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HK: Fachverband Physik der Hadronen und Kerne
HK 18: Structure and Dynamics of Nuclei III
HK 18.4: Talk
Tuesday, February 27, 2018, 15:00–15:15, HZO 70
Decay Characteristics of the Scissors Mode in the 0νββ-Decay Mother 150Nd* — •Jörn Kleemann1, T. Beck1, U. Gayer1, N. Pietralla1, V. Werner1, S. Finch2, FNU Krishichayan2, B. Löher1, O. Papst1, P. C. Ries1, M. Schilling1, W. Tornow2, M. Weinert3, and M. Zweidinger1 — 1IKP, TU Darmstadt — 2Duke University, Durham NC, USA — 3IKP, Universität zu Köln
150Nd is a candidate for a potential neutrinoless double beta (0νββ) decay to 150Sm. If such a decay were to be measured the neutrino mass could be extracted from the decay rate. To do so, however, precise knowledge of the nuclear structure of both nuclei is necessary. Therefore, nuclear resonance fluorescence experiments were conducted on both isobars using the γ3 setup [1] at the High Intensity γ-ray Source (HIγS) of the Triangle Universities Nuclear Laboratory in Durham, NC, USA. The experiments focused on the decay characteristics of the scissors mode, namely the ratio of its transition strengths to the 02+ and ground state, as it induces constraints on nuclear matrix elements involved in the extraction of the neutrino mass [2]. By using HIγS’ intense, nearly monochromatic, linearly polarized γ-ray beam, dipole states were selectively excited. Their parities were determined through the angular distribution of their ground-state transition and a decay to the 02+ state was observed. Preliminary results of the experiment on 150Nd will be presented and compared to analogous results on 150Sm.
*Supported by the DFG through the research grant SFB 1245.
[1] B. Löher et al. Nucl. Instr. Meth. Phys. Res. A 723, 136 (2013)
[2] J. Beller et al. Phys. Rev. Lett. 111, 172501 (2013)