EXCITION LUMINESCENCE OF LIH1-XFX SOLID-SOLUTIONS

Authors
POLIENKO AN PUSTOVAROV VA CHOLAKH SO BETENEKOVA TA
Citation
An. Polienko et al., EXCITION LUMINESCENCE OF LIH1-XFX SOLID-SOLUTIONS, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 359(1-2), 1995, pp. 334-335
Citations number
4
Categorie Soggetti
Nuclear Sciences & Tecnology","Physics, Particles & Fields","Instument & Instrumentation",Spectroscopy
Journal title
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment → ACNP
ISSN journal
01689002
Volume
359
Issue
1-2
Year of publication
1995
Pages
334 - 335
Database
ISI
SICI code
0168-9002(1995)359:1-2<334:ELOLS>2.0.ZU;2-2
Abstract
Excition states of LiH1-xFx in the exciton band of lithium hydride are investigated by optical methods. The measurements of the decay times of free and bound excitons in LiH1-xFx crystals were performed at the optical spectroscopy station in the SR channel on the VEPP-3 storage r ing. It was found that the spectra of the lowest-energy exciton band o f these crystals followed a persistent type of behaviour. The relation of exciton energy to solution composition points to the effect of sym metry changes of the conduction band bottom and the average sizes of l ithium hydride clusters. The structure of the luminescence spectra is determined by direct, indirect or disorder-assisted quasidirect transi tions with an increase of the fluorine content.