Elsevier

Physics Letters B

Volume 217, Issues 1–2, 19 January 1989, Pages 14-18
Physics Letters B

On the reactive content of the pion-nucleus optical potential at low energies

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Abstract

The energy dependence of the absorption parameters of the Stricker, McManus and Carr optical is discussed. An improved procedure of calculating the imaginary part of “single nucleon” parameters in a finite nucleus is propose. It is based on an approximate expression for the pion-nucleon scattering amplitude which includes structure effects. It is shown that the resulting potential with the pionic atom values for the absorption parameters provides a good description of the scattering data up to 50 MeV.

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