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Proceedings Paper

Use of lasers in the investigation of radiation-induced processes in the ionic crystals
Author(s): V. M. Lisitsyn; V. I. Korepanov; V. Yu. Yakovlev
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Paper Abstract

In the study of F-H pair formation in alkali halides due to excitation of the electronic subsystem, the information of short life time states of the self-trapped excitons plays an important role. In this paper we present recent achievements in such a direction obtained by using lasers. Short pulses of laser radiation are used in the measurement of transient absorption spectra obtained by band-to-band excitation and by selective optical conversion of the short-lived defects. With nanosecond luminescence spectroscopy in double-cascade excitation, we acquired data for KJ explaining the evolution (pi) 1 and (pi) 2 luminescence bands at different power laser pulses. We interprete these data in terms of frequent mutual transitions between 'on-' and 'off-center' equilibrium states of self-trapped excitons. The processes of energy transfer in self-trapped excitons connected with monomers of impurity ions in mixed crystal are studied. Also, impurity recombination luminescence is investigated in fractional annealing of Vk centers at 80-200 K. It is shown that luminescence intensity of heteronuclear excitons correlates with number of own but not with heteronuclear Vk centers. Impurity luminescence in these crystals occur at exciton with core of Cl2 type conversion to heteronuclear exciton.

Paper Details

Date Published: 23 August 1995
PDF: 6 pages
Proc. SPIE 2619, International Conference on Atomic and Molecular Pulsed Laser, (23 August 1995); doi: 10.1117/12.216916
Show Author Affiliations
V. M. Lisitsyn, Tomsk Polytechnical Univ. (Russia)
V. I. Korepanov, Tomsk Polytechnical Univ. (Russia)
V. Yu. Yakovlev, Tomsk Polytechnical Univ. (Russia)

Published in SPIE Proceedings Vol. 2619:
International Conference on Atomic and Molecular Pulsed Laser
Victor F. Tarasenko; Georgy V. Mayer; Gueorgii G. Petrash, Editor(s)

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