Energy Dissipation in Impurity DopedAlkaline-Earth Fluorides

Author

Radzhabov, Evgeny A. ; Kirm, Marco ; Egranov, Alexandr ; Nepomnyaschikh, Alexandr

Author_Institution

Vinogradov Inst. of Geochem., Russian Acad. of Sci., Irkutsk

Volume

55

Issue

3

fYear

2008

fDate

6/1/2008 12:00:00 AM

Firstpage

1123

Lastpage

1127

Abstract

Excitation spectra of CaF₂, SrF₂ and BaF₂ crystals doped by CdF₂, LaF₃, YF₃ in the vacuum ultraviolet region were investigated at liquid-helium temperature and at room temperature. Spectra of doped BaF₂ at low temperature and CaF₂, SrF₂ at room temperature show significant decrease of excitation intensity against those in undoped crystals while the intensities in exciton regions remain nearly the same. The common reason of the suppression of exciton emission by impurity in alkaline-earth fluorides is unradiative electron-hole recombination on impurity sites.

Keywords

barium compounds; cadmium compounds; calcium compounds; electron-hole recombination; excitons; impurities; lanthanum compounds; strontium compounds; ultraviolet spectra; yttrium compounds; BaF₂:CdF₂; BaF₂:LaF₃; BaF₂:YF₃; CaF₂:CdF₂; CaF₂:LaF₃; CaF₂:YF₃; SrF₂:CdF₂; SrF₂:LaF₃; SrF₂:YF₃; energy dissipation; excitation spectra; exciton emission; impurity doped alkaline-earth fluorides; liquid-helium temperature; temperature 293 K to 298 K; temperature 4.2 K; unradiative electron-hole recombination; vacuum ultraviolet spectra; Cadmium; Charge carrier processes; Crystals; Electromagnetic wave absorption; Electron traps; Energy dissipation; Excitons; Impurities; Luminescence; Temperature; Excitons; impurity; suppression; vacuum ultraviolet;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/TNS.2008.922823

Filename

4545201