Darmstadt 2016 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 11: Nuclear Astrophysics II
HK 11.3: Vortrag
Montag, 14. März 2016, 17:15–17:30, S1/01 A02
Partial cross sections of the 92Mo(p,γ) reaction and the γ-strength in 93Tc — •Jan Mayer, Lars Netterdon, Philipp Scholz, and Andreas Zilges — Institute for Nuclear Physics, University of Cologne
With an isotopic abundance of more than 14 %, 92Mo is the most abundant p nucleus. The γ-process nucleosynthesis is believed to produce 92Mo, but fails to explain its large abundance. Further studies require an accurate description of nuclear physics input parameters for the calculation of reaction cross sections in the scope of the Hauser-Feshbach statistical model.
In order to improve these parameters, total and partial cross-section values of the 92Mo(p,γ)93Tc reaction were measured by means of the in-beam method at seven different proton energies between 3.7 MeV and 5.3 MeV. The γ-rays emitted during the irradiation were detected by the high-purity germanium detector array HORUS at the Institute for Nuclear Physics, University of Cologne. The γγ-coincidence method was applied to correlate γ-ray cascades in 93Tc with their origin in the 92Mo+p compound state.
In this talk, the final results for the measured total and partial cross sections are presented and compared to Hauser-Feshbach calculations using the statistical model code TALYS.
This project was supported by the ULDETIS project within the UoC Excellence Initiative institutional strategy. J.M. and P.S. are supported by the Bonn-Cologne Graduate School of Physics and Astronomy.