Köln 2025 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 37: Nuclear Astrophysics V

HK 37.5: Vortrag

Mittwoch, 12. März 2025, 18:45–19:00, SR 0.03 Erw. Physik

Helium burning reactions: Results from Felsenkeller and future plans — •Eliana Masha¹, Simon Vincent^1,2, Aleksandra Skruch¹, Daniel Bemmerer¹, Axel Boeltzig¹, Peter Hempel^1,2, Konrad Schmidt¹, Anup Yadav^1,2, Jordan Marsh³, and Kai Zuber² — ¹Helmholtz-Zentrum Dresden-Rossendorf (HZDR) — ²TU-Dresden — ³School of Physics and Astronomy, University of Edinburgh, United Kingdom

Helium burning is a crucial phase of stellar evolution, responsible for the synthesis of key elements such as carbon, oxygen, and fluorine, which significantly influence the chemical evolution of the Universe. Precise measurements of helium-burning reaction rate at astrophysical energies are essential to constrain stellar models and to understand nucleosynthesis pathways. At the Felsenkeller 5 MV accelerator lab in Dresden, we recently measured the ¹⁵N(α,γ)¹⁹F reaction, which is one of the primary sources of fluorine production, an element whose origin remains a long-standing problem in nuclear astrophysics. Experimental details and results from resonances in the 0.8 - 2 MeV range, along with future plans to investigate other key helium-burning reactions, will be presented.

Keywords: Underground laboratory; Helium burning; Ion Beam Accelerator; Gamma-Ray Spectroscopy; Nucleosynthesis