Abstract

Vibronic structures in the excitation spectra of NaCl:Mn, forming Suzuki-phase precipitates, have been investigated. The occurence of such a phase has been ascertained by means of Raman spectroscopy. Vibronic progressions have been interpreted along the lines previously developed for manganese dihalide crystals. The frequencies of the active phonons inferred from the vibronic progressions compare very well with the values determined through the Raman spectra. It is suggested that vibronic spectroscopy may be an interesting tool to study ordered phases of optically active impurities in dielectric crystals.

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