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Laser-assisted nuclear decay spectroscopy of 176,177,179Au

  • R.D. Harding
  • , Andrei N. Andreyev
  • , Anatoly (A.E.) Barzakh
  • , Cubiss James G.
  • , Piet Van Duppen
  • , Numa A. Althubiti
  • , Boris Andel
  • , Stanislav Antalic
  • , Thomas Elias Cocolios
  • , Thomas Day Goodacre
  • , Kristof Dockx
  • , Gregory James Farooq-Smith
  • , Dmitry V. Fedorov
  • , Valentin N. Fedosseev
  • , Daniel A. Fink
  • , Liam Paul Gaffney
  • , Lars Ghys

Research outputpeer-review

Abstract

A study of the laser-ionized and mass-separated neutron-deficient isotopes 176,177,179Au was performed using the Resonance Ionization Laser Ion Source and the Windmill detection setup at ISOLDE, CERN. New and improved data on complex fine-structure α decays of the three isotopes were deduced, providing insight into the low-lying levels in the daughter nuclei 172,173,175Ir. New information on the properties of β-decay daughter products 177,179Pt was also obtained. From the first in-source laser spectroscopy measurements of the hyperfine structure in the atomic 267.6-nm transition of 176Au, the nuclear magnetic moments for both high- and low-spin α-decaying states were deduced. Together with the values determined from the additivity relations, they were used to propose the most probable spins and configurations for both states. The α-decay branching ratios were determined as bα (176Auls ) = 58(5)% and bα (176Auhs ) = 29(5)%.
Original languageEnglish
Article number024326
Pages (from-to)1-16
Number of pages16
JournalPhysical Review C
Volume104
DOIs
StatePublished - 23 Aug 2021

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