München 2019 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 54: Poster

HK 54.27: Poster

Donnerstag, 21. März 2019, 16:30–19:00, Foyer Theresanium

Study of γ -spectroscopy of neutron-rich cerium isotopes after fission — •U. Ahmed1, P. Koseoglou1,2, V. Werner1, N. Pietralla1, J. Wiederhold1, M. Thürauf1, M. Jentschel3, A. Blanc3, G. de France4, U. Köster3, S. Leoni5, P. Mutti3, G. Simpson6, T. Soldner3, C. Ur7,8, W. Urban3,9, S. Ilieva1, R. B. Cakirili10, J. Jolie11, T. Kröll1, J.-M. Régis11, and N. Saed-Samii111IKP - TU Darmstadt, Germany — 2GSI, Germany — 3ILL, France — 4GANIL, France — 5Universita di Milano, Italy — 6LPSC, Université Grenoble Alpes, France — 7Universita di Padova, Italy — 8ELI-NP, Romania — 9University of Warsaw, Poland — 10MPIK Heidelberg, Germany — 11IKP Universität zu Köln, Germany

148Ce and 150Ce isotopes are located in an area of the nuclear chart known for a quantum shape phase transition from spherical to deformed nuclei [1]. The energies of the band-heads of the β - and γ-vibrations are valuable indicators for the shape of a nucleus.
At the Institute Laue-Langevin, neutron-rich cerium isotopes were produced by cold-neutron induced fission of 235U. The prompt γ -rays were measured with the EXILL spectrometer [2], comprised of 8 HPGe clover detectors. The data were analysed using γ -spectroscopy coincidence techniques, e.g. including coincidence conditions with fission partners. These techniques were explored and applied to the search for the 02+-states of 148Ce and 150Ce. Supported by BMBF under Grant No. 05P15RDFN1.
R. F. Casten, Nature Physics 2, 811 (2006).
M. Jentschel et al., JINST 12, P11003 (2017).

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