Edinburgh Research Explorer

Effect of a triaxial nuclear shape on proton tunneling: The decay and structure of Tm145

Research output: Contribution to journalArticle

  • D. Seweryniak
  • B. Blank
  • M.P. Carpenter
  • C.N. Davids
  • N. Hammond
  • R.V.F. Janssens
  • T.L. Khoo
  • G. Mukherjee
  • S. Sinha
  • T. Davinson
  • Z. Liu
  • A.P. Robinson
  • P.J. Woods
  • S.J. Freeman
  • N. Hoteling
  • J. Shergur
  • W.B. Walters
  • C. Scholey
  • K. Starosta
  • A. Woehr

Related Edinburgh Organisations

Original languageEnglish
Article number082502
Number of pages4
JournalPhysical Review Letters
Issue number8
Publication statusPublished - 25 Aug 2007


Gamma rays deexciting states in the proton emitter Tm145 were observed using the recoil-decay tagging method. The Tm145 ground-state rotational band was found to exhibit the properties expected for an h11/2 proton decoupled band. In addition, coincidences between protons feeding the 2+ state in Er144 and the 2+→0+ γ-ray transition were detected, the first measurement of this kind, leading to a more precise value for the 2+ excitation energy of 329(1) keV. Calculations with the particle-rotor model and the core quasiparticle coupling model indicate that the properties of the πh11/2 band and the proton-decay rates in Tm145 are consistent with the presence of triaxiality with an asymmetry parameter γ≈20°. © 2007 The American Physical Society.

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