Bochum 2009 – scientific programme

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HK: Fachverband Hadronen und Kerne

HK 26: Nuclear Structure and Dynamics I

HK 26.1: Invited Group Report

Tuesday, March 17, 2009, 14:00–14:30, H-ZO 40

Mass measurements at JYFLTRAP — •Ari Jokinen — Department of Physics, P.O. Box 35 (YFL), FIN-40014 University of Jyväskylä, Finland

The mass of the ground state of a nucleus can provide insight into the underlying nuclear structure, such as charge symmetry, shell effects, shape coexistence and so forth. Atomic masses are also needed to test and improve mass predictions and astrophysical network calculations. Finally, precise Q-value measurements provide stringent tests of the Standard Model and contribute to double beta decay and neutrino physics.

The JYFLTRAP facility in the Department of Physics, University of Jyväskylä, is a unique combination of the ion traps and ion guide technique. The latter allows access to regions of the nuclide chart unexplored by conventional ISOL techniques. The tandem Penning trap system comprises two traps within one superconducting solenoid allowing independent purification in the first trap and precision measurement in the second trap. In addition, due to the installation of two traps inside a single superconducting solenoid, new trapping techniques have been developed.

Some of the recent highlights from the JYFLTRAP facility will be reviewed. Those include an evolution of the N=50 shell gap, precision Q-value measurements for weak interaction physics and mass measurements for nuclear astrophysics.