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München 2019 – wissenschaftliches Programm

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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. Koseoglou1,2, V. Werner1, P.-A. Söderström1,2, M. Lettmann1, N. Pietralla1, P. Doornenbal3, and A. Obertelli1,3,4 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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D.-C. Dinca, et al., Phys. Rev. C 71, 041302(R) (2005).
S. N. Liddick, et al., Phys. Rev. Lett. 92, 072502 (2004).
D. Steppenbeck, et al. Phys. Rev. C 96 , 064310 (2017).

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