Experimental Test of the Factorization Approximation in the ReactionCa40(p, 2p)K39at 148.2 MeV

We present data for the reaction ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}(p, 2p){}_{}{}^{39}{}_{}{}^{}\mathrm{K}$ at 148.2 MeV. Energy sharing cross sections for the ${\frac{3}{2}}^{+}$ ground state and ${\mathrm{½}}^{+}$ excited state are well described by distorted-wave impulse-approximation calculations. An explicit comparison of the results of the factorization approximation with these experimental results provides considerable support for the usual distorted-wave impulse-approximation treatment.