Positron and Positronium Annihilation in Polymers Studied by Age-Momentum Correlation Spectroscopy

• Authors: K. Sato , H. Murakami , K. Ito , K. Hirata , Y. Kobayashi
• Languages of publication: EN

Abstracts

EN

Positron (e⁺) and positronium (Ps) annihilation processes in polymers are studied by positron age-momentum correlation spectroscopy, which can sensitively probe momentum distributions of e⁺, p-Ps, and o-Ps. For polyether sulfone and ethylene tetrafluoroethylene copolymer belonging to oxygen-containing polymers (O group) and fluorine-containing polymers (F group), respectively, significant effects of positron trapping by polar element are observed. The Doppler profile of o-Ps pick-off annihilation is strongly influenced by F atoms, giving rise to anomalous broadening. The results are discussed together with our previous data of the S-I₃ correlation in order to explore the feasibility of chemical analysis around the free volumes by age-momentum correlation spectroscopy.

Keywords

EN

71.60.+z; 78.70.Bj; 82.30.Gg; 42.70.jk

Discipline

• 78.70.Bj: Positron annihilation(for positron states, see 71.60.+z in electronic structure of bulk materials; for positronium chemistry, see 82.30.Gg in physical chemistry and chemical physics)
• 71.60.+z: Positron states(for positron annihilation, see 78.70.Bj)
• 82.30.Gg: Positronium chemistry(see also 36.10.Dr Positronium in atomic and molecular physics; 78.70.Bj Positron annihilation in interactions of particles and radiation with matter)

• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 113
• Issue: 5
• Pages: 1511-1516

Dates

published

2008-05

received

2007-09-03

Contributors

author

K. Sato

• Department of Environmental Sciences, Tokyo Gakugei University, Koganei, Tokyo 184-8501, Japan

author

H. Murakami

• Department of Environmental Sciences, Tokyo Gakugei University, Koganei, Tokyo 184-8501, Japan

author

K. Ito

• National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan

author

K. Hirata

• National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan

author

Y. Kobayashi

• National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan

References

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Identifiers

DOI

10.12693/APhysPolA.113.1511