The Dependence of Thermoluminescence Sensitivity Upon the Temperature of Irradiation in Meteorites and in Terrestrial Apatites
Abstract Measurements are reported on the TL sensitivity (i.e. TL glow output per unit ? ray test dose) of meteoritic specimens as well as terrestrial fluor- and chlor-apatites, as a function of irradiation temperature (Tirr). The irradiation temperatures ranged from liquid nitrogen to room temperat...
Published in: | Radiation Protection Dosimetry |
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Language: | English |
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Oxford University Press (OUP)
1990
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Online Access: | http://dx.doi.org/10.1093/oxfordjournals.rpd.a080757 https://academic.oup.com/rpd/article-pdf/33/1-4/55/47981942/rpd_33_1-4_55.pdf |
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croxfordunivpr:10.1093/oxfordjournals.rpd.a080757 2023-05-15T14:10:23+02:00 The Dependence of Thermoluminescence Sensitivity Upon the Temperature of Irradiation in Meteorites and in Terrestrial Apatites Durrani, S.A. Al-Khalifa, I.J.M. 1990 http://dx.doi.org/10.1093/oxfordjournals.rpd.a080757 https://academic.oup.com/rpd/article-pdf/33/1-4/55/47981942/rpd_33_1-4_55.pdf en eng Oxford University Press (OUP) Radiation Protection Dosimetry volume 33, issue 1-4, page 55-58 ISSN 1742-3406 0144-8420 Public Health, Environmental and Occupational Health Radiology, Nuclear Medicine and imaging General Medicine Radiation Radiological and Ultrasound Technology journal-article 1990 croxfordunivpr https://doi.org/10.1093/oxfordjournals.rpd.a080757 2022-12-29T15:30:23Z Abstract Measurements are reported on the TL sensitivity (i.e. TL glow output per unit ? ray test dose) of meteoritic specimens as well as terrestrial fluor- and chlor-apatites, as a function of irradiation temperature (Tirr). The irradiation temperatures ranged from liquid nitrogen to room temperature (77 - 293 K). A kilocurie 60Co ? ray source was used to deliver test doses of 400 Gy (40 krad) and 40 Gy (4 krad) to the various samples. A strong dependence of the TL sensitivity upon the temperature of irradiation was noted in the case of Kirin meteorite: its TL sensitivity (for the 493 K readout peak) decreased by a factor of ~2 when Tirr rose from liquid nitrogen (77 K) to dry ice in acetone (197 K) temperature, in the case of both 400 Gy and 40 Gy ? ray doses. In the case of the Antarctic meteorite specimen (ALHA 77182,13), there was a smaller effect, viz. a fall of ~14% in the TL output corresponding to dry ice and higher irradiating temperatures as compared to the 77 K irradiation. For chlorapatite, the TL sensitivity decreased monotonically with increasing temperature for both the 563 K and the 448 K glow peaks. For the fluorapatite, the effect of reduced response was observed only between -17 oC (256 K) and room temperature (293 K). Both the theoretical and the practical implications of these observations are discussed. Article in Journal/Newspaper Antarc* Antarctic Oxford University Press (via Crossref) Antarctic The Antarctic Radiation Protection Dosimetry 33 1-4 55 58 |
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Open Polar |
collection |
Oxford University Press (via Crossref) |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Public Health, Environmental and Occupational Health Radiology, Nuclear Medicine and imaging General Medicine Radiation Radiological and Ultrasound Technology |
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Public Health, Environmental and Occupational Health Radiology, Nuclear Medicine and imaging General Medicine Radiation Radiological and Ultrasound Technology Durrani, S.A. Al-Khalifa, I.J.M. The Dependence of Thermoluminescence Sensitivity Upon the Temperature of Irradiation in Meteorites and in Terrestrial Apatites |
topic_facet |
Public Health, Environmental and Occupational Health Radiology, Nuclear Medicine and imaging General Medicine Radiation Radiological and Ultrasound Technology |
description |
Abstract Measurements are reported on the TL sensitivity (i.e. TL glow output per unit ? ray test dose) of meteoritic specimens as well as terrestrial fluor- and chlor-apatites, as a function of irradiation temperature (Tirr). The irradiation temperatures ranged from liquid nitrogen to room temperature (77 - 293 K). A kilocurie 60Co ? ray source was used to deliver test doses of 400 Gy (40 krad) and 40 Gy (4 krad) to the various samples. A strong dependence of the TL sensitivity upon the temperature of irradiation was noted in the case of Kirin meteorite: its TL sensitivity (for the 493 K readout peak) decreased by a factor of ~2 when Tirr rose from liquid nitrogen (77 K) to dry ice in acetone (197 K) temperature, in the case of both 400 Gy and 40 Gy ? ray doses. In the case of the Antarctic meteorite specimen (ALHA 77182,13), there was a smaller effect, viz. a fall of ~14% in the TL output corresponding to dry ice and higher irradiating temperatures as compared to the 77 K irradiation. For chlorapatite, the TL sensitivity decreased monotonically with increasing temperature for both the 563 K and the 448 K glow peaks. For the fluorapatite, the effect of reduced response was observed only between -17 oC (256 K) and room temperature (293 K). Both the theoretical and the practical implications of these observations are discussed. |
format |
Article in Journal/Newspaper |
author |
Durrani, S.A. Al-Khalifa, I.J.M. |
author_facet |
Durrani, S.A. Al-Khalifa, I.J.M. |
author_sort |
Durrani, S.A. |
title |
The Dependence of Thermoluminescence Sensitivity Upon the Temperature of Irradiation in Meteorites and in Terrestrial Apatites |
title_short |
The Dependence of Thermoluminescence Sensitivity Upon the Temperature of Irradiation in Meteorites and in Terrestrial Apatites |
title_full |
The Dependence of Thermoluminescence Sensitivity Upon the Temperature of Irradiation in Meteorites and in Terrestrial Apatites |
title_fullStr |
The Dependence of Thermoluminescence Sensitivity Upon the Temperature of Irradiation in Meteorites and in Terrestrial Apatites |
title_full_unstemmed |
The Dependence of Thermoluminescence Sensitivity Upon the Temperature of Irradiation in Meteorites and in Terrestrial Apatites |
title_sort |
dependence of thermoluminescence sensitivity upon the temperature of irradiation in meteorites and in terrestrial apatites |
publisher |
Oxford University Press (OUP) |
publishDate |
1990 |
url |
http://dx.doi.org/10.1093/oxfordjournals.rpd.a080757 https://academic.oup.com/rpd/article-pdf/33/1-4/55/47981942/rpd_33_1-4_55.pdf |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Radiation Protection Dosimetry volume 33, issue 1-4, page 55-58 ISSN 1742-3406 0144-8420 |
op_doi |
https://doi.org/10.1093/oxfordjournals.rpd.a080757 |
container_title |
Radiation Protection Dosimetry |
container_volume |
33 |
container_issue |
1-4 |
container_start_page |
55 |
op_container_end_page |
58 |
_version_ |
1766282435224403968 |