Abstract
It was shown that optical bleaching of M +A color centers at 80 K in SrF2-Na crystals causes the core of an M +A -center to transform into the V +a Me + V +a configuration, in which all three point defects are arranged diagnonally in the cube cell. Reirradiation of an optically bleached crystal by x-rays generates F D centers in it: V +a Me + V +a + e − → V 0a Me + V +a ≡ F D. The F D → M +A transformation in SrF2-Na crystals proceeds at T = 135 K, in contrast to the F A → M +A transformations, which take place at T > 200 K.
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Original Russian Text © S.I. Kaschan, Z.P. Chornij, 2006, published in Fizika Tverdogo Tela, 2006, Vol. 48, No. 2, pp. 239–242.