Charge radius of the short-lived $^{68}$Ni and correlation with the dipole polarizability
Abstract
We present the first laser spectroscopic measurement of the neutron-rich nucleus Ni at the \mbox{} subshell closure and extract its nuclear charge radius. Since this is the only short-lived isotope for which the dipole polarizability 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 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 Ni.
Keywords
Cite
@article{arxiv.2003.06353,
title = {Charge radius of the short-lived $^{68}$Ni and correlation with the dipole polarizability},
author = {S. Kaufmann and J. Simonis and S. Bacca and J. Billowes and M. L. Bissell and K. Blaum and B. Cheal and R. F. Garcia Ruiz and W. Gins and C. Gorges and G. Hagen and H. Heylen and A. Kanellakopoulos and S. Malbrunot-Ettenauer and M. Miorelli and R. Neugart and G. Neyens and W. Nörtershäuser and R. Sánchez and S. Sailer and A. Schwenk and T. Ratajczyk and L. V. Rodríguez and L. Wehner and C. Wraith and L. Xie and Z. Y. Xu and X. F. Yang and D. T. Yordanov},
journal= {arXiv preprint arXiv:2003.06353},
year = {2020}
}
Comments
6 pages, 3 figures