Magnetic Moments of the7−and5−(πh92,νg92) States inBi210

The $g$ factors of the 433-keV $7^{-}$ state and the 439-keV $5^{-}$ state in ${}_{}{}^{210}{}_{}{}^{}\mathrm{Bi}$ which are predominantly ($\pi h_{\frac{9}{2}}$, $\nu g_{\frac{9}{2}}$) have been measured as $g\left(7^{-}\right)=0.302\mathrm{}\pm 0.007$ and $g\left(5^{-}\right)=0.306\mathrm{}\pm 0.009$ by a time-differential method using the reaction ${}_{}{}^{208}{}_{}{}^{}\mathrm{Pb}({}_{}{}^7{}_{}{}^{}\mathrm{Li},\alpha n){}_{}{}^{210}{}_{}{}^{}\mathrm{Bi}$. From these experimental results, a magnetic moment for the $g_{\frac{9}{2}}$ neutron of $\mu =-(1.33\mathrm{}\pm 0.06){\mu }_N$ [$g\left(\nu g_{\frac{9}{2}}\right)=-0.296\mathrm{}\pm 0.014$] has been deduced. This $g_{\frac{9}{2}}$-neutron magnetic moment is in agreement with the Schmidt value corrected for core polarization.