Modification of nucleon-nucleon interactions in nuclear medium and neutron densities extracted via proton elastic scattering at intermediate energies

Details Modification of nucleon-nucleon interactions in nuclear medium and neutron densities extracted via proton elastic scattering at intermediate energies Modification of nucleon-nucleon interactions in nuclear medium and neutron densities extracted via proton elastic scattering at intermediate energies

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003mfsku..44....1t&link_type=abstract

Memoirs of the Faculty of Science, Kyoto University, Series of Physics, Astrophysics, Geophysics and Chemistry, (ISSN 0368-9689)

Physics

Atomic Physics

Atomic Physics

Scientific paper

Spin rotation parameters of proton elastic scattering from 58Ni have been measured at Ep=200, 300 and 400 MeV. By combining them with the previously measured cross sections and analyzing powers at the same energies, the series of measurements has become the "complete" experiment. Cross sections and analyzing powers of proton elastic scattering from 58Ni at 250 MeV, those of 120Sn at Ep=200, 250, 300 and 400 MeV and spin rotation parameters of 120Sn at Ep=300 MeV have been also newly measured. The experiment has been performed at Research Center for Nuclear Phyiscs, Osaka University. In order to explain the 58Ni data, it has been necessary to use realistic density distributions deduced from the nuclear charge distribution and to modify coupling constants and masses of σ and ω mesons. For 120Sn, we have assumed the same modification and used the proton distribution deduced from the charge distribution, we have searched the neutron density distribution which has reproduced 120Sn data at 300 MeV. The deduced neutron distribution has an increase at the nuclear center, which seems to be due to wave functions of neutrons in the 3s1/2 orbit. It also explains the 120Sn data at other energies than 300 MeV. Effects of ρ meson modifications on neutron densities are also mentioned.

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