TY  - JOUR
AU  - Tekin (Ekdal), E.
AU  - Ege, A.
AU  - Karali, Turgay
AU  - Townsend, P. D.
AU  - Prokić, Miloš
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4036
AB  - Borate based thermoluminescence dosimeters (TLD) show high sensitivity and good TL characteristics. One of the promising material amongst the dosimeters is Dy doped CaB4O7. Spectrally resolved thermoluminescence of Dy doped CaB4O7 shows three glow peaks at about 50 degrees C, 240 degrees C and 380 degrees C, the intensity of the 240 degrees C glow peak being the maximum. All TL experiments were conducted on a high sensitivity TL spectrometer at Sussex University with a heating rate of 50 degrees C min(-1). Two main emissions associated with the Dy dopant are observed at similar to 480 and 580 nm. The samples were subjected to a series of treatments including excitation by X-rays and UV laser radiation. As part of the present research CaB4O7:Dy materials were subjected to two different heat treatments; quenching and slow cooling in order to investigate the changes in TL characteristics. (C) 2010 Elsevier Ltd. All rights reserved.
T2  - Radiation Measurements
T1  - Thermoluminescence studies of thermally treated CaB4O7:Dy
VL  - 45
IS  - 7
SP  - 764
EP  - 767
DO  - 10.1016/j.radmeas.2010.04.009
ER  - 

@article{
author = "Tekin (Ekdal), E. and Ege, A. and Karali, Turgay and Townsend, P. D. and Prokić, Miloš",
year = "2010",
abstract = "Borate based thermoluminescence dosimeters (TLD) show high sensitivity and good TL characteristics. One of the promising material amongst the dosimeters is Dy doped CaB4O7. Spectrally resolved thermoluminescence of Dy doped CaB4O7 shows three glow peaks at about 50 degrees C, 240 degrees C and 380 degrees C, the intensity of the 240 degrees C glow peak being the maximum. All TL experiments were conducted on a high sensitivity TL spectrometer at Sussex University with a heating rate of 50 degrees C min(-1). Two main emissions associated with the Dy dopant are observed at similar to 480 and 580 nm. The samples were subjected to a series of treatments including excitation by X-rays and UV laser radiation. As part of the present research CaB4O7:Dy materials were subjected to two different heat treatments; quenching and slow cooling in order to investigate the changes in TL characteristics. (C) 2010 Elsevier Ltd. All rights reserved.",
journal = "Radiation Measurements",
title = "Thermoluminescence studies of thermally treated CaB4O7:Dy",
volume = "45",
number = "7",
pages = "764-767",
doi = "10.1016/j.radmeas.2010.04.009"
}

Tekin (Ekdal), E., Ege, A., Karali, T., Townsend, P. D.,& Prokić, M.. (2010). Thermoluminescence studies of thermally treated CaB4O7:Dy. in Radiation Measurements, 45(7), 764-767.
https://doi.org/10.1016/j.radmeas.2010.04.009

Tekin (Ekdal) E, Ege A, Karali T, Townsend PD, Prokić M. Thermoluminescence studies of thermally treated CaB4O7:Dy. in Radiation Measurements. 2010;45(7):764-767.
doi:10.1016/j.radmeas.2010.04.009 .

Tekin (Ekdal), E., Ege, A., Karali, Turgay, Townsend, P. D., Prokić, Miloš, "Thermoluminescence studies of thermally treated CaB4O7:Dy" in Radiation Measurements, 45, no. 7 (2010):764-767,
https://doi.org/10.1016/j.radmeas.2010.04.009 . .

