Nuclear Magnetic Moment and Hyperfine-Structure Anomaly ofNa24

The nuclear magnetic dipole moment and the hyperfine structure of ${\mathrm{Na}}^{24}$ have been studied using a high-precision atomic-beam resonance method to give ${\mu }_I=1.6902\mathrm{}\left(5\right)\mathrm{}$ nm (corrected for atomic diamagnetism) and ${\Delta }_{\nu }=1\mathrm{}139332580\left(100\right)\mathrm{}$ Hz. The hyperfine-structure anomaly of ${\mathrm{Na}}^{24}$ compared with ${\mathrm{Na}}^{23}$ is given by ${}_{23}{}^{}{}_{}{}^{}\Delta _{24}^{}{}_{}{}^{}=+0.00002\mathrm{}\left(30\right)\mathrm{}$.