Completely model-free determination of the level density, radiative strength functions and their main peculiarities

Abstract

Ta, 183,184,185,187 W, 188,190,191,193 Os, 192 Ir, 196 Pt, 198 Au, 200 Hg precisely reproduce the intensities of two-step cascades, density and total radiation widths of neutron resonance. For 21 nuclei cascade populating ability ∼100 of their excited levels were also reproduced. The averaged strength functions values and the deviations of the level density from the interpolating exponential dependence suggest that below B n a sharp change in the structure of excited levels is observed at two excitation energies at least.