Levels in 161Tm excited in the decay of 4.2 min 161Yb

Autor: T.M. Muminov, I. Adam, M. Honusek, A. Budziak, Z. Hons, Vladimir V. Kuznetsov, R.R. Usmanov
Rok vydání: 1981
Předmět:
Zdroj: Nuclear Physics A. 356:129-145
ISSN: 0375-9474
DOI: 10.1016/0375-9474(81)90122-6
Popis: The decay of 161 Yb ( T 1 2 = 4.2 min ) has been investigated with Ge(Li) and Si(Li) detectors and a toroidal β-spectrometer. Isobarically separated samples produced by the YASNAPP facility at Dubna Institute were used. The singles γ-ray spectrum, the conversion electron spectrum, γ-γ-τ and e-γ coincidences have been measured. In all, 67 γ-ray transitions have been observed. A decay scheme for 161 Yb is proposed involving 12 excited states in 161 Tm. The 7 2 + [404], 7 2 − [523] and 5 2 + [402] levels have been identified. The interpretation of the high-lying levels is discussed. The Q -value of 161 Yb decay has been determined to be 3850 ± 250 keV. The A -dependence of the energies of the one-quasiparticle states in odd- A Tm isotopes is demonstrated.
Databáze: OpenAIRE