SUBPICOSECOND ABSORPTION-SPECTROSCOPY OF BAND-GAP EXCITATION AND DEFECT FORMATION IN ALKALI-HALIDE CRYSTALS

Authors
THOMA ED YOCHUM HM SHELDON PA WILLIAMS RT
Citation
Ed. Thoma et al., SUBPICOSECOND ABSORPTION-SPECTROSCOPY OF BAND-GAP EXCITATION AND DEFECT FORMATION IN ALKALI-HALIDE CRYSTALS, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 141(1-4), 1998, pp. 552-554
Citations number
5
Categorie Soggetti
Instument & Instrumentation","Nuclear Sciences & Tecnology","Physics, Atomic, Molecular & Chemical","Physics, Nuclear
Journal title
Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms → ACNP
ISSN journal
0168583X
Volume
141
Issue
1-4
Year of publication
1998
Pages
552 - 554
Database
ISI
SICI code
0168-583X(1998)141:1-4<552:SAOBEA>2.0.ZU;2-Z
Abstract
On the time scale of a few hundred femtoseconds to a few picoseconds a fter electron-hole pair creation in alkali halides, observations have revealed aspects of the growth and evolution of some familiar defect a nd self-trapped exciton (STE) absorption bands, as well as absorption features at the earliest time which may be related to vibrationally ho t and relaxing two-center self-trapped holes (B band). We present the first observation of a B band in CsBr, and present observations of typ e II STE, type III STE, and F center absorption formed in NaCl after e lectron-hole pair generation. (C) 1998 Elsevier Science B.V. All right s reserved.