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HK: Fachverband Physik der Hadronen und Kerne

HK 31: Structure and Dynamics of Nuclei IV

HK 31.8: Vortrag

Mittwoch, 29. März 2017, 18:30–18:45, F 2

Constraining nuclear matrix elements for 0 ν β β decay between 82Se and 82Kr* — •Udo Gayer1, T. Beck1, J. Kleemann1, Fnu Krishichayan3, B. Löher2, O. Papst1, N. Pietralla1, P. C. Ries1, D. Savran2, W. Tornow3, and V. Werner11Institut fuer Kernphysik, TU Darmstadt, Darmstadt, Germany — 2GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Darmstadt, Germany — 3Duke University, Durham NC, USA

The nuclei 82Se and 82Kr are candidates for the hypothetic exotic neutrinoless double-beta (0 ν β β) decay process, and a precise knowledge of their nuclear structure is necessary to estimate decay rates [1] and - should it be detected - to extract neutrino masses from this quantity. In a study of Gd isotopes [2], a connection between the decay behavior of the M1 scissors mode and 0 ν β β decay rates was established. We intend to study decay properties of low-lying magnetic dipole excitations in the 0 ν β β candidates 82Se and 82Kr in nuclear resonance fluorescence experiments with quasi-monochromatic, polarized photons at the High-Intensity Gamma-Ray Source (HIγS) in Durham, NC, USA. In a first experiment, the γ3 setup [3] was used to identify magnetic dipole states of 82Se and to study branching transitions. Preliminary results of this experiment will be presented and discussed.
*Supported by DFG research grant CRC 1245
T. R. Rodriguez, G. Martínez-Pinedo, Phys. Rev. Lett. 105 (2010) 252503
J. Beller et al., Phys. Rev. Lett. 111 (2013) 172501
B. Löher et al., NIMA 723 (2013) 136-142

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