Bochum 2009 – scientific programme
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HK: Fachverband Hadronen und Kerne
HK 16: Nuclear Structure and Dynamics II
HK 16.4: Talk
Monday, March 16, 2009, 17:30–17:45, H-ZO 60
Spectroscopy of Transfermium Isotopes at SHIP — •Stanislav Antalic1, Fritz Peter Heßberger2, Sigurd Hofmann2,3, Dieter Ackermann2, Sophia Heinz2, Birgit Kindler2, Ivan Kojouharov2, Bettina Lommel2, Rido Mann2, Štefan Šáro1, Branislav Streicher2, Barbara Sulignano4, and Martin Venhart1 — 1Comenius University, Bratislava, Slovakia — 2GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany — 3Goethe-Universität, Frankfurt am Main, Germany — 4CEA-Saclay, DAPNIA/SPhN, Gif-sur-Yvette Cedex, France
Recent developments of experimental techniques suited for α-, γ- and CE spectroscopy now allow to study nuclear structure in the region of trans-fermium nuclei. This opened the door to investigate nuclear structure under extreme conditions of heaviest nuclei (Z>100, A>250).
Most interesting examples are studies of K-isomers. Experiments aimed to investigate such phenomena provide important information on the nuclear structure of the heaviest elements and are stringent tests for the quality of nuclear models.
In this contribution the results from studies of multi-quasi-particle isomeric states in 253No and 255Lr performed at SHIP will be presented in detail. Both nuclei are first odd-mass isotopes in the trans-fermium region for which high K-isomers were observed. By decay of the high K-isomer in 253No a rotational band was populated, which was not seen in previous in-beam studies. Additionally, also the recent results on the single particle level systematics for the N = 149, 151 and 153 isotones will be presented.