LEVEL STRUCTURE OF ODD-MASS IN NUCLEI AND THE UNIFIED MODEL .2. IN-117 LEVELS POPULATED IN THE DECAY OF CD-117 ISOMERS

Ge(Li) detectors have been used to perform singles, coincidence, and angular correlation measurements on γ rays present in the decays of 2.5-h Cdg117(12+) and 3.4-h Cdm117(112-). A total of 112 of the 114 γ rays observed in the decay of Cdg117 and all 71 of the γ rays observed in the decay of Cdm117 have been placed in a level scheme consisting of 46 excited states. A total of 51 different γ-γ cascades were measured at 90° and 180°. The β branchings from Cdg117 to Inm117 and Cdm117 to Ing117 were determined to be 20.4% and < 1%, respectively. The thermal neutron cross sections for the production of Cdg117 and Cdm117 were determined to be 43±2 mb and 8±1 mb, respectively. Spin and parity assignments for the levels of In117 were made in many instances. The level structure is discussed in relation to the unified model calculation and possible one-proton-two-neutron configurations. RADIOACTIVITY Cdg117 and Cdm117 [from Cd116(n,γ)]; measured Eγ, Iγ, γ-γ coin, γ-γ(θ); deduced β branch, logft, σ(n,γ), A22, δ. In117 deduced levels, J, π. Enriched target, Ge(Li) detectors, Compton suppression. © 1979 The American Physical Society.