# A program to compute the angular coefficients of the relativistic one-electron hyperfine structure parameters

## Description

Abstract The Chfs program calculates the angular coefficients α^(k_s k_1)and β^(k_s k_l)_(nl)of the relativistic one-electron hyperfine structure parameters for the case of pure SL-coupling or, alternatively, the case of intermediate coupling. The calculation is based on SL-basis states and, optionally, mixing coefficients of the electronic wave functions of atoms. The derivation of the necessary matrix elements is based on the effective tensor operator formalism; explicit expressions are... Title of program: Chfs Catalogue Id: ADBV_v1_0 Nature of problem The atomic hyperfine structure splitting is characterized by the hyper- fine interaction constants A and B. Within the effective tensor operator formalism [1] ... CORRECTION SUMMARY: Vol:Year:Page 103:1997:97 "000ACORRECTION 18/11/96" "A program to compute the angular coefficients of the relativistic one- electron hyperfine structure parameters. (C.P.C. 90(1995)381)." S. Kroger; M. Kroger Note: correction instructions are contained in source code Versions of this program held in the CPC repository in Mendeley Data ADBV_v1_0; Chfs; 10.1016/0010-4655(95)00078-T This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)