Using ${\mathrm{BaF}}_2$ scintillation counters and a source of ${}_{}{}^{101}{}_{}{}^{}\mathit{Fe}$ we have determined the magnetic moment of the 127 keV first excited state of ${}_{}{}^{101}{}_{}{}^{}\mathrm{Ru}$, using time differential perturbed angular correlations. Via the known hyperfine field of Ru in Fe we deduce g=-0.138(5) and g=-0.142(5) for annealed and quenched sources, respectively, and obtain a new, accurate value of the half-life, $T_{1/2}$=0.655(4) nsec.

• Received 10 February 1986

DOI:https://doi.org/10.1103/PhysRevC.33.2176