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The Linearly modulated IRSL red emission from feldspars

100%

Fattahi M. , Singarayer J. S. , Bailey R. M. , Stokes S.

Geochronometria

2006

tom Vol. 25

19-28

This paper uses the linear modulation technique to study red IRSL emission of potassium feldspars. Sub-samples were subjected to various pre-treatment and measurement conditions in an attempt to understand the relevant mechanisms of charge transfer. The linear modulation curves fitted most successfully to a sum of three first order components and we present supporting empirical evidence for the presence of three separate signal components. Additionally, the form of the red emission was observed to closely resemble the UV emission, implying the same donor charge concentrations may supply different recombination centres (assuming emission wavelength depends on centre type).

Application of a Genetic Algorithm to finding parameter values for numerical simulation of quartz luminescence

100%

Adamiec G. , Garcia-Talavera M. , Bailey R. M. , Torre de la P. I.

Geochronometria

2004

tom Vol. 23

9-14

The paper presents an application of a Genetic Algorithm (GA) to finding appropriate parameter values for the numerical simulation of quartz thermoluminescence (TL) and Optically Stimulated Luminescence (OSL). It is shown that using a genetic algorithm it is possible to achieve a very good match between simulated and experimentally measured thermal activation characteristics of fired quartz.