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Manuscript Title: A program for computing autoionization properties.
Authors: C.F. Fischer, T. Brage
Program title: MCHF_AUTO
Catalogue identifier: ACLD_v1_0
Distribution format: gz
Journal reference: Comput. Phys. Commun. 74(1993)381
Programming language: Fortran.
Computer: VAX 11/780.
Operating system: VMS, Sun UNIX.
RAM: 514K words
Word size: 32
Peripherals: disc.
Keywords: Atomic physics, Structure, Autoionization, Line widths, Dielectronic Recombination, Electron emission, Resonances, Complex atoms, Functions wave, Continuum processes.
Classification: 2.1.

Subprograms used:
Cat Id Title Reference
ABZU_v1_0 MCHF_LIBRARIES CPC 64(1991)399
ABZV_v1_0 MCHF_GENCL CPC 64(1991)406
ABZW_v1_0 MCHF_NONH CPC 64(1991)417
ABZX_v1_0 MCHF_88 CPC 64(1991)431
ABZY_v1_0 MCHF_BREIT CPC 64(1991)455
ABZZ_v1_0 MCHF_CI CPC 64(1991)473
ACBA_v1_0 MCHF_MLTPOL CPC 64(1991)486
ACBB_v1_0 MCHF_LSTR AND MCHF_LSJTR CPC 64(1991)501

Nature of problem:
This program is an extension of the MCHF atomic structure package to calculations of autoionization rates and line widths.

Solution method:
Given a configuration list, radial functions and energies for one or more discrete states, in an LS or LSJ scheme, the program solves the Hartree-Fock equation for a continuum orbital. This is used to calculate the interaction element between the discrete state and the open channel. From this a number of different autoionization properties can be obtained by using the "Golden Rule" (U.Fano, Phys. Rev. 124(1961) 1866).

Restrictions:
The dimensions of the atomic structure package restrict the number of configuration states to 100, but this can readily be changed. Only one continuum orbital is allowed.

Unusual features:
Some non-orthogonalities are allowed (C.F. Fischer, Comp. Phys. Commun 64(1991)369). Exchange interaction within the core can be included.

Running time:
The CPU time required for the test run is 1.1 seconds for the first case and 29.1 seconds for the second on a SUN SPARC-station 330.