First Direct Measurement of the 17F(p,gamma)18Ne Cross Section

Authors :: K A, Chipps
D W, Bardayan
J C, Blackmon
K Y, Chae
U, Greife
R, Hatarik
R L, Kozub
C, Matei
B H, Moazen
C D, Nesaraja
S D, Pain
W A, Peters
S T, Pittman
J F, Shriner
M S, Smith
Source :: Physical review letters. 102(15)
Publication Year :: 2008
Abstract: The rate of the (17)F(p,gamma)(18)Ne reaction is important in various astrophysical events. A previous (17)F(p,p)(17)F measurement identified a 3;{+} state providing the strongest resonance contribution, but the resonance strength was unknown. We have directly measured the (17)F(p,gamma)(18)Ne reaction using a mixed beam of (17)F and (17)O at ORNL. The resonance strength for the 3;{+} resonance in (18)Ne was found to be omegagamma = 33 +/- 14(stat) +/-1 7(syst) meV, corresponding to a gamma width of Gamma_{gamma} = 56 +/- 24(stat) +/- 30(syst) meV. An upper limit on the direct capture of S(E)or= 65 keV b was determined at an energy of 800 keV.

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