The low-energy structure of the $Z=51,\hspace{0.5em}N=82\mathrm{}$ nuclide ${}^{133}\mathrm{Sb}$ has been studied through a high-sensitivity investigation of the ${\beta }^{-}$ decay of ${}^{133}\mathrm{Sn}$. As a result, more than 70 new excited states have been observed and about 100 $\gamma$-ray transitions have been placed in the level scheme. Regarding the single-proton states, the $d_{3/2}$ level was found at 2439.5 keV and for the $h_{11/2}$ state at 2791.3 keV, a half-life of 11.4(4.5) ps has been measured. Levels at higher energies are interpreted as core-coupled states with the $g_{7/2}$ odd proton coupled to the excited states of the ${}^{132}\mathrm{Sn}$ core. A detailed discussion of the beta decay is presented.

• Received 23 December 1998

DOI:https://doi.org/10.1103/PhysRevC.60.024303