Cross sections of the photoneutron reaction for 141Pr and 186W nuclei, estimated from physical criteria of data reliability

Varlamov, V.V.; Orlin, V.N.; Peskov, N.N.

Авторы: Varlamov V.V., Orlin V.N., Peskov N.N.
Журнал: Bulletin of the Russian Academy of Sciences: Physics
Том: 81
Номер: 6
Год издания: 2017
Издательство: Allerton Press Inc.
Местоположение издательства: United States
Первая страница: 670
Последняя страница: 678
DOI: 10.3103/S1062873817060259
Аннотация: Using objective physical criteria for data reliability, cross sections of partial photoneutron reactions (γ, 1n), (γ, 2n) and (γ, 3n) that are free of the shortcomings of neutron multiplicity sorting methods used on beams of quasimonoenergetic annihilation photons are obtained for 141Pr and 186W nuclei. Evaluation is performed using the experimental–theoretical method (ETM), based on the experimental cross section of neutron yield reaction σexp(γ, xn) = σexp(γ, 1n) + 2 σexp(γ, 2n) + 3 σexp(γ, 3n) + … and ratios = Fitheor = σtheor(γ,in)/σtheor(γ, xn) calculated within the combined model (CM) of photonuclear reactions, which stipulates that σeval(γ, in) = Fitheor x σexp(γ, xn). It is found that for 141Pr and 186W, ratios Fiexp do not contradict the data reliability criteria only at energies up to ~21 and ~22 MeV, respectively. At the same time, there are notable discrepancies between Fitheor and Fiexp, and thus between the evaluated and experimental cross sections of reactions. It is shown that the discrepancies between the evaluated and experimental cross sections are due to the assumed unreliable experimental distribution of neutrons in the channels with multiplicities 1, 2, and 3.
Добавил в систему: Варламов Владимир Васильевич

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Cross sections of the photoneutron reaction for 141Pr and 186W nuclei, estimated from physical criteria of data reliabilityстатья

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