The Dependence of Thermoluminescence Sensitivity Upon the Temperature of Irradiation in Meteorites and in Terrestrial Apatites
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 (T irr ). The irradiation temperatures ranged from liquid nitrogen to room temperature (77...
Main Authors: | , |
---|---|
Format: | Text |
Language: | English |
Published: |
Oxford University Press
1990
|
Subjects: | |
Online Access: | http://rpd.oxfordjournals.org/cgi/content/short/33/1-4/55 |
id |
fthighwire:oai:open-archive.highwire.org:rpd:33/1-4/55 |
---|---|
record_format |
openpolar |
spelling |
fthighwire:oai:open-archive.highwire.org:rpd:33/1-4/55 2023-05-15T14:03:27+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. 1990-10-01 00:00:00.0 text/html http://rpd.oxfordjournals.org/cgi/content/short/33/1-4/55 en eng Oxford University Press http://rpd.oxfordjournals.org/cgi/content/short/33/1-4/55 Copyright (C) 1990, Nuclear Technology Publishing Article TEXT 1990 fthighwire 2013-05-27T06:45:45Z 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 (T irr ). 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 T irr 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. Text Antarc* Antarctic HighWire Press (Stanford University) Antarctic The Antarctic |
institution |
Open Polar |
collection |
HighWire Press (Stanford University) |
op_collection_id |
fthighwire |
language |
English |
topic |
Article |
spellingShingle |
Article 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 |
Article |
description |
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 (T irr ). 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 T irr 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 |
Text |
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 |
publishDate |
1990 |
url |
http://rpd.oxfordjournals.org/cgi/content/short/33/1-4/55 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
http://rpd.oxfordjournals.org/cgi/content/short/33/1-4/55 |
op_rights |
Copyright (C) 1990, Nuclear Technology Publishing |
_version_ |
1766274109935714304 |