Lifetime estimation of thermoluminescence traps in granitic quartz

Thermoluminescence (TL) traps in granitic quartz are potential geochronometers for ages of up to billions years. TL sensitivity is believed to be a measure of the population of TL traps. Their lifetimes can be roughly estimated either by isothermal annealing or by an empirical approach. The former i...

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Bibliographic Details
Published in:Radiation effects and defects in solids 2000-08, Vol.152 (4), p.307-314
Main Authors: Han, Zhi-Yong, Li, Sheng-Hua, Tso, Man-Yin W.
Format: Article
Language:English
Subjects:
Earth sciences
Earth, ocean, space
Exact sciences and technology
Geochronology
Granitic quartz
Isothermal annealing
Isotope geochemistry. Geochronology
Lifetime
Mineralogy
Silicates
TL trap
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Summary:Thermoluminescence (TL) traps in granitic quartz are potential geochronometers for ages of up to billions years. TL sensitivity is believed to be a measure of the population of TL traps. Their lifetimes can be roughly estimated either by isothermal annealing or by an empirical approach. The former is applicable to radiation sensitive traps corresponding to > 200°C TL when first order kinetics is assumed. The lifetimes are found to be several orders longer than those of trapped electrons. The lifetimes of thermally sensitive traps (< 200°C TL) are estimated from empirical curves that are constructed from data from granitic quartz of known age. It is found that the lifetime increases with the trap depth.
ISSN:1042-0150
1029-4953
DOI:10.1080/10420150008213260