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Bochum 2018 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 4: Nuclear Astrophysics I

HK 4.5: Talk

Monday, February 26, 2018, 15:15–15:30, HZO 100

Study of the Big Bang nuclear reactions 2H(p)3He and 3He(α,γ)7Be at high energy — •Steffen Turkat1, Shavkat Akhmadaliev2, Daniel Bemmerer2, Felix Ludwig1,2, Klaus Stöckel1,2, Tamás Szücs1,2, Louis Wagner1,2, and Kai Zuber11Institut für Kern- und Teilchenphysik, TU Dresden, Germany — 2Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Dresden, Germany

The improved precision of Big Bang nuclidic abundance determinations calls for more precise nuclear data to improve the models. Currently, the Big Bang abundance predictions for 2H and 7Li are limited in precision by the 2H(p,γ)3He and 3He(α,γ)7Be reactions, respectively. In order to address this problem, a re-study of these cross sections is underway. Complementing low-energy data from LUNA, these cross sections are being measured in the 0.3-2 MeV center of mass energy range at the HZDR 3 MV Tandetron. The activated 7Be samples from the latter reaction shall be counted at the new Felsenkeller underground facility. The status of the two experiments will be summarized. — Supported by DFG (ZU 123/21-1 and BE 4100/4-1).

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