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

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

Research output: Contribution to journalArticlepeer-review

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

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