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HK: Fachverband Physik der Hadronen und Kerne
HK 72: Poster
HK 72.2: Poster
Thursday, March 14, 2024, 17:15–18:45, HBR 14: Foyer
Investigation of the Scissors Mode of 76Ge — •M. Heumüller, V. Werner, S. Bassauer, T. Beck, M. Berger, M. Beuschlein, I. Brandherm, K. E. Ide, J. Isaak, R. Kern, J. Kleemann, O. Papst, N. Pietralla, P. Ries, G. Steinhilber, M. Stoyanova, and R. Zidarova — IKP, TU Darmstadt
76Ge is the baseline isotope for experiments searching for neutrino-less double-beta decay. Nuclear structure input is needed to constrain 0νββ-matrix elements calculated from nuclear theory. We aim for constraining in particular isovector degrees of freedom by the observation of the nuclear scissors mode, following previous experiments employing the method of nuclear resonance fluorescence (NRF) [1,2]. A bremsstrahlung measurement with an endpoint energy of 5.5 MeV was performed for minimizing systematic uncertainties, like the feeding effect, for cross section measurements below 5 MeV, the energy region of the low lying scissors mode. The photons were provided by the superconducting electron accelerator S-DALINAC, impinging on the enriched target in the Darmstadt High Intensity Photon Setup (DHIPS) surrounded by three HPGe detectors for γ-ray detection. A comparison of the experimentally determined collective transition strength of the scissors mode to its systematics [3] will be shown.
This work was supported by the DFG under grant numbers SFB 1245, Project-ID 279384907, and GRK 2891, Project-ID 499256822.
[1]A. Jung et al., Nucl. Phys. A 584, 103-132 (1995)
[2]R. Schwengner et al., Phys. Rev. C 105, 024303 (2022)
[3]N. Pietralla et al., Phys. Rev. C 58, 184 (1998)
Keywords: Nuclear Resonance Fluorescence; Scissors Mode; Nuclear Photonics; Neutrino-Less Double-Beta Decay