Thermal annealing of radiation damages produced by swift <sup>14</sup>N and <sup>16</sup>O ions in LiF crystals
М. В. СорокинNational Research Centre ‘Kurchatov Institute’, Kurchatov Square 1, 123182 Moscow, RussiaZh B MalikovaL.N. Gumilyov Eurasian National University, 2 Satpayev St., 010008 Astana, KazakhstanAlma DauletbekovaL.N. Gumilyov Eurasian National University, 2 Satpayev St., 010008 Astana, KazakhstanGuldar BaubekovaL.N. Gumilyov Eurasian National University, 2 Satpayev St., 010008 Astana, KazakhstanGulnara AralbayevaL.N. Gumilyov Eurasian National University, 2 Satpayev St., 010008 Astana, KazakhstanА. АkilbekovL.N. Gumilyov Eurasian National University, 2 Satpayev St., 010008 Astana, Kazakhstan
2024en
ABI
Annotatsiya
Abstract Annealing of color centers was studied in lithium fluoride crystals, irradiated with 23-MeV nitrogen and 28-MeV oxygen ions. Basing on the optical absorption spectroscopy and reaction-rate modelling, a new interpretation of the annealing kinetics at the practically important temperatures below 500 K is suggested. Proposed model explains simultaneous decrease of the F and F 2 /F 3 + peaks as a result of migration of the F centers and formation of larger aggregates, and does not include additional assumptions about impurities and cation vacancies. It specifies the migration energy of the F centers in the ground state to be about 1.3 eV, that corresponds to earlier studies.
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