Completely model-free determination of the level density, radiative strength functions and their main peculiaritiesA. Sukhovoj1, V. Khitrov1 and V. Maslov2
1 Joint Institute for Nuclear Reaserch, 141980 Dubna, Russia
2 Joint Institute for Nuclear and Energy Reaserch, 220109 Minsk-Sosny, Belarus
Published online: 21 May 2008
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, 183,184,185,187W, 188,190,191,193Os, 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 Bn a sharp change in the structure of excited levels is observed at two excitation energies at least.
© CEA 2008