Nuclear Lifetime andgFactor of the19/2−Isomeric State inSc43

The lifetime and the $g$ factor of the ${19/2}^{-}$ three-quasiparticle isomeric state ${|{\left(\nu f_{\frac{7}{2}}\right)}_{6^{+}}^2-(\pi f_{\frac{7}{2}}\left)\right|}_{{\frac{19}{2}}^{-}}$ in ${}_{}{}^{43}{}_{}{}^{}\mathrm{Sc}$ have been measured. Both the time-differential perturbed-angular-distribution and the stroboscopic-resonance methods were used in the $g$-factor determination. The results obtained are $\tau =0.65\mathrm{}\pm 0.02$ μsec and $g({\frac{19}{2}}^{-},{}_{}{}^{43}{}_{}{}^{}\mathrm{Sc})=+0.331\mathrm{}\pm 0.002$. The $g$ factor of the $f_{\frac{7}{2}}$ proton, deduced from present results combined with the $g$ factor of the $6^{+}$ state in ${}_{}{}^{42}{}_{}{}^{}\mathrm{Ca}$, is discussed.