Abstract

The atomic-beam magnetic-resonance method has been used to measure the nuclear spin and hyperfine structure of 6.8-day ${\mathrm{Lu}}^{177}$ in the ground $^{2}D_{\frac{3}{2}}$ state and in the $^{2}D_{\frac{5}{2}}$ electronic state. The results are: $I=\frac{7}{2}$; $^{2}D_{\frac{3}{2}}$: $a=194.84(2)$ Mc/sec, $b=1466.71(12)$ Mc/sec; $^{2}D_{\frac{5}{2}}$: $a=147.17(1)$ Mc/sec, $b=1805.93(14)$ Mc/sec. The uncorrected nuclear moments for ${\mathrm{Lu}}^{177}$ calculated from these measurements and from known constants of ${\mathrm{Lu}}^{175}$ are: ${\ensuremath{\mu}}_{I}=+2.217(10)$ nm, $Q=+5.51(6)$ b.

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