S-wave resonances in the positron-helium scattering

被引：13

作者：

Ren, Zhenzhong ^{[1
,2
]}

Han, Huili ^{[1
]}

Shi, Tingyun ^{[1
]}

机构：

[1] Chinese Acad Sci, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan Inst Phys & Math, Wuhan 430071, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2011年 / 44卷 / 06期

关键词：

B-SPLINES; HYDROGEN; ENERGY; COLLISIONS; THRESHOLD; SYSTEMS;

D O I：

10.1088/0953-4075/44/6/065204

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We have performed a three-body calculation for investigation of S-wave resonances in the positron-helium scattering in the hyperspherical coordinates. B-splines are used to obtain accurate hyperspherical potential curves and channel functions. An adiabatical hyperspherical approach is used to predict semi-quantitatively the position of the resonances. A multichannel calculation with the stabilization method is also used to extract accurately the positions and widths of resonances. We find four resonances associated with the He(+)-Ps(n = 2) channel. The resonance parameters for the lowest two resonances are in reasonable agreement with the calculations of Kar and Ho (2004 J. Phys. B: At. Mol. Opt. Phys. 37 3177), and two more new resonances below the Ps(n = 2) threshold are identified.

引用

页数：6

共 34 条

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