Off-Shell Structures of Nucleon-Nucleon t-matrices and their Influence on Nucleon-Nucleus Elastic Scattering Observables

Abstract

The sensitivity of nucleon-nucleus elastic scattering observables to the off-shell structure of nucleon-nucleon t-matrices, derived from realistic NN potentials, is investigated within the context of a full-folding model based on the impulse approximation. Our study uses recently developed NN potential models, which describe a subset of the NN data base with a ${\chi }^2$ per datum $\sim$1, which means that the NN t-matrices are essentially on-shell equivalent. We calculate proton-nucleus elastic scattering observables for ${}^{16}$O, ${}^{40}$Ca, and ${}^{208}$Pb between 100 and 200 MeV laboratory energy. We find that the elastic scattering observables are insensitive to off-shell differences of the employed NN t-matrices. A more detailed investigation of the scattering equation and the optical potential as given in a factorized approximation reveals that the elastic scattering observables do not sample the NN t-matrices very far off-shell where they exhibit differences.

12 pages, LaTeX (RevTex), 11 Figures

References in corpus (1)

• Energy Dependence of the NN t-matrix in the Optical Potential for Elastic Nucleon-Nucleus Scattering

Cited by in corpus (15)

• The Brieva-Rook Localization of the Microscopic Nucleon-Nucleus Potential
• An isospin dependent global nucleon-nucleus optical model at intermediate energies
• Microscopic optical potentials derived from ab initio translationally invariant nonlocal one-body densities
• Theoretical Optical Potential Derived From Nucleon-Nucleon Chiral Potentials
• Self-consistent microscopic description of neutron scattering by ${}^{16}$O based on the continuum particle-vibration coupling method
• Microscopic calculations of medium effects for 200-MeV (p,p') reactions
• Phaseshift equivalent NN potentials and the deuteron
• Impact of Three-Body Forces on Elastic Nucleon-Nucleus Scattering Observables
• SWANLOP : Scattering waves off nonlocal optical potentials in the presence of Coulomb interactions
• Irreducible nonlocality of optical model potentials based on realistic NN interactions
• Two-Nucleon Scattering without partial waves using a momentum space Argonne V18 interaction
• Ab initio nucleon-nucleus elastic scattering with chiral effective field theory uncertainties
• Low lying excited states of ${}^{24}$O investigated by self-consistent microscopic description of proton inelastic scattering
• Ultraviolet suppression and nonlocality in optical model potentials for nucleon-nucleus scattering
• Microscopic Optical Potentials: recent achievements and future perspectives