Spins of Indium-109, Indium-110m, and Indium-111

The nuclear spins of three neutron-deficient radioactive isotopes of indium have been measured by the use of the atomic-beam magnetic-resonance technique. Results are $I=\frac{9}{2}$ for 4.3-hr ${\mathrm{In}}^{109}$; $I=7\mathrm{}$ for 5.0-hr ${\mathrm{In}}^{110m}$; and $I=\frac{9}{2}$ for 2.8-day ${\mathrm{In}}^{111}$.