03Mpi00 ion-atom/argon - calculation of ionization cross sections by fast ion impact for neutral target atoms ranging from hyd. D.M. McSherry, S.F.C. O'Rourke, D.S.F. Crothers.

PROGRAM SUMMARY
Title of program: ARGON
Catalogue identifier: ADSE
Ref. in CPC: 155(2003)144
Distribution format: tar gzip file
Operating system: Red-hat Linux,Digital UNIX,AIX,SolarisSunOS5.7
Number of bits in a word: 64
Number of lines in distributed program, including test data, etc: 4510
Keywords: single Ionization, Cross sections, Target atoms, Continuum-distorted -wave model, Wave treatment, eikonal-initial-state model, Molecule, Scattering, Elastic.
Programming language used: Fortran 90/MPI
Computer: DEC Alpha 21164 , IBM SP2 , SUN Enterprise 3500 .

Nature of physical problem:
The code calculates total and differential cross sections for the single ionization of target atoms ranging from hydrogen up to and including argon by both light and heavy ion impact.

Method of solution:
ARGON allows the user to calculate the cross-sections using either the CDW or CDW-EIS models within the wave treatment.

Restrictions:
Both the CDW and CDW-EIS models are two-state perturbative approximations.

Typical running time:
Times vary according to the input data and number of processors. For one processor the test input data for double differential cross sections (40 points) took less than one second, whereas the test input for total cross sections (20 points) took 32 minutes.