GTOBAS: fitting continuum functions with Gaussian-type orbitals. A. Faure, J.D. Gorfinkiel, L.A. Morgan, J. Tennyson.

PROGRAM SUMMARY
Title of program: NUMCBAS
Catalogue identifier: ADPW
Ref. in CPC: 144(2002)224
Distribution format: tar gzip file
Operating system: Digital UNIX V5.0, IBM AIX 4.3.2.0
High speed store required: 0.1MK words
Number of bits in a word: 32
Number of lines in distributed program, including test data, etc: 882
Keywords: Bessel and Coulomb functions, Atomic physics, Electron scattering, Molecular physics.
Programming language used: Fortran
Computer: Compaq Alpha-DEC , IBM RS/6000 .

Nature of physical problem:
Evaluation/calculation of Bessel and Coulomb functions. Provides input for GTOBAS (this paper).

Method of solution:
Numerical integration of the Schrodinger equation from both boundaries and matching using de Vogelaere's algorithm.

Restrictions:
The program could in principle solve a model scattering problem with any kind of potential, although in its present form, only Coulomb potentials can be input.

Typical running time:
Typically, 0.03s.