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Physical reliability criteria and specific features of data on photodisintegration of 75As, 127I, 181Ta, and 208Pb nucleiстатья
Информация о цитировании статьи получена из
Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 26 января 2022 г.
- Авторы: Varlamov V.V., Davydov A.I.
- Журнал: Physics of Atomic Nuclei
- Том: 84
- Номер: 5
- Год издания: 2021
- Издательство: Pleiades Publishing, Ltd
- Местоположение издательства: Road Town, United Kingdom
- Первая страница: 603
- Последняя страница: 614
- DOI: 10.1134/S1063778821050148
- Аннотация: The known problem of significant systematic discrepancies between the cross sections obtained for partial photoneutron reactions using beams of quasimonoenergetic annihilation photons by means of neutron multiplicity sorting at Saclay (France) and Livermore (USA) is considered in detail for 75As, 127I, 181Ta, and 208Pb nuclei by employing objective physical criteria of data reliability. The integrated cross section ratios σintS/σintL obtained for (γ, 1n) and (γ, 2n) reactions on the basis of data from the two laboratories in question differ significantly for the last three of the aforementioned nuclei but are nearly coincident for the 75As nucleus. For all four nuclei, the cross sections for (γ, xn) = (γ, 1n) + 2(γ, 2n) + 3(γ, 3n) photoneutron yield reactions differ significantly even at photon energies below the thresholds for the (γ, 2n) reactions, in which case no problem of neutron multiplicity sorting arises. Experimental data on partial and total photoneutron reaction cross sections for 75As, 127I, 181Ta, and 208Pb nuclei are compared with their counterparts evaluated within the experimental–theoretical method that employs data reliability criteria. It is found that the discrepancies of several tens of percent between the cross sections obtained for the (γ, xn), (γ, sn) = (γ, 1n) + (γ, 2n) + (γ, 3n), and (γ, 1n) reactions at Livermoreand evaluated data are due to an unjustified and unreliable underestimation of the cross section for the (γ, 1n) reaction because of the loss of a significant number of neutrons from this reaction.
- Добавил в систему: Варламов Владимир Васильевич
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | *.pdf на английском | PHAN603.pdf | 925,0 КБ | 28 сентября 2021 [Varlamov] |