) spectroscopy in the ranges of 0.6-6.5 eV and of 1.5-6.2 eV, respectively. The single-effectiveoscillator model was used to fit the calculated data to the experimental ellipsometric spectra. The results show that the oscillator and dispersion energies decrease with increasing ion fluence up to 10(15) cm(-2), and then these parameters increase with further fluence increasing. Analysis of the UV-Vis absorption spectra revealed the presence of indirect electronic transitions with the band gap energy in the range of 1.3 to 2.8 eV. It was found that both the band gap energy and the energy width of the distribution of localized band tail states decrease, while the values of Tauc coefficient increase with increasing the ion fluence. From the ellipsometric data we found that the real part of the dielectric function increased about 7% after irradiation with 10(15) cm(-2), and decreased about 10% in samples modified with 10(16) cm(-2).",
journal = "Radiation Physics and Chemistry",
title = "Spectroscopic ellipsometry study of N+ ion-implanted ethylene-norbornene films",
volume = "98",
pages = "7-13",
doi = "10.1016/j.radphyschem.2013.12.023"
}

Šiljegović, M., Kačarević-Popović, Z. M., Stchakovsky, M., Radosavljević, A., Korica, S., Novaković, M. M.,& Popović, M.. (2014). Spectroscopic ellipsometry study of N+ ion-implanted ethylene-norbornene films. in Radiation Physics and Chemistry, 98, 7-13.
https://doi.org/10.1016/j.radphyschem.2013.12.023

Šiljegović M, Kačarević-Popović ZM, Stchakovsky M, Radosavljević A, Korica S, Novaković MM, Popović M. Spectroscopic ellipsometry study of N+ ion-implanted ethylene-norbornene films. in Radiation Physics and Chemistry. 2014;98:7-13.
doi:10.1016/j.radphyschem.2013.12.023 .

Šiljegović, Milorad, Kačarević-Popović, Zorica M., Stchakovsky, M., Radosavljević, Aleksandra, Korica, Sanja, Novaković, Mirjana M., Popović, Maja, "Spectroscopic ellipsometry study of N+ ion-implanted ethylene-norbornene films" in Radiation Physics and Chemistry, 98 (2014):7-13,
https://doi.org/10.1016/j.radphyschem.2013.12.023 . .

TY  - JOUR
AU  - Popović, Maja
AU  - Novaković, Mirjana M.
AU  - Šiljegović, Milorad
AU  - Bibić, Nataša M.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6957
AB  - This paper reports on a study of microstructrual changes in TiN/Si bilayers due to 200 key Ar+ ions irradiation at room temperature. The 240 nm TiN/Si bilayers were prepared by d.c. reactive sputtering on crystalline Si (100) substrates. The TiN films were deposited at the substrate temperature of 150 degrees C. After deposition the TiN/Si bilayers were irradiated to the fluences of 5 x 10(15) and 2 x 10(16) ions/cm(2). The structural changes induced by ion irradiation in the TiN/Si bilayers were analyzed by Rutherford Backscattering Spectroscopy (RBS), X-ray diffraction analyses (XRD) and Transmission Electron Microscopy (TEM). The irradiations caused the microstructrual changes in TiN layers, but no amorphization even at the highest argon fluence of 2 x 10(16) ions/cm(2). It is also observed that the mean crystallite size decreases with the increasing ion fluence. (C) 2011 Elsevier B.V. All rights reserved.
T2  - Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
T1  - Effects of 200 keV argon ions irradiation on microstructural properties of titanium nitride films
VL  - 279
SP  - 144
EP  - 146
DO  - 10.1016/j.nimb.2011.10.033
ER  - 

@article{
author = "Popović, Maja and Novaković, Mirjana M. and Šiljegović, Milorad and Bibić, Nataša M.",
year = "2012",
abstract = "This paper reports on a study of microstructrual changes in TiN/Si bilayers due to 200 key Ar+ ions irradiation at room temperature. The 240 nm TiN/Si bilayers were prepared by d.c. reactive sputtering on crystalline Si (100) substrates. The TiN films were deposited at the substrate temperature of 150 degrees C. After deposition the TiN/Si bilayers were irradiated to the fluences of 5 x 10(15) and 2 x 10(16) ions/cm(2). The structural changes induced by ion irradiation in the TiN/Si bilayers were analyzed by Rutherford Backscattering Spectroscopy (RBS), X-ray diffraction analyses (XRD) and Transmission Electron Microscopy (TEM). The irradiations caused the microstructrual changes in TiN layers, but no amorphization even at the highest argon fluence of 2 x 10(16) ions/cm(2). It is also observed that the mean crystallite size decreases with the increasing ion fluence. (C) 2011 Elsevier B.V. All rights reserved.",
journal = "Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms",
title = "Effects of 200 keV argon ions irradiation on microstructural properties of titanium nitride films",
volume = "279",
pages = "144-146",
doi = "10.1016/j.nimb.2011.10.033"
}

Popović, M., Novaković, M. M., Šiljegović, M.,& Bibić, N. M.. (2012). Effects of 200 keV argon ions irradiation on microstructural properties of titanium nitride films. in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 279, 144-146.
https://doi.org/10.1016/j.nimb.2011.10.033

Popović M, Novaković MM, Šiljegović M, Bibić NM. Effects of 200 keV argon ions irradiation on microstructural properties of titanium nitride films. in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms. 2012;279:144-146.
doi:10.1016/j.nimb.2011.10.033 .

Popović, Maja, Novaković, Mirjana M., Šiljegović, Milorad, Bibić, Nataša M., "Effects of 200 keV argon ions irradiation on microstructural properties of titanium nitride films" in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 279 (2012):144-146,
https://doi.org/10.1016/j.nimb.2011.10.033 . .

TY  - JOUR
AU  - Jovanović, Željka
AU  - Radosavljević, Aleksandra
AU  - Šiljegović, Milorad
AU  - Bibić, Nataša M.
AU  - Mišković-Stanković, Vesna B.
AU  - Kačarević-Popović, Zorica M.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5022
AB  - Silver nanoparticles (AgNPs) were synthesized in situ by gamma-irradiation using poly(N-vinyl-2-pyrrolidone) (PVP) as a capping agent. The concentration, molecular weight and the structure (crosslinked and interpenetrated network) of PVP were varied, in order to determine the influence of the capping agent in the radiolytic synthesis of the Ag/PVP nanosystems. Transmission electron microscopy (TEM) showed that AgNPs obtained from the solutions containing higher PVP concentration and higher molecular weight were spherical in shape, with narrow size distribution and a diameter of similar to 6 nm, while slightly larger rod-shaped silver agglomerates, with bimodal nanoparticle size distribution and diameters of similar to 10 nm and similar to 20 nm were obtained from the solutions containing lower PVP concentration and lower molecular weight. Strong plasmon coupling and extending of plasmon resonance was observed by UV-vis spectroscopy, as a result of formation of nanorod-like agglomerates. Crosslinked and interpenetrated network did not affect the structure of synthesized AgNPs. Ag/PVP nanocomposite, in the form of thin film, was obtained by solvent evaporation from Ag/PVP colloid solution with 10 wt% of PVP, and characterized by FTIR spectroscopy. The interactions in Ag/PVP nanocomposite are shown to be the result of the coordination bonding between AgNPs and nitrogen from pyrrolidone ring of PVP. The optical properties of investigated Ag/PVP nanosystems, as measured by the values of optical band gap, E-g, are mainly the consequence of the interparticle distance as a result of the concentration and the structure of surrounding PVP macromolecules. (C) 2012 Elsevier Ltd. All rights reserved.
T2  - Radiation Physics and Chemistry
T1  - Structural and optical characteristics of silver/poly(N-vinyl-2-pyrrolidone) nanosystems synthesized by gamma-irradiation
VL  - 81
IS  - 11
SP  - 1720
EP  - 1728
DO  - 10.1016/j.radphyschem.2012.05.019
ER  - 

@article{
author = "Jovanović, Željka and Radosavljević, Aleksandra and Šiljegović, Milorad and Bibić, Nataša M. and Mišković-Stanković, Vesna B. and Kačarević-Popović, Zorica M.",
year = "2012",
abstract = "Silver nanoparticles (AgNPs) were synthesized in situ by gamma-irradiation using poly(N-vinyl-2-pyrrolidone) (PVP) as a capping agent. The concentration, molecular weight and the structure (crosslinked and interpenetrated network) of PVP were varied, in order to determine the influence of the capping agent in the radiolytic synthesis of the Ag/PVP nanosystems. Transmission electron microscopy (TEM) showed that AgNPs obtained from the solutions containing higher PVP concentration and higher molecular weight were spherical in shape, with narrow size distribution and a diameter of similar to 6 nm, while slightly larger rod-shaped silver agglomerates, with bimodal nanoparticle size distribution and diameters of similar to 10 nm and similar to 20 nm were obtained from the solutions containing lower PVP concentration and lower molecular weight. Strong plasmon coupling and extending of plasmon resonance was observed by UV-vis spectroscopy, as a result of formation of nanorod-like agglomerates. Crosslinked and interpenetrated network did not affect the structure of synthesized AgNPs. Ag/PVP nanocomposite, in the form of thin film, was obtained by solvent evaporation from Ag/PVP colloid solution with 10 wt% of PVP, and characterized by FTIR spectroscopy. The interactions in Ag/PVP nanocomposite are shown to be the result of the coordination bonding between AgNPs and nitrogen from pyrrolidone ring of PVP. The optical properties of investigated Ag/PVP nanosystems, as measured by the values of optical band gap, E-g, are mainly the consequence of the interparticle distance as a result of the concentration and the structure of surrounding PVP macromolecules. (C) 2012 Elsevier Ltd. All rights reserved.",
journal = "Radiation Physics and Chemistry",
title = "Structural and optical characteristics of silver/poly(N-vinyl-2-pyrrolidone) nanosystems synthesized by gamma-irradiation",
volume = "81",
number = "11",
pages = "1720-1728",
doi = "10.1016/j.radphyschem.2012.05.019"
}

Jovanović, Ž., Radosavljević, A., Šiljegović, M., Bibić, N. M., Mišković-Stanković, V. B.,& Kačarević-Popović, Z. M.. (2012). Structural and optical characteristics of silver/poly(N-vinyl-2-pyrrolidone) nanosystems synthesized by gamma-irradiation. in Radiation Physics and Chemistry, 81(11), 1720-1728.
https://doi.org/10.1016/j.radphyschem.2012.05.019

Jovanović Ž, Radosavljević A, Šiljegović M, Bibić NM, Mišković-Stanković VB, Kačarević-Popović ZM. Structural and optical characteristics of silver/poly(N-vinyl-2-pyrrolidone) nanosystems synthesized by gamma-irradiation. in Radiation Physics and Chemistry. 2012;81(11):1720-1728.
doi:10.1016/j.radphyschem.2012.05.019 .

