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## Laser-spectroscopy studies of the nuclear structure of neutron-rich radium

K.M. Lynch et al.

The neutron-rich radium isotopes, ${}^{222-233}\mathrm{Ra}$, were measured with Collinear Resonance Ionization Spectroscopy (CRIS) at the ISOLDE facility, CERN. The hyperfine structure of the $7{s}^{2}\phantom{\rule{0.16em}{0ex}}{}^{1}S_{0}\to 7s7p\phantom{\rule{0.16em}{0ex}}{}^{3}P_{1}$ transition was probed, allowing measurement of the magnetic moments, quadrupole moments, and changes in mean-square charge radii. These results are compared to existing literature values, and the new moments and change in mean-square charge radii of ${}^{231}\mathrm{Ra}$ are presented. Low-resolution laser spectroscopy of the very neutron-rich ${}^{233}\mathrm{Ra}$ has allowed the isotope shift and relative charge radius to be determined for the first time.

Voir en ligne : Phys. Rev. C 97, 024309 (2018)

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