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Two-proton spectroscopy of low-lying states in Ne

Research output: Contribution to journalArticle

  • M.J. Chromik
  • P.G. Thirolf
  • M. Thoennessen
  • B.A. Brown
  • T. Davinson
  • D. Gassmann
  • P. Heckman
  • J. Prisciandro
  • P. Reiter
  • E. Tryggestad
  • P.J. Woods

Related Edinburgh Organisations

Original languageEnglish
Pages (from-to)243131-2431312
Number of pages2188182
JournalPhysical Review C
Issue number2
Publication statusPublished - 1 Aug 2002


The decay of the first two excited states of Ne (I=3/2, 5/2) has been studied via intermediate energy Coulomb excitation of a radioactive Ne beam on a Au target using a particle detector setup allowing a kinematically complete detection of the reaction products. Despite the first excited state being bound to single proton emission but unbound with respect to two proton emission, no evidence for a simultaneous two proton decay competing with the known γ decay of the 3/2 state could be observed. The 5/2 state decays via sequential two-proton emission to the ground state of O. The transition matrix elements B(E2,1/2→3/2 =66 e fm and B(E2,1/2→5/2) = 124(18)e fm have been deduced. From the nonobservation of the simultaneous two-proton emission of the 3/2 state a lifetime limit τ>26 ps could be deduced in agreement with recent theoretical calculations.

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