Abstract
Generation and bleaching with polarized light of the EPR signal associated with the zinc vacancy-chlorine donor pair ( A-center) in ZnS : Cl are described. Excitation bands at 3550 and 3300Å and bleaching bands at 9000 and 13,000Å are revealed and their polarization properties determined. The close correlation with the polarized luminescence studies of Koda and Shionoya on the ‘self-activated’ luminescence center confirms that the luminescence arises from the zinc vacancy-chlorine pair.
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