Abstract

The photochemical production of F centers in KBr.Se 2− crystals has been investigated using crystals doped by a method different to that used by others. The formation of F centers is a complicated process and depends on the intensity of irradiating light, temperature and wavelength. Low-power irradiation favors F center formation by ionization of free Se 2− in freshly quenched crystals. Low-temperature UV laser irradiation forms both normal F centers and one other center with an absorption band very close to the normal F center. The nature of this second center is not known.

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