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VOLUME 61 (1995) | ISSUE 4 | PAGE 259
Two mechanisms for spectral diffusion in optical spectra of impurity centers
A study has been made of how the interaction of an impurity center with tunneling excitations of the solvent affects the time evolution of the spectral lines of pentacene molecules in a para-terphenyl crystal. Interactions diagonal and nondiagonal in terms of electron indices are considered; they are manifested in different ways in the spectral diffusion.© 1995 American Institute of Physics.