Effect of plastic deformation of the thermoluminescence of γ‐irradiated NaCl and KCl Crystals

Abstract

The overall therrnolurninescence (TL) intensity of y-irradiated NaCl crystals initially increases and then decreases with the number of newly-created dislocations. However, the overall T L intensity of y-irradiated KCl crystals increases with the increasing number of newly created dislocations. The T L spectra are recorded for different plastic deformations a t different temperatures. It is found that the plastic deformation has no considerable effect on the T L spectra of y-irradiated NaCl and KC1 crystals. Trap destruction model and trap competition model are discussed for the decrease in the T L intensity with deformation of the crystals. The physical ideas behind the increase in the relative intensity of glow peaks and the appearance of new glow peaks are explored.