Abstract
The decay of162Yb,162Tm and160Tm has been investigated with Ge(Li) and Si(Li) detectors using isotopically separated samples produced by the YASNAPP facility at Dubna. The singles γ-ray spectrum, β-γ and γ-γ coincidences were measured. Strong ytterbium and thulium activities were used for conversion electron measurements with high resolution magnetic β-spectrographs. 3, 134 and 39 new γ-rays were attributed to the decays of162Yb,162Tm and160Tm, respectively. Decay schemes of these isotopes are proposed. Three and 12 new levels were found in162Er and160Er, respectively. TheQ-values of162Yb,162Tm and160Tm were determined to be ≦2·2, MeV, 4·6±0·3 MeV and 4·9±0·5 MeV, respectively.
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On leave from theUniversity Tashkent, USSR.
On leave fromZfK Rossendorf/Dresden, DDR.
On leave from theNuclear Research Institute, Řež near Prague, CSSR.
On leave from theTechnical University, Dresden, DDR.
It is a pleasure to thank Professor V. P.Dhzelepov, Dr. D.Netzband and Dr. L.Funke for their support. The valuable assistance of the synchrocyclotron staff of the JINR Dubna and of the electronics teams of the measuring centre of the LNP JINR is gratefully acknowledged.
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Strusny, H., Tyrroff, H., Herrmann, E. et al. The decay chain162Yb (19·0 min) →162Tm (21·8 min) →162Er and the decay of160Tm (9·2 min) TO160Er. Czech J Phys 25, 626–643 (1975). https://doi.org/10.1007/BF01591019
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DOI: https://doi.org/10.1007/BF01591019