Nuclear Spin and Magnetic Moment of 3.1-hrCs134m

The nuclear spin, hyperfine structure constant and magnetic moment of the excited isomer 3.1-hr ${\mathrm{Cs}}^{134m}$ were determined by means of the atomic beam magnetic resonance method. The intensity of the active species was measured by deposition of the beam on a cold surface and subsequent counting. A spin of $8\left(\hslash \right)$, a hfs $\Delta \nu =3684.3\mathrm{}\pm 0.5$ Mc/sec, and a nuclear moment of 1.10±0.01 nm were found. The nuclear magnetic moment proved to be positive in sign.