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

K.M. Lynch , S.G. Wilkins , J. Billowes , C.L. Binnersley , M.L. Bissell , K. Chrysalidis , T.E. Cocolios , T. Day Goodacre , R.P. de Groote , G.J. Farooq-Smith , D.V. Fedorov , V.N. Fedosseev , K.T. Flanagan , S. Franchoo (1) , R.F. Garcia Ruiz , W. Gins , R. Heinke , Á. Koszorús , B.A. Marsh , P.L. Molkanov , P. Naubereit , G. Neyens , C.M. Ricketts , S. Rothe , C. Seiffert , M.D. Seliverstov , H.H. Stroke , D. Studer , A.R. Vernon , K.D.A. Wendt , X.F. Yang

1 IPNO - Institut de Physique Nucléaire d'Orsay

The neutron-rich radium isotopes, Ra222−233, were measured with Collinear Resonance Ionization Spectroscopy (CRIS) at the ISOLDE facility, CERN. The hyperfine structure of the 7s2S01→7s7pP13 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 Ra231 are presented. Low-resolution laser spectroscopy of the very neutron-rich Ra233 has allowed the isotope shift and relative charge radius to be determined for the first time.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

K.M. Lynch, S.G. Wilkins, J. Billowes, C.L. Binnersley, M.L. Bissell, et al.. Laser-spectroscopy studies of the nuclear structure of neutron-rich radium. Phys.Rev.C, 2018, 97 (2), pp.024309. ⟨10.1103/PhysRevC.97.024309⟩. ⟨hal-01719622⟩