Charge Radius of the Short-Lived <SUP>68</SUP>Ni and Correlation with the Dipole Polarizability

Kaufmann, S, Simonis, J, Bacca, S, Billowes, J, Bissell, ML, Blaum, K, Cheal, B, Ruiz, RF Garcia, Gins, W, Gorges, C
et al (show 19 more authors) (2020) Charge Radius of the Short-Lived <SUP>68</SUP>Ni and Correlation with the Dipole Polarizability. PHYSICAL REVIEW LETTERS, 124 (13). 132502-.

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We present the first laser spectroscopic measurement of the neutron-rich nucleus ^{68}Ni 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 ^{48}Ca. 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 ^{68}Ni.

Item Type: Article
Additional Information: 6 pages, 3 figures
Uncontrolled Keywords: nucl-ex, nucl-ex, nucl-th
Depositing User: Symplectic Admin
Date Deposited: 03 Apr 2020 10:47
Last Modified: 14 Oct 2023 11:35
DOI: 10.1103/PhysRevLett.124.132502
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