6–11 Jun 2010
Village de Vacances de Lamoura
Europe/Zurich timezone

Recent mass measurements at ISOLTRAP

Not scheduled
Village de Vacances de Lamoura

Village de Vacances de Lamoura

39310 Lamoura France
Board: 39
poster with financial aid Shell structure far from stability

Speaker

Dr Susanne Kreim (Max-Planck-Institut fuer Kernphysik (MPI)-Unknown-Unknown)

Description

Precision mass measurements are performed at the mass spectrometer ISOLTRAP which is located at the isotope separator ISOLDE/CERN. The time-of-flight method is employed to determine the frequency of an ion stored in a Penning trap from which the mass can be extracted. Of special interest are exotic nuclei whose mass can be determined with a relative uncertainty of down to 10-8. These values help to examine nuclear structure effects, revising mass models or are incorporated into nucleo-synthesis calculations. In the past year, ISOLTRAP delivered precious data to some of these applications: Determining the two neutron separation energy of 64-66Mn allowing for ruling out a possible shell closure at N=40. The nucleus 66Mn with a half-life of only 64ms is thereby the shortest-lived nuclei ever to be measured at ISOLTRAP. In addition, the masses of 96,97Kr disproved the assumption of some mass models – such as e.g. HFB17 – that a region of deformed nuclei existed around N=60. Nuclei lying far from stability can furthermore be used to test mass models, thus shedding light on the r-process; one of them being the masses of 122-124Ag. Finally, the determination of the mass of 194Hg allows for improving the reachable limit for the electron neutrino mass to about 20eV.
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Primary author

Dr Susanne Kreim (Max-Planck-Institut fuer Kernphysik (MPI)-Unknown-Unknown)

Presentation materials

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