An intermolecular potential for nitrogen from a multi-property analysis

New measurements are reported for the velocity dependence of the integral cross-section for N2–N2 scattering showing the glory oscillations. These data are analysed along with recent high precision second-virial coefficient data and traditional transport property measurements to yield an improved N2–N2 potential energy surface by adjusting certain parameters in the fit to this surface by van der Avoird et al. The new potential gives improved agreement with the integral cross-section, virial and transport data. Transport and relaxation cross-sections sensitive to anisotropy are very close to those obtained previously using the van der Avoird et al. surface. New comparisons with rotational relaxation and NMR relaxation data are reported.

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