Étude des désexcitations électromagnétiques des niveaux 1- situés à 12,44 et 13,09 MeV dans le noyau 16O

Brochard, F.; Chevallier, Pierre; Disdier, D.; Rauch, V.; Scheibling, F.

doi:10.1051/jphys:01973003405-6036300

Cited by 23 publications

(47 citation statements)

References 13 publications

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“…The angle integrated cross section data from Ref. [26] is in good agreement with the 15 N(p, γ 0 ) 16 O data in both absolute scale and shape but required a correction of ∼25 keV down in energy. The remaining data from Refs.…”

Section: Discussionsupporting

confidence: 67%

“…Only data from Refs. [26,31] are shown for clarity. The full fit is shown by the dashed black line, the resonance components by the solid red for the 1 − levels, dot-dash-dashed blue line for the 2 + levels, and dot-dashed green line for the 3 − levels.…”

Section: Other Possible Cross Section Contributionsmentioning

confidence: 99%

“…Several experimental examinations have been made of the 12 C(α, γ 0 ) 16 O cross section near the two 1 − levels just above S p which are included in the present analysis [22,25,26,28]. The θ lab = 90 • differential yield data from Ref.…”

mentioning

confidence: 99%

“…For this analysis, the absolute cross section scale was determined by the angle integrated data of Ref. [26]. This is further discussed in Sec.…”

mentioning

confidence: 99%

“…[19] (data from Fig. 3 [31], [26], and [34] (labeled a) through c) respectively). Laboratory proton energy is given on the top horizontal axis, excitation energy on the bottom horizontal axis of each plot.…”

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confidence: 99%

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R-matrix analysis of16O compound nucleus reactions

et al. 2013

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Background Over the last 60 years, a large amount of experimental nuclear data has been obtained for reactions which probe the 16 O compound nucleus near the alpha and proton separation energies, the energy regimes most important for nuclear astrophysics. Difficulties and inconsistencies in R-matrix fits of the individual reactions prompt a more complete analysis.Purpose Determine the level of consistency between the wide variety of experimental data using a multiple entrance/exit channel R-matrix framework. Using a consistent set of data from multiple reaction channels, attain an improved fitting for the 15 N(p, γ0) 16 O reaction data.Methods Reaction data for all available reaction channels were fit simultaneous using a multichannel R-matrix code.Results Over the wide range of experimental data considered, a high level of consistency was found, resulting in a single consistent R-matrix fit which described the broad level structure of 16 O below Ex = 13.5 MeV. The resulting fit was used to extract an improved determination of the low energy S-factor for the reactions 15 N(p, γ) 16 O and 15 N(p, α) 12 C. ConclusionThe feasibility and advantages of a complete multiple entrance/exit channel R-matrix description for the broad level structure of 16 O has been achieved. A future publication will investigate the possible effects of the multiple channel analysis on the reaction 12 C(α, γ) 16 O.

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Section: Discussionsupporting

confidence: 67%

Section: Other Possible Cross Section Contributionsmentioning

confidence: 99%