[en] Recently obtained primary transition intensities from two-step gamma-ray cascade investigation in 14 heavy nuclei: ¹³⁷,¹³⁸,¹³⁹Ba, ¹⁴⁶Nd, ¹⁵⁰Sm, ¹⁵⁶,¹⁵⁸Gd, ¹⁶⁰Tb, ¹⁶⁴Dy, ¹⁶⁸Er, ¹⁷⁴Yb, ¹⁸¹Hf, ¹⁹⁶Pt, ¹⁹⁸Au are analyzed. Experiments based on thermal neutron capture were undertaken mainly at the Frank Laboratory of Neutron Physics. Comparing these measured intensities and statistical model predictions, some properties of compound-state depopulation were derived. For the spherical nuclei of ¹³⁷,¹³⁸,¹³⁹Ba and ¹⁴⁶Nd very intense cascades with high-energy primary transitions were observed. Rather different is the behaviour of the cascade intensity in the strongly deformed nuclei of ¹⁵⁶,¹⁵⁸Gd, ¹⁶⁰Tb, ¹⁶⁴Dy, ¹⁶⁸Er and in transitional nucleus of ¹⁵⁰Sm -intensity of primary gamma-rays with E₁ ∼ 2-3 MeV overestimates the calculated value by more than one order of magnitude. 22 refs., 5 figs., 3 tabs

[en] Short note. 2 refs

[en] Intensities of two-quanta cascades are obtained for 2-3 final low-lying levels of the following nuclei ¹⁴⁶Nd, ¹⁷⁴Yb and ¹⁸³W. These measured intensities are compared with the intensities calculated in the frame of various models at primary transition energies ranging from 0.5 MeV to the neutron binding energy. Some excitation energy intervals are revealed, experimentally obtained intensities of cascade are inconsistent with model calculations. 15 refs.; 7 figs

No abstract available

[en] Short note. 4 refs

[en] Using the method of coincident pulse amplitude simulation, the γ-decay scheme of the ¹⁴⁶Nd compound state, excited in the thermal neutron capture by ¹⁴⁵Nd is studied. The comparison between the obtained data on the ¹⁴⁶Nd decay and the results of the last detailed study and compilation results has shown that the set of ¹⁴⁶Nd excited levels below E_m=2.5 MeV can be considered as a complete set. Decay of intermediate levels of this nucleus into ¹⁴⁶Nd finite states with 0 and 454 keV energy can be also considered as practically exact

[en] A method is suggested of a search for nonstatistical regularities in behaviour of the radiative strength function of primary gamma-transitions from the (n,gamma) reaction

[en] In this work a method is suggested of a search for nonstatistical regularities in behaviour of radiative strength fucntion of primary γ-transitions from the (n, γ) reaction. The correlation analysis of the primary γ-transition intensities for the ¹⁷⁴Yb, ¹⁶⁸Er, ¹⁷⁸Hf nuclei has been carried out on the basis of the data from thermal and 2 keV neutron capture experiments. The positive values obtained for the correlation coefficient in the case of ¹⁷⁴Yb and ¹⁶⁸Er allow the conclusion to be made, at a high level of confidence, about the presence of considerable deviations of the radiative strength function from mean statistical value. 20 refs.; 6 figs.; 1 tab

[en] Short communication. 2 refs

[en] The scheme of levels and transitions of ¹⁴⁶ Sm nucleus excited during the decay of ¹⁴⁶ Eu is investigated by the method of γγ coincidences which enables sequential separation of two-quantum cascades of the same energy. The method allowed to add 28 new excited states (43%!) to 65 known states. 16 refs., 2 figs., 9 tabs