Jovanović, Željka, Radosavljević, Aleksandra, Šiljegović, Milorad, Bibić, Nataša M., Mišković-Stanković, Vesna B., Kačarević-Popović, Zorica M., "Structural and optical characteristics of silver/poly(N-vinyl-2-pyrrolidone) nanosystems synthesized by gamma-irradiation" in Radiation Physics and Chemistry, 81, no. 11 (2012):1720-1728,
https://doi.org/10.1016/j.radphyschem.2012.05.019 . .

TY  - JOUR
AU  - Šiljegović, Milorad
AU  - Kačarević-Popović, Zorica M.
AU  - Krklješ, Aleksandra N.
AU  - Stojanović, Zoran A.
AU  - Jovanović, Zoran M.
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4263
AB  - Ion bombardment is a suitable tool to modify the optical properties of polymers. In the present study the effect of ion bombardment on the optical absorption of ethylene-norbornene copolymer (TOPAS) was studied using ultraviolet-visible (UV-Vis) and Raman spectroscopy. Polymer samples were bombarded with 60 key C4+ and N4+ ion beams to various fluences ranging from 1.0 x 10(13) to 1.0 x 10(16) cm(-2). The indirect and direct band gaps have been determined. The values of direct band gaps have been found to be greater than the corresponding values of the indirect band gaps. Activation energy has been investigated as the function of ion fluences. The number of carbon atoms per conjugated length is determined according to modified Taucs equation. The correlation between the optical band gap, activation energy for optical transition and the number of carbon atoms per conjugated length as well as chemical structure changes induced by ion beams irradiation have been discussed in the case of ethylene-norbornene copolymer. (C) 2011 Elsevier B.V. All rights reserved.
T2  - Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
T1  - Effect of N4+ and C4+ ion beam bombardment on the optical and structural characteristics of ethylene-norbornene copolymer (TOPAS)
VL  - 269
IS  - 7
SP  - 708
EP  - 715
DO  - 10.1016/j.nimb.2011.01.134
ER  - 

@article{
author = "Šiljegović, Milorad and Kačarević-Popović, Zorica M. and Krklješ, Aleksandra N. and Stojanović, Zoran A. and Jovanović, Zoran M.",
year = "2011",
abstract = "Ion bombardment is a suitable tool to modify the optical properties of polymers. In the present study the effect of ion bombardment on the optical absorption of ethylene-norbornene copolymer (TOPAS) was studied using ultraviolet-visible (UV-Vis) and Raman spectroscopy. Polymer samples were bombarded with 60 key C4+ and N4+ ion beams to various fluences ranging from 1.0 x 10(13) to 1.0 x 10(16) cm(-2). The indirect and direct band gaps have been determined. The values of direct band gaps have been found to be greater than the corresponding values of the indirect band gaps. Activation energy has been investigated as the function of ion fluences. The number of carbon atoms per conjugated length is determined according to modified Taucs equation. The correlation between the optical band gap, activation energy for optical transition and the number of carbon atoms per conjugated length as well as chemical structure changes induced by ion beams irradiation have been discussed in the case of ethylene-norbornene copolymer. (C) 2011 Elsevier B.V. All rights reserved.",
journal = "Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms",
title = "Effect of N4+ and C4+ ion beam bombardment on the optical and structural characteristics of ethylene-norbornene copolymer (TOPAS)",
volume = "269",
number = "7",
pages = "708-715",
doi = "10.1016/j.nimb.2011.01.134"
}

Šiljegović, M., Kačarević-Popović, Z. M., Krklješ, A. N., Stojanović, Z. A.,& Jovanović, Z. M.. (2011). Effect of N4+ and C4+ ion beam bombardment on the optical and structural characteristics of ethylene-norbornene copolymer (TOPAS). in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 269(7), 708-715.
https://doi.org/10.1016/j.nimb.2011.01.134

Šiljegović M, Kačarević-Popović ZM, Krklješ AN, Stojanović ZA, Jovanović ZM. Effect of N4+ and C4+ ion beam bombardment on the optical and structural characteristics of ethylene-norbornene copolymer (TOPAS). in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms. 2011;269(7):708-715.
doi:10.1016/j.nimb.2011.01.134 .

Šiljegović, Milorad, Kačarević-Popović, Zorica M., Krklješ, Aleksandra N., Stojanović, Zoran A., Jovanović, Zoran M., "Effect of N4+ and C4+ ion beam bombardment on the optical and structural characteristics of ethylene-norbornene copolymer (TOPAS)" in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 269, no. 7 (2011):708-715,
https://doi.org/10.1016/j.nimb.2011.01.134 . .

TY  - JOUR
AU  - Šiljegović, Milorad
AU  - Kačarević-Popović, Zorica M.
AU  - Bibić, Nataša M.
AU  - Jovanović, Zoran M.
AU  - Maletić, Slobodan
AU  - Stchakovsky, M.
AU  - Krklješ, Aleksandra N.
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4516
AB  - Fluorinated ethylene propylene (FEP) and tetrafluoroethylene-perfluoro(alkoxy vinyl ether) (PFA) copolymer films were irradiated in vacuum with 60 key C4+ and N4+ ions to fluences ranging from 1.0 x 10(12) to 5.0 x 10(15) cm(-2). Changes in optical and dielectric properties were analyzed by spectroscopic ellipsometry and ultraviolet-visible (UV-vis), Raman and dielectric relaxation spectroscopies. Direct and indirect energy band gap values were determined from the absorption edge in the 200-800 nm region using Taucs relation. The values of the direct energy gap have been found to be greater than the corresponding values of the indirect energy gap. Significant changes in the index of refraction, and 13 and gamma dielectric relaxations were observed in the case of N4+ irradiated FEP and PFA samples. (C) 2011 Elsevier Ltd. All rights reserved.
T2  - Radiation Physics and Chemistry
T1  - Optical and dielectric properties of fluorinated ethylene propylene and tetrafluoroethylene-perfluoro(alkoxy vinyl ether) copolymer films modified by low energy N4+ and C4+ ion beams
VL  - 80
IS  - 12
SP  - 1378
EP  - 1385
DO  - 10.1016/j.radphyschem.2011.08.012
ER  - 

@article{
author = "Šiljegović, Milorad and Kačarević-Popović, Zorica M. and Bibić, Nataša M. and Jovanović, Zoran M. and Maletić, Slobodan and Stchakovsky, M. and Krklješ, Aleksandra N.",
year = "2011",
abstract = "Fluorinated ethylene propylene (FEP) and tetrafluoroethylene-perfluoro(alkoxy vinyl ether) (PFA) copolymer films were irradiated in vacuum with 60 key C4+ and N4+ ions to fluences ranging from 1.0 x 10(12) to 5.0 x 10(15) cm(-2). Changes in optical and dielectric properties were analyzed by spectroscopic ellipsometry and ultraviolet-visible (UV-vis), Raman and dielectric relaxation spectroscopies. Direct and indirect energy band gap values were determined from the absorption edge in the 200-800 nm region using Taucs relation. The values of the direct energy gap have been found to be greater than the corresponding values of the indirect energy gap. Significant changes in the index of refraction, and 13 and gamma dielectric relaxations were observed in the case of N4+ irradiated FEP and PFA samples. (C) 2011 Elsevier Ltd. All rights reserved.",
journal = "Radiation Physics and Chemistry",
title = "Optical and dielectric properties of fluorinated ethylene propylene and tetrafluoroethylene-perfluoro(alkoxy vinyl ether) copolymer films modified by low energy N4+ and C4+ ion beams",
volume = "80",
number = "12",
pages = "1378-1385",
doi = "10.1016/j.radphyschem.2011.08.012"
}

Šiljegović, M., Kačarević-Popović, Z. M., Bibić, N. M., Jovanović, Z. M., Maletić, S., Stchakovsky, M.,& Krklješ, A. N.. (2011). Optical and dielectric properties of fluorinated ethylene propylene and tetrafluoroethylene-perfluoro(alkoxy vinyl ether) copolymer films modified by low energy N4+ and C4+ ion beams. in Radiation Physics and Chemistry, 80(12), 1378-1385.
https://doi.org/10.1016/j.radphyschem.2011.08.012

Šiljegović M, Kačarević-Popović ZM, Bibić NM, Jovanović ZM, Maletić S, Stchakovsky M, Krklješ AN. Optical and dielectric properties of fluorinated ethylene propylene and tetrafluoroethylene-perfluoro(alkoxy vinyl ether) copolymer films modified by low energy N4+ and C4+ ion beams. in Radiation Physics and Chemistry. 2011;80(12):1378-1385.
doi:10.1016/j.radphyschem.2011.08.012 .

Šiljegović, Milorad, Kačarević-Popović, Zorica M., Bibić, Nataša M., Jovanović, Zoran M., Maletić, Slobodan, Stchakovsky, M., Krklješ, Aleksandra N., "Optical and dielectric properties of fluorinated ethylene propylene and tetrafluoroethylene-perfluoro(alkoxy vinyl ether) copolymer films modified by low energy N4+ and C4+ ion beams" in Radiation Physics and Chemistry, 80, no. 12 (2011):1378-1385,
https://doi.org/10.1016/j.radphyschem.2011.08.012 . .

