DataVXPhilosophical MagazinePaper
journal article·2010-07-14

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

Vojtěch Vlček, Jakub Čížek, Jan Drahokoupil, Jan Valenta, Nobuyoshi Miyajima, Roman Skála

Philosophical Magazine· Volume 90· Issue 20
Publisher page
Source abstract

Abstract

Samples of CaF2 irradiated for millions of years in nature were studied by several methods, including X-Ray diffraction, positron annihilation spectroscopy (PAS), photoluminescence spectroscopy (PLS) and transmission electron microscopy (TEM). It was found that the unexpectedly high density of radiation-induced defects present in the fluorite structure (documented by TEM) causes significant micro-strains. Even annealing up to 450°C cannot completely remove these micro-strains, which are stabilised by impurities. PAS and subsequent theoretical calculations revealed the behaviour of the defects during heating. The PL spectra of irradiated fluorite were also interpreted.
Source: openalex_inverted_index · Quality: baseline

Research context

Materials processing

OpenAlex topics: Muon and positron interactions and applications · Ion-surface interactions and analysis · Advanced ceramic materials synthesis

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

a Faculty of Sciences , Charles University in Prague , Albertov 6, CZ – 12000, Prague 2 , Czech Republic

b Bayerisches Geoinstitut, Universität Bayreuth , D-95440, Bayreuth , Germany

c Faculty of Mathematics and Physics , Charles University in Prague , V Holešovičkách 2, CZ-18000, Praha 8 , Czech Republic

d Institute of Physics of the ASCR , v. v. i., Na Slovance 2, CZ-182 21, Prague 8 , Czech Republic

e Faculty of Nuclear Sciences and Physical Engineering , Czech Technical University , Trojanova 13, CZ-120 00, Prague 2 , Czech Republic

f Faculty of Mathematics and Physics , Charles University in Prague , Ke Karlovu 3, CZ-12000, Praha 2 , Czech Republic

g Institute of Geology of the ASCR , v. v. i., Rozvojová 269, CZ-16500, Prague 6 , Czech Republic

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