[en] A method is proposed for seeking nonstatistical trends in the behavior of the radiative strength function of the primary γ transitions from the (n,γ) reaction. Existing data are used to analyze the correlations in the intensity of the primary transitions for the nuclei ¹⁷⁴Yb, ¹⁶⁸Er, and ¹⁷⁸Hf in the capture of thermal neutrons and in the capture of neutrons with an average energy E_n = 2 keV. The positive correlation coefficients found for ¹⁷⁴Yb and ¹⁶⁸Er are very strong evidence that the radiative strength functions for these nuclei differ significantly from the mean open-quotes statisticalclose quotes values. 20 refs., 6 figs., 1 tab

[en] The background structures remained in the differential spectra of two-quantum cascades after background subtraction by the method described in the preprint of the JINR P6-87-98 make difficult these spectra interpretation and reduce the SACP measurements energy interval. The idea of a two-step background subtraction is discussed. On the example of ¹⁷⁰Lu decay it was demonstrated that this new method of Compton background subtration results in full disappearance of these unwanted bachground structures. 3 refs.; 6 figs

[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] When the compton background is subtracted by the Bogdzel method, background structures remain in the differential spectrum of two-quantum cascades, which impede the interpretation of the spectra and decrease energy range of measurements in the spectrum. The idea of a two-stage subtraction of the background is discussed. Using ¹⁷⁰Lu decay by way of example, it is shown that the new method of the background subtraction results in total disappearance of the above-mentioned background structures in differential spectra. 3 refs.; 6 figs

[en] Spectral composition of 333 cascades of two γ-transitions terminating by six low-lying levels of ¹⁶⁴Dy is measured. The total intensity of the permitted cascades makes up 45.9 (15)% of the compound-state decays. 150 cascades are located in the decay scheme using the method which does not depend on the traditional ones. 7 refs., 2 figs., 4 tabs

[en] 189 cascades of γ-transitions of ¹⁵⁰Sm compound-state decay, which were excited during thermal neutron capture by ¹⁴⁹Sm, were studied. New information on the properties of nucleus states, intermediate between spheric and deformed ones in a nonstudied region of nuclear excitations 2 MeV< E_exc.< B_n was obtained. 8 refs.; 4 figs.; 2 tabs

[en] Spectral composition of two-quantum cascades, terminating by five low-lying ¹⁵⁶Gd levels is measured. Their total intensity makes up 31.9 (23)% of decays. Among 188 most intensive cascades, 78 are located in the decay scheme without using the conventional algorithms of constructing γ-schemes. 8 refs., 4 figs., 3 tabs

[en] The distribution of (intermediate) levels of energy values of the most intensite two-quantum cascades, binding compound-states (neutron resonances) and low-lying levels of certain nuclei in the range of 4s-resonance of neutron strength function 143≤A≤187, was analyzed. Triplets of very intensive cascades are singled out, the distance between intermediate levels of which is practically constant and changes monotonously in the function of atomic weight A. 26 refs.; 8 figs.; 1 tab