ANOMALOUS BEHAVIOR OF LiF:Mg,Cu,P (TLD100H) IRRADIATED WITH ELECTRON BEAMS

Abstract

Thermoluminescent dosimeters of LiF:Mg,Cu,P (TLD100H) were exposed to 60Co γ-ray, protons, high energy electrons and the glow curves were analyzed. We observed an unusual behavior of the TL response of dosimeters to 7 and 14 MeV electron beam. In fact the relative amplitude between two of the five peaks (2° and 3° peaks) assumes values smaller than the unity for doses up to 5 Gy and values greater than the unity for doses equal to or greater than 10 Gy. A possible explanation of this behavior is given adopting a model of the formation of the peaks 2° and 3° and examining the different ways of energy release in matter for each beam. To perform this analysis we deconvoluted the glow curve adopting general order kinetic (GOK) equation for the description of the peak shape, determining the number of peaks and their trapping parameter (E, s, n0).