On the Nuclear Magnetic Moments of the Isotopes of Rubidium and Chlorine

The molecular beam, magnetic resonance method has been applied to the measurement of the nuclear gyromagnetic ratios of Rb⁸⁷, Rb⁸⁵, Cl³⁷ and Cl³⁵. The g values are 1.820±{}0.006, 0.536±{}0.002, 0.454±{}0.002 and 0.546±{}0.002, respectively. The magnetic moments of Rb⁸⁷ and Rb⁸⁵, obtained from the observed g values and the known nuclear spins, are 2.741±{}0.009 and 1.345±{}0.005, respectively. The substantial agreement of the moment ratio μ₈₇μ₈₅, 2.038, found by this method, with that obtained from atomic beam measurements indicates that any contribution to h.f.s. by a form of interaction between electron and nucleus not electromagnetic in character is small. A nuclear moment of 1.365±{}0.005 is obtained for Cl³⁵ if one takes the band spectra spin value of 5/2 for this nucleus. No information concerning the spin of Cl³⁷ is available.