Study of paramagnetic and luminescence centers of microcline feldspar

Autor:	Casimiro S. Munita, L. C. Courriol, Sonia Hatsue Tatumi, Luciana R. P. Kassab, Angela Mitie Otta Kinoshita, Oswaldo Baffa, M.E. Fukumoto
Rok vydání:	2005
Předmět:	Radiation Microcline Materials science Thermoluminescence dating Analytical chemistry engineering.material Feldspar Thermoluminescence Crystal Paramagnetism visual_art visual_art.visual_art_medium engineering Emission spectrum Luminescence
Zdroj:	Applied Radiation and Isotopes. 62:231-236
ISSN:	0969-8043
Popis:	Microcline feldspar crystal has been analyzed in order to determine the centers suitable for use in ESR and luminescence dating. ESR measurements at RT showed the Fe3+ line, and at 77K the Si-O(-) ..X signal with g=2.0052, 2.0098 and 2.0128. TL glow peak at 157 and 300 degrees C in UV interval were observed and in the VIS range we noted peaks at 150, 280 and 340 degrees C. TL growth curve of the 340 degrees C peak could be fitted by a saturating exponential equation and can be used in TL dating. Emission curves showed band widths 1.95+/-0.09, 2.73+/-0.08 and 4.94+/-0.50 eV. Transitions from 4T1--6A1)of Fe3+ can be associated with the 1.95 eV band and the transition from 4A1 4E(G)--6A1(S) with 2.73 eV band.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8c5012f6daf711ffd1cabe2e0fd480a3 https://doi.org/10.1016/j.apradiso.2004.08.006 Zobrazit plný text záznamu Full Text from ScienceDirect