The α decay of ${}_{}{}^{182}{}_{}{}^{}\mathrm{Pb}$ was identified in bombardments of ${}_{}{}^{147}{}_{}{}^{}\mathrm{Sm}$ with ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}$ ions. Its α-decay energy and half-life were determined to be 6.919±0.015 MeV and ${55}_{\mathrm{-}35}^{+40\mathrm{}}$ ms, respectively. The nuclidic assignment was based on excitation-function and cross-bombardment ${(}^{39}$K${+}^{147}$Sm) data and on decay-energy systematics. From the known mass of ${}_{}{}^{178}{}_{}{}^{}\mathrm{Hg}$ and the 6.919-MeV α-decay energy we deduce the mass excess of ${}_{}{}^{182}{}_{}{}^{}\mathrm{Pb}$ to be (-6823±25) keV. Also, a half-life of 300±80 ms was measured for ${}_{}{}^{183}{}_{}{}^{}\mathrm{Pb}$.

• Received 12 February 1987

DOI:https://doi.org/10.1103/PhysRevC.35.2330