TY  - JOUR
AU  - Umićević, Ana
AU  - Cekić, Božidar Đ.
AU  - Ivanovski, Valentin N.
AU  - Koteski, Vasil J.
AU  - Belošević-Čavor, Jelena
AU  - Šiljegović, Milorad
AU  - Pavlović, S.
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3694
AB  - The hyperfine interactions of Ta-181 probe in the nickel-2 at.% hafnium alloy have been studied by the perturbed angular correlation method in the temperature range 78-1131K. The magnitude of the magnetic dipole interaction of Hf-181/Ta-181 substituting in ferromagnetic Ni(Hf) solid solution decreases with increasing temperature. As a result of the restricted solid solubility of Hf in Ni, a second phase (HfNi5) in the Ni-Hf sample was detected. Hf-181/Ta-181 which resides in HfNi5 senses weak electric quadrupole interaction. The observed anomalous temperature behavior was ascribed to distortions in the HfNi5 cubic phase. The third measured hyperfine interaction corresponds to the quadrupole interaction of Hf-181/Ta-181 positioned in HfO2 contamination originating from an annealing procedure above 900 K.
T2  - Journal of Alloys and Compounds
T1  - Magnetic dipole and electric quadrupole interactions of 181Ta probe in Ni-Hf alloy
VL  - 475
IS  - 1-2
SP  - 38
EP  - 41
DO  - 10.1016/j.jallcom.2008.07.107
ER  - 

@article{
author = "Umićević, Ana and Cekić, Božidar Đ. and Ivanovski, Valentin N. and Koteski, Vasil J. and Belošević-Čavor, Jelena and Šiljegović, Milorad and Pavlović, S.",
year = "2009",
abstract = "The hyperfine interactions of Ta-181 probe in the nickel-2 at.% hafnium alloy have been studied by the perturbed angular correlation method in the temperature range 78-1131K. The magnitude of the magnetic dipole interaction of Hf-181/Ta-181 substituting in ferromagnetic Ni(Hf) solid solution decreases with increasing temperature. As a result of the restricted solid solubility of Hf in Ni, a second phase (HfNi5) in the Ni-Hf sample was detected. Hf-181/Ta-181 which resides in HfNi5 senses weak electric quadrupole interaction. The observed anomalous temperature behavior was ascribed to distortions in the HfNi5 cubic phase. The third measured hyperfine interaction corresponds to the quadrupole interaction of Hf-181/Ta-181 positioned in HfO2 contamination originating from an annealing procedure above 900 K.",
journal = "Journal of Alloys and Compounds",
title = "Magnetic dipole and electric quadrupole interactions of 181Ta probe in Ni-Hf alloy",
volume = "475",
number = "1-2",
pages = "38-41",
doi = "10.1016/j.jallcom.2008.07.107"
}

Umićević, A., Cekić, B. Đ., Ivanovski, V. N., Koteski, V. J., Belošević-Čavor, J., Šiljegović, M.,& Pavlović, S.. (2009). Magnetic dipole and electric quadrupole interactions of 181Ta probe in Ni-Hf alloy. in Journal of Alloys and Compounds, 475(1-2), 38-41.
https://doi.org/10.1016/j.jallcom.2008.07.107

Umićević A, Cekić BĐ, Ivanovski VN, Koteski VJ, Belošević-Čavor J, Šiljegović M, Pavlović S. Magnetic dipole and electric quadrupole interactions of 181Ta probe in Ni-Hf alloy. in Journal of Alloys and Compounds. 2009;475(1-2):38-41.
doi:10.1016/j.jallcom.2008.07.107 .

Umićević, Ana, Cekić, Božidar Đ., Ivanovski, Valentin N., Koteski, Vasil J., Belošević-Čavor, Jelena, Šiljegović, Milorad, Pavlović, S., "Magnetic dipole and electric quadrupole interactions of 181Ta probe in Ni-Hf alloy" in Journal of Alloys and Compounds, 475, no. 1-2 (2009):38-41,
https://doi.org/10.1016/j.jallcom.2008.07.107 . .

TY  - JOUR
AU  - Matović, Branko
AU  - Novaković, Nikola
AU  - Kurko, Sandra V.
AU  - Šiljegović, Milorad
AU  - Kačarević-Popović, Zorica M.
AU  - Romčević, Nebojša Ž.
AU  - Ivanović, Nenad
AU  - Grbović-Novaković, Jasmina
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3793
AB  - MgH(2) powder samples have been irradiated with 120 keV Ar(+8) ions with different ion fluencies ranging from 10(12) to 10(16) ions/cm(2). irradiation effects are estimated by SRIM calculations, and investigated experimentally using Raman spectroscopy and X-ray diffraction (XRD) analysis. The observed changes of structure and vibrational spectra are elaborated, their consequences on hydrogen bonding in MgH(2) discussed, and influence on H-desorption properties investigated by Temperature Programmed Desorption (TPD) and Differential Scanning Calorimetry (DSC) techniques. it has been established that near-surface defects have a predominant influence on decreasing the H-desorption temperature. Variations of Raman, TPD and DSC spectra with irradiation conditions suggest that there are several mechanisms of dehydriding, and that they depend on defect concentration, interaction and ordering. (C) 2009 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
T2  - International Journal of Hydrogen Energy
T1  - Structural destabilisation of MgH(2) obtained by heavy ion irradiation
VL  - 34
IS  - 17
SP  - 7275
EP  - 7282
DO  - 10.1016/j.ijhydene.2009.06.081
ER  - 

@article{
author = "Matović, Branko and Novaković, Nikola and Kurko, Sandra V. and Šiljegović, Milorad and Kačarević-Popović, Zorica M. and Romčević, Nebojša Ž. and Ivanović, Nenad and Grbović-Novaković, Jasmina",
year = "2009",
abstract = "MgH(2) powder samples have been irradiated with 120 keV Ar(+8) ions with different ion fluencies ranging from 10(12) to 10(16) ions/cm(2). irradiation effects are estimated by SRIM calculations, and investigated experimentally using Raman spectroscopy and X-ray diffraction (XRD) analysis. The observed changes of structure and vibrational spectra are elaborated, their consequences on hydrogen bonding in MgH(2) discussed, and influence on H-desorption properties investigated by Temperature Programmed Desorption (TPD) and Differential Scanning Calorimetry (DSC) techniques. it has been established that near-surface defects have a predominant influence on decreasing the H-desorption temperature. Variations of Raman, TPD and DSC spectra with irradiation conditions suggest that there are several mechanisms of dehydriding, and that they depend on defect concentration, interaction and ordering. (C) 2009 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.",
journal = "International Journal of Hydrogen Energy",
title = "Structural destabilisation of MgH(2) obtained by heavy ion irradiation",
volume = "34",
number = "17",
pages = "7275-7282",
doi = "10.1016/j.ijhydene.2009.06.081"
}

Matović, B., Novaković, N., Kurko, S. V., Šiljegović, M., Kačarević-Popović, Z. M., Romčević, N. Ž., Ivanović, N.,& Grbović-Novaković, J.. (2009). Structural destabilisation of MgH(2) obtained by heavy ion irradiation. in International Journal of Hydrogen Energy, 34(17), 7275-7282.
https://doi.org/10.1016/j.ijhydene.2009.06.081

Matović B, Novaković N, Kurko SV, Šiljegović M, Kačarević-Popović ZM, Romčević NŽ, Ivanović N, Grbović-Novaković J. Structural destabilisation of MgH(2) obtained by heavy ion irradiation. in International Journal of Hydrogen Energy. 2009;34(17):7275-7282.
doi:10.1016/j.ijhydene.2009.06.081 .

Matović, Branko, Novaković, Nikola, Kurko, Sandra V., Šiljegović, Milorad, Kačarević-Popović, Zorica M., Romčević, Nebojša Ž., Ivanović, Nenad, Grbović-Novaković, Jasmina, "Structural destabilisation of MgH(2) obtained by heavy ion irradiation" in International Journal of Hydrogen Energy, 34, no. 17 (2009):7275-7282,
https://doi.org/10.1016/j.ijhydene.2009.06.081 . .

TY  - JOUR
AU  - Djosic, M. S.
AU  - Bibić, Nataša M.
AU  - Mitrić, Miodrag
AU  - Šiljegović, Milorad
AU  - Stojanovic, J. N.
AU  - Jokić, Bojan M.
AU  - Janaćković, Đorđe T.
AU  - Mišković-Stanković, Vesna B.
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3872
AB  - Surface modification of hydroxyapatite (HA) thin films electrodeposited on titanium was conducted by ion implantation, using nitrogen and argon ions at different constant fluences of 1x10(15), 1x10(16) and 1x10(17) ions/cm(2). SEM and XRD analysis, as well as SRIM calculation, were used to monitor the changes induced by ion bombardment. In the case of HA film implanted with N(4+) ions, the unit cell parameters and unit cell volume increase with increasing nitrogen ion fluences. Similarly, the unit cell parameters and unit cell volume increase after Ar(6+) ions irradiation to a 1x10(15) ions/cm(2). At higher fluences, the unit cell parameters and unit cell volume decrease when argon ion fluences increase to 1x10(16) and 1x10(17) ions/cm(2). These structural changes are consequence of different mechanism of energy transfer of nitrogen and argon ions to HA film. For nitrogen ion irradiation electron energy loss is predominant, while for argon ion irradiation nuclear energy transfer to HA film prevails.
T2  - Journal of Optoelectronics and Advanced Materials
T1  - Electrodeposited hydroxyapatite thin films modified by ion beam irradiation
VL  - 11
IS  - 11
SP  - 1848
EP  - 1854
UR  - https://hdl.handle.net/21.15107/rcub_vinar_3872
ER  - 

@article{
author = "Djosic, M. S. and Bibić, Nataša M. and Mitrić, Miodrag and Šiljegović, Milorad and Stojanovic, J. N. and Jokić, Bojan M. and Janaćković, Đorđe T. and Mišković-Stanković, Vesna B.",
year = "2009",
abstract = "Surface modification of hydroxyapatite (HA) thin films electrodeposited on titanium was conducted by ion implantation, using nitrogen and argon ions at different constant fluences of 1x10(15), 1x10(16) and 1x10(17) ions/cm(2). SEM and XRD analysis, as well as SRIM calculation, were used to monitor the changes induced by ion bombardment. In the case of HA film implanted with N(4+) ions, the unit cell parameters and unit cell volume increase with increasing nitrogen ion fluences. Similarly, the unit cell parameters and unit cell volume increase after Ar(6+) ions irradiation to a 1x10(15) ions/cm(2). At higher fluences, the unit cell parameters and unit cell volume decrease when argon ion fluences increase to 1x10(16) and 1x10(17) ions/cm(2). These structural changes are consequence of different mechanism of energy transfer of nitrogen and argon ions to HA film. For nitrogen ion irradiation electron energy loss is predominant, while for argon ion irradiation nuclear energy transfer to HA film prevails.",
journal = "Journal of Optoelectronics and Advanced Materials",
title = "Electrodeposited hydroxyapatite thin films modified by ion beam irradiation",
volume = "11",
number = "11",
pages = "1848-1854",
url = "https://hdl.handle.net/21.15107/rcub_vinar_3872"
}

Djosic, M. S., Bibić, N. M., Mitrić, M., Šiljegović, M., Stojanovic, J. N., Jokić, B. M., Janaćković, Đ. T.,& Mišković-Stanković, V. B.. (2009). Electrodeposited hydroxyapatite thin films modified by ion beam irradiation. in Journal of Optoelectronics and Advanced Materials, 11(11), 1848-1854.
https://hdl.handle.net/21.15107/rcub_vinar_3872

Djosic MS, Bibić NM, Mitrić M, Šiljegović M, Stojanovic JN, Jokić BM, Janaćković ĐT, Mišković-Stanković VB. Electrodeposited hydroxyapatite thin films modified by ion beam irradiation. in Journal of Optoelectronics and Advanced Materials. 2009;11(11):1848-1854.
https://hdl.handle.net/21.15107/rcub_vinar_3872 .

