SMuK 2021 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 5: Nuclear Astrophysics
HK 5.4: Vortrag
Montag, 30. August 2021, 17:30–17:45, H4
Weak r-process nucleosynthesis: the impact of (α,xn) reactions — •Athanasios Psaltis1, Almudena Arcones1,2, Melina Avila3, Max Jacobi1, Zach Meisel4, Peter Mohr5, Fernando Montes6, and Wei Jia Ong7 — 1TU Darmstadt, Germany — 2GSI, Darmstadt, Germany — 3Argonne National Laboratory, Argonne, IL, USA — 4Ohio University, Athens, OH, USA — 5ATOMKI, Debrecen, Hungary — 6NSCL/MSU, East Lansing, MI,USA — 7Lawrence Livermore National Laboratory, Livermore, CA, USA
`Light' heavy elements (Z = 38 -- 47) can be synthesized in the neutrino--driven ejecta of core--collapse supernovae via the weak r--process [1]. This nucleosynthesis scenario exhibits uncertainties from the absence of experimental data from (α,xn) reactions on neutron--rich nuclei, which are currently based on statistical model calculations. A recent sensitivity study identified the most important (α,xn) reactions that can affect the production of `light' heavy elements under different astrophysical conditions [2]. The current status of weak r--process nucleosynthesis calculations and the planning of experiments to experimentally determine (α,xn) reaction rates using the MUSIC detector at Argonne National Laboratory [3] and the SECAR recoil separator at FRIB [4] will be discussed.
References
[1] A. Arcones and F. Montes, Astrophys. J. 731, 5 (2011)
[2] J. Bliss et al., Phys. Rev. C 101, 055807 (2020)
[3] M. L. Avila et al., NIM A 859, 63 (2017)
[4] G. Berg et al., NIM A 877, 87 (2018)