The spins of ${\mathrm{I}}^{123}$, ${\mathrm{I}}^{124}$, and ${\mathrm{I}}^{131}$ have been measured by the method of atomic beams; the spins are $\frac{5}{2}$, 2, and $\frac{7}{2}$, respectively. The result $I=\frac{7}{2}$ for ${\mathrm{I}}^{131}$ confirms an earlier measurement by a different method.

• Received 26 March 1958

DOI:https://doi.org/10.1103/PhysRev.111.534