Nuclear Orientation ofNd147

Abstract

Neodymium-147 was aligned and polarized at low temperatures in a neodymium ethylsulfate lattice. A saturation correction for susceptibility was verified. The effect of nondiagonal interactions on nuclear orientation was illustrated. Spin assignments of $\frac{5}{2}+$, $\frac{3}{2}+$, $\frac{5}{2}+$, and $\frac{5}{2}+$ were made for the excited states of ${\mathrm{Pm}}^{147}$ at 91, 410, 531, and 686 kev, respectively. Mixing ratios were obtained for six mixed $\gamma$ rays in ${\mathrm{Pm}}^{147}$. The magnitude of the amplitude mixing ratio $\delta \left(\frac{E2\mathrm{}}{M1\mathrm{}}\right)$ was found to be approximately proportional to $\gamma$-ray energy. Evidence was obtained that the $\beta$ branches with end points at 0.23, 0.38, and 0.81 Mev are mostly of the $L=0\mathrm{}$ type.