Variational calculation of positronium-helium-atom scattering length

被引：11
作者：
Adhikari, SK [1 ]
机构：
[1] Univ Estadual Paulista, Inst Fis Teor, BR-01405900 Sao Paulo, Brazil
来源：
PHYSICAL REVIEW A | 2001年 / 64卷 / 02期
关键词：
D O I：
10.1103/PhysRevA.64.022702
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present a variational basis-set calculational scheme for elastic scattering of positronium atom by helium atom in S wave and apply it to the calculation of the scattering length. Highly correlated trial functions with appropriate symmetry are used in this calculation. We report numerical result for the scattering length in atomic unit: (1.0+/-0.1)a(0). This corresponds to a zero-energy elastic cross section of (4.0+/-0.8)pia(0)(2).
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页数：6
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