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HK: Fachverband Physik der Hadronen und Kerne

HK 27: Structure and Dynamics of Nuclei V

HK 27.3: Vortrag

Dienstag, 19. März 2019, 17:15–17:30, HS 14

Spectroscopy of neutron-rich Sc isotopes at RIKEN-RIBF — •P. Koseoglou^1,2, V. Werner¹, P.-A. Söderström^1,2, M. Lettmann¹, N. Pietralla¹, P. Doornenbal³, and A. Obertelli^1,3,4 for the SEASTAR17 collaboration — ¹Institut für Kernphysik, TU-Darmstadt, Darmstadt, Germany — ²GSI Helmoltzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany — ³RIKEN Nishina Center, Wako, Japan — ⁴IRFU, CEA, Université Paris-Saclay, Paris, France

Evidence for the existence of a new "magic number", N=34, are observed in ⁵⁴Ca [1] but not in Ti isotopes [2,3]. The magic number N=34 was recently shown to vanish already in ⁵⁵Sc [4]. The evolution of proton orbitals on the ⁵⁵⁻⁶¹Sc isotopes may reveal the mechanism of the disappearance of the N=34 magicity, and further elucidate the early onset of collectivity at N=40, which has so far been observed in Cr and Fe isotopes. The status of the analysis of ⁵⁵⁻⁵⁹Sc data from the 3rd SEASTAR campaign at RIKEN-RIBF will be presented. In this analysis, gamma rays previously reported for ⁵⁵Sc [4] were confirmed. For ⁵⁷⁻⁵⁹Sc gamma rays are shown here for the first time and possible level schemes will be proposed. This work was supported by the Helmholtz Graduate School for Hadron and Ion Research (HGS-HIRe) for FAIR though the HGS-HIRe abroad program.
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