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

Abstract
The level density and radiative strength functions obtained for the compound nuclei ⁴⁰K, ⁶⁰Co, ^71,74Ge, ⁸⁰Br, ¹¹⁴Cd, ¹¹⁸Sn, ^124,125Te, ¹²⁸I, ^137,138,139Ba, ¹⁴⁰La, ¹⁵⁰Sm, ^156,158Gd, ¹⁶⁰Tb, ^163,164,165Dy, ¹⁶⁶Ho, ¹⁶⁸Er, ¹⁷⁰Tm, ¹⁷⁴Yb, ^176,177Lu, ¹⁸¹Hf, ¹⁸²Ta, ^{183,184,185,187}W, ^{188,190,191,193}Os, ¹⁹²Ir, ¹⁹⁶Pt, ¹⁹⁸Au, ²⁰⁰Hg 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.