Proton unbound states in 21Mg and their astrophysical significance

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Recently, the world's first radioactive 20Na beams have been accelerated at the TRIUMF facility. Using the TRIUMF-UK Detector Array facility we have performed elastic scattering of this beam from protons in a CH2 target with the aim of determining resonance parameters of states in 21Mg. The region of excitation probed in 21Mg has astrophysical importance because resonant contributions to the 20Na(p,γ)21Mg reaction rate are thought to be part of the breakout path from the hot CNO cycle to the rp-process in x-ray bursters and perhaps novae. The data taken also serve a wider purpose in that comparisons may be made to isobaric analogue states in the mirror 21F nucleus, and thus a study of Coulomb energy shifts may be undertaken. An overview of the motivation, of the experiment, and a preliminary analysis of the data taken, is presented.
Original languageEnglish
Pages (from-to)227-234
JournalAIP Conference Proceedings
Publication statusPublished - 1 Sep 2003


  • Nucleosynthesis in novae
  • supernovae
  • and other explosive environments
  • Elastic scattering
  • 20<=A<=38


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