Bonn 2010 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 19: Nukleare Astrophysik I

HK 19.3: Vortrag

Dienstag, 16. März 2010, 15:00–15:15, HG VI

96Ru(p,γ)97Rh measurement at the GSI storage ring — •Rene Reifarth — GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany — J.W. Goethe Universität, Frankfurt a.M, 60438, Germany

The nucleosynthesis of elements beyond iron is dominated by neutron captures in the s and r processes. However, 32 so-called p-nuclei are thought to be produced in the p process, where proton-rich nuclei are made by sequences of photodisintegrations and (p,γ) reactions and following β+ decays on existing r- and s-seed nuclei.

Cross section measurements on (p,γ) and (α,γ) reactions in the astrophysically interesting energy range are already very challenging on stable nuclei. Only a minute part of the nuclei involved in p-process networks, however, is stable. The most promising approach to determine the desired reaction rates is to produce the isotopes in Radioactive Ion Beam facilities and to investigate the reactions in inverse kinematics.

A pioneering experiment was recently performed at the Experimental Storage Ring (ESR) at GSI. Fully stripped ions of 96Ru were injected into the storage ring and slowed down to a few MeV/nucleon. The reaction products were detected with different particle detectors.

This project is supported by the HGF Young Investigators Project VH-NG-327.

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