Differential cross sections of positron-hydrogen collisions

We make a detailed study on the angular differential cross sections of positron–hydrogen collisions by using the momentum-space coupled-channels optical（CCO） method for incident energies below the H ionization threshold. The target continuum and the positronium（Ps） formation channels are included in...

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Bibliographic Details
Published inChinese physics B Vol. 25; no. 7; pp. 204 - 208
Main Author 于荣梅 濮春英 黄晓玉 殷复荣 刘旭焱 焦利光 周雅君
Format Journal Article
LanguageEnglish
Published 01.07.2016
Subjects
入射能量
动量空间
微分截面
正电子
氢
电子偶素
碰撞角
耦合通道
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Summary:We make a detailed study on the angular differential cross sections of positron–hydrogen collisions by using the momentum-space coupled-channels optical（CCO） method for incident energies below the H ionization threshold. The target continuum and the positronium（Ps） formation channels are included in the coupled-channels calculations via a complex equivalent-local optical potential. The critical points, which show minima in the differential cross sections, as a function of the scattering angle and the incident energy are investigated. The resonances in the angular differential cross sections are reported for the first time in this energy range. The effects of the target continuum and the Ps formation channels on the different cross sections are discussed.
Bibliography:We make a detailed study on the angular differential cross sections of positron–hydrogen collisions by using the momentum-space coupled-channels optical（CCO） method for incident energies below the H ionization threshold. The target continuum and the positronium（Ps） formation channels are included in the coupled-channels calculations via a complex equivalent-local optical potential. The critical points, which show minima in the differential cross sections, as a function of the scattering angle and the incident energy are investigated. The resonances in the angular differential cross sections are reported for the first time in this energy range. The effects of the target continuum and the Ps formation channels on the different cross sections are discussed.
11-5639/O4
differential cross section resonance positron hydrogen
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/25/7/073401