Abstract
Good quality U3+-doped LaBr3 single crystals have been obtained by the Bridgman–Stockbarger method. High-resolution low temperature emission spectra were recorded in a wide spectral range and are discussed. The emission from the 2K15/2, 2H11/2, and 4F9/2 levels to the 4I9/2 ground state and from 2K15/2 to the first excited state 4I11/2, have been investigated and are discussed with respect to vibronic transitions. The registered vibronic lines were compared with the Raman spectra of LaBr3 single crystals.
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