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Bonn 2020 – scientific programme

The DPG Spring Meeting in Bonn had to be cancelled! Read more ...

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HK: Fachverband Physik der Hadronen und Kerne

HK 37: Structure and Dynamics of Nuclei VII

HK 37.2: Talk

Wednesday, April 1, 2020, 17:00–17:15, J-HS E

Nuclear Isovector Valence-shell Excitation of 202,204Hg — •Ralph Kern1, Robert Stegmann1, Norbert Pietralla1, Georgi Rainovski2, Mike P. Carpenter3, Robert V. F. Janssens4,5, Marc Lettmann1, Oliver Möller1, Thomas Möller1, Christian Stahl1, Volker Werner1, and Shaofei Zhu31Institut für Kernphysik, TU Darmstadt, Darmstadt, Germany — 2Faculty of Physics, University of Sofia St. Kliment Ohridski, Sofia, Bulgaria — 3Physics Division, ANL, Argonne, IL, USA — 4Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA — 5Triangle Universities Nuclear Laboratory, Duke University, Dunham, NC, USA

In the framework of the IBM-2, a class of excited states is predicted, where the collective valence-neutron and proton motions are out of phase. These so-called mixed-symmetry states (MSS) represent a rare physics case in which the interplay between nuclear collectivity, shell structure, and isospin degrees of freedom can be studied. MSS were observed in nuclei near shell closures in the A = 90, 130 mass regions, and recently near the doubly-magic 208Pb [1]. To extend the knowledge about this data in the A = 208 mass region, projectile Coulomb excitation experiments with stable Hg ion beams were performed at the ATLAS facility at Argonne National Laboratory [2,3].

Supported by the BMBF under Grant No. 05P18RDCIA.
[1] D. Kocheva et al., Phys. Rev. C 93, 011303(R) (2016).
[2] R. Stegmann et al., Phys. Lett. B 770, 77 (2017).
[3] R. Kern et al., Phys. Rev. C 99, 011303(R) (2019).

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