Comparison of quasifree ($p$,$2p$) with ($p$,$\mathrm{pn}$) scattering as a check of the impulse approximation

It is shown that the ratio of the cross sections of quasifree ($p$,$2p$) and ($p$,$\mathrm{pn}$) reactions in complex nuclei for identical and suitable geometries can be reliably calculated in the distorted wave impulse approximation. A comparison with preliminary experimental results supports the validity of the impulse approximation for the medium energy scattering of nucleons.

NUCLEAR REACTIONS ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$($p$,$2p$), ($p$,$\mathrm{pn}$), $E=400\mathrm{}$ MeV, checked DWIA.