New data on photoneutron reaction cross sections for 76,78,80,82Se nucleiстатья
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Дата последнего поиска статьи во внешних источниках: 26 июня 2019 г.
Аннотация:The problem of reliability of partial photoneutron cross-section data obtained using beam of quasimonoenergetic photons produced by annihilation in flight of fast positrons and the method of neutron multiplicity-sorting procedure at Saclay (France) for 76,78,80,82Se is discussed using objective physical data reliability criteria. It was shown that experimental data for (g, 1n), (g, 2n) reactions cross sections are not reliable because of significant systematic uncertainties. New data for reliable partial photoneutron reaction cross sections for 76,78,82Se satisfying reliability criteria were obtained using experimental-theoretical method of partial reaction cross section evaluation and are compared with the experimental data and with data for isotope 80Se evaluated before. Evaluated integrated cross sections of total photoneutron reaction for 76,78,80,82Se are compared with the estimations of the classical dipole sum rule of Thomas, Reiche and Kuhn.