Abstract

The literature pertaining to nuclei in the A = 129 mass chain has been examined and the experimental data summarized in the present compilation. A minimum of numerical data is included. Few definitive spin and parity assignments could be made. Decay data for 129Ba indicate the existence of two isomers with nearly equal half-lives. Using unpublished results, the compilers propose these to consist of the g.s., J π = 1/2 +, and a level at 0.2771 MeV, J π = (11/2 −). Efforts have been made to indicte apparent discrepancies in the data. The present compilation might serve as a basis for choosing definitive experiments to augment our knowledge of nuclei in this mass chain.

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