Program - Brookhaven National Laboratory

– a density of levels too low for widely used traditional statistical model treatments of neutron capture
cross sections on 130,132 Sn employing Fermi gas level density formulations. This work was supported by:
US Dept. of Energy, Office of Nuclear Physics; the Joint Institute for Heavy Ion Research at ORNL;
Topical Collaboration on Theory of Reactions for Unstable Isotopes (TORUS); National Natural Science
Foundation of China; Beihang New Star; International Science and Technology Cooperation Projects of
China; and Fundamental Research Funds for Central Universities of China.
Corresponding author: Michael Smith
[1] R. Surman et al., Phys. Rev. C79, 045809 (2009) [2] K. L. Jones et al., Nature 465, 454 (2010); Phys.
Rev. C84, 034601 (2011) [3] R. L. Kozub et al., Phys. Rev. Lett. (2012) in press
PR 7
KADoNiS: The Astrophysical p-process Database
Tamas Szücs and Zsolt Fülöp, Institute of Nuclear Research (ATOMKI), Debrecen, Hungary. Iris
Dillmann, Justus-Liebig-Universität Giessen and GSI Helmholtzzentrum für Schwerionenforschung,
Germany. Ralf Plag, GSI Helmholtzzentrum für Schwerionenforschung and Goethe-Universität Frankfurt,
Germany.
The KADoNiS (Karlsruhe Astrophysical Database of Nucleosynthesis in Stars) project is an online database
(www.kadonis.org) for cross sections relevant to the s-process and the p-process. The nuclei heavier than
iron are mainly produced by two neutron capture process, the so- called s- and r-processes. However, less
than 1% of the heavy elements on the proton rich side of the valley of stability cannot be reached by neutron
captures. These are the so called “p-nuclei,” which are mainly produced by the “γ-process.” This proceeds
through gamma induced reactions on s- and r- seed nuclei in O/Ne burning shells of exploding massive stars.
Modern astrophysical network calculations involving thousands of isotopes and ten thousands of reactions
cannot fully reproduce the observed solar abundance of all p-nuclei, which led to the conclusion that
the p-nuclei are produced by a superposition of different processes. Only a fraction of these reactions are
known experimentally, whereas the rest has to be inferred from statistical model calculations. Experimental
proton- and alpha- induced reaction cross sections in the valley of stability can be used to finetune the
statistical model calculations and make them more reliable for the extrapolation into the unknown regions.
Up to now no compilation for the heavy charged particle reactions exists. For the p-process database
of the KADoNiS project all available experimental data from (p,γ), (p,n), (p,α), (α,γ), (α,n) and (α,p)
reactions in or close to the respective Gamow window were extracted from the EXFOR database. Our aim
is to provide a user-friendly database based on the KADoNiS framework, where experimental data can
be compared with state-of-the-art Hauser-Feshbach calculations. The p-process database of KADoNiS is
especially useful for experimentalists to easily find and compare the existing data. It can be also useful for
theoreticians to check the reliability of their calculations. We will give an overview about the p-process
part of the KADoNiS project and present the status and improvements. T.Sz. and is Zs.F. are supported
by EUROGENESIS OTKA-NN83261 and OTKA 101328. I.D. is supported by the Helmholtz association
via the Young Investigators project VH-NG-627. R.P. is supported by the Helmholtz association via the
Young Investigators project VH-NG-327.
Corresponding author: Tamas Szücz
PR 8
Systematic Study of Maxwellian-Averaged Cross Sections from Precise AMS Measurements
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