EffectiveM2andE3Transition Moments for1h112Single-Proton States

Reduced matrix elements $B (M2;1h_{\frac{11}{2}}\to 1g_{\frac{7}{2}})=11.0\mathrm{}\pm 0.6{\left(\frac{e\hslash }{2MC}\right)}^2$ fm${}_{}{}^2{}_{}{}^{}\mathrm{and}$ $B (E3;1h_{\frac{11}{2}}\to 2d_{\frac{5}{2}})=(11.6\mathrm{}\pm 2.2)\times {10}^3{e}^2$ ${\mathrm{fm}}^6$ in ${}_{}{}^{141}{}_{}{}^{}\mathrm{Pr}$ were obtained by studying $\gamma$ rays following the ${}_{}{}^{139}{}_{}{}^{}\mathrm{La}(\alpha ,2n){}_{}{}^{141}{}_{}{}^{}\mathrm{Pr}$ reaction. Detailed analysis of the $M2$ and $E3$ transitions in nuclei with neutron number $\simeq 82$ gave effective coupling constants $g \frac{{}_{}{}^{\mathrm{eff}}{}_{}{}^{}\left(M2\right)}{g\left(M2\right)}\simeq 0.22$, and $g \frac{{}_{}{}^{\mathrm{eff}}{}_{}{}^{}\left(E3\right)}{g\left(E3\right)}\simeq 3$. They were analyzed in terms of the spin-isospin core polarization and the octupole core polarization, respectively.