München 2019 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 38: Nuclear Astrophysics III

HK 38.6: Vortrag

Mittwoch, 20. März 2019, 15:30–15:45, HS 18

Investigation of (α,γ) reaction cross sections of ruthenium isotopes — •M. Koerschgen, F. Heim, E. Hoemann, J. Mayer, M. Mueller, P. Scholz, and A. Zilges — Institute for Nuclear Physics, University of Cologne

Photodesintegration networks are one of the main processes in the nucleosynthesis of p-nuclei. Especially (γ,α) reactions play a crucial role in the production of the heaviest p-nuclei [1]. Practically they are obtained by the measurement of inverse (α,γ) reaction cross sections at sub coulomb energies and statistical model calculations. The latter requires fundamental knowledge of optical model potentials (OMPs), nuclear level densities (NLDs) and the γ-ray strength functions (γ-ray SFs).
This talk will cover a project aiming to measure (α,γ) reaction cross sections on ruthenium isotopes applying the 4π summing method [2]. The measurements take place at the Dynamitron Tandem Laboratorium of the Ruhr-Universität Bochum, Germany, using a 12 by 12 inch NaI(Tl) crystal.
This work is supported by the DFG (ZI-510/8-1).
[1] M. Arnould and S. Goriely, Phys. Rep. 384 (2003) 1.
[2] A. Spyrou, H.W. Becker, A. Lagoyannis, S. Harrisopulos, and C. Rolfs, Phys. Rev. C 76 (2007) 1.