TY  - CONF
AU  - Can, N.
AU  - Karali, Turgay
AU  - Wang, Y.
AU  - Townsend, P. D.
AU  - Prokić, Miloš
AU  - Canimoglu, A.
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6832
AB  - Rare earths, especially Dy or Tm doped CaSO4 phosphors are actively studied. They have high sensitivity, a large dynamic range, thermal stability and ease of preparation. Nevertheless, they can be enhanced by inclusion of lithium and this study reports some effects of lithium co-dopant on the TL and radioluminescence (RL) emissions of two TL phosphors. Addition of Li as a co-dopant ion was made either during chemical preparation of the phosphors, or as a binder component mixed with the basic phosphors matrix during the process of pressing and sintering the TLD pellets.
C3  - Physics Procedia
T1  - Room and Low Temperature Luminescence Properties of CaSO4:Dy,Tm Codoped with Li
VL  - 2
IS  - 2
SP  - 459
EP  - 466
DO  - 10.1016/j.phpro.2009.07.031
ER  - 

@conference{
author = "Can, N. and Karali, Turgay and Wang, Y. and Townsend, P. D. and Prokić, Miloš and Canimoglu, A.",
year = "2009",
abstract = "Rare earths, especially Dy or Tm doped CaSO4 phosphors are actively studied. They have high sensitivity, a large dynamic range, thermal stability and ease of preparation. Nevertheless, they can be enhanced by inclusion of lithium and this study reports some effects of lithium co-dopant on the TL and radioluminescence (RL) emissions of two TL phosphors. Addition of Li as a co-dopant ion was made either during chemical preparation of the phosphors, or as a binder component mixed with the basic phosphors matrix during the process of pressing and sintering the TLD pellets.",
journal = "Physics Procedia",
title = "Room and Low Temperature Luminescence Properties of CaSO4:Dy,Tm Codoped with Li",
volume = "2",
number = "2",
pages = "459-466",
doi = "10.1016/j.phpro.2009.07.031"
}

Can, N., Karali, T., Wang, Y., Townsend, P. D., Prokić, M.,& Canimoglu, A.. (2009). Room and Low Temperature Luminescence Properties of CaSO4:Dy,Tm Codoped with Li. in Physics Procedia, 2(2), 459-466.
https://doi.org/10.1016/j.phpro.2009.07.031

Can N, Karali T, Wang Y, Townsend PD, Prokić M, Canimoglu A. Room and Low Temperature Luminescence Properties of CaSO4:Dy,Tm Codoped with Li. in Physics Procedia. 2009;2(2):459-466.
doi:10.1016/j.phpro.2009.07.031 .

Can, N., Karali, Turgay, Wang, Y., Townsend, P. D., Prokić, Miloš, Canimoglu, A., "Room and Low Temperature Luminescence Properties of CaSO4:Dy,Tm Codoped with Li" in Physics Procedia, 2, no. 2 (2009):459-466,
https://doi.org/10.1016/j.phpro.2009.07.031 . .

TY  - JOUR
AU  - Goekce, M.
AU  - Oguz, K. F.
AU  - Karali, Turgay
AU  - Prokić, Miloš
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3684
AB  - In this paper the influence of different heating rates on thermoluminescence (TL) kinetics, glow-peak temperatures, heights and integrated TL intensities of the main glow peak of recently produced Mg2SiO4 : Tb dosimeters are reported. The TL properties of the phosphor were investigated after beta-irradiation at room temperature. Glow curve shape, peak shape, repeated initial rise and variable heating rate methods were used to analyse the TL kinetics of the main glow peak at 473 K. Results show that the TL glow peak of Mg2SiO4 : Tb phosphor obeys second-order kinetics. Analysis of the main dosimetric peak by using the methods mentioned above revealed that activation energy (E) is about 1 eV and the pre-exponential factor (s) is in the range 10(10)-10(11) s(-1). In addition it is ascertained that the glow-peak temperature increases with heating rate. The glow-peak height showed two maxima in the heating rate range investigated. The behaviour of the integrated TL intensities and the maximum glow-peak temperatures related to the heating rate have been discussed in terms of thermal quenching and clustering formation.
T2  - Journal of Physics. D: Applied Physics
T1  - Influence of heating rate on thermoluminescence of Mg2SiO4 : Tb dosimeter
VL  - 42
IS  - 10
DO  - 10.1088/0022-3727/42/10/105412
ER  - 

