Levels in161Tb excited in the decay of 3·6 min161Gd

The decay of161Gd has been studied using Ge(Li) detectors. The single and coincidence gamma-ray spectra were measured. In comparison with the previous studies more precise gammaray energies and relative intensities are reported. Five formerly unreported weak transitions at 97·0, 152·0, 168·0, 346·0 and 417·0 keV have been assigned to the161Gd decay. The properties of excited levels in the161Tb nuclei are discussed in terms of the collective nuclear model. The effect of the Coriolis coupling has been considered. © 1976 Academia, Publishing House of the Czechoslovak Academy of Sciences