Charge Radius of the Short-Lived Ni68 and Correlation with the Dipole Polarizability

We present the first laser spectroscopic measurement of the neutron-rich nucleus Ni68 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 αD has been measured, the combination of these observables provides...

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Veröffentlicht in:Physical review letters 2020-04, Vol.124 (13), p.1
1. Verfasser: Kaufmann, S
Format: Artikel
Sprache:eng
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Zusammenfassung:We present the first laser spectroscopic measurement of the neutron-rich nucleus Ni68 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 αD 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 Ca48. 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 Ni68.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.124.132502