@article{
author = "Goekce, M. and Oguz, K. F. and Karali, Turgay and Prokić, Miloš",
year = "2009",
abstract = "In this paper the influence of different heating rates on thermoluminescence (TL) kinetics, glow-peak temperatures, heights and integrated TL intensities of the main glow peak of recently produced Mg2SiO4 : Tb dosimeters are reported. The TL properties of the phosphor were investigated after beta-irradiation at room temperature. Glow curve shape, peak shape, repeated initial rise and variable heating rate methods were used to analyse the TL kinetics of the main glow peak at 473 K. Results show that the TL glow peak of Mg2SiO4 : Tb phosphor obeys second-order kinetics. Analysis of the main dosimetric peak by using the methods mentioned above revealed that activation energy (E) is about 1 eV and the pre-exponential factor (s) is in the range 10(10)-10(11) s(-1). In addition it is ascertained that the glow-peak temperature increases with heating rate. The glow-peak height showed two maxima in the heating rate range investigated. The behaviour of the integrated TL intensities and the maximum glow-peak temperatures related to the heating rate have been discussed in terms of thermal quenching and clustering formation.",
journal = "Journal of Physics. D: Applied Physics",
title = "Influence of heating rate on thermoluminescence of Mg2SiO4 : Tb dosimeter",
volume = "42",
number = "10",
doi = "10.1088/0022-3727/42/10/105412"
}

Goekce, M., Oguz, K. F., Karali, T.,& Prokić, M.. (2009). Influence of heating rate on thermoluminescence of Mg2SiO4 : Tb dosimeter. in Journal of Physics. D: Applied Physics, 42(10).
https://doi.org/10.1088/0022-3727/42/10/105412

Goekce M, Oguz KF, Karali T, Prokić M. Influence of heating rate on thermoluminescence of Mg2SiO4 : Tb dosimeter. in Journal of Physics. D: Applied Physics. 2009;42(10).
doi:10.1088/0022-3727/42/10/105412 .

Goekce, M., Oguz, K. F., Karali, Turgay, Prokić, Miloš, "Influence of heating rate on thermoluminescence of Mg2SiO4 : Tb dosimeter" in Journal of Physics. D: Applied Physics, 42, no. 10 (2009),
https://doi.org/10.1088/0022-3727/42/10/105412 . .

TY  - JOUR
AU  - Ege, A. (Turkler)
AU  - Tekin, E. (Ekdal)
AU  - Karali, Turgay
AU  - Can, N.
AU  - Prokić, Miloš
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3678
AB  - We appreciate the opportunity to respond to comments regarding the paper published by Ege et al (2007 Effect of heating rate on kinetic parameters of beta-irradiated Li2B4O7: Cu, Ag, P in TSL measurements Meas. Sci. Technol. 18 889). We would like to thank the authors for taking the time to tell us about their opinion, but unfortunately we do not agree with them completely. In the article presented by Kumar and Chourasiya some comment is advanced to the analysis of the glow curves measured with different heating rates, presented in our recent study. According to our study, the area under the glow curve decreases with increasing heating rate in TL-temperature plots due to the quenching effects. Contrary to this, Kumar and Chourasiya suggest that this decrease is due to the normalization process. Here we hope to clarify any confusion regarding our published study.
T2  - Measurement Science and Technology
T1  - Reply to Comments on Effect of heating rate on kinetic parameters of beta-irradiated Li2B4O7:Cu,Ag,P in TSL measurements
VL  - 20
IS  - 5
DO  - 10.1088/0957-0233/20/5/058002
ER  - 

@article{
author = "Ege, A. (Turkler) and Tekin, E. (Ekdal) and Karali, Turgay and Can, N. and Prokić, Miloš",
year = "2009",
abstract = "We appreciate the opportunity to respond to comments regarding the paper published by Ege et al (2007 Effect of heating rate on kinetic parameters of beta-irradiated Li2B4O7: Cu, Ag, P in TSL measurements Meas. Sci. Technol. 18 889). We would like to thank the authors for taking the time to tell us about their opinion, but unfortunately we do not agree with them completely. In the article presented by Kumar and Chourasiya some comment is advanced to the analysis of the glow curves measured with different heating rates, presented in our recent study. According to our study, the area under the glow curve decreases with increasing heating rate in TL-temperature plots due to the quenching effects. Contrary to this, Kumar and Chourasiya suggest that this decrease is due to the normalization process. Here we hope to clarify any confusion regarding our published study.",
journal = "Measurement Science and Technology",
title = "Reply to Comments on Effect of heating rate on kinetic parameters of beta-irradiated Li2B4O7:Cu,Ag,P in TSL measurements",
volume = "20",
number = "5",
doi = "10.1088/0957-0233/20/5/058002"
}

