Messungen der Geschwindigkeitsabhängigkeit totaler Streuquerschnitte für Atom-Atom-Stöße im Energiebereich zwischen 6 und 1000 eV

The velocity dependence of the total scattering cross sectionQ(v) for fast Cs, K, and Na beams scattered by Xe, Kr, and Ar has been measured for energies of 6 to 1000 eV. In all cases, the transition region between thev ^?2/5-dependence ofQ(v) (where the cross section is predominantly influenced by the attractive part of the potential) and the high energy behaviour (where the cross section is determined by the repulsive part of the potential) is observed. Values for the product?r _m of the potential well depth? and the equilibrium distancer _m are determined by comparing the measurements with calculations for a five parameter potential model.