gfactor of the(59/2−isomer inGd147

The g factor of the 10 995 keV, $J^{\pi }$ ${=(59/2\mathrm{}}^{\mathrm{-}}$, and $T_{1/2}$=0.8 ns level in ${}_{}{}^{147}{}_{}{}^{}\mathrm{Gd}$ has been determined by the transient field method for ions recoiling through a magnetized Gd foil at a temperature of 100 K. The ${}_{}{}^{76}{}_{}{}^{}\mathrm{Ge}$ ${(}^{76}$Ge,5n${)}^{147}$Gd reaction at E${(}^{76}$Ge)=310 MeV was used to provide high recoil velocity. A 100 ps flight time in vacuum between the target and the ferromagnet of 100 ps ensured that the γ-ray cascades fed the (59/2 level before the recoil ions traversed the Gd foil. The g factor was extracted from standard double ratios with the known parametrization of the transient field, yielding g=0.38(7). This value is in agreement with the predicted wave function and experimental single-particle moments in this mass region. Results for levels in ${}_{}{}^{146}{}_{}{}^{}$,148Gd were also obtained.