MASS-SPECTROMETER METHOD OF DETERMINATION OF NEUTRONS CROSS -SECTIONS IN MATERIALS

For precision measurements of effective cross-sections of neutrons capture bythe nuclei of the investigated samples the new method of measurement was developed.The method is based on the registration of heavy fragments of fission reaction of nuclei under the action of the reactor neutrons with the help of the mass-spectrometer.The method allows to measure of neutron cross-sections with the relative accuracy lessthan 1 %.