Mainz 2022 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 54: Nuclear Astrophysics III

HK 54.4: Vortrag

Mittwoch, 30. März 2022, 17:00–17:15, HK-H10

Analysis of the 3α-decay of the 0₂⁺ state in ¹²C — •David Werner¹, Madalina Ravar^1,3, Peter Reiter¹, Konrad Arnswald¹, Maximilian Droste¹, Pavel Golubev², Rouven Hirsch¹, Hannah Kleis¹, Nikolas Königstein¹, Dirk Rudolph², Alessandro Salice¹, and Luis Sarmiento² — ¹University of Cologne, Institute for Nuclear Physics, Cologne — ²Lund University, Department of Physics, Lund, Sweden — ³TU Darmstadt, Institute of Nuclear Physics, Darmstadt

The branching ratios of the three-particle decay of the Hoyle state, the 0₂⁺ excited state in ¹²C, are an important probe for the inner structure of ¹²C and relevant to the topic of stellar nucleosynthesis. A ¹²C(α,α^′) reaction at 27 MeV beam energy was utilized to populate the state of interest. Two high-statistics experiments were performed at the 10 MV FN-tandem accelerator of the Institute for Nuclear Physics of the University of Cologne. The Lund-York-Cologne-Calorimeter (LYCCA) was used to study the three-particle decay branches of the Hoyle state. The 18 highly-segmented double-sided silicon strip detectors allowed individual detection of the reaction’s four α particles with very high angular precision. Results from particle spectra are compared with Geant4 Monte-Carlo simulations. Preliminary results of the analysis, in particular Dalitz plots, will be presented.