Djosic, M. S., Bibić, Nataša M., Mitrić, Miodrag, Šiljegović, Milorad, Stojanovic, J. N., Jokić, Bojan M., Janaćković, Đorđe T., Mišković-Stanković, Vesna B., "Electrodeposited hydroxyapatite thin films modified by ion beam irradiation" in Journal of Optoelectronics and Advanced Materials, 11, no. 11 (2009):1848-1854,
https://hdl.handle.net/21.15107/rcub_vinar_3872 .

TY  - JOUR
AU  - Grbović-Novaković, Jasmina
AU  - Matović, Ljiljana
AU  - Drvendzija, M.
AU  - Novaković, Nikola
AU  - Rajnović, Dragan
AU  - Šiljegović, Milorad
AU  - Kačarević-Popović, Zorica M.
AU  - Milovanović, S.
AU  - Ivanović, Nenad
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3439
AB  - In order to understand the influence of defect zones on desorption behavior of MgH2, Xe 120 keV ion irradiation of this material has been performed. DSC, SEM measurements, and SRIM calculations have been used to characterize induced modifications and its influence on the hydrogen desorption behavior of MgH2. We have demonstrated that the near-surface area of MgH2 plays the crucial role in hydrogen desorption kinetics. DSC analysis provides clear picture of vacancies influence on H diffusion and desorption in MgH2, and points out that there is possibility to control the thermodynamic parameters by controlled ion bombardment. (C) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
T2  - International Journal of Hydrogen Energy
T1  - Changes of hydrogen storage properties of MgH2 induced by heavy ion irradiation
VL  - 33
IS  - 7
SP  - 1876
EP  - 1879
DO  - 10.1016/j.ijhydene.2008.02.008
ER  - 

@article{
author = "Grbović-Novaković, Jasmina and Matović, Ljiljana and Drvendzija, M. and Novaković, Nikola and Rajnović, Dragan and Šiljegović, Milorad and Kačarević-Popović, Zorica M. and Milovanović, S. and Ivanović, Nenad",
year = "2008",
abstract = "In order to understand the influence of defect zones on desorption behavior of MgH2, Xe 120 keV ion irradiation of this material has been performed. DSC, SEM measurements, and SRIM calculations have been used to characterize induced modifications and its influence on the hydrogen desorption behavior of MgH2. We have demonstrated that the near-surface area of MgH2 plays the crucial role in hydrogen desorption kinetics. DSC analysis provides clear picture of vacancies influence on H diffusion and desorption in MgH2, and points out that there is possibility to control the thermodynamic parameters by controlled ion bombardment. (C) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.",
journal = "International Journal of Hydrogen Energy",
title = "Changes of hydrogen storage properties of MgH2 induced by heavy ion irradiation",
volume = "33",
number = "7",
pages = "1876-1879",
doi = "10.1016/j.ijhydene.2008.02.008"
}

Grbović-Novaković, J., Matović, L., Drvendzija, M., Novaković, N., Rajnović, D., Šiljegović, M., Kačarević-Popović, Z. M., Milovanović, S.,& Ivanović, N.. (2008). Changes of hydrogen storage properties of MgH2 induced by heavy ion irradiation. in International Journal of Hydrogen Energy, 33(7), 1876-1879.
https://doi.org/10.1016/j.ijhydene.2008.02.008

Grbović-Novaković J, Matović L, Drvendzija M, Novaković N, Rajnović D, Šiljegović M, Kačarević-Popović ZM, Milovanović S, Ivanović N. Changes of hydrogen storage properties of MgH2 induced by heavy ion irradiation. in International Journal of Hydrogen Energy. 2008;33(7):1876-1879.
doi:10.1016/j.ijhydene.2008.02.008 .

Grbović-Novaković, Jasmina, Matović, Ljiljana, Drvendzija, M., Novaković, Nikola, Rajnović, Dragan, Šiljegović, Milorad, Kačarević-Popović, Zorica M., Milovanović, S., Ivanović, Nenad, "Changes of hydrogen storage properties of MgH2 induced by heavy ion irradiation" in International Journal of Hydrogen Energy, 33, no. 7 (2008):1876-1879,
https://doi.org/10.1016/j.ijhydene.2008.02.008 . .

TY  - JOUR
AU  - Bibić, Nataša M.
AU  - Milinović, Velimir
AU  - Milosavljević, Momir
AU  - Schrempel, F.
AU  - Šiljegović, Milorad
AU  - Lieb, K. P.
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3575
AB  - Ion beam mixing of Fe/Si bilayers, induced by 100 keV (40)Arions at room temperature was investigated. Rutherford backscattering spectroscopy (RBS), atomic force microscopy (AFM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were applied for structural characterization. The main focus of this study was on the influence of the substrate structure on interface mixing. The influence of the substrate structure is due to the two classes of irradiated bilayers, Fe thin films deposited on crystalline or pre-amorphized Si substrates. An about 76% higher efficiency of atomic transport across the pre-amorphized Fe/a-Si interface as compared to that of Fe/c-Si bilayers was observed.
T2  - Journal of Microscopy, Oxford
T1  - Effects of the Ar ions pre-amorphization of Si substrateon interface mixing of Fe/Si bilayers
VL  - 232
IS  - 3
SP  - 539
EP  - 541
DO  - 10.1111/j.1365-2818.2008.02143.x
ER  - 

@article{
author = "Bibić, Nataša M. and Milinović, Velimir and Milosavljević, Momir and Schrempel, F. and Šiljegović, Milorad and Lieb, K. P.",
year = "2008",
abstract = "Ion beam mixing of Fe/Si bilayers, induced by 100 keV (40)Arions at room temperature was investigated. Rutherford backscattering spectroscopy (RBS), atomic force microscopy (AFM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were applied for structural characterization. The main focus of this study was on the influence of the substrate structure on interface mixing. The influence of the substrate structure is due to the two classes of irradiated bilayers, Fe thin films deposited on crystalline or pre-amorphized Si substrates. An about 76% higher efficiency of atomic transport across the pre-amorphized Fe/a-Si interface as compared to that of Fe/c-Si bilayers was observed.",
journal = "Journal of Microscopy, Oxford",
title = "Effects of the Ar ions pre-amorphization of Si substrateon interface mixing of Fe/Si bilayers",
volume = "232",
number = "3",
pages = "539-541",
doi = "10.1111/j.1365-2818.2008.02143.x"
}

Bibić, N. M., Milinović, V., Milosavljević, M., Schrempel, F., Šiljegović, M.,& Lieb, K. P.. (2008). Effects of the Ar ions pre-amorphization of Si substrateon interface mixing of Fe/Si bilayers. in Journal of Microscopy, Oxford, 232(3), 539-541.
https://doi.org/10.1111/j.1365-2818.2008.02143.x

Bibić NM, Milinović V, Milosavljević M, Schrempel F, Šiljegović M, Lieb KP. Effects of the Ar ions pre-amorphization of Si substrateon interface mixing of Fe/Si bilayers. in Journal of Microscopy, Oxford. 2008;232(3):539-541.
doi:10.1111/j.1365-2818.2008.02143.x .

Bibić, Nataša M., Milinović, Velimir, Milosavljević, Momir, Schrempel, F., Šiljegović, Milorad, Lieb, K. P., "Effects of the Ar ions pre-amorphization of Si substrateon interface mixing of Fe/Si bilayers" in Journal of Microscopy, Oxford, 232, no. 3 (2008):539-541,
https://doi.org/10.1111/j.1365-2818.2008.02143.x . .

TY  - JOUR
AU  - Bibić, Nataša M.
AU  - Lieb, K. P.
AU  - Milinović, Velimir
AU  - Mitrić, Miodrag
AU  - Šiljegović, Milorad
AU  - Zhang, Kun
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6767
AB  - Heavy-ion irradiation of ferromagnetic thin layers changes their micromagnetic and microstructural properties, due to the production of defects, relaxation or build-up of stress, or changes of grain size. When the ion range exceeds the layer thickness, ion mixing processes take place, leading to the formation of silicide phases. The present study deals with CO(30 or 55 nm)/Si bilayers irradiated at room temperature with 100- or 200 keV Xe ions to fluences of up to 15 x 10(15)/cm(2). The Si(100) wafers were either crystalline or pre-amorphized by 1 keV Ar+ implantation. Rutherford backscattering spectroscopy, in-plane magneto-optical Kerr effect, and X-ray diffraction served to analyse the samples before and after irradiation. The results will be compared with those obtained for other heavy-ions for Co/Si bilayers and in similar studies on Fe/Si bilayers. (C) 2008 Elsevier B.V. All rights reserved.
T2  - Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
T1  - Xenon-ion irradiation of Co/Si bilayers: Effects of interface structure and ion energy
VL  - 266
IS  - 10
SP  - 2498
EP  - 2502
DO  - 10.1016/j.nimb.2008.03.033
ER  - 

@article{
author = "Bibić, Nataša M. and Lieb, K. P. and Milinović, Velimir and Mitrić, Miodrag and Šiljegović, Milorad and Zhang, Kun",
year = "2008",
abstract = "Heavy-ion irradiation of ferromagnetic thin layers changes their micromagnetic and microstructural properties, due to the production of defects, relaxation or build-up of stress, or changes of grain size. When the ion range exceeds the layer thickness, ion mixing processes take place, leading to the formation of silicide phases. The present study deals with CO(30 or 55 nm)/Si bilayers irradiated at room temperature with 100- or 200 keV Xe ions to fluences of up to 15 x 10(15)/cm(2). The Si(100) wafers were either crystalline or pre-amorphized by 1 keV Ar+ implantation. Rutherford backscattering spectroscopy, in-plane magneto-optical Kerr effect, and X-ray diffraction served to analyse the samples before and after irradiation. The results will be compared with those obtained for other heavy-ions for Co/Si bilayers and in similar studies on Fe/Si bilayers. (C) 2008 Elsevier B.V. All rights reserved.",
journal = "Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms",
title = "Xenon-ion irradiation of Co/Si bilayers: Effects of interface structure and ion energy",
volume = "266",
number = "10",
pages = "2498-2502",
doi = "10.1016/j.nimb.2008.03.033"
}

Bibić, N. M., Lieb, K. P., Milinović, V., Mitrić, M., Šiljegović, M.,& Zhang, K.. (2008). Xenon-ion irradiation of Co/Si bilayers: Effects of interface structure and ion energy. in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 266(10), 2498-2502.
https://doi.org/10.1016/j.nimb.2008.03.033

Bibić NM, Lieb KP, Milinović V, Mitrić M, Šiljegović M, Zhang K. Xenon-ion irradiation of Co/Si bilayers: Effects of interface structure and ion energy. in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms. 2008;266(10):2498-2502.
doi:10.1016/j.nimb.2008.03.033 .

