New data on cross sections for partial and total photoneutron reactions on the isotopes [sup.91,94]Zr

Experimental data on [sup.91,94]Zr photodisintegration that were obtained in a beam of quasi-monoenergetic annihilation photons by the method of neutron multiplicity sorting are analyzed. It is found that the cross sections for the (γ, 1n), (γ, 2n), and (γ, 3n) reactions on both isotopes do not meet the objective data-reliability criteria formulated earlier. Within the experimental-theoretical method for evaluating partial-reaction cross sections that satisfy these criteria, new data on the cross sections for the aforementioned partial reactions, as well as for the (γ, sn) = (γ, 1n) + (γ, 2n) + (γ, 3n) + ... total photoneutron reaction, are obtained for the isotopes [sup.91,94]Zr.