New 19Ne Level Observed with a Thick Target 18F(p,p)18F Measurement

Details New 19Ne Level Observed with a Thick Target 18F(p,p)18F Measurement New 19Ne Level Observed with a Thick Target 18F(p,p)18F Measurement

Jul 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005nupha.758..737b&link_type=abstract

Nuclear Physics A, Volume 758, p. 737-740.

Physics

Nuclear Physics

2

Scientific paper

The rates of the 18F(p, α)15O and 18F(p, γ)19Ne reactions in astrophysical environments depend on the properties of 19Ne levels above the 18F +p threshold. There are at least 8 levels in the mirror nucleus 19F for which analogs have not been observed in 19Ne in the excitation energy range E=6.4 7.6 MeV. These levels may significantly enhance the 18F +p reaction rates, and thus we have made a search for these levels by measuring the 1H(18F,p)18F excitation function over the energy range E=0.3-1.3 MeV. We have identified and measured the properties of a newly observed level at E=7.420±0.014 MeV, which is most likely the mirror to the J=719F level at 7.56 MeV. We have additionally found a significant discrepancy with a recent compilation for the properties of a 19Ne state at E=7.5 MeV and set upper limits on the proton widths of missing levels.

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