Darmstadt 2016 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 27: Structure and Dynamics of Nuclei VI
HK 27.3: Vortrag
Dienstag, 15. März 2016, 17:30–17:45, S1/01 A03
Twenty-five New Mass Values from Measurements Performed with Isochronous Mass Spectrometry — •Marcel Diwisch1, Ronja Knöbel1,2, Zygmunt Patyk3, Hans Geissel1,2, Wolfgang R. Plaß1,2, Christoph Scheidenberger1,2, and Helmut Weick2 for the FRS-ESR collaboration — 1Justus-Liebig-Universität Gießen, Germany — 2GSI, Darmstadt, Germany — 3National Centre for Nuclear Research - NCBJ Swierk, Warszawa, Poland
Masses of uranium fission fragments have been measured with the FRS-ESR facility at GSI. In order to increase the mass resolving power and particle identification for non-isochronous particles, Bρ-tagging was applied in one out of two experiments. A new method of data analysis, using a correlation matrix for the combined data set from the two experiments, has provided reliable experimental mass values for 25 different neutron-rich isotopes for the first time. The new masses were obtained for nuclides in the element range from Ge to Ce. The results have been compared with theoretical predictions. At the neutron shell N=82 the comparison of experimental data for tin and cadmium isotopes show both strong shell effects in agreement with spectroscopy experiments and modern shell-model calculations.