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HK: Fachverband Physik der Hadronen und Kerne
HK 37: Nuclear Astrophysics III
HK 37.3: Vortrag
Mittwoch, 13. März 2024, 16:30–16:45, HBR 14: HS 1
Advanced data analysis techniques for the 12C(α,α′) reaction — •Alessandro Salice1, David Werner1, Peter Reiter1, Konrad Arnswald1, Maximilian Droste1, Pavel Golubev2, Rouven Hirsch1, Hannah Kleis1, Nikolas Königstein1, Dirk Rudolph2, Timo Biesenbach1, Joe Roob1, Madalina Ravar1,3, 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
In order to resolve and understand the inner structure of 12C and its production during stellar nucleosynthesis, the decay properties of 12C’s excited 02+ state, the so called Hoyle state, are studied. Excited states in 12C are populated via 12C(α,α′) reactions at 27 MeV beam energy at the FN-tandem accelerator at the University of Cologne. A set of 18 highly-segmented Double Sided Silicon Strip Detectors (DSSSD) of the Lund-York-Cologne-Calorimeter enabled a huge solid angle coverage with high angular resolution. Data analysis of a high statistics experiment required best center-of-mass energy resolution and high angular resolution for momentum reconstruction. For this purpose in-beam calibrations of the DSSSDs were performed on a pixel level. Beam-spot tracking, dead layer corrections and a precise detector position determination of individual DSSSDs were mandatory for best detector performance. Examples for improvements concerning Q value, position of the reaction plane, angular correlations and the final Dalitz plot of three α decay will be presented.
Keywords: Hoyle State