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Effects of γ-radiation on fluorite crystals with a trivalent rare-earth ions
https://doi.org/10.22349/1994-6716-2023-114-2-195-202
Abstract
The paper considers phenomena of formation of color centers due to intrinsic and impurity defects in fluorite crystals activated by rare-earth ions Pr3+, Nd3+, Yb3+ under γ- and UV-radiation. Using CaF2 activated with Yb3+ and Pr3+ ions as an example, the work shows the effect of the photodynamic process on the photochemical resistance to formation of color centers of a Yb-containing crystal. It also demonstrates the effect of heating on the restoration of the original color of a Pr-containing crystal after γ-radiation as a result of change in the electronic state of praseodymium ions. The features of the formation of ions in the R2+ state in CaF2:R3+ (R3+ = Pr, Nd, Yb) crystals after γ-irradiation are investigated and explained, and quantitative estimates of the R3+→R2+ conversion processes are given.
About the Authors
S. E. Sarkisov
National Research Center “Kurchatov Institute”
Russian Federation
Russian Federation
Cand Sc. (Phys-Math)
1 Akademika Kurchatova Square, 123182 Moscow
V. A. Yusim
National Research Center “Kurchatov Institute”
Russian Federation
Russian Federation
Cand Sc (Eng)
1 Akademika Kurchatova Square, 123182 Moscow
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Review
For citations:
Sarkisov S.E., Yusim V.A. Effects of γ-radiation on fluorite crystals with a trivalent rare-earth ions. Voprosy Materialovedeniya. 2023;(2(114)):195-202. (In Russ.) https://doi.org/10.22349/1994-6716-2023-114-2-195-202
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