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Positron annihilation lifetime spectroscopy combined with Doppler broadening of annihilation radiation was applied to study free-volume entities in Ge-Ga-S glasses having different amount of CsCl additives. It is shown that the structural changes caused by CsCl additives can be adequately described by positron trapping modes determined within two-state model. The results testify in a favor of rather...
Positron annihilation lifetime spectroscopy combined with Doppler broadening of annihilation radiation was applied to study free-volume entities in Ge-Ga-S glasses having different amount of CsCl additives. These results serve as a basis for new direction in the characterization of inner free-volume structure of chalcohalide glass-ceramics conditionally declared as Positronics.
The o-Ps-related modes are used for study of free-volume entities in nanostructured spinel MgAl2O4 ceramics after drying and water-immersion treatment. It is established that that water-sorption processes in magnesium aluminate ceramics leads to corresponding increase in positron trapping rates of extended defects located as addition phases near grain boundaries. These phase extractions and free-volume...
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