Positron age–momentum correlation studies of free volumes in polymers |
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Authors: | K. Sato H. Murakami K. Ito K. Hirata Y. Kobayashi |
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Affiliation: | aDepartment of Environmental Science, Tokyo Gakugei University, Koganei, Tokyo 184-8501, Japan;bNational Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan |
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Abstract: | Positron age–momentum correlation (AMOC) spectroscopy, which can sensitively probe momentum distributions of positrons and positronium (Ps), was conducted for studying the pick-off process of the triplet bound state ortho-Ps (o-Ps) with electrons at the walls of the free volumes in polymers. Influences of different chemical elements forming free volume were investigated. It was found that the momentum distribution of o-Ps pick-off annihilation sensitively depends on the electronic state in the free volumes. The feasibility of the chemical analysis relevant to the free volume in polymers is discussed. |
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Keywords: | Positron Positronium Positron age– momentum correlation Polymer |
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