Abstract

The aim of this paper is to give some simplified expressions related to the peak shape method. The modified equations have been used to calculate the activation energy (E) of commercial thermoluminescent dosimeters (TLD), as well as of ZnO thermoluminescent material produced in laboratory; the values so determined have been compared to the values obtained using the classical expressions of the peak shape method. The modified equations proposed are as a function of peak shape parameters or the peak temperature at the maximum. This expression could be useful to obtain approximated E values in the case of complex glow curves as well, when the peaks are not well resolved but the peak temperature at the maximum may be easily determined.

Highlights

  • Luminescence is defined as the emission of light from some solids commonly called phosphors

  • The modified equations have been used to calculate the activation energy (E) of commercial thermoluminescent dosimeters (TLD), as well as of ZnO thermoluminescent material produced in laboratory; the values so determined have been compared to the values obtained using the classical expressions of the peak shape method

  • This emission is the release of energy stored within the solid through some type of prior excitation of the solid electronic system, i.e. by visible, infrared (IR) or ultra violet (UV) light and ionizing radiation [1] [2]

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Summary

Introduction

Luminescence is defined as the emission of light from some solids commonly called phosphors. This emission is the release of energy stored within the solid through some type of prior excitation of the solid electronic system, i.e. by visible, infrared (IR) or ultra violet (UV) light and ionizing radiation [1] [2]. The ability to store the radiation energy is important in luminescence dosimetry and is generally associated with the presence of activators (i.e. impurity atoms and structural defects) which act as trapping levels for the free electrons generated by excitation [1] [3]. Furetta of ionizing radiation dose; the most popular luminescence dosimetric technique is called thermoluminescence (TL): it consists in a transient emission of light from an irradiated solid when heated [1] [3]

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