Speaker
Description
The high-intensity quasi-Maxwellian neutron source based on the Soreq Applied Research Accelerator Facility (SARAF) [1] and the Liquid-Lithium Target (LiLiT) [2,3] were used to investigate neutron capture reactions in the weak and main $s-$process regimes. Experimental determinations of these reactions are important for helping to disentangle the different $s-, r-, p-$processes of nucleosynthesis and the characterization of their stellar sites. Our recently published value for the $^{71}$Ga($n,\gamma$)$^{72}$Ga Maxwellian averaged cross section [4] is smaller and with smaller uncertainty than the experimental recommended value, which may have implications in network calculations such as presented by Pignatari et al. [5]. The $^A$Se and $^A$Ce data are presently under final analysis and will be presented. Our $^A$Kr($n,\gamma$) cross sections [6] are shown to have a strong impact on calculated abundances of krypton isotopes and neighboring nuclides, in some cases improving agreement between theory and observations.
We gratefully acknowledge the collaboration of J. Zappala, T. Heftrich, W. Jiang, Z.-T. Lu, P. Müller, R. Purtschert, R. Reifarth, D. Veltum and M. Weigand in the Kr experiments. This work was supported in part by the Israel Science Foundation (Grant No. 1387/15), the Pazy Foundation (Israel), the German-Israeli Foundation (GIF No. I-1500-303.7/2019). M.P. acknowledges support by the European Union (ChETECINFRA,Project No. 101008324).
[1] I. Mardor et al., Eur. Phys. J. A 54, 91 (2018)
[2] S. Halfon et al., Rev. Sci. Instrum. 85, 056105 (2014)
[3] M. Paul, et al., Eur. Phys. J. A 55, 44 (2019)
[4] M. Tessler et al., Phys. Rev. C 105, 035801 (2022)
[5] M. Pignatari et al., Astrophys. J. 710, 1557 (2010)
[6] M. Tessler et al., Phys. Rev. C 104, 015806 (2021)
| Session | Experimental Nuclear Astrophysics |
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