Bochum 2018 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 4: Nuclear Astrophysics I

HK 4.4: Vortrag

Montag, 26. Februar 2018, 15:00–15:15, HZO 100

Big Bang Cosmology in the Lab: The ²H(p,γ)³He reaction studied at LUNA — Daniel Bemmerer¹, •Klaus Stöckel^1,2, and Tamás Szücs^1,3 for the LUNA collaboration — ¹Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Dresden, Germany — ²TU Dresden, Germany — ³MTA ATOMKI, Debrecen, Hungary

Recent high-precision measurements of the primordial ²H abundance have opened the path to use Big Bang nucleosynthesis to constrain the primordial baryon to photon ratio with similar precision as the cosmic microwave background. This would provide an independent cross-check on current Big Bang models. However, the interpretation of the abundance is limited by the lack of precise nuclear data, in particular on the main ²H destruction channel, the ²H(p,γ)³He reaction. A new experiment to study the ²H(p,γ)³He cross section directly in the Big Bang energy window is underway at the LUNA 400 kV accelerator, deep underground in the Gran Sasso laboratory, Italy. The progress of experiment and analysis will be summarized. – Supported by DFG (BE 4100/4-1).