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HK: Fachverband Physik der Hadronen und Kerne
HK 8: Nuclear Astrophysics I
HK 8.3: Talk
Monday, March 20, 2023, 17:15–17:30, SCH/A419
Cross section measurements of the 12C(p,γ)13N reaction in the energy range of 130 keV to 640 keV — •Simon Rümmler — Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiation Physics — TU Dresden, Institute of Nuclear and Particle Physics
The CNO-cycle is the dominant hydrogen burning process in stars above a temperature of 17 million Kelvin. The rate of this cycle in the initial phase and in the outer shells of the burning zone is dominated by the rate of the 12C(p,γ)13N reaction. Furthermore, this reaction affects the ratio of 12C to 13C abundances. Efforts are underway to re-measure the cross section of the 12C(p,γ)13N in the energy region of the 400 keV resonance, leading to an improved extrapolation to astrophysically relevant energies.
In 2017 the reaction was studied in inverse kinematics at the 3 MV Tandetron accelerator at Helmholtz-Zentrum Dresden-Rossendorf in an energy range of 130 keV to 450 keV. Further measurements in the energy range of 330 keV to 640 keV with low background were done at the 5 MV Pelletron accelerator at the Felsenkeller shallow-underground laboratory in Dresden in 2022. The methods and results of these measurements, as well as a conclusion of the two campaigns, will be presented.