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HK: Fachverband Physik der Hadronen und Kerne

HK 8: Nuclear Astrophysics I

HK 8.3: Vortrag

Montag, 20. März 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.