Published March 29, 1993
| Version v1
Journal article
Ab initio method for calculating total cross sections
- 1. Physics Division, National Science Foundation, Washington, D.C. 20550 (United States)
- 2. Goddard Space Flight Center, Code 680, NASA, Greenbelt, Maryland 20771 (United States)
Description
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 σel and σtotal are in excellent agreement with calculations of Callaway and Oza. The method has wide potential applicability
Additional details
Publishing Information
- Journal Title
- Physical Review Letters
- Journal Volume
- 70
- Journal Issue
- 13
- Journal Page Range
- p. 1936-1939.
- ISSN
- 0031-9007
- CODEN
- PRLTAO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 24052216
- Subject category
- S74: ATOMIC AND MOLECULAR PHYSICS;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- CALCULATION METHODS; CORRELATION FUNCTIONS; ELASTIC SCATTERING; ELECTRON-ATOM COLLISIONS; HYDROGEN; S MATRIX; THEORETICAL DATA; TOTAL CROSS SECTIONS; USES; VARIATIONAL METHODS
- Descriptors DEC
- ATOM COLLISIONS; COLLISIONS; CROSS SECTIONS; DATA; ELECTRON COLLISIONS; ELEMENTS; FUNCTIONS; INFORMATION; MATRICES; NONMETALS; NUMERICAL DATA; SCATTERING