Molecular interactions are examined in which the intermolecular potential energy surface is approximated by a series ofdgr;functions of appropriate integrated areas. The method is verified by comparisons with the results of other procedures. Thedgr;hyphen;function technique is found to require little computation time even for potentials approximated by60 dgr;functions. The dependence of flux conservation upon atomic masses is explored. The procedure is extended to include fourhyphen;body collinear interactions.
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