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Manuscript Title: LMD: calculation of longitudinal momentum distributions in the single ionization of helium by ion impact.
Authors: S.F.C. O'Rourke, D.S.F. Crothers
Program title: LMD
Catalogue identifier: ACJT_v2_0
Distribution format: gz
Journal reference: Comput. Phys. Commun. 109(1998)184
Programming language: Fortran.
Computer: DEC 2000-500.
Operating system: Unix Version 4.0.
Word size: 32
Keywords: Molecular physics, Scattering, Elastic, Single ionization, Longitudinal momentum Distributions, Continuum-distorted-wave, Model, Continuum-distorted-wave, Eikonal-initial-state, Model, Helium target, Recoil-ion Momentum spectroscopy.
Classification: 16.7.

Nature of problem:
LMD calculates the singly differential cross sections of the longitudinal momentum distributions of the ejected electron and recoil-ion in single ionization of helium by either light or heavy-ion impact.

Solution method:
LMD allows the user to calculate the longitudinal momentum distributions using either the continuum-distorted-wave (CDW) model [1] or the continuum-distorted-wave eikonal-initial-state (CDW-EIS) model [2] using a wave treatment.

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

Running time:
This typically depends on input data. However to obtain an accurate (three significant figures) singly differential cross section for the longitudinal momentum distributions takes about one minute on the DEC 2000-500.

[1] S.F.C. O'Rourke and D.S.F. Crothers, J. Phys. B: At. Mol. Opt. Phys. 30 (1997) 2443.
[2] P.D. Fainstein, V.H. Ponce and R.D. Rivarola, J. Phys. B: At. Mol. Opt. Phys. 21 (1988) 287.