Accurate numerical solution of the Schrödinger and Dirac wave equations for central fields

Abstract We describe a FORTRAN 77 subroutine package which provides numerical solutions of the Schrödinger and Dirac equations for central fields. The potential energy is approximated by a cubic spline that interpolates a table of values provided by the user. The radial wave equations for the interpolated field are solved by using the power series method due to Bühring (Z. Phys. 187 (1965) 180). Radial wave functions, eigenvalues for bound states and phase shifts for free states are evaluated with a p... Title of program: RADWEQ Catalogue Id: ABTR_v1_0 Nature of problem This subroutine package provides numerical solutions of the Schrodinger and Dirac equations for central fields such that V(r)->0 when r-> infinity and rV(r) is finite for r=0. Radial wave functions, eigenvalues for bound states and phase shifts for free states are evaluated with a prescribed accuracy. Results are delivered to the main program after calling a single subroutine. Versions of this program held in the CPC repository in Mendeley Data ABTR_v1_0; RADWEQ; 10.1016/0010-4655(91)90122-2 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)