SMuK 2021 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 5: Nuclear Astrophysics

HK 5.6: Vortrag

Montag, 30. August 2021, 18:00–18:15, H4

Measurement of ³⁹K(p,γ)⁴⁰Ca resonance strengths below 900 keV for classical novae nucleosynthesis — •Philipp Scholz, Richard J. deBoer, Joachim Görres, Rebeka Kelmar, Shahina Shahina, and Michael Wiescher — Department of Physics, University of Notre Dame, IN

Classical novae are one of the most frequent explosive nucleosynthesis events in our universe but are still not sufficiently understood.

To this day, nuclear astrophysics cannot explain the endpoint of the nucleosynthesis networks in classical novae which is mainly due to a scarce experimental data base of nuclear reaction rates of proton-induced reactions in the the mass-region above silicon at temperatures between 0.1 GK and 0.4 GK.

Because some nova ejecta hint on the production of elements in the calcium range (Centauri V1065) and some possibly even up to the iron region (Cygni V1974), it is of utmost interest to investigate possible paths towards heavier elements.

Here we report on new measurements of resonance strengths of the ³⁹K(p,γ)⁴⁰Ca reaction below 900 keV at the 5U accelerator of the University of Notre Dame and their implications on the (p,γ) reaction rate on ³⁹K.