Positronium formed by recombination of positron-electron pairs in polymers

被引：60
|
作者：
Sato, K.
Shanai, D.
Hotani, Y.
Ougizawa, T.
Ito, K.
Hirata, K.
Kobayashi, Y.
机构：
[1] Tokyo Inst Technol, Dept Organ & Polymer Mat, Meguro Ku, Tokyo 1528552, Japan
[2] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058565, Japan
来源：
PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 22期
关键词：
D O I：
10.1103/PhysRevLett.96.228302
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In nonpolar polymers, positronium (Ps) is dominantly formed by fast intraspur reactions of the energetic positron, but its formation is partially contributed by recombination of weakly bound Mott-Wannier-like positron-electron pairs and is susceptible to electric field and positron irradiation induced perturbations. The average initial energy of para-Ps (p-Ps) formed by recombination is found to be about half the energy of ordinary p-Ps dominantly formed by the fast intraspur reactions.
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页数：4
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