The α decay of ${}_{}{}^{194}{}_{}{}^{}\mathrm{Pb}$ [$E_{\alpha }$=4.64±0.02 MeV, α branch=(7.3±2.9)×${10}^{\mathrm{-}6}$%] was identified for the first time, and a comprehensive decay scheme was constructed for the isotope’s β-decay branch. This scheme consists of 29 excited levels built on the $2^{\mathrm{-}}$ ${}_{}{}^{194}{}_{}{}^{}\mathrm{Tl}$ ground state and incorporates 91 γ-ray transitions. Based on the decays of several strong transitions, the half-life of ${}_{}{}^{194}{}_{}{}^{}\mathrm{Pb}$ was measured to be 12.0±0.5 min. The ${}_{}{}^{194}{}_{}{}^{}\mathrm{Pb}$ α reduced width, calculated with these data, is less than those of Pb, Hg, and Pt nuclei with A≤192, indicating that the Z=82 gap is perhaps being restored for N≥112.

• Received 17 February 1987

DOI:https://doi.org/10.1103/PhysRevC.36.1529