Differential Collision Cross-Section Measurements in the Elastic Scattering of Light Identical Molecules: Helium

Abstract

Differential collision cross sections in the elastic scattering of helium beams are reported. A supersonic room-temperature primary beam and a multichannel low-temperature secondary beam have been used. The first quantum oscillation has been resolved. The results are compared with cross sections computed numerically, describing the interaction by means of potentials previously reported in the literature. Computed predictions are in fair agreement with experimental results.