Quasielastic electron scattering in relativistic mean-field theory
Department of Technical Physics, and MOE Key Laboratory of Heavy Ion Physics, Peking University, 100871, Beijing, PRC
2 Center of Nuclear Theoretical Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, 730000, Lanzhou, PRC
Accepted: 3 March 2005
Published online: 19 April 2005
The density-dependent relativistic hadron (DDRH) field theory proposed recently is extended to investigate the longitudinal response function and the Coulomb sum rule in quasielastic electron scattering in the relativistic random phase approximation (RPA). The results in the DDRH model are compared with those in other models systematically. It is found that meson effective masses induced by the nonlinear terms in the nonlinear Walecka model should be used to obtain the meson Green’s functions when the longitudinal response function and the Coulomb sum rule are calculated. The effects of the δ and ρ mesons are clearly shown in quasielastic electron scattering, and the isospin-dependent attractive potential between nucleons due to the exchange of the δ-meson cancels the isospin-dependent repulsive contribution of the ρ-meson to a certain extent. The obtained results in the DDRH model are in good agreement with experimental data except for the Coulomb sum rule in 208Pb.
PACS: 25.30.Fj Inelastic electron scattering to continuum – / 21.65.+f Nuclear matter – / 21.10.-k Properties of nuclei; nuclear energy levels – / 21.60.-n Nuclear structure models and methods –
© Società Italiana di Fisica and Springer-Verlag, 2005