ИСТИНА

In continuation to evaluation of partial and total photoneutron reaction cross sections for 188,189Os isotopes carried out in the frame of experimentally-theoretical approach using special criteria of data reliability new evaluated data were obtained for isotopes 186,190,192Os on the base of experimental data for photoneutron yield reaction cross section SIGexp(G,xn) = SIGexp[(G,n) + 2SIG(G,2n) + 3SIG(G,3n) + …]. New data evaluated by the way SIGeval(G,in) = Ftheori • SIGexp(G,xn) are reliable being obtained in conditions free from shortcomings of experimental measurement of outgoing neutron multiplicity sorting. Energy dependencies of new reliable evaluated SIG(G,n), SIG(G,2n) and SIG(G,3n) cross section data for 186,188,189,190,192Os were compared to each other and to correspondent energy dependencies of neutron multiplicity functions Fi = SIG(G,in)/SIG(G,xn) = SIG(G,in)/SIG[(G,1n) + 2(G,2n) + 3(G,3n) + …]. It was shown that deviations of Fexpi from Fthori are individual for separate isotopes and are clear dependent on the shape of outgoing neutrons spectra. The differences in various reactions energy thresholds play definite role certainly. That confirms the supposition proposed before that the complex connection of neutron multiplicity and its kinetic energy is one of important sources of systematic uncertainties of neutron multiplicity sorting. New evaluated cross sections were obtained for 186,188,189,190,192Os partial (G,n), (G,2n), (G,3n), and total photoneutron reaction SIG[(G,1n) + (G,2n) + (G,3n) + …] ~ SIG(G,abs) reactions cross sections. Data for 186Os(G,2n)184Os reaction are discussed from the point of view of astrophysical problems of formation of p–isotope 184Os can not be produced in traditional s– and r–processes.