(ii) METHOD AND SET-UP FOR MEASUREMENTS OF TRACE LEVEL CONTENT OF HEAVY FISSIONABLE ELEMENTS BASED ON DELAYED NEUTRON COUNTING

The experimental studies of the energy dependence of the delayed neutron parameters for various fissioning systems has shown that the behavior of a some combination of delayed neutron parameters (group relative abundances ai and half lives Ti) has a similar features. On the basis of this findings the systematics of delayed neutron experimental data for thorium, uranium, plutonium and americium isotopes have been investigated with the purpose to find a correlation of DN parameters with characteristics of fissioning system as well as a correlation between the delayed neutron parameters themselves. Below we will present the preliminary results which were obtained during this study omitting the physics interpretation of the results