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Hannover 2010 – scientific programme

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MS: Fachverband Massenspektrometrie

MS 7: Präzisionsmassenspektrometrie und Anwendungen II

MS 7.4: Talk

Thursday, March 11, 2010, 11:30–11:45, F 428

First direct Penning trap mass measurements on nobelium and lawrencium — •Michael Dworschak1, Michael Block1, Dieter Ackermann1, Klaus Blaum2, Christian Droese3, Sergey Eliseev2, Timo Fleckenstein4, Emma Haettner4, Frank Herfurth1, Fritz-Peter Heßberger1, Sigurd Hofmann1, Jens Ketelaer5, Jochen Ketter5, Heinz-Jürgen Kluge1, Gerrit Marx3, Marco Mazzocco6, Dmitriy Nesterenko7, Yuri Novikov1,7, Wolfgang Plaß1,4, Andrey Popeko8, Saidur Rahaman9, Daniel Rodríguez10, Christoph Scheidenberger1,4, Lutz Schweikhard3, Peter Thirolf11, Gleb Vorobyev1, and Christine Weber91GSI Helmholtzzentrum, Darmstadt — 2MPI für Kernphysik, Heidelberg — 3Universität Greifswald — 4Universität Gießen — 5Universität Mainz — 6INFN Sezione, Padova — 7PNPI RAS, Gatchina — 8JINR, Dubna — 9University of Jyväskylä — 10Universidad de Granada — 11LMU, München

The mass measurements of the three nobelium isotopes 252−254No and the lawrencium isotope 255Lr measured with the Penning trap mass spectrometer SHIPTRAP/GSI have been evaluated. These were the first direct mass measurements of transfermium elements ever performed. The results mark the first step in the exploration of masses of even heavier nuclides which is planned at SHIPTRAP. The main objective is to measure the endpoints of α-decay chains starting from superheavy nuclei in the region of the predicted island of stability. The SHIPTRAP results were compared with previous measurements based on α-decay chains and new literature values were obtained.

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