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VOLUME 48 (1988) | ISSUE 6 | PAGE 334
Photoinduced spectral diffusion in organic glasses with impurities
Changes have been observed in the intensity, width, and shape of the gap in the 0-0 optical absorption band of an impurity molecule in an amorphous polymer subjected to nonresonant optical excitation. The effect is linked with a change caused in the distribution of the populations of the two-level systems of the glass by photoexcited nonequilibrium phonons.