Observation of orbiting resonances in the scattering of He+Ne

Abstract
Experimental total cross section measurements for the He+Ne atom pairs are presented over the relative velocity range of 88 to 1200 m/sec. One orbiting resonance is observed at 160 m/sec. The data around 100 m/sec are consistent with the existence of another resonance at 88 m/sec. A comparison of experimental results to calculated cross sections gives the best fit for the HFD potential. This fit suggest that the lowest velocity resonance is from an l=3 partial wave, while the higher velocity resonance is from an l=4 partial wave.