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 Fauth^1,2, Eckart Grosse^1,2, Arnd Junghans¹, Joakim Klug¹, Krasimir Kosev¹, Gencho Rusev¹, Klaus-Dieter Schilling¹, Ronald Schwengner¹, and Andreas Wagner¹ — ¹Institut 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)