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Microscopic description of the (p, pi -) continuum at intermediate proton energy.

The continuum spectra of the (p,..pi../sup -/) reaction on nuclei in the medium and heavy mass region at E/sub p/approx.200 MeV are studied in terms of the standard pion-absorption-production model. The threshold energy and the linear rise of the pion cross section with the excitation energy are reproduced. By including the medium effect on the rescattering pion and rho meson fields we can also account for the absolute value of the cross section.