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Identification of a new low-lying state in the proton drip line nucleus Na

Research output: Contribution to journalArticle

  • C. Angulo
  • G. Tabacaru
  • M. Couder
  • M. Gaelens
  • P. Leleux
  • A. Ninane
  • F. Vanderbist
  • T. Davinson
  • P.J. Woods
  • J.S. Schweitzer
  • N.L. Achouri
  • J.C. Angélique
  • E. Berthoumieux
  • F. De Oliveira Santos
  • P. Himpe
  • P. Descouvemont

Related Edinburgh Organisations

Original languageEnglish
Pages (from-to)143081-143084
Number of pages4
JournalPhysical Review C
Volume67
Issue number1
Publication statusPublished - 1 Jan 2003

Abstract

The second excited state (J = 1/2,, l = 0) of the proton-rich nucleus Na has been observed for the first time using the elastic scattering reaction H(Ne, H) Ne. An intense (4 × 10 pps) Ne radioactive beam was produced at the CRC-RIB facility at Louvain-la-Neuve to bombard a polyethylene target. The recoil protons were detected at 20 different angles in the LEDA segmented silicon detector. The resulting elastic scattering cross sections have been analyzed using a global R-matrix. fit. We find that the second excited state in Na lies at the center-of-mass energy E = 1.066±0.003 MeV with respect to the Ne+p threshold, and has a proton width Γ = 101±3 keV. The Coulomb shift between the 1/2 mirror levels in O and Na is 0.73 MeV, among the largest values currently observed in light exotic nuclei.

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