Bochum 2018 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 3: Structure and Dynamics of Nuclei I
HK 3.2: Vortrag
Montag, 26. Februar 2018, 14:30–14:45, HZO 70
Collinear laser spectroscopy of nickel isotopes at CERN-ISOLDE — •Simon Kaufmann for the COLLAPS-ISCOOL collaboration — TU Darmstadt, Darmstadt, Deutschland
Nickel isotopes 58−68,70Ni were measured using collinear laser spectroscopy at the COLLAPS setup at CERN-ISOLDE. Nickel has the magic proton number 28, the first magic number that is caused by the spin-orbit interaction, and the isotope chain is state-of-the-art in nuclear structure research. Of particular interest are recent ab initio calculations entering into the medium mass region and demonstrating a clear correlation between the charge radius, the neutron radius and the electric dipole polarizability αD in the case of 48Ca [1] which could be confirmed in good agreement in a recent measurement [2]. Our measurements of the mean-square charge radii across up to N=42 shed light into the effect of the sub-shell closure around the N=40 sub-shell closure and help to understand its Z dependence in relation to neighboring elements. Ab initio calculations now become feasible in the nickel mass region as well. Recent αD measurements in 68Ni [3] are now backed up by our experimental value for the mean-square charge radius making this a rare case where both observables are experimentally known and will therefore provide an important new benchmark for ab initio theory.
[1] G. Hagen et al., Nature Physics12, 186-190 (2016)
[2] J. Birkhan et al., Phys. Rev. Lett. 118, 252501 (2017)
[3] D.M. Rossi et al., Phys. Rev. Lett. 111, 242503 (2013)