We have developed a new technique for determining Landé g factors of atoms by the measurement of hyperfine intervals as a function of an applied static magnetic field. This approach is widely applicable and has distinct advantages over previous methods. As an example, we have measured the $g_J$ factor of the 5$p^4$5d ${\mathrm{}}^4$${\mathrm{D}}_{7/2}$ level of Xe ii to be 1.420(14). The potential accuracy is considerably greater.

• Received 7 August 1986

DOI:https://doi.org/10.1103/PhysRevA.35.1611