首页 | 本学科首页   官方微博 | 高级检索  
     


Radiation effect on the 400-nm-thermoluminescence emission of a potassium-rich feldspar
Authors:V. Correcher   J. M. Gomez-Ros  J. Garcia-Guinea
Affiliation:

a CIEMAT, Department of Radiation Dosimetry, Av. Complutense 22, Madrid 28040, Spain

b Museo Nacional de Ciencias Naturales, C/José Gutiérrez Abascal 2, Madrid 28006, Spain

Abstract:The UV-blue thermoluminescence (TL) emission of exsolved and twinned potassium feldspars is potentially valid to be employed in the field of dating and retrospective dosimetry. This paper reports about the following results: (i) The dose dependence of the 400 nm TL intensity of a K-rich feldspar exhibits an excellent linearity in the range of 50 mGy–8 Gy. (ii) The stability of the TL signal after 6 months of storage, shows an initial rapid decay (ca. 45%) maintaining the stability from 40 days onwards which indicates that the electron population decreases asymptotically by the X-axis and the involved electrons are located in deeper traps at room temperature. The fading process can be fitted to a first-order decay equation of the sort y=y0+A exp(−x/t). (iii) The tests of thermal stability at different temperatures confirm a continuous trap distribution with progressive changes in the glow curve shape, intensity and temperature position of the maximum peak. According to this behaviour some physical parameters are defined.
Keywords:Potassium-rich feldspar   Thermoluminescence   Dosimetry   Trap distribution
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号