Defects in CaF2 caused by long-time irradiation and their response to annealing

0357908 - GLÚ 2011 CZ eng J - Journal Article
Vlček, V. - Čížek, J. - Drahokoupil, J. - Valenta, J. - Miyajima, N. - Skála, Roman
Defects in CaF2 caused by long-time irradiation and their response to annealing.
Philosophical Magazine. Roč. 90, č. 20 (2010), s. 2749-2769. ISSN 1478-6435. E-ISSN 1478-6443
Institutional research plan: CEZ:AV0Z30130516
Keywords : fluorite * microstructure * defect * positron annihilation spectroscopy * photoluminescence spectroscopy * transmission electron microscopy * X-ray diffraction
Subject RIV: DB - Geology ; Mineralogy
Impact factor: 1.302, year: 2010

Samples of CaF₂ irradiated in nature were studied by XRD, PAS, PLS and TEM. It was found that the unexpectedly high density of radiation-induced defects present in the fluorite structure causes significant micro-strains. Even annealing up to 450°C cannot completely remove these micro-strains. PAS and theoretical calculations revealed the behaviour of the defects. The PL spectra of irradiated fluorite were also interpreted.
Permanent Link: http://hdl.handle.net/11104/0196077