LEVEL STRUCTURE OF PT-196

The 195Pt(n, γ)196Pt reaction has been investigated with the use of numerous experimental techniques. A level scheme has been established consisting of 58 levels below 2.5 MeV, most of which are assigned Jπ values of 0+, 1+, or 2+. Average resonance capture measurements have led to the identification of all 0+, 1+, or 2+ states below 2.5 MeV and the location of the pairing energy gap at ≈ 1.8 MeV. All positive-parity states in 196Pt below the energy gap can be understood in terms of the O(6) limit of the interacting boson approximation (IBA) model. In addition to the positive-parity states, a number of probable negative-parity states have been identified. These states can be understood in terms of a model involving partially decoupled bands. © 1979.