Unnatural parity resonance states in positron-excited hydrogen scattering  

作　　者：马佳 周雅君 王远成 

机构地区：[1]Center for Theoretical Atomic and Molecular Physics,Academy of Fundamental and Interdisciplinary Sciences,Harbin Institute of Technology

出　　处：《Chinese Physics B》2012年第12期207-211,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.10674055)

摘　　要：The coupled-channels optical method for positron scattering has been applied to investigate resonance states with unnatural parities in a positron-excited hydrogen system. The positronium formation channels and continuum channel are included via a complex equivalent local potential. Resonance states with angular momenta L =- 1 to L = 2 and parities （-1）L＋1 are calculated. Resonance energies and widths are reported and compared with other theoretical calculations. We found that the opening positronium formation channels play an important role in forming nondipole Feshbach resonances.The coupled-channels optical method for positron scattering has been applied to investigate resonance states with unnatural parities in a positron-excited hydrogen system. The positronium formation channels and continuum channel are included via a complex equivalent local potential. Resonance states with angular momenta L =- 1 to L = 2 and parities （-1）L＋1 are calculated. Resonance energies and widths are reported and compared with other theoretical calculations. We found that the opening positronium formation channels play an important role in forming nondipole Feshbach resonances.

关 键 词：positrons excited-hydrogen atom unnatural parity resonances POSITRONIUM coupled-channels optical method 

分 类 号：TN304[电子电信—物理电子学]