We have used the atomic-beam magnetic-resonance technique to measure the nuclear spin and the hyperfine-structure separation of 18-min Rb88 in the S122 electronic ground state. These results, combined with the Fermi-Segrè formula, yield the nuclear magnetic moment. Our results are: I=2, Δν=±1186.084(18) MHz, μI(uncorr)=±0.506(5) nm, μI(corr)=±0.508(5) nm. Present nuclear theory favors assignment of the negative sign to the value of the moment.
Vanden Bout, Paul A.; Dymanus, Antoni; Ehlers, Vernon J.; and Prior, Michael H., "Nuclear spin, hyperfine-structure separation, and nuclear magnetic moment of 18-min Rb88" (1968). University Faculty Publications. 545.