Bochum 2009 – wissenschaftliches Programm

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HK: Fachverband Hadronen und Kerne

HK 50: Nuclear Astrophysics

HK 50.2: Vortrag

Mittwoch, 18. März 2009, 14:30–14:45, H-ZO 60

Elastic Scattering of ⁷Be and ⁸B on Pb and Liquid H₂ and He Targets — •Shawn Bishop — Institute of Physical and Chemical Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan

Elastic angular distributions from scattering of ⁷Be and ⁸B beams on Pb, liquid hydrogen and liquid helium targets have been acquired at 60.8 A MeV and 72.8 A MeV, respectively. These distributions have been analyzed within the framework of Woods-Saxon optical potential models yielding complete optical model parameter sets; additionally, the proton scattering distributions have also been analyzed using microscopic folding models employing various ground state density distributions for ⁷Be and ⁸B. Using a two-body model for ⁸B consisting of a ⁷Be core plus valence proton, our Woods-Saxon ⁷Be + H and ⁷Be + Pb optical potentials have been employed in folding calculations for the problem of ⁸B elastic scattering on H and Pb. We find good agreement between these folding models and our ⁸B elastic data and marked improvement over that obtained using global nucleon-nucleus optical parameter sets from the literature. A dissociation calculation using this two-body model for ⁸B and employing our ⁷Be + Pb potential is shown to reproduce the elastic reaction channel, demonstrating that these potentials can be directly employed for ⁸B dissociation studies. These results will be shown, and a summary of their application for the analysis of a recent ⁸B Coulomb Dissociation experiment will be outlined.