Irradiation damage of alkali halide crystals during positron bombardment

K. P. Arefiev, V. P. Arefiev, S. A. Vorobiev

Research output: Contribution to journalArticle

Abstract

The bleaching effect of positron irradiation of KCl and KBr single crystals previously colored with electrons or protons was investigated. Positrons injection in the colored alkali halide samples reduces the F-centers concentration considerably. For KCl crystals thicker than the positrons range the appearance of additional bands in the absorption spectra is noticeable. The experimental data show that the bleaching phenomenon should be observed merely throughout the positron exposure both for irradiated and nonirradiated regions of the sample. Irradiation effects, due to positron source, on the peak counting rate of ( gamma - gamma ) angular correlation in KCl crystals under applied magnetic field were also investigated. The growth of peak counting rate shows the increase of positronium-like states formation near defects of cation sublattice.

Original languageEnglish
Pages (from-to)141-147
Number of pages7
JournalRadiation Effects
Volume36
Issue number3-4
DOIs
Publication statusPublished - 1 Jan 1978

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Alkali halides
Positrons
Irradiation
Crystals
Bleaching
Absorption spectra
Protons
Positive ions
Single crystals
Magnetic fields
Defects
Electrons

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Irradiation damage of alkali halide crystals during positron bombardment. / Arefiev, K. P.; Arefiev, V. P.; Vorobiev, S. A.

In: Radiation Effects, Vol. 36, No. 3-4, 01.01.1978, p. 141-147.

Research output: Contribution to journalArticle

Arefiev, K. P. ; Arefiev, V. P. ; Vorobiev, S. A. / Irradiation damage of alkali halide crystals during positron bombardment. In: Radiation Effects. 1978 ; Vol. 36, No. 3-4. pp. 141-147.
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