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Суржиков, А. П.; Chernyavskii, A. V.; Ghyngazov, S. A.; Frangul'yan, T. S.

doi:10.1023/a:1023870404023

Cited by 13 publications

(1 citation statement)

References 3 publications

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“…The activation energy for diffusion of Mg is higher than that of F centers ͑1 eV͒. 14,45 For Mg-colloid formation it is thus important that the concentration of F centers remains high enough up to temperatures where the Mg impurities become mobile. On the other hand, the formation of Li colloids leads to a depletion of F-centers which suppresses the formation of Mg colloids.…”

Section: Mg Colloid Formationmentioning

confidence: 99%

Effect of irradiation parameters on defect aggregation during thermal annealing of LiF irradiated with swift ions and electrons

et al. 2010

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Absorption spectroscopy were performed to study the effects of thermal annealing on the aggregation of color centers in LiF crystals irradiated with different ions between carbon and uranium of megaelectron volt-gigaelectron volt energy. The beam parameters such as energy, energy loss, and fluence have a pronounced influence on the initial defect composition and concentration as well as their evolution upon thermal annealing. A distinct phenomenon was observed, viz., the enhancement of F n centers for annealing temperatures between 500 and 700 K, followed by Li colloid formation above 700 K. The phenomenon requires specific irradiation conditions whereas the formation of Mg colloids from Mg impurities occurs in all irradiated crystals. The mechanisms of annealing and colloid formation are discussed.

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Section: Mg Colloid Formationmentioning

confidence: 99%

Effect of irradiation parameters on defect aggregation during thermal annealing of LiF irradiated with swift ions and electrons

et al. 2010

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Formation of the defect halo of swift heavy ion tracks in LiF due to spatial redistribution of valence holes

Medvedev

Schwartz

Trautmann

et al. 2013

Physica Status Solidi (b)

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The fundamental effect of the relaxation kinetics of the ensemble of generated valence holes on structure transformations in swift heavy ions tracks in alkali halides is demonstrated. The parameters of the spatial distributions of F‐color centers formed in the nanometric vicinities of the trajectories of different ions (from C to U) decelerated in LiF in the electronic stopping regime were extracted from the in situ spectroscopy experiments. Formation of these defects results from self‐trapping of valence holes appearing during material ionizations followed by creation and decay of self‐trapped excitons. The Monte‐Carlo model is applied in order to determine the initial radial distributions of valence holes in tracks of different ions. The detected large difference between the hole and defect distributions indicates fast and long‐range diffusion of valence holes from the ion trajectory before their self‐trapping. The averaged diffusion coefficient (Dh) of hot holes at the subpicosecond time scale after the projectile passage as well as the conversion efficiencies of valence holes into color centers (β) in relaxing tracks of different ions are estimated (Dh = 0.016–1.4 cm2 s−1, β = 0.01–0.04).

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Color center accumulation in LiF crystals under irradiation with MeV ions: Optical spectroscopy and modeling

Russakova

Sorokin

Schwartz

et al. 2013

Nuclear Instruments and Methods in Physics Research Section B:

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Cited by 13 publications

References 3 publications

Effect of irradiation parameters on defect aggregation during thermal annealing of LiF irradiated with swift ions and electrons

Effect of irradiation parameters on defect aggregation during thermal annealing of LiF irradiated with swift ions and electrons

Formation of the defect halo of swift heavy ion tracks in LiF due to spatial redistribution of valence holes

Color center accumulation in LiF crystals under irradiation with MeV ions: Optical spectroscopy and modeling

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