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Manuscript Title: Rate constants and cross sections for vibrational transitions in atom- diatom and diatom-diatom collisions.
Authors: G.D. Billing
Program title: ADIAV
Catalogue identifier: ACFU_v1_0
Distribution format: gz
Journal reference: Comput. Phys. Commun. 32(1984)45
Programming language: Fortran.
Computer: UNIVAC 1110/82.
Operating system: EXEC 8.
RAM: 33K words
Word size: 36
Keywords: Molecular physics, Scattering, Rotational energy Transfer, Atom-diatom collisions, V-t/r rateconstants, Elastic.
Classification: 16.7.

Nature of problem:
Translational and rotational degrees of freedom are treated by classical mechanics whereas the vibrational motion of the diatom is quantized.

Solution method:
A set of coupled first order differential equations are integrated by a standard Hamming predictor corrector method and Monte Carlo averaging is performed over initial variables.

Unusual features:
The program uses two subroutines which must be supplied by the system library. Furthermore one user supplied subroutine is called (see long write up).

Running time:
From a few seconds to a few minutes per trajectory.