Ege, A. (., Tekin, E. (., Karali, T., Can, N.,& Prokić, M.. (2009). Reply to Comments on Effect of heating rate on kinetic parameters of beta-irradiated Li2B4O7:Cu,Ag,P in TSL measurements. in Measurement Science and Technology, 20(5).
https://doi.org/10.1088/0957-0233/20/5/058002

Ege A(, Tekin E(, Karali T, Can N, Prokić M. Reply to Comments on Effect of heating rate on kinetic parameters of beta-irradiated Li2B4O7:Cu,Ag,P in TSL measurements. in Measurement Science and Technology. 2009;20(5).
doi:10.1088/0957-0233/20/5/058002 .

Ege, A. (Turkler), Tekin, E. (Ekdal), Karali, Turgay, Can, N., Prokić, Miloš, "Reply to Comments on Effect of heating rate on kinetic parameters of beta-irradiated Li2B4O7:Cu,Ag,P in TSL measurements" in Measurement Science and Technology, 20, no. 5 (2009),
https://doi.org/10.1088/0957-0233/20/5/058002 . .

TY  - JOUR
AU  - Ege, A. (Turkler)
AU  - Ekdal, E.
AU  - Karali, Turgay
AU  - Can, N.
AU  - Prokić, Miloš
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3167
AB  - The effect of heating rate on the thermally stimulated luminescence (TSL) emission due to the temperature lag (TLA) between the TSL material and the heating element has been investigated using Li2B4O7:Cu,Ag,P dosimetric materials. The TLA becomes significant when the material is heated at high heating rates. TSL glow curves of Li2B4O7:Cu,Ag,P material showed two main peaks after beta-irradiation. The kinetic parameters, namely activation energy (E) and frequency factor (s) associated with the high temperature main peak of Li2B4O7:Cu,Ag,P were determined using the method of various heating rates (VHR), in which heating rates from 1 to 40 K s(-1) were used. It is assumed that non-ideal heat transfer between the heater and the material may cause significant inconsistency of kinetic parameter values obtained with different methods. The effect of TLA on kinetic parameters of the dosimeter was examined.
T2  - Measurement Science and Technology
T1  - Effect of heating rate on kinetic parameters of beta-irradiated Li2B4O7 : Cu,Ag,P in TSL measurments
VL  - 18
IS  - 3
SP  - 889
EP  - 892
DO  - 10.1088/0957-0233/18/3/043
ER  - 

@article{
author = "Ege, A. (Turkler) and Ekdal, E. and Karali, Turgay and Can, N. and Prokić, Miloš",
year = "2007",
abstract = "The effect of heating rate on the thermally stimulated luminescence (TSL) emission due to the temperature lag (TLA) between the TSL material and the heating element has been investigated using Li2B4O7:Cu,Ag,P dosimetric materials. The TLA becomes significant when the material is heated at high heating rates. TSL glow curves of Li2B4O7:Cu,Ag,P material showed two main peaks after beta-irradiation. The kinetic parameters, namely activation energy (E) and frequency factor (s) associated with the high temperature main peak of Li2B4O7:Cu,Ag,P were determined using the method of various heating rates (VHR), in which heating rates from 1 to 40 K s(-1) were used. It is assumed that non-ideal heat transfer between the heater and the material may cause significant inconsistency of kinetic parameter values obtained with different methods. The effect of TLA on kinetic parameters of the dosimeter was examined.",
journal = "Measurement Science and Technology",
title = "Effect of heating rate on kinetic parameters of beta-irradiated Li2B4O7 : Cu,Ag,P in TSL measurments",
volume = "18",
number = "3",
pages = "889-892",
doi = "10.1088/0957-0233/18/3/043"
}

