Köln 2004 – wissenschaftliches Programm

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PV: Plenarvorträge

PV XXIX

PV XXIX: Plenarvortrag

Freitag, 12. März 2004, 12:30–13:00, P

Probing the halo structure of exotic nuclei by elastic proton scattering in inverse kinematics — •Peter Egelhof — Gesellschaft für Schwerionenforschung mbH, Planckstrasse 1, D-64291 Darmstadt, Germany

Proton-nucleus elastic scattering at intermediate energies, a well-established method for probing nuclear-matter density distributions of stable nuclei, was applied for the first time to exotic nuclei. This method is demonstrated to be an effective means for obtaining detailed information on the size and radial shape of halo nuclei. Differential cross-sections for small-angle scattering were measured at energies near 700 MeV/u for the neutron-rich helium isotopes ^6,8He, and more recently for the lithium isotopes ^6,8,9,11Li. The experimental concept and the procedure of the data analysis in terms of the Glauber multiple scattering theory are discussed, and the results on the nuclear matter radii, the matter distributions, and the significance of the data for a halo structure are presented. The data allow also for a sensitive test of theoretical model calculations on the structure of halo nuclei.

In a very recent experiment data on p^6,8He elastic and quasielastic scattering towards higher momentum transfer were taken using a liquid hydrogen target. Such data are expected to give more detailed insight into the inner structure of these halo nuclei. First results are presented.