Berlin 2005 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 20: Kern- und Teilchen-Astrophysik
HK 20.7: Vortrag
Montag, 7. März 2005, 15:30–15:45, TU MA144
The (n,γ) cross sections of light p nuclei at kT= 25 keV: Towards an updated experimental database for the p process — •Iris Dillmann1,2, Michael Heil1, Franz Käppeler1, Thomas Rauscher2, and Friedrich-Karl Thielemann2 — 1Forschungszentrum Karlsruhe, Postfach 3640, D-76021 Karlsruhe — 2Universität Basel, Klingelbergstrasse 82, CH-4056 Basel
Experimental reaction rates of p nuclei are still very scarce. Therefore these (n,γ), (p,γ), (α,γ) and the respective inverse rates have to be inferred by statistical Hauser-Feshbach calculations. Concerning stellar (n,γ) rates of the 19 p-only nuclei between 74Se and 132Ba, experimental data are available for 13 of these nuclei. We report on first results of the missing cross sections of 74Se, 84Sr, 102Pd, 120Te and 132Ba at kT= 25 keV, which were measured with the activation method using the 7Li(p,n)7Be reaction. The aim of this work is the update of the Bao et al. compilation for p nuclei and the creation of a website containing all experimental data on (n,γ), (p,γ), (α,γ) and inverse cross sections for p-process studies.