Ege, A. (., Ekdal, E., Karali, T., Can, N.,& Prokić, M.. (2007). Effect of heating rate on kinetic parameters of beta-irradiated Li2B4O7 : Cu,Ag,P in TSL measurments. in Measurement Science and Technology, 18(3), 889-892.
https://doi.org/10.1088/0957-0233/18/3/043

Ege A(, Ekdal E, Karali T, Can N, Prokić M. Effect of heating rate on kinetic parameters of beta-irradiated Li2B4O7 : Cu,Ag,P in TSL measurments. in Measurement Science and Technology. 2007;18(3):889-892.
doi:10.1088/0957-0233/18/3/043 .

Ege, A. (Turkler), Ekdal, E., Karali, Turgay, Can, N., Prokić, Miloš, "Effect of heating rate on kinetic parameters of beta-irradiated Li2B4O7 : Cu,Ag,P in TSL measurments" in Measurement Science and Technology, 18, no. 3 (2007):889-892,
https://doi.org/10.1088/0957-0233/18/3/043 . .

TY  - JOUR
AU  - Karsu, EC
AU  - Gokce, M
AU  - Ege, A
AU  - Karali, Turgay
AU  - Can, N
AU  - Prokić, Mirjana S.
PY  - 2006
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3015
AB  - Dosimeters of MgB4O7 doped with Dy and Na have many valuable features such as high sensitivity, tissue equivalence, low fading, non-requirement of annealing and insensitivity to light. Thermoluminescence studies of Dy and Na doped MgB4O7 samples showed that a glow emission peaked at about 195 degrees C. In this study, the trapping parameters associated with the main dosimetric peak, namely at 195 degrees C, of Dy and Na doped MgB4O7 are investigated. Isothermal luminescence decay, glow curve shape, initial rise (linear regression) and T-m - T-stop methods were used. We report the results on the kinetic behaviour and activation energy determination of the peak occurring at 195 degrees C with a moderate heating rate of 2 degrees C s(-1). The average activation energies obtained by the isothermal luminescence decay method, glow curve shape method and initial rise method are calculated to be 1.03 eV, 0.95 eV and 0.89 eV, respectively. The methods mentioned above indicate that the dosimetric peak may consist of one or more second-order components. The frequency factors obtained by the three methods are 3.5 x 10(10) s(-1), 1.6 x 10(9) s(-1) and 3.4 x 10(8) s(-1),respectively. Results obtained using all these methods are compared and discussed.
T2  - Journal of Physics. D: Applied Physics
T1  - Kinetic characterization of MgB4O7 : Dy,Na thermoluminescent phosphor
VL  - 39
IS  - 8
SP  - 1485
EP  - 1488
DO  - 10.1088/0022-3727/39/8/005
ER  - 

@article{
author = "Karsu, EC and Gokce, M and Ege, A and Karali, Turgay and Can, N and Prokić, Mirjana S.",
year = "2006",
abstract = "Dosimeters of MgB4O7 doped with Dy and Na have many valuable features such as high sensitivity, tissue equivalence, low fading, non-requirement of annealing and insensitivity to light. Thermoluminescence studies of Dy and Na doped MgB4O7 samples showed that a glow emission peaked at about 195 degrees C. In this study, the trapping parameters associated with the main dosimetric peak, namely at 195 degrees C, of Dy and Na doped MgB4O7 are investigated. Isothermal luminescence decay, glow curve shape, initial rise (linear regression) and T-m - T-stop methods were used. We report the results on the kinetic behaviour and activation energy determination of the peak occurring at 195 degrees C with a moderate heating rate of 2 degrees C s(-1). The average activation energies obtained by the isothermal luminescence decay method, glow curve shape method and initial rise method are calculated to be 1.03 eV, 0.95 eV and 0.89 eV, respectively. The methods mentioned above indicate that the dosimetric peak may consist of one or more second-order components. The frequency factors obtained by the three methods are 3.5 x 10(10) s(-1), 1.6 x 10(9) s(-1) and 3.4 x 10(8) s(-1),respectively. Results obtained using all these methods are compared and discussed.",
journal = "Journal of Physics. D: Applied Physics",
title = "Kinetic characterization of MgB4O7 : Dy,Na thermoluminescent phosphor",
volume = "39",
number = "8",
pages = "1485-1488",
doi = "10.1088/0022-3727/39/8/005"
}

