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Positron annihilation in Ge-S glasses

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Abstract

Positron lifetime and Doppler broadening measurements have been carried out on GeS1.375 and GeS1.5 glasses. A pronounced decrease of the mean lifetime was observed at crystallization of GeS1.375 glass into the GeS structure. Also the Doppler-broadened curves are strongly sensitive to this solid-solid phase transition. Unlike the situation for many metals, the positron annihilation parameters were found non-sensitive to fast neutron irradiation doses as high as 1019 n/cm2. No difference between positron annihilation parameters measured on GeS1.375 and GeS1.5 glasses was found. The state of the positron in the GeS glasses is discussed on the basis of these results. The idea is put forward, that the GeS-GeS2 system provides possibilities of sample parameter variations that might prove useful in the understanding of the positron state in non-metallic solids.

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Authors and Affiliations

  1. Laboratory of Applied Physics II, The Technical University of Denmark, Lyngby, Denmark

    H. E. Hansen & K. Petersen

  2. Department of Nuclear Physics and Technics, Slovak Technical University, CS-88019, Bratislava, Czechoslovakia

    J. Topolsky

Authors
  1. H. E. Hansen
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  2. K. Petersen
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  3. J. Topolsky
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Hansen, H.E., Petersen, K. & Topolsky, J. Positron annihilation in Ge-S glasses. Appl. Phys. A 26, 35–38 (1981). https://doi.org/10.1007/BF01197675

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  • DOI: https://doi.org/10.1007/BF01197675

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