Irradiation damage of alkali halide crystals during positron bombardment
作者:
K.P. Arefiev,
V.P. Arefiev,
S.A. Vorobiev,
期刊:
Radiation Effects
(Taylor Available online 1978)
卷期:
Volume 36,
issue 3-4
页码: 141-147
ISSN:0033-7579
年代: 1978
DOI:10.1080/00337577808240844
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The bleaching effect of positron irradiation of KCl and KBr single crystals previously coloured with electrons or protons was investigated. Positrons injection in the coloured alkali halide samples reduces the F-centres 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 non-irradiated regions of the sample. Irradiation effects, due to positron source, on the peak counting rate of (γ-γ) 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.
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