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

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

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
Volume92
Issue number1
DOIs
Publication statusPublished - 2015
Externally publishedYes

    Fingerprint

Keywords

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

Cite this

Li, H. J., Cederwall, B., Back, T., Qi, C., Doncel, M., Jakobsson, U., Auranen, K., Bönig, S., Drummond, M. C., Grahn, T., Greenlees, P., Herzáň, A., Julin, R., Juutinen, S., Konki, J., Kröll, T., Leino, M., McPeake, C., O'Donnell, D., ... Xiao, Z. G. (2015). Recoil-decay tagging spectroscopy of W-162(74)88. Physical Review C, 92(1), [014326 ]. https://doi.org/10.1103/PhysRevC.92.014326