Physics
Scientific paper
Apr 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008pun..conf..114e&link_type=abstract
PHYSICS OF UNSTABLE NUCLEI. Proceedings of the International Symposium on the ISPUN07. Held 3-7 July 2007 in Hoi An, Vietnam. Ed
Physics
Scientific paper
Light-ion induced direct reactions, like for example elastic and inelastic scattering, transfer-, charge exchange-, or knock out-reactions, have been proved in the past, for the case of stable nuclei, to be powerful tools for obtaining nuclear structure information, and were also applied within the last decade for the investigation of light exotic nuclei with radioactive beams in inverse kinematics. In particular, it turned out that in many cases essential nuclear structure information is deduced from high-resolution measurements at low momentum transfer.
As an example an overview on most recent results on intermediate energy elastic proton scattering, a meanwhile well established method for the investigation of nuclear matter distributions of halo nuclei, is given. Differential cross section data for small angle proton scattering from 12,14Be and 8B at energies near 700 MeV/u were obtained and analyzed using the Glauber multiple scattering theory. Preliminary results on the nuclear matter radii and nuclear matter distributions are presented. In particular for 8B, supposed to be a candidate for a proton halo, preliminary results confirm the existence of a pronounced proton halo structure. For the case of neutron-rich Li nuclei recent results from laser spectroscopy combined with results from proton scattering allowed to deduce the neutron radii and the neutron skin sizes of the 8,9,11Li isotopes.
The experimental conditions at the future international facility FAIR will provide unique opportunities for nuclear structure studies on nuclei far off stability, and will allow to explore new regions in the chart of nuclides of high interest for nuclear structure and nuclear astrophysics. In particular, the predicted luminosities will allow for the investigation of direct reactions with stored and cooled radioactive beams at internal H, He, etc. targets of the new storage ring NESR. This technique enables high resolution measurements down to very low momentum transfer and provides a gain in luminosity from accumulation and recirculation of the radioactive beams. A brief overview on the research objectives and the technical realization of the EXL setup (EXotic nuclei studied in Light-ion induced reactions at the NESR storage ring), supposed to be a highly efficient, high resolution universal detection system, applicable to a wide class of reactions, is presented.
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