Karsu, E., Gokce, M., Ege, A., Karali, T., Can, N.,& Prokić, M. S.. (2006). Kinetic characterization of MgB4O7 : Dy,Na thermoluminescent phosphor. in Journal of Physics. D: Applied Physics, 39(8), 1485-1488.
https://doi.org/10.1088/0022-3727/39/8/005

Karsu E, Gokce M, Ege A, Karali T, Can N, Prokić MS. Kinetic characterization of MgB4O7 : Dy,Na thermoluminescent phosphor. in Journal of Physics. D: Applied Physics. 2006;39(8):1485-1488.
doi:10.1088/0022-3727/39/8/005 .

Karsu, EC, Gokce, M, Ege, A, Karali, Turgay, Can, N, Prokić, Mirjana S., "Kinetic characterization of MgB4O7 : Dy,Na thermoluminescent phosphor" in Journal of Physics. D: Applied Physics, 39, no. 8 (2006):1485-1488,
https://doi.org/10.1088/0022-3727/39/8/005 . .

TY  - JOUR
AU  - Karali, Turgay
AU  - Rowlands, Aled P.
AU  - Prokić, Mirjana S.
AU  - Townsend, Peter David
AU  - Halmagean, E
PY  - 2002
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6341
AB  - This paper presents X ray excited TL spectra of magnesium borate doped with either single rare earth ions Dy or Tin, or co-doped with Dy/Tm, Tm/Mn or Dy/Tb. Intrinsic emission from the host material is in the UV/blue region at similar to375 nm, with a tail extending to 200 nm. The main dosimetric peak is detected at similar to180degreesC but slight differences are noted between the glow peak maxima from the different rare earth ions and there were changes following thermal treatments. The results are discussed according to the interaction between trapping and rare earth sites.
T2  - Radiation Protection Dosimetry
T1  - Thermoluminescent spectra of rare earth doped MgB4O7 dosemeters
VL  - 100
IS  - 1-4
SP  - 333
EP  - 336
DO  - 10.1093/oxfordjournals.rpd.a005882
ER  - 

@article{
author = "Karali, Turgay and Rowlands, Aled P. and Prokić, Mirjana S. and Townsend, Peter David and Halmagean, E",
year = "2002",
abstract = "This paper presents X ray excited TL spectra of magnesium borate doped with either single rare earth ions Dy or Tin, or co-doped with Dy/Tm, Tm/Mn or Dy/Tb. Intrinsic emission from the host material is in the UV/blue region at similar to375 nm, with a tail extending to 200 nm. The main dosimetric peak is detected at similar to180degreesC but slight differences are noted between the glow peak maxima from the different rare earth ions and there were changes following thermal treatments. The results are discussed according to the interaction between trapping and rare earth sites.",
journal = "Radiation Protection Dosimetry",
title = "Thermoluminescent spectra of rare earth doped MgB4O7 dosemeters",
volume = "100",
number = "1-4",
pages = "333-336",
doi = "10.1093/oxfordjournals.rpd.a005882"
}

Karali, T., Rowlands, A. P., Prokić, M. S., Townsend, P. D.,& Halmagean, E.. (2002). Thermoluminescent spectra of rare earth doped MgB4O7 dosemeters. in Radiation Protection Dosimetry, 100(1-4), 333-336.
https://doi.org/10.1093/oxfordjournals.rpd.a005882

Karali T, Rowlands AP, Prokić MS, Townsend PD, Halmagean E. Thermoluminescent spectra of rare earth doped MgB4O7 dosemeters. in Radiation Protection Dosimetry. 2002;100(1-4):333-336.
doi:10.1093/oxfordjournals.rpd.a005882 .

