Various configurations of F-H pairs in CaF₂ crystals

Chem. Met. Alloys 4 (2011) 26-30

https://doi.org/10.30970/cma4.0141

S.I. Kachan, E.E. Obukhova, S.A. Stepanov, E.P. Chinkov, V.F. Shtan’ko

The spectral and kinetic parameters of electron-pulse-initiated transient absorption and luminescence of nominally pure CaF₂ crystals were studied using pulsed spectrometry with nanosecond time resolution. The effect of temperature on the formation of defects was studied. It was established that on increasing the temperature F-H pairs and unknown defects are created. Laser-induced change is studied by optical absorption and luminescence due to F-H pairs generated by an electron pulse in CaF₂.

A schematic configuration of coordinate curves for the hopping motion of an interstitial fluorine atom that is part of a Frenkel pair.

Keywords

Fluorite crystals / Point defects / Frenkel pairs / Separated F-H pairs