Charge radius of the short-lived 68Ni and correlation with the dipole 
polarizability

Kaufmann, S.; Simonis, J.; Bacca, S.; Billowes, J.; Bissell, M. L.; Blaum, K.; Cheal, B.; Garcia Ruiz, R. F.; Gins, W.; Gorges, C.; Hagen, G.; Heylen, H.; Kanellakopoulos, A.; Malbrunot-Ettenauer, S.; Miorelli, M.; Neugart, R.; Neyens, G.; Nörtershäuser, W.; Sánchez, R.; Sailer, S.; Schwenk, A.; Ratajczyk, T.; Rodríguez, L. V.; Wehner, L.; Wraith, C.; Xie, L.; Xu, Z. Y.; Yang, X. F.; Yordanov, D. T.

doi:10.1103/PhysRevLett.124.132502

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Charge radius of the short-lived ⁶⁸Ni and correlation with the dipole polarizability

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Blaum, K.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Heylen, H.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Neugart, R.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Schwenk, A.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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2003.06353.pdf
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Citation

Kaufmann, S., Simonis, J., Bacca, S., Billowes, J., Bissell, M. L., Blaum, K., et al. (2020). Charge radius of the short-lived ⁶⁸Ni and correlation with the dipole polarizability. Physical Review Letters, 124(13): 132502. doi:10.1103/PhysRevLett.124.132502.

Cite as: https://hdl.handle.net/21.11116/0000-0006-49B4-D

Abstract

We present the first laser spectroscopic measurement of the neutron-rich nucleus ⁶⁸Ni at the N=40 subshell closure and extract its nuclear charge radius. Since this is the only short-lived isotope for which the dipole polarizability α_D has been measured, the combination of these observables provides a benchmark for nuclear structure theory. We compare them to novel coupled-cluster calculations based on different chiral two- and three-nucleon interactions, for which a strong correlation between the charge radius and dipole polarizability is observed, similar to the stable nucleus ⁴⁸Ca. Three-particle–three-hole correlations in coupled-cluster theory substantially improve the description of the experimental data, which allows to constrain the neutron radius and neutron skin of ⁶⁸Ni.