Bibić, Nataša M., Lieb, K. P., Milinović, Velimir, Mitrić, Miodrag, Šiljegović, Milorad, Zhang, Kun, "Xenon-ion irradiation of Co/Si bilayers: Effects of interface structure and ion energy" in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 266, no. 10 (2008):2498-2502,
https://doi.org/10.1016/j.nimb.2008.03.033 . .

TY  - CONF
AU  - Cekić, Božidar
AU  - Umićević, Ana
AU  - Ivanovski, Valentin
AU  - Belošević-Čavor, Jelena
AU  - Koteski, Vasil
AU  - Pavlović, Snežana
AU  - Šiljegović, Milorad
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12521
AB  - We have measured hyperfine interactions of 181Ta probe in the polycrystalline 0.2at.%Hf-Ni, 2at.%Hf-Ni and 5at.%Hf-Ni alloys, by the time differential perturbed angular correlation (TDPAC) method at room temperature (RT). The hyperfine magnetic field (Hhf) in 0.2at.%Hf-Ni alloy at the 181Ta probe is 8.66(1)T, where the small atomic concentrations of Hf atoms mainly substitute on Ni host lattice sites. Three hyperfine interactions were detected in two other alloys. In the 2at.%Hf-Ni alloy, we found existence of Larmor precession frequency ωL (1)=536(2)Mrad/s at the 181Ta probe surrounded by Ni atoms and the second electric quadrupole interaction (EQI) ωQ (2)=2.20(2)Mrad/s at the 181Ta probe in new formed HfNi5 intermetallic phase. The third EQI ωQ (3)=137.4(1)Mrad/s corresponds to the small amount of monoclinic HfO2 phase contamination at T<900K. In the 5at%Hf-Ni alloy, magnetic dipole interaction (MDI) at the 181Ta probe is ωL (1)=536(6)Mrad/s, while the second EQI at the site of the same probe in HfNi5 is ωQ (2)=2.24(2)Mrad/s. The presence of ωQ (3)=128(1)Mrad/s at the 181Ta probe originating from HfO2 contamination is in good accordance with earlier published results for this phase.
PB  - Beograd : Društvo ETRAN
C3  - ETRAN : 52. konferencija ETRAN-a : Zbornik radova
T1  - Hyperfine interactions at 181Ta solute in ferromagnetic Hf-Ni alloys with low concentration of Hf atoms
SP  - NM1.9-1-3
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12521
ER  - 

@conference{
author = "Cekić, Božidar and Umićević, Ana and Ivanovski, Valentin and Belošević-Čavor, Jelena and Koteski, Vasil and Pavlović, Snežana and Šiljegović, Milorad",
year = "2008",
abstract = "We have measured hyperfine interactions of 181Ta probe in the polycrystalline 0.2at.%Hf-Ni, 2at.%Hf-Ni and 5at.%Hf-Ni alloys, by the time differential perturbed angular correlation (TDPAC) method at room temperature (RT). The hyperfine magnetic field (Hhf) in 0.2at.%Hf-Ni alloy at the 181Ta probe is 8.66(1)T, where the small atomic concentrations of Hf atoms mainly substitute on Ni host lattice sites. Three hyperfine interactions were detected in two other alloys. In the 2at.%Hf-Ni alloy, we found existence of Larmor precession frequency ωL (1)=536(2)Mrad/s at the 181Ta probe surrounded by Ni atoms and the second electric quadrupole interaction (EQI) ωQ (2)=2.20(2)Mrad/s at the 181Ta probe in new formed HfNi5 intermetallic phase. The third EQI ωQ (3)=137.4(1)Mrad/s corresponds to the small amount of monoclinic HfO2 phase contamination at T<900K. In the 5at%Hf-Ni alloy, magnetic dipole interaction (MDI) at the 181Ta probe is ωL (1)=536(6)Mrad/s, while the second EQI at the site of the same probe in HfNi5 is ωQ (2)=2.24(2)Mrad/s. The presence of ωQ (3)=128(1)Mrad/s at the 181Ta probe originating from HfO2 contamination is in good accordance with earlier published results for this phase.",
publisher = "Beograd : Društvo ETRAN",
journal = "ETRAN : 52. konferencija ETRAN-a : Zbornik radova",
title = "Hyperfine interactions at 181Ta solute in ferromagnetic Hf-Ni alloys with low concentration of Hf atoms",
pages = "NM1.9-1-3",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12521"
}

Cekić, B., Umićević, A., Ivanovski, V., Belošević-Čavor, J., Koteski, V., Pavlović, S.,& Šiljegović, M.. (2008). Hyperfine interactions at 181Ta solute in ferromagnetic Hf-Ni alloys with low concentration of Hf atoms. in ETRAN : 52. konferencija ETRAN-a : Zbornik radova
Beograd : Društvo ETRAN., NM1.9-1-3.
https://hdl.handle.net/21.15107/rcub_vinar_12521

Cekić B, Umićević A, Ivanovski V, Belošević-Čavor J, Koteski V, Pavlović S, Šiljegović M. Hyperfine interactions at 181Ta solute in ferromagnetic Hf-Ni alloys with low concentration of Hf atoms. in ETRAN : 52. konferencija ETRAN-a : Zbornik radova. 2008;:NM1.9-1-3.
https://hdl.handle.net/21.15107/rcub_vinar_12521 .

Cekić, Božidar, Umićević, Ana, Ivanovski, Valentin, Belošević-Čavor, Jelena, Koteski, Vasil, Pavlović, Snežana, Šiljegović, Milorad, "Hyperfine interactions at 181Ta solute in ferromagnetic Hf-Ni alloys with low concentration of Hf atoms" in ETRAN : 52. konferencija ETRAN-a : Zbornik radova (2008):NM1.9-1-3,
https://hdl.handle.net/21.15107/rcub_vinar_12521 .

TY  - CONF
AU  - Cekić, Božidar
AU  - Umićević, Ana
AU  - Ivanovski, Valentin
AU  - Belošević-Čavor, Jelena
AU  - Koteski, Vasil
AU  - Pavlović, Snežana
AU  - Šiljegović, Milorad
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12520
AB  - We have measured hyperfine interactions of 181Ta probe in the polycrystalline 0.2at.%Hf-Ni, 2at.%Hf-Ni and 5at.%Hf-Ni alloys, by the time differential perturbed angular correlation (TDPAC) method at room temperature (RT). The hyperfine magnetic field (Hhf) in 0.2at.%Hf-Ni alloy at the 181Ta probe is 8.66(1)T, where the small atomic concentrations of Hf atoms mainly substitute on Ni host lattice sites. Three hyperfine interactions were detected in two other alloys. In the 2at.%Hf-Ni alloy, we found existence of Larmor precession frequency ωL (1)=536(2)Mrad/s at the 181Ta  probe surrounded by Ni atoms and the second electric quadrupole interaction (EQI) ωQ (2)=2.20(2)Mrad/s at the 181Ta probe in new formed HfNi5 intermetallic phase. The third EQI ωQ (3)=137.4(1)Mrad/s corresponds to the small amount of monoclinic HfO2 phase contamination at T<900K. In the 5at%Hf-Ni alloy, magnetic dipole interaction (MDI) at the 181Ta probe is ωL (1)=536(6)Mrad/s, while the second EQI at the site of the same probe in HfNi5 is ωQ (2)=2.24(2)Mrad/s. The presence of ωQ (3)=128(1)Mrad/s at the 181Ta probe originating from HfO2 contamination is in good accordance with earlier published results for this phase.
PB  - Beograd : Društvo za ETRAN
C3  - ETRAN : 52. konferencija ETRAN-a : Zbornik apstrakata i program
T1  - Hyperfine interactions at 181Ta solute in ferromagnetic Hf-Ni alloys with low concentration of Hf atoms
SP  - 56
EP  - 56
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12520
ER  - 

@conference{
author = "Cekić, Božidar and Umićević, Ana and Ivanovski, Valentin and Belošević-Čavor, Jelena and Koteski, Vasil and Pavlović, Snežana and Šiljegović, Milorad",
year = "2008",
abstract = "We have measured hyperfine interactions of 181Ta probe in the polycrystalline 0.2at.%Hf-Ni, 2at.%Hf-Ni and 5at.%Hf-Ni alloys, by the time differential perturbed angular correlation (TDPAC) method at room temperature (RT). The hyperfine magnetic field (Hhf) in 0.2at.%Hf-Ni alloy at the 181Ta probe is 8.66(1)T, where the small atomic concentrations of Hf atoms mainly substitute on Ni host lattice sites. Three hyperfine interactions were detected in two other alloys. In the 2at.%Hf-Ni alloy, we found existence of Larmor precession frequency ωL (1)=536(2)Mrad/s at the 181Ta  probe surrounded by Ni atoms and the second electric quadrupole interaction (EQI) ωQ (2)=2.20(2)Mrad/s at the 181Ta probe in new formed HfNi5 intermetallic phase. The third EQI ωQ (3)=137.4(1)Mrad/s corresponds to the small amount of monoclinic HfO2 phase contamination at T<900K. In the 5at%Hf-Ni alloy, magnetic dipole interaction (MDI) at the 181Ta probe is ωL (1)=536(6)Mrad/s, while the second EQI at the site of the same probe in HfNi5 is ωQ (2)=2.24(2)Mrad/s. The presence of ωQ (3)=128(1)Mrad/s at the 181Ta probe originating from HfO2 contamination is in good accordance with earlier published results for this phase.",
publisher = "Beograd : Društvo za ETRAN",
journal = "ETRAN : 52. konferencija ETRAN-a : Zbornik apstrakata i program",
title = "Hyperfine interactions at 181Ta solute in ferromagnetic Hf-Ni alloys with low concentration of Hf atoms",
pages = "56-56",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12520"
}

Cekić, B., Umićević, A., Ivanovski, V., Belošević-Čavor, J., Koteski, V., Pavlović, S.,& Šiljegović, M.. (2008). Hyperfine interactions at 181Ta solute in ferromagnetic Hf-Ni alloys with low concentration of Hf atoms. in ETRAN : 52. konferencija ETRAN-a : Zbornik apstrakata i program
Beograd : Društvo za ETRAN., 56-56.
https://hdl.handle.net/21.15107/rcub_vinar_12520

Cekić B, Umićević A, Ivanovski V, Belošević-Čavor J, Koteski V, Pavlović S, Šiljegović M. Hyperfine interactions at 181Ta solute in ferromagnetic Hf-Ni alloys with low concentration of Hf atoms. in ETRAN : 52. konferencija ETRAN-a : Zbornik apstrakata i program. 2008;:56-56.
https://hdl.handle.net/21.15107/rcub_vinar_12520 .

