Summary
The elastic scattering of positrons by helium and neon atoms is investigated within the framework of the variational static approximation. This method considers the mean static field of the atom and also considers the short-range forces experienced by the incident particle. A trial function including 16 terms is taken to depend on the positron-nucleus separation only to allow for correlation terms. Model potentials are used to describe the interaction between positrons and considered atoms. For each impact energy, the phase shifts of the seven lowest partial waves are obtained using a polarization potential of Buckingham type. Results of the phase shifts and cross-sections show a good agreement with other theoretical calculations as well as experimental measurements.
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Elkilany, S.A. Elastic scattering of positrons by helium and neon atoms. Nuov Cim A 109, 1–8 (1996). https://doi.org/10.1007/BF02734424
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DOI: https://doi.org/10.1007/BF02734424