Proton irradiation-induced defect aggregation and metallic nanoparticles in CaF2 single-crystal

Hazem, R.; Izerrouken, M.

doi:10.1016/j.radphyschem.2022.110643

Cited by 5 publications

(1 citation statement)

References 32 publications

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“…It should be noted here that the anionic vacancies that are part of oxygen centers can and should capture electrons and transform into F-type centers. But, although the irradiation temperature was not so high, this does not allow F centers to survive and their most likely fate here is to form dimer centers and metal colloids, as was observed in the case of CaF 2 and MgF 2 [41][42][43][44]. The capturing of electrons by halogen vacancies near oxygen ions also makes it possible to understand the modification of the PL spectrum.…”

Section: Resultsmentioning

confidence: 99%

The Effect of Fast Kr Ion Irradiation on the Optical Absorption, Luminescence, and Raman Spectra of BaFBr Crystals

Akilbekov,

Kenbayev,

Dauletbekova

et al. 2023

Crystals

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In this work, using photoluminescence (PL), optical absorption (OA), Raman spectroscopy (RS), and atomic force microscopy (AFM), the radiation damage of BaFBr crystals irradiated with 147 MeV 84Kr ions to fluences (1010–1014) cm2 was investigated. The manifestations of the oxygen impurity contained in the studied crystals on the effects associated with ion irradiation are also considered. In unirradiated crystals, the PL spectra exhibited bands related to the oxygen impurity. Moreover, it was found that quenching and a shift of the PL maximum occur, which is due to the fact that, with increasing dose, aggregation of defects occurs. Electronic and hole aggregate color centers appear mainly in the bromide sublattice. A detailed study of the Raman spectra and comparison with the corresponding data for KBr single crystals made it possible to reveal the corresponding manifestations of the Raman modes of complex Br3−-type hole centers.

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Section: Resultsmentioning

confidence: 99%