Frankfurt 2014 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 24: Struktur und Dynamik von Kernen
HK 24.7: Vortrag
Dienstag, 18. März 2014, 18:15–18:30, HZ 4
Octupole Correlations in Excited 0+ States of the Actinides — •Mark Spieker1, Dorel Bucurescu2, Janis Endres1, Thomas Faestermann3, Ralf Hertenberger4, Sorin Pascu2, Hans-Friedrich Wirth4, Nicolae-Victor Zamfir2, and Andreas Zilges1 — 1Institute for Nuclear Physics, University of Cologne, Germany — 2Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest, Romania — 3Physik Department, Technische Universität München, Munich, Germany — 4Fakultät für Physik, Ludwig-Maximilians-Universität München, Munich, Germany
New experimental data has once again shown the importance of the octupole degree of freedom in the actindes. To further study possible admixtures of double-octupole structures to the wave function of positive-parity states, a high-resolution (p,t) experiment on 242Pu has been recently performed at the Q3D magnetic spectrograph in Munich. Excited 0+ states were populated in 240Pu up to an excitation energy of 3 MeV. The new data allowed for a stringent test of the predictions of the spdf interacting boson model. In order to find possible double-octupole 0+ candidates in the actinides, the signature of close-lying first and second excited 0+ states has been proposed. It is found that the observation of this signature coincides with an E1 γ-decay of the first excited 0+ state, while this state is strongly populated in the (p,t) reaction [1].
Supported by the DFG (ZI-510/4-2).
1 M. Spieker et al., Phys. Rev. C 88 (2013) 041303(R)