Photo- and radiation-chemical transformations of carbonate ions in CsI andCsI(Tl) crystals

Authors
Grinev, BV Shpilinskaya, LN Kovaleva, LV Kudin, AM Mitichkin, AI Charkina, TA
Citation
Bv. Grinev et al., Photo- and radiation-chemical transformations of carbonate ions in CsI andCsI(Tl) crystals, OPT SPECTRO, 89(1), 2000, pp. 50-55
Citations number
16
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
OPTICS AND SPECTROSCOPY
ISSN journal
0030400X → ACNP
Volume
89
Issue
1
Year of publication
2000
Pages
50 - 55
Database
ISI
SICI code
0030-400X(200007)89:1<50:PARTOC>2.0.ZU;2-Q
Abstract
It is shown that irradiation of CsI and CsI(TI) crystals containing carbona te and hydroxyl ions induces radiation defects there in the form of color c enters, HCO3 ions, and H2O molecules. HCO3- ions are formed in the bulk of crystals, whereas water molecules are formed only in the surface layer. IR spectra offered no evidence of decomposition of CO32- ions into CO and CO2- and of formation of CO3- ions in the course of growth nor in the course of irradiation of CsI(CO3) and CsI(Tl, CO3) crystals. Electron activator colo r centers in CsI(Tl, CO3) crystals are likely to be stabilized by hole near -activator centers and by HCO3- ions produced in radiation-induced chemical reactions. (C) 2000 MAIK "Nauka/Interperiodica".