Cekić, Božidar, Umićević, Ana, Ivanovski, Valentin, Belošević-Čavor, Jelena, Koteski, Vasil, Pavlović, Snežana, Šiljegović, Milorad, "Hyperfine interactions at 181Ta solute in ferromagnetic Hf-Ni alloys with low concentration of Hf atoms" in ETRAN : 52. konferencija ETRAN-a : Zbornik apstrakata i program (2008):56-56,
https://hdl.handle.net/21.15107/rcub_vinar_12520 .

TY  - CONF
AU  - Umićević, Ana
AU  - Ivanovski, Valentin
AU  - Koteski, Vasil
AU  - Belošević-Čavor, Jelena
AU  - Pavlović, S.
AU  - Šiljegović, Milorad
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12516
AB  - The electric quadrupole interaction in Hf2Ni was measured at 181Ta probe using the time-differential perturbed angular correlation method (TDPAC) in the temperature range 78 to 1314 K. Analysis of the obtained spectra revealed the presence of a single nuclear quadrupole interaction (NQI) and its linear descending dependence with increasing temperature. In the region 1134 to 1314 K, the presence of structural deformation is evident from the coincidence spectra.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - YUCOMAT 2007 : 9th Annual Conference YUCOMAT 2007 : Programme and the book of abstracts
T1  - Structural deformation in Hf2Ni observed by TDPAC method
SP  - 111
EP  - 111
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12516
ER  - 

@conference{
author = "Umićević, Ana and Ivanovski, Valentin and Koteski, Vasil and Belošević-Čavor, Jelena and Pavlović, S. and Šiljegović, Milorad",
year = "2007",
abstract = "The electric quadrupole interaction in Hf2Ni was measured at 181Ta probe using the time-differential perturbed angular correlation method (TDPAC) in the temperature range 78 to 1314 K. Analysis of the obtained spectra revealed the presence of a single nuclear quadrupole interaction (NQI) and its linear descending dependence with increasing temperature. In the region 1134 to 1314 K, the presence of structural deformation is evident from the coincidence spectra.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "YUCOMAT 2007 : 9th Annual Conference YUCOMAT 2007 : Programme and the book of abstracts",
title = "Structural deformation in Hf2Ni observed by TDPAC method",
pages = "111-111",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12516"
}

Umićević, A., Ivanovski, V., Koteski, V., Belošević-Čavor, J., Pavlović, S.,& Šiljegović, M.. (2007). Structural deformation in Hf2Ni observed by TDPAC method. in YUCOMAT 2007 : 9th Annual Conference YUCOMAT 2007 : Programme and the book of abstracts
Belgrade : Institute of Technical Sciences of SASA., 111-111.
https://hdl.handle.net/21.15107/rcub_vinar_12516

Umićević A, Ivanovski V, Koteski V, Belošević-Čavor J, Pavlović S, Šiljegović M. Structural deformation in Hf2Ni observed by TDPAC method. in YUCOMAT 2007 : 9th Annual Conference YUCOMAT 2007 : Programme and the book of abstracts. 2007;:111-111.
https://hdl.handle.net/21.15107/rcub_vinar_12516 .

Umićević, Ana, Ivanovski, Valentin, Koteski, Vasil, Belošević-Čavor, Jelena, Pavlović, S., Šiljegović, Milorad, "Structural deformation in Hf2Ni observed by TDPAC method" in YUCOMAT 2007 : 9th Annual Conference YUCOMAT 2007 : Programme and the book of abstracts (2007):111-111,
https://hdl.handle.net/21.15107/rcub_vinar_12516 .

TY  - CONF
AU  - Draganic, I.
AU  - Nedeljkovic, T.
AU  - Jovovic, J.
AU  - Šiljegović, Milorad
AU  - Dobrosavljević, Aleksandar S.
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6658
AB  - We have used the well known metal-ions-from-volatile-compounds (MIVOC) method at the mVINIS Ion Source to produce the multiply charged ion beams form solid substances. Based on this method the very intense and stable multiply charged ion beams of several solid substances having the high melting points were extracted. The ion yields and the spectra of multiply charged ion beams obtained from solid materials like Fe and Hf will be presented. We have utilized the multiply charged ion beams from solid substances to irradiate the polymers, fullerenes and glassy carbon at the low energy channel for modification of materials.
C3  - Journal of Physics: Conference Series
T1  - Multiply charged ions from solid substances with the mVINIS Ion Source
VL  - 58
SP  - 427
EP  - +
DO  - 10.1088/1742-6596/58/1/098
ER  - 

@conference{
author = "Draganic, I. and Nedeljkovic, T. and Jovovic, J. and Šiljegović, Milorad and Dobrosavljević, Aleksandar S.",
year = "2007",
abstract = "We have used the well known metal-ions-from-volatile-compounds (MIVOC) method at the mVINIS Ion Source to produce the multiply charged ion beams form solid substances. Based on this method the very intense and stable multiply charged ion beams of several solid substances having the high melting points were extracted. The ion yields and the spectra of multiply charged ion beams obtained from solid materials like Fe and Hf will be presented. We have utilized the multiply charged ion beams from solid substances to irradiate the polymers, fullerenes and glassy carbon at the low energy channel for modification of materials.",
journal = "Journal of Physics: Conference Series",
title = "Multiply charged ions from solid substances with the mVINIS Ion Source",
volume = "58",
pages = "427-+",
doi = "10.1088/1742-6596/58/1/098"
}

Draganic, I., Nedeljkovic, T., Jovovic, J., Šiljegović, M.,& Dobrosavljević, A. S.. (2007). Multiply charged ions from solid substances with the mVINIS Ion Source. in Journal of Physics: Conference Series, 58, 427-+.
https://doi.org/10.1088/1742-6596/58/1/098

Draganic I, Nedeljkovic T, Jovovic J, Šiljegović M, Dobrosavljević AS. Multiply charged ions from solid substances with the mVINIS Ion Source. in Journal of Physics: Conference Series. 2007;58:427-+.
doi:10.1088/1742-6596/58/1/098 .

Draganic, I., Nedeljkovic, T., Jovovic, J., Šiljegović, Milorad, Dobrosavljević, Aleksandar S., "Multiply charged ions from solid substances with the mVINIS Ion Source" in Journal of Physics: Conference Series, 58 (2007):427-+,
https://doi.org/10.1088/1742-6596/58/1/098 . .

TY  - JOUR
AU  - Draganic, I
AU  - Dobrosavljević, Aleksandar S.
AU  - Nedeljkovic, T
AU  - Šiljegović, Milorad
PY  - 2006
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6575
AB  - The mVINIS ion source has enabled us to obtain multiply charged ion beams from gases as well as from solid materials. The solid substance ion beams were produced by using two techniques: (a) the evaporation of metals by using the inlet system based on a minioven and (b) the metal-ions-from-volatile-compounds method (MIVOC) by using the modified gas inlet system. Great efforts were made in the production of high current stable ion beams of solids with relatively C ion-beam current of over 300 mu A was one of the most high melting points (over 1000 degrees C). The B3+ intensive beams extracted until now. The obtained multiply charged ion-beam spectra of solid substances (B, Fe, and Zn) are presented as well as some of the corresponding experimental results achieved during the modification of polymers, carbon materials, and fullerenes. (c) 2006 American Institute of Physics.
T2  - Review of Scientific Instruments
T1  - Production of multiply charged ion beams from solid substances with the mVINIS ion source
VL  - 77
IS  - 3
DO  - 10.1063/1.2151867
ER  - 

@article{
author = "Draganic, I and Dobrosavljević, Aleksandar S. and Nedeljkovic, T and Šiljegović, Milorad",
year = "2006",
abstract = "The mVINIS ion source has enabled us to obtain multiply charged ion beams from gases as well as from solid materials. The solid substance ion beams were produced by using two techniques: (a) the evaporation of metals by using the inlet system based on a minioven and (b) the metal-ions-from-volatile-compounds method (MIVOC) by using the modified gas inlet system. Great efforts were made in the production of high current stable ion beams of solids with relatively C ion-beam current of over 300 mu A was one of the most high melting points (over 1000 degrees C). The B3+ intensive beams extracted until now. The obtained multiply charged ion-beam spectra of solid substances (B, Fe, and Zn) are presented as well as some of the corresponding experimental results achieved during the modification of polymers, carbon materials, and fullerenes. (c) 2006 American Institute of Physics.",
journal = "Review of Scientific Instruments",
title = "Production of multiply charged ion beams from solid substances with the mVINIS ion source",
volume = "77",
number = "3",
doi = "10.1063/1.2151867"
}

Draganic, I., Dobrosavljević, A. S., Nedeljkovic, T.,& Šiljegović, M.. (2006). Production of multiply charged ion beams from solid substances with the mVINIS ion source. in Review of Scientific Instruments, 77(3).
https://doi.org/10.1063/1.2151867

Draganic I, Dobrosavljević AS, Nedeljkovic T, Šiljegović M. Production of multiply charged ion beams from solid substances with the mVINIS ion source. in Review of Scientific Instruments. 2006;77(3).
doi:10.1063/1.2151867 .

Draganic, I, Dobrosavljević, Aleksandar S., Nedeljkovic, T, Šiljegović, Milorad, "Production of multiply charged ion beams from solid substances with the mVINIS ion source" in Review of Scientific Instruments, 77, no. 3 (2006),
https://doi.org/10.1063/1.2151867 . .

