Dresden 2013 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 57: Poster - Nukleare Astrophysik
HK 57.1: Poster
Mittwoch, 6. März 2013, 16:45–19:00, HSZ 4.OG
Geant4 simulation for proton induced reactions at ESR — •Bo Mei1,2, Ganna Rastrepina1,2, Rene Reifarth1,2, Michael Heil2, and Ralf Plag1,2 — 1University of Frankfurt, Frankfurt am Main, Germany — 2GSI, Darmstadt, Germany
It is essential to measure the cross sections of the (p, γ) reactions in Gamow window of the p-process in order to understand the nucleosynthesis of 35 stable proton-rich nuclides between 74Se and 196Hg [1]. The investigation of proton capture rates of radioactive nuclides in traditional kinematics is limited to nuclides of long half-lives. Therefore, a proof-of-principle experiment in inverse kinematics has been successfully performed at the Experimental Storage Ring (ESR) of GSI Helmholtzzentrum für Schwerionenforschung GmbH. The circulating ions were interacting with a hydrogen gas jet target at ESR. A preliminary result of the 96Ru(p,γ)97Rh cross section at 10 AMeV is already published [2]. In order to improve the accuracy of the background determination, extensive Geant4 simulations of the experimental setup have been performed to determine the transmission of all proton-induced reaction products. The results agree well with the experimental data. The simulation tool has also been applied for a proposed, improved experiment aiming at cross section measurements down to ECM≈5 AMeV. The project was supported by Helmholtz International Center for FAIR and Helmholtz Young Investigator Group VH-NG-327.
[1] M. Arnould and S. Goriely, Phys. Rep. 384 (2003) 1.
[2] Q. Zhong et al., Journal of Physics 202 (2010) 012011.