Karali, Turgay, Rowlands, Aled P., Prokić, Mirjana S., Townsend, Peter David, Halmagean, E, "Thermoluminescent spectra of rare earth doped MgB4O7 dosemeters" in Radiation Protection Dosimetry, 100, no. 1-4 (2002):333-336,
https://doi.org/10.1093/oxfordjournals.rpd.a005882 . .

TY  - JOUR
AU  - Karali, Turgay
AU  - Townsend, Peter David
AU  - Prokić, Mirjana S.
AU  - Rowlands, Aled P.
PY  - 1999
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6275
AB  - Wavelength resolved spectra of the dosimetric materials CaSO4 and MgB4O7 with the rare earth (RE) ions Dy and Tm are presented. The study of co-doped samples provides, within a single sample, unequivocal evidence of a glow peak displacement of the two dopants. In the case of the main dosimetric peak for CaSO4 at similar to 220 degrees C, a reproducible systematic temperature difference of 7 to 8 degrees C is observed between the glow peaks near 230 to 240 degrees C for Tm and Dy. No comparable displacement is detected between Tm and Dy for the main dosimetric peak for MgB4O7 at about 180 degrees C. However, higher temperature glow peaks above 300 degrees C display a noticeable displacement of Dy and Tm on the scale of 30 degrees C. This research provides further evidence supporting the view that the RE ions could form part of a complex defect acting as both charge trap and recombination centre.
T2  - Radiation Protection Dosimetry
T1  - Comparison of TL spectra of co-doped dosimetric materials
VL  - 84
IS  - 1-4
SP  - 281
EP  - 284
DO  - 10.1093/oxfordjournals.rpd.a032738
ER  - 

@article{
author = "Karali, Turgay and Townsend, Peter David and Prokić, Mirjana S. and Rowlands, Aled P.",
year = "1999",
abstract = "Wavelength resolved spectra of the dosimetric materials CaSO4 and MgB4O7 with the rare earth (RE) ions Dy and Tm are presented. The study of co-doped samples provides, within a single sample, unequivocal evidence of a glow peak displacement of the two dopants. In the case of the main dosimetric peak for CaSO4 at similar to 220 degrees C, a reproducible systematic temperature difference of 7 to 8 degrees C is observed between the glow peaks near 230 to 240 degrees C for Tm and Dy. No comparable displacement is detected between Tm and Dy for the main dosimetric peak for MgB4O7 at about 180 degrees C. However, higher temperature glow peaks above 300 degrees C display a noticeable displacement of Dy and Tm on the scale of 30 degrees C. This research provides further evidence supporting the view that the RE ions could form part of a complex defect acting as both charge trap and recombination centre.",
journal = "Radiation Protection Dosimetry",
title = "Comparison of TL spectra of co-doped dosimetric materials",
volume = "84",
number = "1-4",
pages = "281-284",
doi = "10.1093/oxfordjournals.rpd.a032738"
}

Karali, T., Townsend, P. D., Prokić, M. S.,& Rowlands, A. P.. (1999). Comparison of TL spectra of co-doped dosimetric materials. in Radiation Protection Dosimetry, 84(1-4), 281-284.
https://doi.org/10.1093/oxfordjournals.rpd.a032738

Karali T, Townsend PD, Prokić MS, Rowlands AP. Comparison of TL spectra of co-doped dosimetric materials. in Radiation Protection Dosimetry. 1999;84(1-4):281-284.
doi:10.1093/oxfordjournals.rpd.a032738 .

Karali, Turgay, Townsend, Peter David, Prokić, Mirjana S., Rowlands, Aled P., "Comparison of TL spectra of co-doped dosimetric materials" in Radiation Protection Dosimetry, 84, no. 1-4 (1999):281-284,
https://doi.org/10.1093/oxfordjournals.rpd.a032738 . .

