Quantitative analysis of time-resolved infrared stimulated luminescence in feldspars

详细信息    查看全文

• 作者：Vasilis Pagonis^a ; ^{vpagonis@mcdaniel.edu" class="auth_mail" title="E-mail the corresponding author} ; Christina Ankjæ ; rgaard^b ; Mayank Jain^c ; Makaiko L. Chithambo^d
• 关键词：Stimulated luminescence emission ; Feldspars ; Tunneling ; Time-resolved experiments
• 刊名：Physica B: Physics of Condensed Matter
• 出版年：2016
• 出版时间：15 September 2016
• 年：2016
• 卷：497
• 期：Complete
• 页码：78-85
• 全文大小：1045 K

文摘

Time-resolved infrared-stimulated luminescence (TR-IRSL) from feldspar samples is of importance in the field of luminescence dating, since it provides information on the luminescence mechanism in these materials. In this paper we present new analytical equations which can be used to analyze TR-IRSL signals, both during and after short infrared stimulation pulses. The equations are developed using a recently proposed kinetic model, which describes localized electronic recombination via tunneling between trapped electrons and recombination centers in luminescent materials. Recombination is assumed to take place from the excited state of the trapped electron to the nearest-neighbor center within a random distribution of luminescence recombination centers. Different possibilities are examined within the model, depending on the relative importance of electron de-excitation and recombination. The equations are applied to experimental TR-IRSL data of natural feldspars, and good agreement is found between experimental and modeling results.