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HK: Fachverband Physik der Hadronen und Kerne
HK 8: Nuclear Astrophysics I
HK 8.5: Vortrag
Montag, 20. März 2023, 17:45–18:00, SCH/A419
Analysis of the 3α-decay of the 02+ state in 12C — •David Werner1, Joe Roob1, Peter Reiter1, Konrad Arnswald1, Maximilian Droste1, Pavel Golubev2, Rouven Hirsch1, Hannah Kleis1, Nikolas Königstein1, Madalina Ravar1, 3, 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 between the direct and sequential three-particle decay of the 02+ excited state in 12C, the Hoyle state, are important probes for the inner structure of 12C and provide insights into stellar nucleosynthesis. Two high-statistics experiments were performed at the 10 MV FN-tandem accelerator of the Institute for Nuclear Physics of the University of Cologne. A 12C(α,α′) reaction at a beam energy of 27 MeV was utilized to populate the state of interest. The Lund-York-Cologne-Calorimeter (LYCCA) was used to study the three-particle decay branches of the Hoyle state. The 18 segmented double-sided silicon strip detectors allowed individual detection of the reaction’s four α particles with high angular precision. Results from particle spectra are compared with Geant4 Monte-Carlo simulations. Latest analysis results, in particular Dalitz plots and the search for the direct 3α decay, will be presented.