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Partial Photoneutron Reaction Cross Sections on 115In and Neutron Multiplicity Sortingтезисы доклада
- Авторы: Varlamov V.V., Peskov N.N., Stepanov M.E.
- Сборник: LXII International Conference NUCLEUS 2012 “Fundamental Problems of Nuclear Physics, Atomic Power Engineering and Nuclear Technologies”, June 25 – 30, 2012, Voronezh, Russia. Book of Abstracts
- Тезисы
- Год издания: 2012
- Место издания: Saint-Petersburg University Saint-Petersburg
- Первая страница: 87
- Последняя страница: 87
- Аннотация: For isotope 115In the combined analysis was carried out for experimental data for cross sections of total photoneutron yield reaction SIG(g,xn) = SIG(g,n) + 2SIG(g,2n) + 3SIG(g,3n) + …and partial photoneutron reactions included obtained using bremsstrahlung and quasimonoenergetic annihilation photons. The systematic disagreements between the various experiments data were analyzed. Significant disagreements between various experiments data were revealed. For investigation of partial reaction cross section data reliability and authenticity the special transitional multiplicity sorting functions Fi = SIG(g,in)/SIG(g,xn) were introduced. Those are clear simple and absolute criteria of neutron multiplicity sorting. Absolute values of Fi must be < 1.00 for i = 1, 0.50 for i = 2, 0.33 for i = 3, etc. and larger absolute values mean that neutron multiplicity sorting was carried out incorrectly – that resulted in appearance of non-physical ranges of negative values in SIG(g,n) cross section. As the way of such kind problems taking into account and disagreements overcoming the new experimental-theoretical treatment to evaluation of partial reaction cross sections for SIG(g,n) and SIG(g,2n) reaction cross sections free from shortcomings of experimental neutron multiplicity sorting methods was applied. In that only SIG(g,xn) reaction cross section free from neutron multiplicity sorting problems was used as initial and for reliable description of various decay channels competition the equations of modern model of photonuclear reactions was used - SIG-eval(g,in) = Fi-theor • SIG-exp(g,xn). New reliable and authentic evaluated cross section data for reactions 115In(g,n)114In and 115In(g,2n)113In were obtained. Large (till 20 - 30 %) deviations of those from the experimental ones are discussed first of all from the point of view of important physical sequences.
- Добавил в систему: Варламов Владимир Васильевич