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

Drummond M. C. , O'Donnell D., Page R. D. , Joss D. T. , Capponi L., Cox D. M. , ...More

PHYSICAL REVIEW C, vol.89, no.6, 2014 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 89 Issue: 6
  • Publication Date: 2014
  • Doi Number: 10.1103/physrevc.89.064309
  • Title of Journal : PHYSICAL REVIEW C


The alpha-decay branch of the pi h(11/2) isomer in Ir-164 has been identified using the GREAT spectrometer. The Ir-164 nuclei were produced using the Mo-92(Kr-78, p5n)Ir-164 reaction and separated in flight using the recoil ion transport unit (RITU) gas-filled separator. The measured alpha-decay energy of 6880 +/- 10 keV allowed the excitation of the pi h(11/2) state in Re-160 to be deduced as 166 +/- 14 keV. The half-life of Ir-164 was measured with improved precision to be 70 +/- 10 mu s and an alpha-decay branching ratio of 4 +/- 2% was determined. Improved half-life and branching ratio measurements were also obtained for Ir-165, but no evidence was found for the ground-state decays of either Ir-164 or Ir-165.