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HK: Fachverband Physik der Hadronen und Kerne

HK 62: Nuclear Astrophysics V

HK 62.3: Talk

Thursday, March 14, 2024, 16:30–16:45, HBR 14: HS 4

γ-ray angular distribution of the ³He(α,γ)⁷Be reaction — •Peter Hempel^1,2, Daniel Bemmerer¹, Axel Boeltzig¹, Till Lossin^1,2, Eliana Masha¹, Konrad Schmidt¹, Steffen Turkat², Anup Yadav^1,2, and Kai Zuber² — ¹Helmholtz-Zentrum Dresden-Rossendorf (HZDR) — ²TU Dresden

The ³He(α,γ)⁷Be reaction plays two roles in astrophysics: It is responsible for ⁷Li production during Big Bang nucleosynthesis, and it controls the branching between the pp-1 and pp-2 chains in solar hydrogen burning. Here, we report on the final data from a measurement of the γ-ray angular distribution of this reaction in the energy range E_CM = 450 - 1220 keV. The experiment has been carried out at the Felsenkeller 5MV shallow-underground accelerator lab in Dresden. For the angular study more than 20 HPGe detectors were arranged at angles between θ = 25 - 140 ^∘ with respect to the beam direction. – The use of GAMMAPOOL resources is gratefully acknowledged.