Coulomb excitation ofTe125

Abstract

The properties of the low-lying levels of $^{125}\mathrm{Te}$ were investigated by the Coulomb excitation process which was effected by bombarding a thick natural tellurium target with 9.5- and 10.5-MeV $\ensuremath{\alpha}$ particles and a thick target of isotopically enriched $^{125}\mathrm{Te}$ (95%) with 45-MeV $^{16}\mathrm{O}$ ions. Levels at 443.58, 463.39, 671.42, and 729.30 MeV were Coulomb excited and the reduced upward transition probabilities $B(E2\ensuremath{\uparrow})$ (${e}^{2} {\mathrm{b}}^{2}$) extracted from the data were: 0.186 \ifmmode\pm\else\textpm\fi{} 0.005, 0.158 \ifmmode\pm\else\textpm\fi{} 0.005, 0.130 \ifmmode\pm\else\textpm\fi{} 0.004, and 0.0059 \ifmmode\pm\else\textpm\fi{} 0.0008. Angular distribution measurements were performed with 42-MeV $^{16}\mathrm{O}$ ions. The following results were obtained for the $\ensuremath{\gamma}$ rays deexciting the 443.58- ($\frac{3}{{2}^{+}}$) keV level: $\ensuremath{\delta}(408.10)=+0.41(5) or +1.35(12)$, $\ensuremath{\delta}(443.58)=+0.14(4) or \ensuremath{-}2.4(3)$.NUCLEAR REACTIONS $^{125}\mathrm{Te}(\ensuremath{\alpha}, {\ensuremath{\alpha}}^{\ensuremath{'}}\ensuremath{\gamma})$, $E=9.5\ensuremath{-}10.5$ MeV; $^{125}\mathrm{Te}(^{16}\mathrm{O}, ^{16}\mathrm{O}^{\ensuremath{'}}\ensuremath{\gamma})$, $E=42\ensuremath{-}45$ MeV, $^{125}\mathrm{Te}$ deduced levels, $B(E2)$ $B(M1)$, $\ensuremath{\tau}$, $J$, $\ensuremath{\pi}$, $\ensuremath{\gamma}$ branching. Enriched and natural targets.