Use of lasers in the investigation of radiation-induced processes in the ionic crystals

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

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 π 1 and π 2 luminescence bands at different power laser pulses. We interpret 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 V k centers at 80-200 K. It is shown that luminescence intensity of heteronuclear excitons correlates with number of own but not with heteronuclear V k centers. Impurity luminescence in these crystals occur at exciton with core of Cl 2 type conversion to heteronuclear exciton.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Pages264-269
Number of pages6
Volume2619
Publication statusPublished - 1995
EventInternational Conference on Atomic and Molecular Pulsed Lasers - Tomsk, Russia
Duration: 27 Mar 199530 Mar 1995

Other

OtherInternational Conference on Atomic and Molecular Pulsed Lasers
CityTomsk, Russia
Period27.3.9530.3.95

Fingerprint

ionic crystals
Excitons
excitons
Luminescence
Radiation
Crystals
luminescence
Lasers
radiation
lasers
Impurities
impurities
Laser pulses
excitation
Alkali halides
mixed crystals
Laser radiation
alkali halides
pulses
Energy transfer

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Lisitsyn, V. M., Korepanov, V. I., & Yakovlev, V. Y. (1995). Use of lasers in the investigation of radiation-induced processes in the ionic crystals. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 2619, pp. 264-269)

Use of lasers in the investigation of radiation-induced processes in the ionic crystals. / Lisitsyn, V. M.; Korepanov, V. I.; Yakovlev, V. Y.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 2619 1995. p. 264-269.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Lisitsyn, VM, Korepanov, VI & Yakovlev, VY 1995, Use of lasers in the investigation of radiation-induced processes in the ionic crystals. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 2619, pp. 264-269, International Conference on Atomic and Molecular Pulsed Lasers, Tomsk, Russia, 27.3.95.
Lisitsyn VM, Korepanov VI, Yakovlev VY. Use of lasers in the investigation of radiation-induced processes in the ionic crystals. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 2619. 1995. p. 264-269
Lisitsyn, V. M. ; Korepanov, V. I. ; Yakovlev, V. Y. / Use of lasers in the investigation of radiation-induced processes in the ionic crystals. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 2619 1995. pp. 264-269
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N2 - 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 π 1 and π 2 luminescence bands at different power laser pulses. We interpret 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 V k centers at 80-200 K. It is shown that luminescence intensity of heteronuclear excitons correlates with number of own but not with heteronuclear V k centers. Impurity luminescence in these crystals occur at exciton with core of Cl 2 type conversion to heteronuclear exciton.

AB - 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 π 1 and π 2 luminescence bands at different power laser pulses. We interpret 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 V k centers at 80-200 K. It is shown that luminescence intensity of heteronuclear excitons correlates with number of own but not with heteronuclear V k centers. Impurity luminescence in these crystals occur at exciton with core of Cl 2 type conversion to heteronuclear exciton.

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