Thermoluminescence and photoluminescence studies on gamma irradiated CsI: Pb2+ crystals |
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| Authors: | S Selvasekarapandian G M Brahmanandhan J Malathi V Joseph |
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| Institution: | 1. Solid State and Radiation Physics Laboratory, Department of Physics , Bharathiar University , Coimbatore, 641 046, Tamil Nadu, India sekarapandian@yahoo.com;3. Solid State and Radiation Physics Laboratory, Department of Physics , Bharathiar University , Coimbatore, 641 046, Tamil Nadu, India;4. Department of Physics , Karunya Institute of Technology and Sciences , Coimbatore, 641 114, Tamil Nadu, India |
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| Abstract: | Pure and Pb2+-doped CsI crystals have been grown by the Bridgemann technique. Optical absorption, thermoluminescence (TL) and photoluminescence (PL) measurements have been performed. In undoped and Pb2+-doped cesium iodide crystals, F-centers and V-centers have been produced at 770 nm and 350 nm, respectively. In Pb2+-doped crystals, additional centers at 373 nm, 290 nm and 258 nm bands have been produced. In undoped samples, only two glow peaks at 343 K and 373 K have been produced, and in Pb2+-doped samples additional glow peaks at 383 K and 423 K have been produced. For all the samples, TL emission, PL and excitation measurements have been performed. |
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| Keywords: | Thermoluminescence Alkali halides Photoluminescence Cesium iodide |
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