Bochum 2018 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 18: Structure and Dynamics of Nuclei III
HK 18.5: Vortrag
Dienstag, 27. Februar 2018, 15:15–15:30, HZO 70
Probing the E2 properties of the scissors mode with real photons⋆ — •Tobias Beck1, Norbert Pietralla1, Udo Gayer1, Volker Werner1, Bastian Löher1, Deniz Savran2, Andreas Zilges3, Vera Derya3, and Werner Tornow4 — 1IKP, TU Darmstadt — 2GSI, Darmstadt — 3IKP, Universität zu Köln — 4Duke University, Durham, NC, USA
The study of the properties of the nuclear scissors mode provides an essential insight into the nature of the restoring forces between the proton and neutron subsystems. Recently, first information on the E2 decay transition strength of the scissors mode was extracted [1] from a high-statistics photon-scattering experiment on 156Gd using quasi-monochromatic photon beams provided by the High Intensity γ-ray Source (HIγS). The data allowed for measuring a finite value of the E2/M1 multipole mixing ratio and, thus, the first measurement of an F-vector E2 transition in axially deformed nuclei. A similar continuative experiment has been performed on the well-deformed nuclei 162,164Dy at HIγS. The obtained results indicate that highest-precision photon-scattering experiments with linearly polarized photons are highly sensitive to the electric quadrupole-decay properties of the scissors mode. The obtained results will be presented in detail and discussed in terms of the underlying nuclear physics. An outlook for future research will be given.
T. Beck et al., Phys. Rev. Lett. 118, 212502 (2017).
⋆This work was supported by the DFG under Grant Nos. SFB 634 and SFB 1245.