Unnatural parity resonance states in positron-excited hydrogen scattering

doi:10.1088/1674-1056/21/12/123403

Abstract The coupled-channels optical method for positron scattering has been applied to investigate resonance states with unnatural parities in 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.

Keywords: positrons excited-hydrogen atom unnatural parity resonances positronium coupled-channels optical method

Received: 30 March 2012
Revised: 18 June 2012
Accepted manuscript online:

PACS:

34.80.Uv

(Positron scattering)

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

Corresponding Authors: Zhou Ya-Jun
E-mail: yajunzhou2003@yahoo.com.cn

Cite this article:

Ma Jia (马佳), Zhou Ya-Jun (周雅君), Wang Yuan-Cheng (王远成) Unnatural parity resonance states in positron-excited hydrogen scattering 2012 Chin. Phys. B 21 123403

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