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Volume 15
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10.3390/cryst15090785
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Article

Creation and Stability of Color Centers in BaF2 Single Crystals Irradiated with Swift 132Xe Ions

by
Daurzhan Kenbayev
1,*,
Michael V. Sorokin
2,
Ayman S. El-Said
3,
Alma Dauletbekova
4,
Balzhan Saduova
4,
Gulnara Aralbayeva
4,*,
Abdirash Akilbekov
4,
Evgeni Shablonin
5 and
Assyl-Dastan Bazarbek
4
1
Department of Physics and Informatics, Graduate School of STEM Education, Shakarim University, Glinka St. 20A, Semey 071412, Kazakhstan
2
National Research Centre ‘Kurchatov Institute’, Kurchatov Square 1, 123182 Moscow, Russia
3
Physics Department and Interdisciplinary Research Center for Advanced Materials, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
4
Department of Technical Physics, Institute of Physics and Technology, L.N. Gumilyov Eurasian National University, Satpayev St. 2, Astana 010008, Kazakhstan
5
Institute of Physics, University of Tartu, W. Ostwald Str. 1, 50411 Tartu, Estonia
*
Authors to whom correspondence should be addressed.
Crystals 2025, 15(9), 785; https://doi.org/10.3390/cryst15090785
Submission received: 23 July 2025 / Revised: 27 August 2025 / Accepted: 29 August 2025 / Published: 31 August 2025
(This article belongs to the Section Crystal Engineering)
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Abstract

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.
Keywords: ion irradiation; barium fluoride; optical absorption; color centers; thermal annealing ion irradiation; barium fluoride; optical absorption; color centers; thermal annealing

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MDPI and ACS Style

Kenbayev, D.; Sorokin, M.V.; El-Said, A.S.; Dauletbekova, A.; Saduova, B.; Aralbayeva, G.; Akilbekov, A.; Shablonin, E.; Bazarbek, A.-D. Creation and Stability of Color Centers in BaF2 Single Crystals Irradiated with Swift 132Xe Ions. Crystals 2025, 15, 785. https://doi.org/10.3390/cryst15090785

AMA Style

Kenbayev D, Sorokin MV, El-Said AS, Dauletbekova A, Saduova B, Aralbayeva G, Akilbekov A, Shablonin E, Bazarbek A-D. Creation and Stability of Color Centers in BaF2 Single Crystals Irradiated with Swift 132Xe Ions. Crystals. 2025; 15(9):785. https://doi.org/10.3390/cryst15090785

Chicago/Turabian Style

Kenbayev, Daurzhan, Michael V. Sorokin, Ayman S. El-Said, Alma Dauletbekova, Balzhan Saduova, Gulnara Aralbayeva, Abdirash Akilbekov, Evgeni Shablonin, and Assyl-Dastan Bazarbek. 2025. "Creation and Stability of Color Centers in BaF2 Single Crystals Irradiated with Swift 132Xe Ions" Crystals 15, no. 9: 785. https://doi.org/10.3390/cryst15090785

APA Style

Kenbayev, D., Sorokin, M. V., El-Said, A. S., Dauletbekova, A., Saduova, B., Aralbayeva, G., Akilbekov, A., Shablonin, E., & Bazarbek, A.-D. (2025). Creation and Stability of Color Centers in BaF2 Single Crystals Irradiated with Swift 132Xe Ions. Crystals, 15(9), 785. https://doi.org/10.3390/cryst15090785

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