ABINITIO METHOD FOR CALCULATING TOTAL CROSS-SECTIONS

被引：15

作者：

BHATIA, AK ^{[1
]}

SCHNEIDER, BI ^{[1
]}

TEMKIN, A ^{[1
]}

机构：

[1] NATL SCI FDN,DIV PHYS,WASHINGTON,DC 20550

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.70.1936

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A method for calculating total cross sections without formally including nonelastic channels is presented. The idea is to use a one channel T-matrix variational principle with a complex correlation function. The derived T matrix is therefore not unitary: Elastic scattering is calculated from \T\2, but total scattering is derived from the imaginary part of T using the optical theorem. The method is applied to the spherically symmetric model of electron-hydrogen scattering. No spurious structure arises; results for sigma(el) and sigma(total) are in excellent agreement with calculations of Callaway and Oza. The method has wide potential applicability.

引用

页码：1936 / 1939

页数：4

共 21 条

[1] CALCULATION OF AUTOIONIZATION OF HE AND H- USING PROJECTION-OPERATOR FORMALISM [J].