UV-INDUCED THERMOLUMINESCENCE OF NATURAL Ca-RICH CARBONATES
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 hours onwards. The dose response shows a significant scattered behavior up to 8 hours 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.
Supporting agencies: Cecilia Boronat thanks the “Consejería de Educación, Juventud y Deporte de la Comunidad de Madrid” and “Fondo Social Europeo” for the support provided under the “Operativo de Empleo Juvenil y la Iniciativa de Empleo Juvenil (YEI)” program (B.O.C.M. Núm.152. Orden 1880/2015, de 16 de junio del 2015).
About the Authors
V. Correcher
CIEMAT
Spain
Ave. Complutense 40, Madrid, 28040
Spain
Ave. Complutense 40, Madrid, 28040
C. Boronat
CIEMAT
Spain
Ave. Complutense 40, Madrid, 28040
Spain
Ave. Complutense 40, Madrid, 28040
M. D. Virgos
CIEMAT
Spain
Ave. Complutense 40, Madrid, 28040
Spain
Ave. Complutense 40, Madrid, 28040
J. Garcia-Guinea
CSIC, Museo Nacional Ciencias Naturales
Spain
José Gutiérrez Abascal 2, Madrid 28006
Spain
José Gutiérrez Abascal 2, Madrid 28006
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Review
For citations:
Correcher V., Boronat C., Virgos M.D., Garcia-Guinea J. UV-INDUCED THERMOLUMINESCENCE OF NATURAL Ca-RICH CARBONATES. Zhurnal Prikladnoii Spektroskopii. 2019;86(6):889-894.
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