Angle dependent interaction potentials for NOAr, NOKr and NOXe derived from various total collision cross section data

• Published in: Chemical physics 1980-01, Vol.52 (1), p.211-225
• Main Authors: Thuis, H.H.W., Stolte, S., Reuss, J., Van Den Biesen, J.J.H., Van Den Meijdenberg, C.J.N.
• Format: Article
• Language: English
• ISSN: 0301-0104
• DOI: 10.1016/0301-0104(80)85199-8

Three independent sources of information are used to analyze the angle dependent potential for NOAr: (a) the glory structure of the total collision cross section; (b) the relative difference in the total collision cross section for two different orientations of NO in the 2Π 3 2 state; (c) the absolute value of the total collision cross section. The sudden approximation employed for the calculation of the various properties is discussed. For NOAr a fit to the total collision cross section data is obtained on the basis of an extended Maitland—Smith potential containing a P t anisotropy in the repulsion and a P 2 anisotropy in the repulsion and attraction. A comparison is made with the theoretical potential for NOAr recently by Nielson et al. and the extended Lennard-Jones potential employed in the earlier analysis. For NOKr and NOXe similar Maitland—Smith potentials are obtained by assuming the P t anisotropy parameter for these systems to be equal to that for NOAr. In a separate appendix is analyzed which intermolecular distances are probed through measurements of the anisotropy in the total collision cross section.