TY  - JOUR
AU  - Šiljegović, Milorad
AU  - Dobrosavljević, Aleksandar S.
AU  - Draganic, I
AU  - Cizmic, B
AU  - Jelic, G
PY  - 2006
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6576
AB  - The low-energy part of the TESLA Accelerator Installation comprises an electron cyclotron resonance ion source (the mVINIS ion source) and the channel for modification of materials (L3A). The L3A channel is long and has low beam transmission (30%-50%), so it is not suitable for high fluence implantations (over 10(16) cm(-2)). Therefore, we are planning to introduce an experimental channel (L4), close to the mVINIS Ion Source, where we shall be able to achieve high beam currents on the target and, consequently, irradiation of materials to high fluences. During the ion implantation, we shall be able to measure fluence rate, achieve uniform fluence distribution by a mechanism for x and y sample movements, and control the sample temperature in the range of 0-200 degrees C. (c) 2006 American Institute of Physics.
T2  - Review of Scientific Instruments
T1  - Design of the channel for irradiation of materials with highly charged ion beams obtained from the mVINIS ion source
VL  - 77
IS  - 3
DO  - 10.1063/1.2163331
ER  - 

@article{
author = "Šiljegović, Milorad and Dobrosavljević, Aleksandar S. and Draganic, I and Cizmic, B and Jelic, G",
year = "2006",
abstract = "The low-energy part of the TESLA Accelerator Installation comprises an electron cyclotron resonance ion source (the mVINIS ion source) and the channel for modification of materials (L3A). The L3A channel is long and has low beam transmission (30%-50%), so it is not suitable for high fluence implantations (over 10(16) cm(-2)). Therefore, we are planning to introduce an experimental channel (L4), close to the mVINIS Ion Source, where we shall be able to achieve high beam currents on the target and, consequently, irradiation of materials to high fluences. During the ion implantation, we shall be able to measure fluence rate, achieve uniform fluence distribution by a mechanism for x and y sample movements, and control the sample temperature in the range of 0-200 degrees C. (c) 2006 American Institute of Physics.",
journal = "Review of Scientific Instruments",
title = "Design of the channel for irradiation of materials with highly charged ion beams obtained from the mVINIS ion source",
volume = "77",
number = "3",
doi = "10.1063/1.2163331"
}

Šiljegović, M., Dobrosavljević, A. S., Draganic, I., Cizmic, B.,& Jelic, G.. (2006). Design of the channel for irradiation of materials with highly charged ion beams obtained from the mVINIS ion source. in Review of Scientific Instruments, 77(3).
https://doi.org/10.1063/1.2163331

Šiljegović M, Dobrosavljević AS, Draganic I, Cizmic B, Jelic G. Design of the channel for irradiation of materials with highly charged ion beams obtained from the mVINIS ion source. in Review of Scientific Instruments. 2006;77(3).
doi:10.1063/1.2163331 .

Šiljegović, Milorad, Dobrosavljević, Aleksandar S., Draganic, I, Cizmic, B, Jelic, G, "Design of the channel for irradiation of materials with highly charged ion beams obtained from the mVINIS ion source" in Review of Scientific Instruments, 77, no. 3 (2006),
https://doi.org/10.1063/1.2163331 . .

TY  - JOUR
AU  - Kačarević-Popović, Zorica M.
AU  - Tjapkin, N
AU  - Šiljegović, Milorad
AU  - Draganic, I
PY  - 2005
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6516
AB  - The modifications of copolymer of ethylene and norbornene induced by irradiation with 60 keV N4+ ions to the fluencies of 1.0 x 10(16) ions cm(-2) have been investigated using DSC, TGA, U-V-spectroscopy, direct current surface resistivity and impedance measurements. The measured heat and thermal properties reveal remarkable stability against degradation. Copolymer properties studied at low electric field strengths were directly related to the modified molecular structure. The decrease in electrical resistivity was mainly attributed to conjugated double bond formation observed by ultraviolet spectroscopy. AC conductivity and capacitance obtained from the real and imaginary part of admittance varies with frequency. The movement of charge carriers may be related to relaxation phenomena in the material and is similar to those observed in many amorphous semiconductors. (c) 2005 Elsevier B.V. All rights reserved.
T2  - Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
T1  - Surface modification of ethylene-norbornene copolymer by irradiation with N4+ ion beams
VL  - 236
SP  - 594
EP  - 598
DO  - 10.1016/j.nimb.2005.04.048
ER  - 

@article{
author = "Kačarević-Popović, Zorica M. and Tjapkin, N and Šiljegović, Milorad and Draganic, I",
year = "2005",
abstract = "The modifications of copolymer of ethylene and norbornene induced by irradiation with 60 keV N4+ ions to the fluencies of 1.0 x 10(16) ions cm(-2) have been investigated using DSC, TGA, U-V-spectroscopy, direct current surface resistivity and impedance measurements. The measured heat and thermal properties reveal remarkable stability against degradation. Copolymer properties studied at low electric field strengths were directly related to the modified molecular structure. The decrease in electrical resistivity was mainly attributed to conjugated double bond formation observed by ultraviolet spectroscopy. AC conductivity and capacitance obtained from the real and imaginary part of admittance varies with frequency. The movement of charge carriers may be related to relaxation phenomena in the material and is similar to those observed in many amorphous semiconductors. (c) 2005 Elsevier B.V. All rights reserved.",
journal = "Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms",
title = "Surface modification of ethylene-norbornene copolymer by irradiation with N4+ ion beams",
volume = "236",
pages = "594-598",
doi = "10.1016/j.nimb.2005.04.048"
}

Kačarević-Popović, Z. M., Tjapkin, N., Šiljegović, M.,& Draganic, I.. (2005). Surface modification of ethylene-norbornene copolymer by irradiation with N4+ ion beams. in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 236, 594-598.
https://doi.org/10.1016/j.nimb.2005.04.048

Kačarević-Popović ZM, Tjapkin N, Šiljegović M, Draganic I. Surface modification of ethylene-norbornene copolymer by irradiation with N4+ ion beams. in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms. 2005;236:594-598.
doi:10.1016/j.nimb.2005.04.048 .

Kačarević-Popović, Zorica M., Tjapkin, N, Šiljegović, Milorad, Draganic, I, "Surface modification of ethylene-norbornene copolymer by irradiation with N4+ ion beams" in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 236 (2005):594-598,
https://doi.org/10.1016/j.nimb.2005.04.048 . .

TY  - JOUR
AU  - Milinović, Velimir
AU  - Bibić, Nataša M.
AU  - Dhar, S
AU  - Šiljegović, Milorad
AU  - Schaaf, P
AU  - Lieb, KP
PY  - 2004
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2813
AB  - In the course of a systematic investigation of heavy ion-irradiated Fe/Si layers, we have studied atomic transport and phase formation induced by 22-keV N-14(2+) ion implantation in Fe-57(30 nm)/Si bilayers at high fluences. We report here results obtained by Rutherford backscattering spectroscopy, X-ray diffraction, and conversion electron Mossbauer spectroscopy after implantation and post-implantation annealing treatments. The irradiations caused little sputtering, but significant interface mixing. During implantation, iron nitrides, but no silicides were formed, even at the highest nitrogen fluence of 2x10(17) ions/cm(2). When heating these samples in vacuo up to 700degreesC, the iron-rich phases Eepsilon-Fe3N and gamma-Fe4N were produced. Starting at 600degreesC the silicide phase beta-FeSi2 was also identified.
T2  - Applied Physics. A: Materials Science and Processing
T1  - Nitrogen irradiation of Fe/Si bilayers: nitride versus silicide phase formation
VL  - 79
IS  - 8
SP  - 2093
EP  - 2097
DO  - 10.1007/s00339-004-2889-2
ER  - 

@article{
author = "Milinović, Velimir and Bibić, Nataša M. and Dhar, S and Šiljegović, Milorad and Schaaf, P and Lieb, KP",
year = "2004",
abstract = "In the course of a systematic investigation of heavy ion-irradiated Fe/Si layers, we have studied atomic transport and phase formation induced by 22-keV N-14(2+) ion implantation in Fe-57(30 nm)/Si bilayers at high fluences. We report here results obtained by Rutherford backscattering spectroscopy, X-ray diffraction, and conversion electron Mossbauer spectroscopy after implantation and post-implantation annealing treatments. The irradiations caused little sputtering, but significant interface mixing. During implantation, iron nitrides, but no silicides were formed, even at the highest nitrogen fluence of 2x10(17) ions/cm(2). When heating these samples in vacuo up to 700degreesC, the iron-rich phases Eepsilon-Fe3N and gamma-Fe4N were produced. Starting at 600degreesC the silicide phase beta-FeSi2 was also identified.",
journal = "Applied Physics. A: Materials Science and Processing",
title = "Nitrogen irradiation of Fe/Si bilayers: nitride versus silicide phase formation",
volume = "79",
number = "8",
pages = "2093-2097",
doi = "10.1007/s00339-004-2889-2"
}

Milinović, V., Bibić, N. M., Dhar, S., Šiljegović, M., Schaaf, P.,& Lieb, K.. (2004). Nitrogen irradiation of Fe/Si bilayers: nitride versus silicide phase formation. in Applied Physics. A: Materials Science and Processing, 79(8), 2093-2097.
https://doi.org/10.1007/s00339-004-2889-2

Milinović V, Bibić NM, Dhar S, Šiljegović M, Schaaf P, Lieb K. Nitrogen irradiation of Fe/Si bilayers: nitride versus silicide phase formation. in Applied Physics. A: Materials Science and Processing. 2004;79(8):2093-2097.
doi:10.1007/s00339-004-2889-2 .

Milinović, Velimir, Bibić, Nataša M., Dhar, S, Šiljegović, Milorad, Schaaf, P, Lieb, KP, "Nitrogen irradiation of Fe/Si bilayers: nitride versus silicide phase formation" in Applied Physics. A: Materials Science and Processing, 79, no. 8 (2004):2093-2097,
https://doi.org/10.1007/s00339-004-2889-2 . .

TY  - JOUR
AU  - Bibić, Nataša M.
AU  - Milinović, Velimir
AU  - Dhar, S
AU  - Lieb, KP
AU  - Milosavljević, Momir
AU  - Šiljegović, Milorad
AU  - Peruško, Davor
AU  - Schaaf, P
PY  - 2004
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6451
AB  - This article reports on the formation of iron nitrides during nitrogen ion irradiation of Fe/Si bilayers at room temperature. The 30 nm Fe-57/Si bilayers were prepared by pulsed laser ablation and irradiated with 22 keV N2+ ions at fluences of (0.6-2)x 10(17) ions/cm(2). The structural changes and phases formed by irradiation were analyzed by Rutherford backscattering spectroscopy (RBS), X-ray diffraction analysis (XRD) and conversion electron Mossbauer spectroscopy (CEMS). The results clearly show the formation of several iron nitrides. At the lower fluences, the samples contain a mixture of epsilon-Fe2+x N and alpha-Fe with nitrogen interstitials. For the highest fluence, the paramagnetic epsilon-Fe-2 N (61%) phase predominated. It can be concluded that the elemental iron almost fully transforms to an iron-nitride layer, but that no iron silicides are formed. (C) 2003 Elsevier B.V. All rights reserved.
T2  - Thin Solid Films
T1  - Formation of iron-nitrides by irradiation of Fe-57/Si bilayers with N2+ ions
VL  - 459
IS  - 1-2
SP  - 23
EP  - 27
DO  - 10.1016/j.tsf.2003.12.077
ER  - 

