HFSZEEMAN swMATH ID: 1177 Software Authors: Martin Andersson, Per Jönsson Description: HFSZEEMAN A program for computing weak and intermediate field fine and hyperfine structure Zeeman splittings from MCDHF wave functions Given electronic wave functions generated by the grasp2K relativistic atomic structure package, this program calculates diagonal magnetic dipole AJ and electric quadrupole BJ hyperfine interaction constants and Landé gJ factors. In addition the program computes diagonal and off-diagonal reduced hyperfine and Zeeman matrix elements and constructs the total interaction matrix for an atom in an external magnetic field. By diagonalizing the interaction matrix and plotting eigenvalues as functions of the magnetic field, Zeeman splittings of hyperfine levels are obtained. The method is applicable in the weak and intermediate field regions and yields results that are useful when analyzing spectra from e.g. EBIT sources and magnetic stars. The program can also be used in the field free limit to calculate mixing coefficients that determine rates of hyperfine induced transitions. For atoms with zero nuclear spin I the program computes splittings of the fine-structure levels Homepage: http://cpc.cs.qub.ac.uk/summaries/ADZS_v1_0.html Programming Languages: Fortran, Matlab. Operating Systems: Unix, Linux. Keywords: Relativistic atomic wave functions; hyperfine structure; <i>A</i> and <i>B</i> factors; Landé <i>gJ</i> factor; Zeeman effect; Paschen-Back effect; magnetic field; multiconfiguration Dirac-Hartree-Fock+Breit. Related Software: grasp2k Cited in: 1 Document Standard Articles 1 Publication describing the Software, including 1 Publication in zbMATH Year HFSZEEMAN – a program for computing weak and intermediate field fine and hyperfine structure Zeeman splittings from MCDHF wave functions. Zbl 1196.81009Andersson, Martin; Jönsson, Per 2008 Cited by 2 Authors 1 Andersson, Martin 1 Jonsson, Per R. Cited in 1 Serial 1 Computer Physics Communications Cited in 1 Field 1 Quantum theory (81-XX) Citations by Year