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Gießen 2007 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 21: Kern- und Teilchen-Astrophysik

HK 21.1: Vortrag

Dienstag, 13. März 2007, 17:00–17:15, E

First measurements of (γ,α) photodisintegration in 92Mo and 144Sm — •Chithra Nair1, Roland Beyer1, Paulo Crespo1, Martin Erhard1, Michael Fauth1,2, Eckart Grosse1,2, Arnd Junghans1, Joakim Klug1, Krasimir Kosev1, Gencho Rusev1, Klaus-Dieter Schilling1, Ronald Schwengner1, and Andreas Wagner11Institut für Strahlenphysik, Forschungszentrum Dresden-Rossendorf, 01328 Dresden, Germany — 2Technische Universität Dresden, 01062 Dresden, Germany

Photodisintegration measurements of the astrophysically important p-nuclei 92Mo and 144Sm were performed at the bremsstrahlung facility at ELBE, FZ Dresden-Rossendorf [1]. In particular the (γ,α) reactions of the mentioned nuclei were studied for the first time using the photoactivation technique at different endpoint energies above and close to the threshold. First experiments of short-lived decays following the reaction 144Sm(γ,n) using the newly built pneumatic delivery system will also be discussed. The activation yields for all measurements are compared with calculations using cross sections from recent Hauser-Feshbach models [2].

[1] R. Schwengner et al., NIM A 555 (2005) 211

[2] M. Erhard et al., PoS (NIC-IX) 056 (2006)

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