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Photodisintegration of 127I: Systematic Uncertainties of Experiments and Data Evaluated Using Physical Criteriaстатья
- Авторы: Varlamov Vladimir V., Davydov Aleksandr I., Orlin Vadim N.
- Журнал: American Journal of Physics and Applications
- Том: 8
- Номер: 5
- Год издания: 2020
- Издательство: Science Publishing Group
- Местоположение издательства: New York, USA
- Первая страница: 64
- Последняя страница: 72
- Номер статьи: 1221280
- DOI: 10.11648/j.ajpa.20200805.11
- Аннотация: The experimental data for photoneutron reaction cross sections for 127I obtained using beams ofquasimonoenergetic annihilation photons and the method of neutron multiplicity-sorting at Livermore (USA) and Saclay (France) were analyzed using objective physical data reliability criteria. It was found that data of both laboratories contain significant systematic uncertainties and therefore are not reliable. New data for partial and total photoneutron reactions cross sections for 127I satisfied physical criteria of data reliability were evaluated using experimental-theoretical method based on both experimental neutron yield reaction cross-section and results of calculation in the combined photonucleonreaction model (CPNRM). The neutron yield reaction cross-section obtained at Saclay (France) was used in evaluation procedure. The newly evaluated cross sections for partial (γ, 1n), (γ, 2n) and (γ, 3n) reactions for 127I were used for discussion in detail the problems of significant disagreements between experimental data for many nuclei obtained at Saclay and Livermore. It was found that systematic uncertainties of experimental data for the (γ, 1n), (γ, 2n), and (γ, 3n) reactionscross sections for 127I obtained at both laboratories are of different nature. One of the reasons of noticeable systematicuncertainties of cross sections obtained are the shortcomings of the procedures used to separate counts into 1n, 2n, and 3n events. At the same time it was shown that the main reason of significant disagreements between new evaluated data and data obtained at Livermore experiment for 127I is the loss of many neutrons from the (γ, 1n) reaction. This situation is analogous to those in Livermore experiments for 75As and 181Ta.
- Добавил в систему: Варламов Владимир Васильевич
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | *.pdf на английском | 10.11648.j.ajpa.20200805.11.pdf | 1,4 МБ | 29 сентября 2020 [Varlamov] |