# MCBP - A program to calculate angular coefficients of the breit interaction between electrons in the low energy limit

## Description

Title of program: MCBP-BREIT ANGULAR COEFFICIENTS Catalogue Id: AAAL_v1_0 Nature of problem The retarded interaction between a pair of electrons makes a non- negligible contribution to atomic energy levels especially in processes such as X-ray emission and absorption and Auger spectroscopy, involving inner shell holes. This program handles the algebraic part of this calculation using the formulation of Grant and Pyper and lists the coefficients of radial integrals in a form suitable for use with the wavefunctions produced by multiconfiguration Dirac-Fock programs, such as that of Grant ... Versions of this program held in the CPC repository in Mendeley Data AAAL_v1_0; MCBP-BREIT ANGULAR COEFFICIENTS; 10.1016/0010-4655(79)90116-4 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)