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

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      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

       
  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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