Münster 2002 – scientific programme
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HK: Physik der Hadronen und Kerne
HK 9: Poster Session: Theory
HK 9.27: Poster
Tuesday, March 12, 2002, 10:30–12:45, Foyer Chemie
Two and Three Neutron Halos in Helium and Lithium Isotope — •M. Tomaseli1,2, T. Kuehl2, P. Egelhof2, W. Noertershaeuser2, A. Dax2, H. Wang2, D. Marx2, S.R. Neumaier2, H.-J. Kluge2, I. Tanihata3, S. Fritzsche4, and M. Muttere1 — 1Institute of Nuclear Physics, Darmstadt University, D-64289 Darmstadt, Germany — 2Gesellschaft fuer Schwerionenforschung (GSI), D-64291 Darmstadt, Germany — 3RIKEN 2-1 Hirosawa, Wako-Shi, Saitama 351-0198, Japan — 4Institute of Physics, Kassel University, D-34132 Kassel, Germany
The far reaching shape of the matter distributions (halo) of exotic nuclei with high isospin components is calculated in the Dynamic Correlation Model (DCM) which is based on the interaction of valence- and core-particles. In this model, one, two, or more valence particles and intrinsic vacuum-clusters (collective-excitations of reference vacuum) are treated within the same formalism. Matter and charge distributions of lithium and beryllium isotopes are strongly modulated by the couplig of the valence particles with the core and the matter radii extracted from the theoretical distributions are in good agreement with experimental results. Within the model the core-protons are de facto contributing to the halo formation. The effect of the core excitation mechanism on the calculated cross sections for proton scattering on helium and lithium isotopes is analysed. For the charge radii new experiments based on the determination of the volume-shift are discussed