Isospin mixing of the 5605 and 5668 keV states in 18f in the light of a new state at 5603 keV

Thermonuclear reaction rate ofO17(p,γ)F18Fox1, Iliadis2, Champagne3 et al. 2005Phys. Rev. C6311983View full textAdd to dashboardCite

“…(ii) The resonance strength in the 14 N(α, γ ) 18 F reaction has been measured; the average value of the results reported by Refs. [22][23][24][25] amounts to (ωγ ) αγ = 0.44 ± 0.02 eV. (iii) The α partial width was deduced from an R-matrix analysis of 14 N(α,α) scattering data [26], with the result of α = 130 ± 5 eV.…”

“…Their result is based on the value of γ = 1.4 ± 0.3 eV [26], which was calculated from the measured α value [26] and a "strength of (ωγ ) αγ = 1.37 ± 0.19 eV" from Ref. [24]. However, the latter value represents the quantity (2 J + 1) α γ / instead of (ωγ ) αγ [Eq.…”

Resonance strengths of some light nuclei

“…3. The y-ray yields were corrected for effects of finite target thickness [1], angular distributions [11,12,24], relative efficiencies [17] and branching ratios [11,12,24]. These yields Y~ relative to that for the 6.13 MeV y-ray transition lead to the relative resonance strengths coy using similar equations as quoted in Sect.…”

High-intensity-beam study ofO17(p,γ)F18and thermonuclear reaction

“…This value was obtained in the extensive work of Chafa et al [17] and results in a resonance energy of E cm r = 64.5 ± 0.5 keV, where the quoted uncertainty is dominated by the proton separation energy. Three resonance properties have been measured for this resonance: the (p,α) resonance strength, ωγ pα = (4.7 ± 0.8) × 10 −9 eV [13,55]; the (α,γ) resonance strength, ωγ αγ = 0.44 ± 0.02 eV [44,[57][58][59]; and the α-particle partial width, Γ α = 130 ± 5 eV [54]. Solving for the individual partial widths, we find values of Γ p = (19.0 ± 3.2) × 10 −9 eV, Γ α = 130 ± 5 eV, and Γ γ = 0.44 ± 0.02 eV.…”