Abstract
The decay of165Yb (T 1/2=9·8 min) has been investigated with Ge(Li), Si(Li) and NaI(Tl) detectors, a toroidal Β-spectrometer and magnetic Β-spectrographs. The isobarically separated samples produced by the YASNAPP facility at the Dubna Institute were used. The single γ-ray spectrum, the conversion electron spectrum, prompt and delayed γ-γ coincidences have been measured. The decay scheme of165Yb involving 40 excited states in165Tm has been proposed. The first members of the rotational bands l/2+[411], 3/2+[411], 5/2+[402], 7/2+[404], 1/2−[541], 7/2−[523] and 9/2−[514] have been identified.
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On leave fromthe Nuclear Physics Institute, Řež near Prague, Czechoslovakia.
On leave fromthe Institute for Nuclear Physics, Uzbek Academy of Sciences, Tashkent,USSR.
On leave fromthe Technical University, Dresden, GDR.
We should like to thank Professor V. P.Dzhelepov for his support. Our thanks are due to M.Jachim for preparing the mass-separated sources. We are indebted to the electronics team of the measuring centre and to the synchrocyclotron staff of the Laboratory of Nuclear Problems.
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Adam, J., Gromov, K.Y., Honusek, M. et al. Levels in165Tm excited by the decay of 9·8 min165Yb. Czech J Phys 28, 865–881 (1978). https://doi.org/10.1007/BF01600094
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DOI: https://doi.org/10.1007/BF01600094