A Self-Consistent Description of (p,2p) Reactions in a Relativistic Finite-Range DWIA Model : Nuclear Physics)

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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 finite-range distorted wave impulse approximation. The dynamics of the (p,2p) reaction is, for the first time, treated in a self-consistent manner, where single-particle bound state wave functions are calculated from the relativistic mean-fields produced by the Dirac-Hartree model and 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 different target nuclei using the same basic parameters, i.e., mass and coupling constants for σ, ω and ρ mesons, on which the Dirac-Hartree model depends. Our calculation results show that this model satisfactorily explains the observables for both reactions simultaneously. It is also shown that the self-consistent optical potentials employed in this work are valid for a wide range of elastic proton energies and give almost the same results for the observables, except for their 10 〜20% smaller values for the cross sections when compared with the global Dirac optical potentials.
理論物理学刊行会の論文
1998-07-25