Microscopic Optical Potentials for the Reaction Helium-6(p,p)Helium-6

by Prof. Charlotte Elster (Ohio University)

Friday 16 Dec 2011, 15:30 → 16:30 Asia/Tokyo

201 (room 201, 2F of RIBF building)

The calculation and derivation of microscopic optical potentials for calculating scatter-ing observables for elastic scattering from spin-zero nuclei has a long tradition. So-called microscopic ‘full-folding’ models based on a nuclear density matrix and a fully-off-shell two-nucleon t-matrix have been developed mainly for closed shell nuclei heavier than Oxygen-16. Constructing a microscopic optical potential for Helium-6 poses a two-fold challenge: First, Helium-6 is a loosely bound nucleus consisting of an alpha-core and two valence neutrons. Second, Helium-6 is not a closed-shell nucleus. To address the first challenge, an optical potential based on the Watson first order multi-ple scattering ansatz is extended to accommodate the internal dynamics of a cluster model for the Helium-6 nucleus. Differential cross sections and analyzing powers are calculated for a set of energies, including 71 MeV/nucleon and are discussed. Further extension to address the open-shell structure of Helium-6 will also be discussed.