@article{
author = "Bibić, Nataša M. and Milinović, Velimir and Dhar, S and Lieb, KP and Milosavljević, Momir and Šiljegović, Milorad and Peruško, Davor and Schaaf, P",
year = "2004",
abstract = "This article reports on the formation of iron nitrides during nitrogen ion irradiation of Fe/Si bilayers at room temperature. The 30 nm Fe-57/Si bilayers were prepared by pulsed laser ablation and irradiated with 22 keV N2+ ions at fluences of (0.6-2)x 10(17) ions/cm(2). The structural changes and phases formed by irradiation were analyzed by Rutherford backscattering spectroscopy (RBS), X-ray diffraction analysis (XRD) and conversion electron Mossbauer spectroscopy (CEMS). The results clearly show the formation of several iron nitrides. At the lower fluences, the samples contain a mixture of epsilon-Fe2+x N and alpha-Fe with nitrogen interstitials. For the highest fluence, the paramagnetic epsilon-Fe-2 N (61%) phase predominated. It can be concluded that the elemental iron almost fully transforms to an iron-nitride layer, but that no iron silicides are formed. (C) 2003 Elsevier B.V. All rights reserved.",
journal = "Thin Solid Films",
title = "Formation of iron-nitrides by irradiation of Fe-57/Si bilayers with N2+ ions",
volume = "459",
number = "1-2",
pages = "23-27",
doi = "10.1016/j.tsf.2003.12.077"
}

Bibić, N. M., Milinović, V., Dhar, S., Lieb, K., Milosavljević, M., Šiljegović, M., Peruško, D.,& Schaaf, P.. (2004). Formation of iron-nitrides by irradiation of Fe-57/Si bilayers with N2+ ions. in Thin Solid Films, 459(1-2), 23-27.
https://doi.org/10.1016/j.tsf.2003.12.077

Bibić NM, Milinović V, Dhar S, Lieb K, Milosavljević M, Šiljegović M, Peruško D, Schaaf P. Formation of iron-nitrides by irradiation of Fe-57/Si bilayers with N2+ ions. in Thin Solid Films. 2004;459(1-2):23-27.
doi:10.1016/j.tsf.2003.12.077 .

Bibić, Nataša M., Milinović, Velimir, Dhar, S, Lieb, KP, Milosavljević, Momir, Šiljegović, Milorad, Peruško, Davor, Schaaf, P, "Formation of iron-nitrides by irradiation of Fe-57/Si bilayers with N2+ ions" in Thin Solid Films, 459, no. 1-2 (2004):23-27,
https://doi.org/10.1016/j.tsf.2003.12.077 . .

TY  - JOUR
AU  - Dobrosavijevic, A
AU  - Šiljegović, Milorad
AU  - Draganic, I
AU  - Cizmic, B
PY  - 2004
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6445
AB  - The mVINIS ion source is a part of the TESLA Accelerator Installation, in Belgrade. It is an ECR ion source used as a stand-alone machine delivering multiply charged ion beams to a low energy experimental channel for modification of materials (the L3A channel). In the future, it will be also used as a heavy ion injector for the VINCY Cyclotron. In this article we present the recently introduced hardware and software changes resulting in an improved operation of the mVINIS: the emittance measurement system, the inlet system for precious gases, the improved control system of the microwave generator, a new power supply for the injection stage coil, and the improved program for recording and analysis of the ion beam spectra. (C) 2004 American Institute of Physics.
T2  - Review of Scientific Instruments
T1  - Recent results with the mVINIS ion source
VL  - 75
IS  - 5
SP  - 1460
EP  - 1462
DO  - 10.1063/1.1690461
ER  - 

@article{
author = "Dobrosavijevic, A and Šiljegović, Milorad and Draganic, I and Cizmic, B",
year = "2004",
abstract = "The mVINIS ion source is a part of the TESLA Accelerator Installation, in Belgrade. It is an ECR ion source used as a stand-alone machine delivering multiply charged ion beams to a low energy experimental channel for modification of materials (the L3A channel). In the future, it will be also used as a heavy ion injector for the VINCY Cyclotron. In this article we present the recently introduced hardware and software changes resulting in an improved operation of the mVINIS: the emittance measurement system, the inlet system for precious gases, the improved control system of the microwave generator, a new power supply for the injection stage coil, and the improved program for recording and analysis of the ion beam spectra. (C) 2004 American Institute of Physics.",
journal = "Review of Scientific Instruments",
title = "Recent results with the mVINIS ion source",
volume = "75",
number = "5",
pages = "1460-1462",
doi = "10.1063/1.1690461"
}

Dobrosavijevic, A., Šiljegović, M., Draganic, I.,& Cizmic, B.. (2004). Recent results with the mVINIS ion source. in Review of Scientific Instruments, 75(5), 1460-1462.
https://doi.org/10.1063/1.1690461

Dobrosavijevic A, Šiljegović M, Draganic I, Cizmic B. Recent results with the mVINIS ion source. in Review of Scientific Instruments. 2004;75(5):1460-1462.
doi:10.1063/1.1690461 .

Dobrosavijevic, A, Šiljegović, Milorad, Draganic, I, Cizmic, B, "Recent results with the mVINIS ion source" in Review of Scientific Instruments, 75, no. 5 (2004):1460-1462,
https://doi.org/10.1063/1.1690461 . .

TY  - JOUR
AU  - Šiljegović, Milorad
AU  - Dobrosavljević, Aleksandar S.
AU  - Beličev, Petar
PY  - 2004
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6446
AB  - The ion-optical properties of the single gap extraction system of the mVINIS ion source are investigated. The pepper-pot method was used to measure the effective emittances of the ion beams extracted from the plasma. The emittances have been analyzed as functions of the extraction electrode position for various charge states of the ion species. (C) 2004 American Institute of Physics.
T2  - Review of Scientific Instruments
T1  - Optimization of the mVINIS ion source extraction system
VL  - 75
IS  - 5
SP  - 1506
EP  - 1507
DO  - 10.1063/1.1691502
ER  - 

@article{
author = "Šiljegović, Milorad and Dobrosavljević, Aleksandar S. and Beličev, Petar",
year = "2004",
abstract = "The ion-optical properties of the single gap extraction system of the mVINIS ion source are investigated. The pepper-pot method was used to measure the effective emittances of the ion beams extracted from the plasma. The emittances have been analyzed as functions of the extraction electrode position for various charge states of the ion species. (C) 2004 American Institute of Physics.",
journal = "Review of Scientific Instruments",
title = "Optimization of the mVINIS ion source extraction system",
volume = "75",
number = "5",
pages = "1506-1507",
doi = "10.1063/1.1691502"
}

Šiljegović, M., Dobrosavljević, A. S.,& Beličev, P.. (2004). Optimization of the mVINIS ion source extraction system. in Review of Scientific Instruments, 75(5), 1506-1507.
https://doi.org/10.1063/1.1691502

Šiljegović M, Dobrosavljević AS, Beličev P. Optimization of the mVINIS ion source extraction system. in Review of Scientific Instruments. 2004;75(5):1506-1507.
doi:10.1063/1.1691502 .

Šiljegović, Milorad, Dobrosavljević, Aleksandar S., Beličev, Petar, "Optimization of the mVINIS ion source extraction system" in Review of Scientific Instruments, 75, no. 5 (2004):1506-1507,
https://doi.org/10.1063/1.1691502 . .

TY  - JOUR
AU  - Beličev, Petar
AU  - Šiljegović, Milorad
AU  - Dobrosavijevic, A
AU  - Keskovic, N
PY  - 2004
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6447
AB  - The channel for modification of materials (L3A) of the Tesla Accelerator Installation, in the Vinca Institute of Nuclear Sciences, connected to the mVINIS ion source, consists of an ion beam transport line and an interaction chamber enabling the ion beam assisted deposition. The 8.4 m long beam line, starting at an analyzing slit after an analyzing magnet, contains two electrostatic quadrupole triplet lenses: a 90degrees bending magnet and an electrostatic beam scanner. The maximal beam transmission coefficient, e.g., for 60 keV N4+ beam, has not exceeded 30%. At the time the beam line was designed, the mVINIS ion source was not commissioned, so that the emittances of the beams it delivered were underestimated. This is one of the reasons for the low transmission performance of the beam line. In this article the results of the beam line acceptance calculations are presented and compared with the measured beam emittances. The calculations are based on the transfer matrix formalism with no space charge taken into account. The suggestions for improving the beam transmission performance of the beam line are given. (C) 2004 American Institute of Physics.
T2  - Review of Scientific Instruments
T1  - Acceptance of the channel for modification of materials (L3A) of the Tesla accelerator installation
VL  - 75
IS  - 5
SP  - 1678
EP  - 1680
DO  - 10.1063/1.1695642
ER  - 

@article{
author = "Beličev, Petar and Šiljegović, Milorad and Dobrosavijevic, A and Keskovic, N",
year = "2004",
abstract = "The channel for modification of materials (L3A) of the Tesla Accelerator Installation, in the Vinca Institute of Nuclear Sciences, connected to the mVINIS ion source, consists of an ion beam transport line and an interaction chamber enabling the ion beam assisted deposition. The 8.4 m long beam line, starting at an analyzing slit after an analyzing magnet, contains two electrostatic quadrupole triplet lenses: a 90degrees bending magnet and an electrostatic beam scanner. The maximal beam transmission coefficient, e.g., for 60 keV N4+ beam, has not exceeded 30%. At the time the beam line was designed, the mVINIS ion source was not commissioned, so that the emittances of the beams it delivered were underestimated. This is one of the reasons for the low transmission performance of the beam line. In this article the results of the beam line acceptance calculations are presented and compared with the measured beam emittances. The calculations are based on the transfer matrix formalism with no space charge taken into account. The suggestions for improving the beam transmission performance of the beam line are given. (C) 2004 American Institute of Physics.",
journal = "Review of Scientific Instruments",
title = "Acceptance of the channel for modification of materials (L3A) of the Tesla accelerator installation",
volume = "75",
number = "5",
pages = "1678-1680",
doi = "10.1063/1.1695642"
}

Beličev, P., Šiljegović, M., Dobrosavijevic, A.,& Keskovic, N.. (2004). Acceptance of the channel for modification of materials (L3A) of the Tesla accelerator installation. in Review of Scientific Instruments, 75(5), 1678-1680.
https://doi.org/10.1063/1.1695642

Beličev P, Šiljegović M, Dobrosavijevic A, Keskovic N. Acceptance of the channel for modification of materials (L3A) of the Tesla accelerator installation. in Review of Scientific Instruments. 2004;75(5):1678-1680.
doi:10.1063/1.1695642 .

Beličev, Petar, Šiljegović, Milorad, Dobrosavijevic, A, Keskovic, N, "Acceptance of the channel for modification of materials (L3A) of the Tesla accelerator installation" in Review of Scientific Instruments, 75, no. 5 (2004):1678-1680,
https://doi.org/10.1063/1.1695642 . .