Absorption and emission energies of certain alkali halide phosphors under pressure have been measured. The systems involved were KCl:Tl, NaCl:Tl, KCl:Pb, NaCl:Pb, CsI:Tl, and NaI:Tl, and pressures in excess of 40 kbar were employed. Data for NaCl:Tl and the low- and high-pressure forms of KCl:Tl could be fitted by a configuration coordinate model, but the behavior of the other systems could not be described in this way.
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Alers et al. (1964) studied this question.
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