Abstract:
In this work, using photoluminescence (PL), optical absorption (OA), Raman spectroscopy
(RS), and atomic force microscopy (AFM), the radiation damage of BaFBr crystals irradiated with
147 MeV 84Kr ions to fluences (1010–1014) cm2 was investigated. The manifestations of the oxygen
impurity contained in the studied crystals on the effects associated with ion irradiation are also
considered. In unirradiated crystals, the PL spectra exhibited bands related to the oxygen impurity.
Moreover, it was found that quenching and a shift of the PL maximum occur, which is due to the fact
that, with increasing dose, aggregation of defects occurs. Electronic and hole aggregate color centers
appear mainly in the bromide sublattice. A detailed study of the Raman spectra and comparison
with the corresponding data for KBr single crystals made it possible to reveal the corresponding
manifestations of the Raman modes of complex Br−
3
-type hole centers.
