The anisotropy of the intermolecular potential for H2—inert gas systems,determined from total collision cross section measurements with state selected molecules; potential models and their anisotropy parameters

Total collision cross section measurements with a state selected H₂ beam are discussed in terms of a V₂ (R) P₂ (cos?) angle dependent part of the intermolecular potential. It is shown that the V₂ (R) factor has a shallow minimum ?₂ of about 10% of the angle averaged well depth ?; its position R_e2 is displaced a few percent to larger distances, with respect to the position R_e of the angle averaged minimum.