Resonance phenomena and threshold features in positron–helium scattering

doi:10.1088/1674-1056/21/5/053402

中国物理B ›› 2012, Vol. 21 ›› Issue (5): 53402-053402.doi: 10.1088/1674-1056/21/5/053402

• ATOMIC AND MOLECULAR PHYSICS • 上一篇下一篇

Resonance phenomena and threshold features in positron–helium scattering

于荣梅,程勇军,王旸,周雅君

The Academy of Fundamental and Interdisciplinary Sciences, Harbin Institute of Technology, Harbin 150081, China

收稿日期:2012-01-09 修回日期:2012-04-27 出版日期:2012-04-01 发布日期:2012-04-01
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 10674055)

Resonance phenomena and threshold features in positron–helium scattering

Yu Rong-Mei(于荣梅), Cheng Yong-Jun(程勇军), Wang Yang(王旸), and Zhou Ya-Jun(周雅君)^†

The Academy of Fundamental and Interdisciplinary Sciences, Harbin Institute of Technology, Harbin 150081, China

Received:2012-01-09 Revised:2012-04-27 Online:2012-04-01 Published:2012-04-01
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 10674055)

摘要/Abstract

摘要： Investigations of resonances and threshold behaviors in positron--helium scattering have been made using the momentum-space coupled-channels optical method. The positronium formation channels are considered via an equivalent-local complex potential. The s-wave resonances and the Wigner cusp feature at the positronium (n=1) formation threshold are compared with the previous reports. The p-and the d-wave resonances and a Wigner cusp feature at the positronium (n=2) formation threshold are reported for the first time.

关键词: positron, helium, resonance

Abstract: Investigations of resonances and threshold behaviors in positron--helium scattering have been made using the momentum-space coupled-channels optical method. The positronium formation channels are considered via an equivalent-local complex potential. The s-wave resonances and the Wigner cusp feature at the positronium (n=1) formation threshold are compared with the previous reports. The p-and the d-wave resonances and a Wigner cusp feature at the positronium (n=2) formation threshold are reported for the first time.

Key words: positron, helium, resonance

中图分类号: (Positron scattering)

34.80.Uv

于荣梅,程勇军,王旸,周雅君. Resonance phenomena and threshold features in positron–helium scattering[J]. 中国物理B, 2012, 21(5): 53402-053402.

Yu Rong-Mei(于荣梅), Cheng Yong-Jun(程勇军), Wang Yang(王旸), and Zhou Ya-Jun(周雅君) . Resonance phenomena and threshold features in positron–helium scattering[J]. Chin. Phys. B, 2012, 21(5): 53402-053402.

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Resonance phenomena and threshold features in positron–helium scattering

Resonance phenomena and threshold features in positron–helium scattering

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