A SELF-CONSISTENT DESCRIPTION OF (P,2P) REACTIONS IN A RELATIVISTIC FINITE-RANGE DWIA MODEL

Cross sections and analyzing powers are calculated for the O-16(p,2p)N -15 and Ca-40(p, 2p)K-39 reactions at an incident energy of E-p = 200 MeV within the framework of the self-consistent and relativistic finit e-range distorted wave impulse approximation. The dynamics of the (p, 2p) reaction is, for the first time, treated in a self-consistent mann er, where single-particle bound state wave functions are calculated fi -om the relativistic mean-fields produced by the Dirac-Hartree model a nd distorted wave functions are calculated from the optical potentials obtained by folding nuclear densities with the Horowitz interaction. This model gives a unified description of the (p, 2p) reactions with d ifferent target nuclei using the same basic parameters, i.e., mass and coupling constants for sigma, omega and rho mesons, on which the Dira c-Hartree model depends. Our calculation results show that this model satisfactorily explains the observables for both reactions simultaneou sly. It is also shown that the self-consistent optical potentials empl oyed in this work are valid for a wide range of elastic proton energie s and give almost the same results for the observables, except for the ir 10 similar to 20% Smaller values for the cross sections when compar ed with the global Dirac optical potentials.