Paramagnetic Resonance Absorption in Uranium (III) Chloride and the Nuclear Spin, Magnetic Dipole Moment, and Electric Quadrupole Moment of Uranium-233

Paramagnetic resonance absorption in single crystals of ${\mathrm{U}}^{233}$ ${\mathrm{Cl}}_3$ diluted with La${\mathrm{Cl}}_3$ has been investigated. The values of the parameters in the appropriate Hamiltonian are given. The values of the nuclear spin, magnetic dipole moment, and electric quadrupole moment obtained from these studies are discussed. The ratios of the mo ments of ${\mathrm{U}}^{235}$ and ${\mathrm{U}}^{233}$, which can be obtained with much higher accuracy than the individual moments, are given.