Edinburgh Research Explorer

The astrophysically important 3 state in Ne and the F(p, γ)Ne stellar rate

Research output: Contribution to journalArticle

  • D.W. Bardayan
  • J.C. Blackmon
  • C.R. Brune
  • A.E. Champagne
  • A.A. Chen
  • J.M. Cox
  • T. Davinson
  • V.Y. Hansper
  • M.A. Hofstee
  • B.A. Johnson
  • R.L. Kozub
  • Z. Ma
  • P.D. Parker
  • D.E. Pierce
  • M.T. Rabban
  • A.C. Shotter
  • M.S. Smith
  • K.B. Swartz
  • D.W. Visser
  • P.J. Woods

Related Edinburgh Organisations

Original languageEnglish
Pages (from-to)558041-5580414
Number of pages5022374
JournalPhysical Review C
Volume62
Issue number5
StatePublished - 1 Nov 2000

Abstract

Knowledge of the F(p, γ)Ne reaction rate is important for understanding stellar explosions, but it was uncertain because the properties of an expected but previously unobserved 3 state in Ne were not known. This state would provide a strong s-wave resonance for the F+p system and, depending on its excitation energy, could dominate the stellar reaction rate at temperatures above 0.2 GK. We have observed this missing 3 state by measuring the H(F,p)F excitation function with a radioactive F beam at the ORNL Holifield Radioactive Ion Beam Facility (HRIBF). We find that the state lies at a center-of-mass energy of E = 599.8 ± 1.5±2.0 keV (E = 4523.7±2.9 keV) and has a width of Γ = 18±2±1 keV. The measured properties of the resonance are only consistent with a J = 3 assignment.

ID: 14693985