ELECTRONIC EXCITATIONS AND UV LUMINESCENCE IN SRO CRYSTALS AT 8 K

Authors
FELDBACH E KINK R KIRM M LUSHCHIK A LUSHCHIK C LOHMUS A MAAROOS A MARTINSON I
Citation
E. Feldbach et al., ELECTRONIC EXCITATIONS AND UV LUMINESCENCE IN SRO CRYSTALS AT 8 K, Chemical physics letters, 241(5-6), 1995, pp. 597-602
Citations number
24
Categorie Soggetti
Physics, Atomic, Molecular & Chemical
Journal title
Chemical physics letters → ACNP
ISSN journal
00092614
Volume
241
Issue
5-6
Year of publication
1995
Pages
597 - 602
Database
ISI
SICI code
0009-2614(1995)241:5-6<597:EEAULI>2.0.ZU;2-L
Abstract
Reflection and luminescence excitation spectra (5-30 eV) were measured for freshly cleaved SrO at 8 K. An emission band at 4.95 eV is domina nt for a SrO crystal excited by photons in the region of fundamental a bsorption (5.6-30 eV). This emission is tentatively attributed to the radiative decay of self-trapped excitons. The emission at 5.03 eV is a ssigned to the excitons localized near barium impurity ions and is eff ectively excited by photons in the energy range 5.35-5.65 eV. The thre shold energy of the secondary electron-hole pair creation by hot photo electrons is estimated to be equal to E(th) = 13.5 +/- 0.3 eV for SrO at 8 K.