Testing Compound Nucleus Hypothesis Across the <sup>17</sup>O Nucleus Excitation

Nizigama, Aloys; Tamagno, Pierre; Bouland, O.

doi:10.1051/epjconf/201921102001

Cited by 1 publication

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“…Data from evaluations are historically constrained by neutron spectroscopy and evaluators usually rely on the method of the data inversion to treat reciprocal reactions. Even if a straight comparison of data [7] within the RRR validates the data inversion hypothesis, this method remains not recommended since it relies on the assumption of the formation of the same excited compound nucleus or accordingly, the total absence of the direct and semi-direct phenomena.…”

Section: The Excited Compound-system Center Of Mass Frameworkmentioning

confidence: 99%

New perspectives in neutron reaction cross-section evaluation using consistent multichannel modeling methodology: Application to ¹⁷O^*

2020

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The traditional methodology of nuclear data evaluation is showing its limitations in reducing significantly the uncertainties in neutron cross sections below their current level. This suggests that a new approach should be considered. This work aims at establishing that a major qualitative improvement is possible by changing the reference framework historically used for evaluating nuclear model data. The central idea is to move from the restrictive framework of the incident neutron and target nucleus to the more general framework of the excited compound-system. Such a change, which implies the simultaneous modeling of all the reactions leading to the same compound-system, opens up the possibility of direct comparisons between nuclear model parameters, whether those are derived for reactor physics applications, astrophysics or basic nuclear spectroscopy studies. This would have the double advantage of bringing together evaluation activities performed separately, and of pooling experimental databases and basic theoretical nuclear parameter files. A consistent multichannel modeling methodology using the TORA module of the CONRAD code is demonstrated across the evaluation of differential and angle-integrated neutron cross sections of 16O by fitting simultaneously incident-neutron direct kinematic reactions and incident-alpha inverse kinematic reactions without converting alpha data into the neutron laboratory system. The modeling is fulfilled within the Reich-Moore formalism and an unique set of fitted resonance parameters related to the 17O* compound-system.

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Section: The Excited Compound-system Center Of Mass Frameworkmentioning

confidence: 99%

New perspectives in neutron reaction cross-section evaluation using consistent multichannel modeling methodology: Application to ¹⁷O^*

2020

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Testing Compound Nucleus Hypothesis Across the ¹⁷O Nucleus Excitation

Cited by 1 publication

References 12 publications

New perspectives in neutron reaction cross-section evaluation using consistent multichannel modeling methodology: Application to ¹⁷O^*

New perspectives in neutron reaction cross-section evaluation using consistent multichannel modeling methodology: Application to ¹⁷O^*

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Testing Compound Nucleus Hypothesis Across the 17O Nucleus Excitation

Cited by 1 publication

References 12 publications

New perspectives in neutron reaction cross-section evaluation using consistent multichannel modeling methodology: Application to 17O*

New perspectives in neutron reaction cross-section evaluation using consistent multichannel modeling methodology: Application to 17O*

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Testing Compound Nucleus Hypothesis Across the ¹⁷O Nucleus Excitation

New perspectives in neutron reaction cross-section evaluation using consistent multichannel modeling methodology: Application to ¹⁷O^*

New perspectives in neutron reaction cross-section evaluation using consistent multichannel modeling methodology: Application to ¹⁷O^*