HFS92: A program for relativistic atomic hyperfine structure calculations

Abstract We describe a program for the computation of magnetic dipole and electric quadrupole diagonal ( A J , B J ) and off-diagonal ( A J , J −1 , B J , J −1 , B J , J −2 ) hyperfine interaction constants. Approximate atomic wavefunctions are assumed to be linear combinations of configuration state functions, which are, in turn, constructed from four-component spin-orbitals to be many-particle eigenfunctions of the parity and angular momentum operators.