Creation and Stability of Color Centers in BaF2 Single Crystals Irradiated with Swift 132Xe Ions
Kenbayev D. Sorokin M.V. El-Said A.S. Dauletbekova A. Saduova B. Aralbayeva G. Akilbekov A. Shablonin E. Bazarbek A.-D.
September 2025Multidisciplinary Digital Publishing Institute (MDPI)
Crystals
2025#15Issue 9
It was demonstrated that various defects can be induced in halide crystals by irradiation with swift heavy ions. Here, we irradiated barium fluoride (BaF2) single crystals with 220 MeV xenon ions at room temperature and performed stepwise thermal annealing up to the temperature of 825 K to study the kinetics of ion-induced defects at different temperatures. Optical spectroscopy was utilized for the measurement of the wide range of absorption spectra from NIR to VUV. A sharp decrease in the F2 absorption peak was observed for the samples annealed in the temperature range of 400–450 K. This result can be explained by their recombination with anion interstitials during thermal decay of the complex hole centers. The mobile interstitials, those did not recombine with the F2 centers, increase the absorption peaks in the 9–10 eV region, which can be associated with interstitial aggregates.
barium fluoride , color centers , ion irradiation , optical absorption , thermal annealing
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Department of Physics and Informatics, Graduate School of STEM Education, Shakarim University, Glinka St. 20A, Semey, 071412, Kazakhstan
National Research Centre ‘Kurchatov Institute’, Kurchatov Square 1, Moscow, 123182, Russian Federation
Physics Department and Interdisciplinary Research Center for Advanced Materials, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
Department of Technical Physics, Institute of Physics and Technology, L.N. Gumilyov, Eurasian National University, Satpayev St. 2, Astana, 010008, Kazakhstan
Institute of Physics, University of Tartu, W. Ostwald Str. 1, Tartu, 50411, Estonia
Department of Physics and Informatics
National Research Centre ‘Kurchatov Institute’
Physics Department and Interdisciplinary Research Center for Advanced Materials
Department of Technical Physics
Institute of Physics
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