Levels of 16O near 13 MeV excitation from 15N + P reactions

Bray, K.H.; Frawley, A. D.; Ophel, T.R.; Barker, F.C.

doi:10.1016/0375-9474(77)90139-7

Cited by 22 publications

(16 citation statements)

References 22 publications

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“…[29] is found to be inconsistent with the fit. This angular distribution lies on the high energy side of the 3 − resonance at E x = 13.26 MeV (E p = 1.208 MeV).…”

Section: Discussionmentioning

confidence: 88%

“…One difference in this reaction channel is that the broad 2 + level at E x = 12.97 MeV contributes enough to make it critical in reproducing the angular distribution data as demonstrated in Ref. [29] and shown in Fig. 50.…”

Section: Other Possible Cross Section Contributionsmentioning

confidence: 94%

“…Addition data considered in this reaction channel include the angular distributions of Refs. [29,31], the higher energy differential cross section measurements of Refs. [18,20,21] and the yield ratio data of Ref.…”

Section: Other Possible Cross Section Contributionsmentioning

confidence: 99%

“…In addition, Ref. [29], note that they had to make adjustments of about 5 keV to the data of Ref. [20] in order to produce agreement with their measurements.…”

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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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“…[29] is found to be inconsistent with the fit. This angular distribution lies on the high energy side of the 3 − resonance at E x = 13.26 MeV (E p = 1.208 MeV).…”

Section: Discussionmentioning

confidence: 88%

Section: Other Possible Cross Section Contributionsmentioning

confidence: 94%

Section: Other Possible Cross Section Contributionsmentioning

confidence: 99%

“…In addition, Ref. [29], note that they had to make adjustments of about 5 keV to the data of Ref. [20] in order to produce agreement with their measurements.…”

mentioning

confidence: 99%

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R-matrix analysis of16O compound nucleus reactions

et al. 2013

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“…The 15 N(p, p) 15 N cross section has been well measured at angles close to 90 degrees [4,5], therefore this angle was chosen as the angle of reference. The relative geometric factors (ldΩ) were determined from the yields at the peak of the 1 − resonance at E p = 1.034 MeV which has been shown to be isotropic, at 90 degrees and more backward angles, to an accuracy of ∼10 percent [4,11]. Therefore, a systematic uncertainty of 10 percent is recommended for the 15 N(p, p) 15 N and 15 N(p, α 0 ) 12 C yield ratio data of this work.…”

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confidence: 99%

Elastic scattering of protons from15N

et al. 2012

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12 C was measured concurrently. Results: Ratios of the excitation functions were extracted from the yield data. Resonances were identified in the yield ratio data which correspond to previously reported levels in 16 O. An R-matrix analysis, which fits the present data as well as previous measurements from the literature simultaneously, finds reasonable agreement between the current measurements and those in the literature. Conclusions: The additional data from this measurement will be combined with previous literature data in a comprehensive R-matrix analysis of reactions which populate 16 O over a similar energy region.

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8-Oxygen

Sukhoruchkin

Soroko

2004

Tables of Proton and Α-Particle Resonance Parameters. Part 1

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Levels of 16O near 13 MeV excitation from 15N + P reactions

Cited by 22 publications

References 22 publications

R-matrix analysis of16O compound nucleus reactions

R-matrix analysis of16O compound nucleus reactions

Elastic scattering of protons from15N

8-Oxygen

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