INVERSION OF HE-NE ELASTIC-SCATTERING DATA

Quantal and semiclassical (WKB) methods of inversion have been used in an analysis of the elastic-scattering cross sections for 62.5-meV He atoms from Ne atoms by which an effective local interaction between th ose atoms is specified. The potentials obtained by the approximate met hod (WKB) differ from that found with the full quantal analysis. The q uantal inversion potential is repulsive at short distances and becomes attractive at a radius of 2.695 Angstrom. It has a minimum value of - 1.981 meV at a radius of 2.98 Angstrom.