ABSOLUTE TOTAL CROSS-SECTIONS FOR ELASTIC-SCATTERING OF NE BY AR, KR, XE - CHARACTERIZATION OF LONG-RANGE INTERACTIONS

Absolute total elastic cross sections for Ne-Ar, Ne-Kr, and Ne-Xe collisions have been measured in the 0.5-1.4 km s-1 velocity range. The data have been analyzed on the basis of the Lennard-Jones (12,6) and Buckingham-Corner (6,8,10) potential models. For the long distance ranges mainly probed by the experiments, accurate model independent potential magnitudes have been determined. For Ne-Ar and Ne-Kr systems, semi-empirical calculations previously performed for the long range expansion terms yield potential values which overlap the present determination within the uncertainty limits. For Ne-Xe, a remarkable disagreement between experiment and calculations has been found. Multiparameter potentials previously obtained from differential scattering cross sections appear fairly to reproduce the glory amplitudes and locations. © 1978.