Binding energies, charge radii, spins and moments: odd-odd Ag isotopes and discovery of a new isomer

Abstract

We report on the masses and hyperfine structure of ground and isomeric states in ${}^{114,116,118,120}$Ag isotopes, measured with the phase-imaging ion-cyclotron-resonance technique (PI-ICR) with the JYFLTRAP mass spectrometer and the collinear laser spectroscopy beamline at the Ion Guide Isotope Separator On-Line (IGISOL) facility, Jyväskylä, Finland. We measured the masses and excitation energies, electromagnetic moments, and charge radii, and firmly established the nuclear spins of the long-lived states. A new isomer was discovered in ${}^{118}$Ag and the half-lives of ${}^{118}$Ag long-lived states were reevaluated. We unambiguously pinned down the level ordering of all long-lived states, placing the inversion of the $I=0^{-}$ and $I=4^{+}$ states at $A=118$ $(N=71)$. Lastly, we compared the electromagnetic moments of each state to empirical single-particle moments to identify the dominant configuration where possible.

11 pages paper (excl. references) + 3 pages of supplementary material