alpha decay of the pi h(11/2) isomer in Ir-164

M.C. Drummond, D. O'Donnell, R.D. Page, D.T. Joss, L. Capponi, D.M. Cox, I.G. Darby, L. Donosa, F. Filmer, T. Grahn, P.T. Greenlees, K. Hauschild, A. Herzan, U. Jakobsson, P.M. Jones, R. Julin, S. Juutinen, S. Ketelhut, M. Leino, A. Lopez-MartensA.K. Mistry, P. Nieminen, P. Peura, P. Rahkila, S. Rinta-Antila, P. Ruotsalainen, M. Sandzelius, J. Saren, B. Saygi, C. Scholey, J. Simpson, J. Sorri, A. Thornthwaite, J. Uusitalo

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8 Citations (Scopus)

Abstract

The α-decay branch of the πh11/2 isomer in Ir164 has been identified using the GREAT spectrometer. The Ir164 nuclei were produced using the 92Mo(78Kr,p5n)164Ir reaction and separated in flight using the recoil ion transport unit (RITU) gas-filled separator. The measured α-decay energy of 6880±10 keV allowed the excitation of the πh11/2 state in Re160 to be deduced as 166±14 keV. The half-life of Ir164 was measured with improved precision to be 70±10μ s and an α-decay branching ratio of 4±2% was determined. Improved half-life and branching ratio measurements were also obtained for Ir165, but no evidence was found for the ground-state decays of either Ir164 or Ir165.
Original languageEnglish
Article number064309
JournalPhysical Review C
Volume89
Issue number6
DOIs
Publication statusPublished - 16 Jun 2014
Externally publishedYes

Keywords

  • neutron-deficient isotopes
  • total data readout
  • proton dripline
  • nuclear structure
  • emission
  • tungsten
  • osmium
  • energy
  • model
  • ritu

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