TY  - JOUR
AU  - Karali, Turgay
AU  - Rowlands, Aled P.
AU  - Townsend, Peter David
AU  - Prokić, Mirjana S.
AU  - Olivares, Jose
PY  - 1998
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2126
AB  - Spectrally resolved thermoluminescence of co-doped Dy:Tm:CaSO4 shows that the maximum peak temperature far the nominal 220 degrees C dosimetry peak differs by similar to 8 degrees C for Dy and Tm emission. This is interpreted as evidence that the rare earth ions farm part of a complex defect which variously provides both the charge trapping and, during heating, the radiative decay. The peaks have the same activation energies but different pre-exponential factors. Modifications of the material by thermal treatments using furnace or laser pulse heating convert the state of dispersion of the rare earth ions between isolated, pair or defect clusters, which alter the dosimetry efficiency. In some cases the modified geometries are detectable via movement of the emission lines. For rapidly quenched materials, discontinuities in the thermoluminescence responses are suggested to be indicative of new microcrystalline phases. Slow cooling degrades the efficiency but also indicates the presence of further thermoluminescence glow peaks within the region of the main dosimetry signal, Pulsed laser heating with a UV laser altered the glow curve and resulted in strong signals. Mechanisms for this process are considered.
T2  - Journal of Physics. D: Applied Physics
T1  - Spectral comparison of Dy, Tm and Dy/Tm in CaSO4 thermoluminescent dosimeters
VL  - 31
IS  - 6
SP  - 754
EP  - 765
DO  - 10.1088/0022-3727/31/6/025
ER  - 

@article{
author = "Karali, Turgay and Rowlands, Aled P. and Townsend, Peter David and Prokić, Mirjana S. and Olivares, Jose",
year = "1998",
abstract = "Spectrally resolved thermoluminescence of co-doped Dy:Tm:CaSO4 shows that the maximum peak temperature far the nominal 220 degrees C dosimetry peak differs by similar to 8 degrees C for Dy and Tm emission. This is interpreted as evidence that the rare earth ions farm part of a complex defect which variously provides both the charge trapping and, during heating, the radiative decay. The peaks have the same activation energies but different pre-exponential factors. Modifications of the material by thermal treatments using furnace or laser pulse heating convert the state of dispersion of the rare earth ions between isolated, pair or defect clusters, which alter the dosimetry efficiency. In some cases the modified geometries are detectable via movement of the emission lines. For rapidly quenched materials, discontinuities in the thermoluminescence responses are suggested to be indicative of new microcrystalline phases. Slow cooling degrades the efficiency but also indicates the presence of further thermoluminescence glow peaks within the region of the main dosimetry signal, Pulsed laser heating with a UV laser altered the glow curve and resulted in strong signals. Mechanisms for this process are considered.",
journal = "Journal of Physics. D: Applied Physics",
title = "Spectral comparison of Dy, Tm and Dy/Tm in CaSO4 thermoluminescent dosimeters",
volume = "31",
number = "6",
pages = "754-765",
doi = "10.1088/0022-3727/31/6/025"
}

Karali, T., Rowlands, A. P., Townsend, P. D., Prokić, M. S.,& Olivares, J.. (1998). Spectral comparison of Dy, Tm and Dy/Tm in CaSO4 thermoluminescent dosimeters. in Journal of Physics. D: Applied Physics, 31(6), 754-765.
https://doi.org/10.1088/0022-3727/31/6/025

Karali T, Rowlands AP, Townsend PD, Prokić MS, Olivares J. Spectral comparison of Dy, Tm and Dy/Tm in CaSO4 thermoluminescent dosimeters. in Journal of Physics. D: Applied Physics. 1998;31(6):754-765.
doi:10.1088/0022-3727/31/6/025 .

Karali, Turgay, Rowlands, Aled P., Townsend, Peter David, Prokić, Mirjana S., Olivares, Jose, "Spectral comparison of Dy, Tm and Dy/Tm in CaSO4 thermoluminescent dosimeters" in Journal of Physics. D: Applied Physics, 31, no. 6 (1998):754-765,
https://doi.org/10.1088/0022-3727/31/6/025 . .