Some peculiarities of two-quantum γ-cascades at radiative capture of neutrons by 164Dy nuclei

Two-quantum γ-cascades with a fixed sum of their energies, 5142-5715 keV, have been selected in the reaction 164Dy(n, 2γ)165Dy. The sum of their intensities ammounts to 54% of the total radiative width. It is found that the shape of the intensity distribution for these cascades is not described in the framework of the statistical theory. The enhancement of the cascades via the levels with the excitation energy of 2-4 MeV can neither be explained with account for fluctuations of the widths of the primary γ-transitions