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Level structure of S-30: Implications for the astrophysical P-29(p, gamma)S-30 reaction rate in ONe novae and x-ray bursts

Research output: Contribution to journalArticle

  • G. Lotay
  • J. P. Wallace
  • P. J. Woods
  • D. Seweryniak
  • M. P. Carpenter
  • C. J. Chiara
  • D. T. Doherty
  • R. V. F. Janssens
  • T. Lauritsen
  • A. M. Rogers
  • S. Zhu

Related Edinburgh Organisations

Original languageEnglish
Article number042801
Pages (from-to)-
Number of pages5
JournalPhysical Review C
Volume86
Issue number4
DOIs
StatePublished - 24 Oct 2012

Abstract

A gamma-ray spectroscopy study of S-30 is presented. Excitation energies have been determined with improved precision over previous studies and firm spin-parity assignments have been made for key P-29 + p resonant states. An evaluation of the P-29(p, gamma)S-30 reaction for T = 0.08-2.5 GK shows that the 3(+) and 2(+) resonant states located at E-r = 289(3) and 410(3) keV, respectively, dominate the P-29(p, gamma)S-30 reaction rate in ONe novae, while the 410-keV resonance is expected to govern the rate in x-ray burster environments. These new, precise resonance energy measurements and firm spin-parity assignments have significantly reduced uncertainties in the P-29(p, gamma)S-30 reaction in ONe novae and x-ray bursts. In particular, the reaction rate is now specified precisely enough for calculations of isotopic abundances in ONe novae ejecta.

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