Levels in ${}^{196}\mathrm{Pt}$ have been studied via the ${}^{196}\mathrm{Pt}{(n,n}^{\prime }\gamma )$ reaction for a range of neutron energies from 1 to 8 MeV. A “white” spectrum of neutrons was produced at the LANSCE/WNR facility, and the incident neutron energy was determined by the time-of-flight technique. Analysis of measured $\gamma \gamma$ coincidence data and γ-ray excitation functions, obtained with the large-scale Compton-suppressed Ge spectrometer GEANIE, yielded 13 new levels and 24 new $\gamma$ rays below $E_x=3\mathrm{}\hspace{0.5em}\mathrm{MeV}$ in ${}^{196}\mathrm{Pt}.$ Interacting boson model (IBM) calculations with broken SO(6) dynamical symmetry were performed. A new experimental level was found to be a prime candidate for the $J^{\pi }{=4\mathrm{}}^{+},$ $\sigma =6,\hspace{0.5em}\tau =5\mathrm{}$ IBM state.

• Received 24 December 2001

DOI:https://doi.org/10.1103/PhysRevC.65.064309