The lifetimes of members of the ground-state bands in ${}_{}{}^{192}{}_{}{}^{}\mathrm{Pt}$ and ${}_{}{}^{194}{}_{}{}^{}\mathrm{Pt}$ have been measured by the Doppler-shift recoil-distance technique. These states were Coulomb excited by 149 MeV ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ar}$ ions and measurements were carried out in coincidence with backscattered projectiles. The half-lives of the $2^{+}$, $4^{+}$, and $6^{+}$ states in ${}_{}{}^{192}{}_{}{}^{}\mathrm{Pt}$ and of the $2^{+}$ and $4^{+}$ states in ${}_{}{}^{194}{}_{}{}^{}\mathrm{Pt}$ are 48.5±2.5, 4.2±0.2, 1.8±0.7, 45.0±2.4, and 3.7±0.2 ps, respectively.

NUCLEAR REACTIONS ${}_{}{}^{192,194}{}_{}{}^{}\mathrm{Pt}({}_{}{}^{40}{}_{}{}^{}\mathrm{Ar}_{}^{\prime }{}_{}{}^{}, \gamma )$, $E=149\mathrm{}$ MeV; measured lifetimes of $2^{+}$, $4^{+}$, and $6^{+}$ states in ${}_{}{}^{192}{}_{}{}^{}\mathrm{Pt}$ and of $2^{+}$ and $4^{+}$ states in ${}_{}{}^{194}{}_{}{}^{}\mathrm{Pt}$; deduced $B\left(E2\mathrm{}\right)\mathrm{}$ values, compared with theory.

• Received 18 October 1976

DOI:https://doi.org/10.1103/PhysRevC.15.1325