Effect of plastic deformation on the thermoluminescence of #betta#-irradiated NaCl and KCl crystals

The overall thermoluminescence (TL) intensity of #betta#-irradiated NaCl crystals initially increases and then decreases with the number of newly-created dislocations. However, the overall TL intensity of #betta#-irradiated KCl crystals increases with the increasing number of newly created dislocations. The TL spectra are recorded for different plastic deformations at different temperatures. It is found that the plastic deformation has no considerable effect on the TL spectra of #betta#-irradiated NaCl and KCl crystals. Trap destruction model and trap competition model are discussed for the decrease in the TL 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. (author)