Abstract
The summed-energy spectra obtained in a 600 MeV (p, 2p) experiment on 12C, 28Si and 40Ca have been analysed so that a large amount of the information from a non-symmetric coplanar experiment is utilized. The experimental cross section is integrated over a selected interval in the summed-energy spectrum and presented as a function of the polar angle, θ R and of the momentum, p R, of the residual nucleus. By comparing the distributions of the experimental cross sections to p R and θ R distributions calculated in the distorted-wave impulse approximation, DWIA, information is obtained on distortion effects and on rms radii for the various shell-model states contained in the summed-energy spectra. The DWIA calculations reproduce quite well the experimental distributions for the outer shells, while for the 1s shell in 28Si and 40Ca too large values of the proton occupation numbers are found.
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