Abstract
The π- 12C optical potential is evaluated including the Fermi motion of the nucleons, first order binding corrections and nucleon-nucleon correlations. It appears clearly that the static and factorization approximations are not justified when incident pion kinetic energies are in the range 60–300 MeV. The usual Fermi averaging procedure is shown to be only partially adequate. However the calculated cross sections are not in good agreement with the experimental data. The absorptive part of the optical potential evaluated in this manner is still too weak at low energies.
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