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    • Thermoluminescence in single crystals of RbBr:OH− and RbBr:Ca2+

      S B S Sastry S Sapru

      Solid State Physics Volume 15 Issue 3 September 1980 pp 271-278

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/015/03/0271-0278

    • Keywords

       

      Thermoluminescence; RbBr:OH−; RbBr:Ca2+; optical absorption; emission spectra

    • Abstract

       

      Optical absorption, thermoluminescence glow and emission spectra of RbBr:Ca2+ and RbBr:OH− have been studied and analysed. It is observed that both Ca2+ and OH− ions enhance theF-centre concentration.FZ1 band in RbBr:Ca2+ appears at 1.55 eV. TL glow peak corresponding toFZ1 centre on analysis gives a trap depth of 0.84 eV. OH− ions in the crystal seem to act as TL ‘killers’. Spectral distribution of emission under the glow peaks shows five bands around 1.5, 1.8, 2.1, 2.5 and 2.9 eV. Probable models of TL mechanism are suggested to explain the observed TL emission bands.

    • Author Affiliations

       

      S B S Sastry1 S Sapru1

      1. Department of Physics, Indian Institute of Technology, Madras - 600 036, India

    • Dates

       
      Published
      September 1980
      Manuscript received
      11 April 1979
      Manuscript revised
      17 July 1980

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