Angular correlation and nuclear orientation study ofI131populated in the decay ofTem131

Abstract

Some additional levels are proposed in the decay scheme of $^{131}\mathrm{Te}^{m}$. From angular correlation and nuclear orientation measurements the spin and parity of several levels are determined uniquely: 774 keV (${\frac{11}{2}}^{+}$), 852 keV (${\frac{9}{2}}^{+}$), 1060 keV (${\frac{9}{2}}^{+}$), 1315 keV (${\frac{9}{2}}^{+}$), 1556 keV (${\frac{15}{2}}^{+}$), 1596 keV (${\frac{13}{2}}^{+}$), 1646 keV (${\frac{11}{2}}^{\ensuremath{-}}$), 1797 keV (${\frac{15}{2}}^{\ensuremath{-}}$), 1899 keV (${\frac{13}{2}}^{\ensuremath{-}}$), 1980 keV (${\frac{11}{2}}^{\ensuremath{-}}$), and 2001 keV (${\frac{9}{2}}^{\ifmmode\pm\else\textpm\fi{}}$ or ${\frac{11}{2}}^{+}$). The $\ensuremath{\delta}(\frac{E2}{M1})$ ratios for the different transitions are obtained. The magnetic moment of the $^{131}\mathrm{Te}$ isomeric state is derived: $\ensuremath{\mu}=(\ensuremath{-}1.04\ifmmode\pm\else\textpm\fi{}0.04){\ensuremath{\mu}}_{N}$.RADIOACTIVITY $^{131}\mathrm{Te}^{m}$ from $^{130}\mathrm{Te}(n, \ensuremath{\gamma})$; measured $\ensuremath{\gamma}\ensuremath{\gamma}(\ensuremath{\theta})$, ${I}_{\ensuremath{\gamma}}(\ensuremath{\theta}, T)$. $^{131}\mathrm{I}$ deduced $J$, $n$, $\ensuremath{\delta}(\frac{E2}{M1})$; $^{131}\mathrm{Te}^{m}$ deduced $\ensuremath{\mu}$. Ge(Li) detectors.