Darmstadt 2016 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 51: Structure and Dynamics of Nuclei X

HK 51.6: Talk

Thursday, March 17, 2016, 15:15–15:30, S1/01 A03

First measurement of the decoupling parameter for the K=1 band of ¹⁵⁶Gd ⋆ — •Tobias Beck¹, Jacob Beller¹, Vera Derya², Udo Gayer¹, Johann Isaak^3,4, Bastian Löher^3,4, Norbert Pietralla¹, Philipp Ries¹, Christopher Ries¹, Marcus Scheck^1,5,6, Werner Tornow⁷, Henry R. Weller⁷, Volker Werner¹, and Markus Zweidinger Markus¹ — ¹IKP, TU Darmstadt — ²IKP, Universität zu Köln — ³EMMI, GSI, Darmstadt — ⁴FIAS, Frankfurt — ⁵School of Engineering, UWS Paisley, UK — ⁶SUPA, Glasgow, UK — ⁷Duke University, Durham, USA

In a deformed nucleus the nuclear states are combinations of an intrinsic motion and a rotational motion of the core. In this scenario the Coriolis force changes the projection of the angular momentum on the symmetry axis and admixes different K values. The effects of the Coriolis interactions have been observed experimentally for K=1/2 bands. The recent observation of the first excited rotational state of the isovector low-lying J_K^π=1₁⁺ scissors mode in a (γ,γ′) experiment inaugurates a case to study the Coriolis decoupling for K=1 bands. In the talk, the theoretical description provided by Bohr and Mottelson will be presented and their adaption to the particular case will be explained alongside the ongoing analysis and open questions.
⋆ Supported by the DFG within the scope of SFB 634