Study of paramagnetic and luminescence centers of microcline feldspar

S H Tatumi; A Kinoshita; M E Fukumoto; L C Courriol; L R P Kassab; O Baffa; C S Munita

doi:10.1016/j.apradiso.2004.08.006

Study of paramagnetic and luminescence centers of microcline feldspar

Appl Radiat Isot. 2005 Feb;62(2):231-6. doi: 10.1016/j.apradiso.2004.08.006.

Authors

S H Tatumi¹, A Kinoshita, M E Fukumoto, L C Courriol, L R P Kassab, O Baffa, C S Munita

Affiliation

¹ Faculdade de Tecnologia de São Paulo, Praça Cel. Fernando Prestes, 30, 01124-060, São Paulo, SP, Brasil. tatumi@fatecsp.br

PMID: 15607454
DOI: 10.1016/j.apradiso.2004.08.006

Abstract

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.