Dose dependence and dose-rate dependence of the optically stimulated luminescence signal

R. Chen, P. L. Leung

Research output: Contribution to journalArticlepeer-review

Abstract

The expected behavior of the dose dependence of the optically stimulated luminescence (OSL) signal has been studied using numerical simulation. A simple model of one trapping state and one kind of recombination center is presented, and the sequence of sets of simultaneous differential equations governing the processes during excitation, relaxation, and light exposure are numerically solved. With the choice of reasonable trapping and recombination parameters, it has been shown that a quadratic dose dependence of this effect results from the model when the irradiation stage starts with empty trapping states. This may explain reports in the literature of an initial supralinear dose dependence of OSL. It is also shown that within the same model, one can get an initial linear dose dependence of OSL if one starts with partly filled traps. Also has been studied the influence of dose rate on the measured OSL signal for a constant total dose, and some effect has been seen for a certain dose-rate range. The similarities and dissimilarities of OSL as compared to thermoluminescence with respect to these phenomena are discussed.

Original languageEnglish
Pages (from-to)259-263
Number of pages5
JournalJournal of Applied Physics
Volume89
Issue number1
DOIs
StatePublished - 1 Jan 2001

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