Recoil-decay tagging spectroscopy of W-162(74)88

H.J. Li, B. Cederwall, T. Back, C. Qi, M. Doncel, U. Jakobsson, K. Auranen, S. Bönig, M.C. Drummond, T. Grahn, P. Greenlees, A. Herzáň, R. Julin, S. Juutinen, J. Konki, T. Kröll, M. Leino, C. McPeake, D. O'Donnell, R.D. PageJ. Pakarinen, J. Partanen, P. Peura, P. Rahkila, P. Ruotsalainen, M. Sandzelius, J. Sarén, B. Sayğı, C. Scholey, J. Sorri, S. Stolze, M.J. Taylor, A. Thornthwaite, J. Uusitalo, Z.G. Xiao

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8 Citations (Scopus)


Excited states in the highly neutron-deficient nucleus 162W have been investigated via the 92Mo(78Kr,2α)162W reaction. Prompt γ rays were detected by the JUROGAM II high-purity germanium detector array and the recoiling fusion-evaporation products were separated by the recoil ion transport unit (RITU) gas-filled recoil separator and identified with the gamma recoil electron alpha tagging (GREAT) spectrometer at the focal plane of RITU. γ rays from 162W were identified uniquely using mother-daughter and mother-daughter-granddaughter α-decay correlations. The observation of a rotational-like ground-state band is interpreted within the framework of total Routhian surface (TRS) calculations, which suggest an axially symmetric ground-state shape with a γ-soft minimum at β2≈0.15. Quasiparticle alignment effects are discussed based on cranked shell model calculations. New measurements of the
162W ground-state α-decay energy and half-life were also performed. The observed α-decay energy agrees with previous measurements. The half-life of 162W was determined to be t1/2=990(30) ms. This value deviates significantly from the currently adopted value of t1/2=1360(70) ms. In addition, the α-decay energy and half-life of 166Os were measured and found to agree with the adopted values.
Original languageEnglish
Article number014326
JournalPhysical Review C
Issue number1
Publication statusPublished - 2015
Externally publishedYes


  • gamma-ray spectroscopy
  • total data readout
  • sape coexistence
  • nuclei
  • detectors
  • region
  • GE


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