Figure 1

Normalized ion and fluorescent ion time-of-flight spectra taken using ${10}^3$ ${}^{\mathrm{96}}\mathrm{Z}\mathrm{r}$ ions per bunch (injected within 10 ms) and stored for (a) 100 ms and (b),(c) 150 ms. The spectra are offset by $70\mu \mathrm{s}$ total flight time and spectrum (c) is further corrected by $\sim 4\mu \mathrm{s}$ corresponding to the path difference from photomultiplier to channelplate detector. Ion bunches in spectra (a) and (b) are observed to arrive at times corresponding to masses 96, $\sim 114$, $\sim 132$ (and heavier) and are assigned to $\mathrm{Z}{\mathrm{r}}^{\mathrm{+}}({\mathrm{H}}_{\mathrm{2}}\mathrm{O}{)}_n$ complexes.Reuse & Permissions

Figure 2

Resonance fluorescence spectrum for ${}^{\mathrm{100}}\mathrm{Z}\mathrm{r}$ taken with $\sim 3000$ ions per sec and a total accumulation time of 2.27 h.Reuse & Permissions

Figure 3

Resonance fluorescence spectrum for ${}^{\mathrm{101}}\mathrm{Z}\mathrm{r}$ taken with $\sim 1500$ ions per sec and a total accumulation time of 24 h. Voigt profile fits to the data, and reduced ${\chi }^2$, are shown for (a) $I=3/2$, and (b) $I=5/2$ (with this spin assignment rejected).Reuse & Permissions

Figure 4

The zirconium mean-square charge radii as a function of neutron number. Measurements on stable isotopes are shown by the full circles and those on fission fragments by the open circles. A $\sim 5\%$ systematic calibration error on $\delta ⟨r^2⟩$ is not shown. (a) Droplet model ${\beta }_2$-isodeformation contours [24] are shown with the experimental data normalized to the reported ${}^{\mathrm{90}}\mathrm{Z}\mathrm{r}$ ${\beta }_2$ deformation [25]. Model-dependent mean-square charge radii, derived using ${\beta }_2$ deformations from nuclear lifetime measurements [25], are shown with uncertainties bounded by the shaded regions. (b) A comparison of the zirconium mean-square charge radii with those in the strontium isotones [9, 10] (indicated by the solid line). The data are set equal at $N=50$ and systematic errors are not shown.Reuse & Permissions