DIRECT EXCITATION OF IMPURITY CENTERS BY HOT PHOTOELECTRONS IN IONIC-CRYSTALS

Authors
LUSHCHIK A KAMADA M KIRM M LUSHCHIK C MARTINSON I
Citation
A. Lushchik et al., DIRECT EXCITATION OF IMPURITY CENTERS BY HOT PHOTOELECTRONS IN IONIC-CRYSTALS, Radiation measurements, 29(3-4), 1998, pp. 229-234
Citations number
18
Categorie Soggetti
Nuclear Sciences & Tecnology
Journal title
Radiation measurements → ACNP
ISSN journal
13504487
Volume
29
Issue
3-4
Year of publication
1998
Pages
229 - 234
Database
ISI
SICI code
1350-4487(1998)29:3-4<229:DEOICB>2.0.ZU;2-O
Abstract
The excitation spectra of luminescence of Ag+ and Tl+ centres as well as of self-trapped excitons have been measured in a spectral region fr om 5 to 30 eV for RbCl:Ag and RbCl:Tl crystals at 8 K. The comparative analysis of these spectra and photoelectric characteristics of RbCl t hin films confirms that the effect of impurity centre excitation by ho t conduction electrons exists in wide-gap ionic crystals. Hot photoele ctrons excite Ag+ and Tl+ impurity ions and also create near-impurity electronic excitations. Possible application of fast processes with th e participation of hot photoelectrons and hot photoholes in luminescen t detectors of radiation are discussed. (C) 1998 Elsevier Science Ltd. All rights reserved.