Thermoluminescence of Heavy Metal Ion Doped Cesium Halides X†Irradiated at Low Temperature

TL studies of CsBr, CsBr:Ag+, CsBr:Cu+, CsCl:Ag+, and CsCl:Cu+ crystals X‐irradiated at liquid nitrogen temperature are made. Both, undoped and impurity‐doped CsBr crystals exhibit two main glow peaks at 116 and 159 K. CsBr:Ag+ crystal exhibits three additional glow peaks (weak) at 133, 176, and 192 K. The main glow peaks in these crystals are attributed to the double migration of thermally activated Vk centers followed by a radiative recombination with trapped electrons. The formation and decay of these centers is supported by optical absorption studies. The formation of Ag0 and Cu0 and the enhancement of Vk centers is also discussed. Similar studies are made on CsCl:Ag+ and CsCl:Cu+ crystals. Two main glow peaks observed at 204 and 246 K in these crystals are attributed to Vk center as in the case of CsBr crystals. The glow peaks are analysed and the TL parameters are evaluated. Copyright © 1981 WILEY‐VCH Verlag GmbH & Co. KGaA