Neutron resonance spectroscopy: Fluorine

This is the authors' abstract. We don't add key points for this paper.

Results are reported of high resolution transmission measurements on Teflon, (CF₂)ₙ, for the total cross section of natural fluorine vs energy from 500 eV to 200 keV. This region has three strong $l=1$ levels which were fitted using a multilevel R-matrix analysis. The best fit (E₀,J,Γₙ) parameters are (26.99, 2, 0.325), (48.78, 1, 1.67), and (97.50, 1, 14.5), where E₀ and Γₙ are in keV. The results are consistent with previous measurements. They yield 10⁴S₁=(11.1_-5.2+12.4) for ¹⁹F using a 5 fm channel redius.NUCLEAR REACTIONS ¹⁹F(n,n), n,γ, E=500 eV-200 keV; measured σₜ(E); deduced E₀, l, J, Γₙ, S₁.