The sign of the magnetic dipole moment of ${\mathrm{Li}}^8$ has been found experimentally to be positive, in agreement with theoretical expectation. Rates of transition among the Zeeman levels were compared for the two senses of circular polarization of a resonant rf field (1977 kc/sec in 3139 gauss). The short half-life (0.85 sec) of ${\mathrm{Li}}^8$ required use of the polarized neutron-activation, beta-emission anisotropy detection, method previously applied to the measurement of the ${\mathrm{Li}}^8$ nuclear $g$ factor.

• Received 10 January 1962

DOI:https://doi.org/10.1103/PhysRev.126.1506