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Compositional dependences of average positron lifetime in binary As-S/Se glasses |
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| Authors: | A. IngramR. Golovchak M. KostrzewaS. Wacke M. ShpotyukO. Shpotyuk |
| Affiliation: | a Department of Physics of Opole University of Technology, 75 Ozimska str., Opole, PL-45370, Poland b Department of Materials Science and Engineering, Lehigh University, 5 East Packer Avenue, Bethlehem, PA 18015-3195, USA c Lviv Polytechnic National University, 12, Bandery str., Lviv, UA-79013, Ukraine d Institute of Physics of Jan Dlugosz University, 13/15al. Armii Krajowej, Czestochowa, PL-42201, Poland |
| Abstract: | Compositional dependence of average positron lifetime is studied systematically in typical representatives of binary As-S and As-Se glasses. This dependence is shown to be in opposite with molar volume evolution. The origin of this anomaly is discussed in terms of bond free solid angle concept applied to different types of structurally-intrinsic nanovoids in a glass. |
| Keywords: | Positron annihilation Molar volume Chalcogenide glass |
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