Journal article
Dependence of (anomalous) fading of infra-red stimulated luminescence on trap occupancy in feldspars
National Geophysical Research Institute1
Center for Nuclear Technologies, Technical University of Denmark2
Radiation Physics, Center for Nuclear Technologies, Technical University of Denmark3
AGH University of Science and Technology4
The Hevesy Laboratory, Center for Nuclear Technologies, Technical University of Denmark5
Dose dependency of anomalous fading of infra-red stimulated luminescence (IRSL) from feldspars has been investigated using radiations of different ionisation qualities. The rate of fading of the IRSL signal after proton irradiation (9.4–30%/decade) is on an average almost twice compared to that after 90Sr/90Y beta particle irradiation (3.5–15%/decade) for all the measured feldspar mineral specimens.
Similarly, the fading rates after x-rays of 50 kV and 10 kV fall in between those of beta particle and proton irradiations. Our results suggest that rate of anomalous fading in feldspars depends on the number density of the trapped charge carriers. These results support the hypothesis that anomalous fading occurs across randomly distributed donor-acceptor distances as opposed to pairs with a fixed distance.
Language: | English |
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Year: | 2013 |
Pages: | 704-709 |
ISSN: | 18727883 and 00222313 |
Types: | Journal article |
DOI: | 10.1016/j.jlumin.2013.05.040 |
ORCIDs: | Jain, Mayank and Elema, Dennis Ringkjøbing |