Edinburgh Research Explorer

Superallowed α Decay to Doubly Magic 100Sn

Research output: Contribution to journalArticle

  • K Auranen
  • D. Seweryniak
  • M Albers
  • A. D. Ayangeakaa
  • S Bottoni
  • M P Carpenter
  • C. J. Chiara
  • P Copp
  • H. M. David
  • D. T. Doherty
  • J Harker
  • C.R. Hoffman
  • R V F Janssens
  • T. L. Khoo
  • S A Kuvin
  • T. Lauritsen
  • G Lotay
  • A. M. Rogers
  • J Sethi
  • C. Scholey
  • R Talwar
  • W. B. Walters
  • S. Zhu

Related Edinburgh Organisations

Open Access permissions


Original languageEnglish
JournalPhysical Review Letters
Publication statusPublished - 30 Oct 2018


We report the first observation of the 108Xe→104Te→100Sn α-decay chain. The α emitters, 108Xe [Eα=4.4(2)  MeV, T1/2=58+106−23  μs] and 104Te [Eα=4.9(2)  MeV, T1/2<18  ns], decaying into doubly magic 100Sn were produced using a fusion-evaporation reaction 54Fe(58Ni,4n)108Xe, and identified with a recoil mass separator and an implantation-decay correlation technique. This is the first time α radioactivity has been observed to a heavy self-conjugate nucleus. A previous benchmark for study of this fundamental decay mode has been the decay of 212Po into doubly magic 208Pb. Enhanced proton-neutron interactions in the N=Z parent nuclei may result in superallowed α decays with reduced α-decay widths significantly greater than that for 212Po. From the decay chain, we deduce that the α-reduced width for 108Xe or 104Te is more than a factor of 5 larger than that for 212Po.

Download statistics

No data available

ID: 77942570