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 . .