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Evaluation of reliable partial and total photoneutron reaction cross sections for 145,148Ndтезисы доклада
- Авторы: Varlamov V.V., Kaydarova V.D.
- Сборник: LXVIII INTERNATIONAL CONFERENCE «NUCLEUS 2018». FUNDAMENTAL PROBLEMS OF NUCLEAR PHYSICS, ATOMIC POWER ENGINEERING AND NUCLEAR TECHNOLOGIES (LXVIII MEETING ON NUCLEAR SPECTROSCOPY AND NUCLEAR STRUCTURE). BOOK OF ABSTRACTS. July 2-6, 2018. Voronezh, Russia
- Тезисы
- Год издания: 2018
- Место издания: Saint-Petersburg
- Первая страница: 98
- Последняя страница: 98
- Аннотация: Experimental data on partial and total photonuclear reaction cross sections for nuclei 145,148Nd obtained at Saclay (France) using quasimonoenergetic annihilation photons and the neutron multiplicity sorting based on its energy measurement were analyzed. The analysis was based on the objective physical criteria of data reliability - ratios Fi = SIG(g,in)/SIG(g,xn) = SIG(g,in)/[SIG(g,1n) + 2SIG(g,2n) + …], which have values not higher than 1.00 and 0.50. In many research carried out before for many medium and heavy nuclei it was shown that values F2 > 0.50 and F1 < 0 mean that experimental neutron multiplicity sorting has been done erroneously because of large systematic uncertainties. The third criterion of data reliability was found on the base of comparison of experimental Fiexp with Fitheor, calculated in the frame of the combined model of photonuclear reactions. It was shown that if Fiexp noticeably differ from Fitheor one has definite doubts in experimental data reliability. For both isotopes 145,148Nd it was shown that experimental data are not reliable. Therefore new reliable partial photoneutron reaction cross sections were evaluated using the experimentally-theoretical method: SIGeval(g,in) = Ftheori SIGexp(g,xn). It means that competition between partial reactions is in accordance with the model and their sum SIGeval(g,xn) is equal to SIGexp(g, xn) free from neutron multiplicity sorting problems. It was found that there are noticeable disagreements between evaluated and experimental data. It is shown that those deviations are the results of unreliable and erroneous redistribution of many neutrons between the channels with multiplicities “1” and “2”. Since the newly evaluated data noticeably differ from Saclay experimental data, a discussion of the physical consequences is needed.
- Добавил в систему: Варламов Владимир Васильевич
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | *.pdf in English | Varl-sec_145148Nd_2018.pdf | 10,1 КБ | 12 июля 2018 [Varlamov] |