Blocking Effect of theM1Core Polarization Studied from thegFactor of the8+State inRa214

The $g$ factor of the $8^{+}$ state of ${}_{}{}^{214}{}_{}{}^{}\mathrm{Ra}$ ($T_{\frac{1}{2}}=67\mathrm{}$μsec) has been determined to be $g=0.88\mathrm{}\pm 0.01$ by the in-beam $\gamma$-ray NMR method. The blocking effect of the $\left[{{\pi }_{\frac{11}{2}}}^{-1\mathrm{}}\pi h_{\frac{9}{2}}\right]-1^{+}$ - type core polarization on $g$ factors of $\pi {h_{\frac{9}{2}}}^n$ states is investigated. The observed blocking effect is much less than the theoretical expectation, implying that the correction to the $g$ factor of the $\pi h_{\frac{9}{2}}$ state because of [$\pi {h_{\frac{11}{2}}}^{-1\mathrm{}}\pi h_{\frac{9}{2}}$] $1^{+}$ excitation is comparable with that because of [$\nu {i_{\frac{13}{2}}}^{-1\mathrm{}}\nu i_{\frac{11}{2}}$] $1^{+}$.