Photoneutron reaction cross sections for 75As and 181Ta: Systematic uncertainties and data reliability

Varlamov, V.; Davydov, A.; Ishkhanov, B.; Kaidarova, V.; Orlin, V.

Авторы: Varlamov Vladimir, Davydov Aleksander, Ishkhanov Boris, Kaidarova Valeriya, Orlin Vadim
Журнал: EPJ Web of Conferences
Том: 239
Год издания: 2020
Первая страница: 01035-1
Последняя страница: 01035-4
DOI: 10.1051/epjconf/202023901035
Аннотация: There is well–known problem of significant systematic disagreements between data for reactions (g, 1n), (g, 2n), obtained at Livermore (USA) and Saclay (France) using the method of photoneutron multiplicity sorting. The averaged ratios RintS/L of integrated cross sections obtained at Saclay and Livermore for 19 nuclei from 51V to 239U are equal to 0.84 for (g, 2n) and 1.07 for (g, 1n) reactions. For 75As RintS/L ratios for both partial reactions are very close (1.22 and 1.21) but for 181Ta – are quite different (0.89 and 1.25). Partial reaction cross-section data were analyzed using the objective physical data reliability criteria. It was found that there are serious doubts in reliability of Saclay data and that Livermore data are in general definitely unreliable. Using the experimental-theoretical method for partial reaction cross-section evaluation, the new reliable data were obtained. The newly reliable evaluated cross sections for both nuclei disagree with experimental data obtained at both Livermore and Saclay. In addition to unreliable sorting of many neutrons between both partial reactions many neutrons were lost – on the case of 181Ta in 1n channel, in the case of 75As in both 1n and 2n channels.
Добавил в систему: Варламов Владимир Васильевич

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Photoneutron reaction cross sections for 75As and 181Ta: Systematic uncertainties and data reliabilityстатья

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