DEPENDENCE OF POTENTIALS ON ATOMIC SHAPE RESONANCE FEATURES IN INDEPENDENT-PARTICLE APPROXIMATION .1.

A shape resonance corresponds to a quasi-bound state in an inner well potential followed by a positive barrier, characterized by the rapid v ariation of the wave function amplitude in a short range of energies. The barrier between the inner and outer wells results from the interpl ay between the centrifugal repulsion and the reduction of the screenin g in the inner region. Shape resonances are, therefore, quite sensitiv e to the details of the atomic potential. We study the suitability of various choices for the independent particle approximation potentials, including such issues as characterization by local exchange and use o f a Latter tail versus vacancy potentials. In general, the Hartee-Fock -Slater potential with a Latter tail model has more resonant-like peak s than the vacancy potential models. The counting of the electron-exch ange term in vacancy potential is checked.