A new fitting law for :he primary set of rate constants. .Q+\_o, occurring in lOSA fxtorkation is prcscnted. Assuming thnt the interaction potential is donlioated by ZI single tern] of the Legendre polynonkd expansion. PA(cos 0). we find k~-,o = C[ (a/n) io\_g(aht) -oh + I]. The two fitting paramete
Computational test of fitting laws for rotational energy transfer
โ Scribed by A. Ticktin; B.J. Whitaker; A.J. McCaffery
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- English
- Weight
- 381 KB
- Volume
- 139
- Category
- Article
- ISSN
- 0009-2614
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โฆ Synopsis
Fully close-coupled quantum scattering calculations of rotational energy transfer cross sections for the N,-He, Ar, and Xe collision systems have been performed at a number of collision energies up to 300 cm-'. The results of these calculations are then fitted using the energy-dependent AON fitting law, and the fitted parameters are compared to the parameters of model potentials used in the CC calculations. Good agreement is observed between "input" and "recovered" parameters in all but one case (N2-Ar; j=2+4) for which the role of torque averaging is discussed.
๐ SIMILAR VOLUMES
A test of a quantum adiabatic treatment of rotational energy for the calculation ofvibrational/rotational energies and dynamics of polyatomic molecules is presented. The approach is given in detail for triatomic systems, where it is shown, in the symmetrictop limit, to be the quantum analog of an ea