The Effect of Fast Kr Ion Irradiation on the Optical Absorption, Luminescence, and Raman Spectra of BaFBr Crystals

Akilbekov A. Kenbayev D. Dauletbekova A. Polisadova E. Yakovlev V. Karipbayev Z. Shalaev A. Elsts E. Popov A.I.
August 2023 Multidisciplinary Digital Publishing Institute (MDPI)

Crystals
2023 #13 Issue 8

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 (Formula presented.) -type hole centers.

BaFBr , degradation , impurity , photoluminescence , pulsed cathodoluminescence , swift heavy ions , X-ray luminescence

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Department of Technical Physics, L.N. Gumilyov Eurasian National University, Satpayev Str. 2, Astana, 010008, Kazakhstan
School of Advanced Manufacturing Technologies, National Tomsk Polytechnic University, Tomsk, 634050, Russian Federation
Vinogradov Institute of Geochemistry, Siberian Branch of Russian Academy of Sciences, Favorskii Str. 1a, Irkutsk, 664033, Russian Federation
Institute of Solid State Physics, University of Latvia, Kengaraga 8, Riga, LV-1063, Latvia

Department of Technical Physics
School of Advanced Manufacturing Technologies
Vinogradov Institute of Geochemistry
Institute of Solid State Physics

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