Köln 2004 – scientific programme
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PV: Plenarvorträge
PV XII
PV XII: Plenary Talk
Wednesday, March 10, 2004, 08:30–09:00, P
Facets of the (d,2He) Charge Exchange Reaction at Intermediate Energies: from NN-studies to astrophysics to double-beta decay — •Dieter Frekers — Inst. f. Kernphysik, Universität Münster
In this talk, results from the (d,2He) reaction at intermediate energies are presented. The unbound di-proton system is referred to as 2He, if the two protons couple to a 1S0, T=1 state. The (d,2He) probe appears as a powerful spectroscopic tool for studying charge-exchange reactions in the β+ direction. The key issue here will be the high resolution of order 100 keV, which provides new and sometimes unexpected insight into nuclear structure phenomena. This program has been launched at the AGOR Superconducting Cyclotron Facility at the KVI Groningen. By now it covers a wide field of physics questions ranging from few-body physics (measurement of the neutron-neutron scattering length ann), the structure of halo-nuclei (6He,7He), to questions pertaining to the dynamics of supernova explosions and nuclear synthesis (i.e. GT+ distribution in pf-shell nuclei), and more recently to the measurements of double-beta decay matrix elements and the determination of half-lives of double-beta decaying nuclei (e.g. 48Ca, 116Cd).