Abstract
A parameter-free spherical complex optical potential model is used to calculate the differential and total cross sections for the scattering of positrons by the NH3 molecules in the energy range 10 eV − 400 eV. The optical potential is constructed from a near-Hartree-Fock one-center expansion of ammonia (NH3) wave function and it is then treated exactly in a partial-wave analysis involving variable phase approach to extract complex phase shifts. The present theoretically calculated results show good agreement with the available experimental results for total cross sections at positron energy ≥ 30 eV.
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