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KBr single crystals are investigated by means of photostimulated thermoluminescence from 50 to 250°K. The spectral range of photostimulation is 240-700mµ. No evidence of V band stimulation has been found; only electron traps are involved in the stimulation process. Filling of the traps occurs either through capture of photoelectrons from the conduction band, or by tunneling of electrons from excited F centers to neighbouring traps.
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Crippa et al. (1968) studied this question.
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