Measurements of binding energies and electromagnetic moments of silver isotopes – A complementary benchmark of density functional theory
R. P. de Groote, D. A. Nesterenko, A. Kankainen, M. L. Bissell, O. Beliuskina, J. Bonnard, P. Campbell, L. Cañete, B. Cheal, C. Delafosse, A. de Roubin, C. S. Devlin, J. Dobaczewski, T. Eronen, R. F. García Ruíz, S. Geldhof, W. Gins, M. Hukkanen, Phillip Imgram, R. Mathieson, Á. Koszorús, I. D. Moore, I. Pohjalainen, M. Reponen, Ben van den Borne, M. Vilén, S. Zadvornaya
Abstract
We report on a set of high-precision measurements of nuclear binding and excitation energies, as well as nuclear spins, magnetic dipole and electric quadrupole moments of neutron-rich silver isotopes, 113−123Ag. The measurements were performed using the JYFLTRAP mass spectrometer and the collinear laser spectroscopy beamline at the Ion Guide Isotope Separator On-Line (IGISOL) facility. For the first time, we can firmly establish the ordering of the long-lived Iπ=1/2−,7/2+ states in these isotopes, and pin down the inversion of these two levels at either A=121(N=74) or A=123(N=76). We compare these findings to calculations performed with density functional theory (DFT), from which we establish the crucial role that the spin-orbit strength and time-odd mean fields play in the simultaneous description of electromagnetic moments and nuclear binding.