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- Title
UV-Induced Thermoluminescence of Natural Ca-Rich Carbonates.
- Authors
Correcher, V.; Boronat, C.; Virgos, M. D.; Garcia-Guinea, J.
- Abstract
The 400-nm-thermoluminescence (TL) emission of UV (254.7 nm) irradiated Ca-rich carbonates of inorganic (aragonite) and biogenic (mollusc exoskeleton) origin is here reported. The samples exhibit complex glow curves, but (i) acceptable TL sensitivity when exposed to ultraviolet C (UVC) irradiation and (ii) stability of the UV-induced TL signal with initial rapid decay (ca. 70% for the aragonite and 40% for the biogenic carbonate) while maintaining the stability from 75 and 150 h onwards. The dose response shows a signifi cant scattered behavior up to 8 h of UVC exposure, which may be associated with a combination of the phototransfer TL mechanism, the bleaching process, and the partially ionizing effect of the UVC irradiation.
- Subjects
CARBONATE minerals; CARBONATES; ARAGONITE; THERMOLUMINESCENCE; CALCIUM carbonate; ULTRAVIOLET radiation; ANIMAL exoskeletons
- Publication
Journal of Applied Spectroscopy, 2020, Vol 86, Issue 6, p1004
- ISSN
0021-9037
- Publication type
Article
- DOI
10.1007/s10812-020-00931-5