Photochromism in Calcium and Strontium Fluoride Crystals Doped With Rare-Earths Ions

Author

Sizova, T. ; Radzhabov, E.

Author_Institution

Dept. of Phys. of Monocrystals, Vinigradov´´ Inst. of Geochem., Irkutsk, Russia

Volume

59

Issue

5

fYear

2012

Firstpage

2098

Lastpage

2101

Abstract

This paper reports the absorption spectra of photochromic centers in CaF₂ and SrF₂ crystals doped with Ce³⁺ and Gd³⁺ impurities and thermal decay of the centers in temperature range 80-500 K. The ionized photochromic color centers are generated in crystals under low-temperature X-rays irradiation. These centers are transformed into photochromic color centers upon heating of crystals. All color centers decay at temperature about 500 K.

Keywords

X-ray effects; calcium compounds; cerium; colour centres; gadolinium; heat treatment; impurities; photochromism; strontium compounds; ultraviolet spectra; visible spectra; CaF crystal; CaF₂:Ce; CaF₂:Gd; SrF crystal; SrF₂:Ce; SrF₂:Gd; ionized photochromic color centers; low-temperature X-rays irradiation; photochromic center absorption spectra; rare-earths ions; temperature 80 K to 500 K; thermal decay; Absorption; Crystals; Heating; Image color analysis; Ions; Particle beam optics; Solids; Alkaline-earth fluorides; X-rays; optical spectroscopy; radiation hardness; rare earths; scintillators;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/TNS.2012.2190423

Filename

6186802