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 |
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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. |
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ISSN: | 0031-9007 1079-7114 |
DOI: | 10.1103/PhysRevLett.124.132502 |