[en] It is shown by analysis of nucleon and nucleon pair separation energies S_n, S_p, S_2n, S_2p in odd-odd nuclei that odd shells are observed at Z,N=7,11,15,19,23 as a result of coherently enhanced shell closure. The Z,N=11 and 23 shells are most probably deformed. The Z,N=7,15 shells are similar to the shells with the same magic numbers in atoms and thus must be spherical. There were also established the shell closures for even-even nuclei (N=Z) at Z=14 and N=24. (author). 16 refs., 4 figs

[en] The analysis of the reduced mixing ratio δ(E2/M1), was performed for the transitions between states of the definite nature in odd even-even nuclei. 5 refs.; 1 tab

[en] It is shown by analysis of nucleon and nucleon pair separation energies S_n, S_p, S_2n, S_2p in odd-odd light nuclei that odd shells are observed at Z, N = 7, 11, 15, 19, 23 as a result of coherently enhanced shell closure. The Z, N = 11 and 23 shells are most probably deformed. The Z, N = 7 and 15 shells are similar to shells with the same magic numbers in atoms and thus must be spherical. (author). 16 refs.; 2 figs

[en] The analysis of the reduced multipole mixing ratio δ(E2/M1)E_γ was performed for l-forbidden M1-transitions. It was shown that these parameters have minimum in their absolute value at the shell or subshell closure in nuclei. It was also established by analysing the forbiddence factors F(M1) that the proton number Z=15 is the magic one, as the neutron number N=15. 12 refs.; 3 figs.; 4 tabs

[en] The effect of the interelectrode potential difference in the XP2020 photomultiplier on the intensity of formation of afterpulses caused by ion feedback is studied. It is shown that the photocathode - first dynode gap plays a decisive role in this process while the dynode system is of minor importance at pulse currents below a few tens of milliampers. It is also shown that the anomalous ratio between the afterpulse amplitudes and basic pulse amplitudes can be governed by the process of single ion detection. (author)

[en] An anti-Compton γ-spectra formation method is considered. The method is based on quasi differentiation of experimental γ spectra with regard for the γ-line width. It can be used for precise determination of energies of single γ lines and for processing of the data at activation analysis. (author)

[en] Two-detector single-crystal scintillation autocorrelation spectrometer with rejection of afterpulses is developed. Rejection of afterpulses is realised by the delayed coincidence method. (author)

[en] It is shown by the analysis of ¹⁶⁵Tm decay that the precision measurements of γ-ray and internal conversion electron intensities together with the measurements o.f angular correlation coefficients provide more data for the determination of γ-ray multipole composition and intensities of γ-transitions with small enerqy difference. The spin of the 589.868 ke tate is found to be I=1/2^-. Doublet transitions of different parity from the states 1103.495, 920.645 and 745.968 keV to the levels of the 590 keV region with energy difference ΔE=(108+-22) eV are identified

[en] Short note. 2 figs

[en] The effect of the potential different at the focusing chamber electrodes of the FEU-85, FEU-87, and FEU-93 photomultipliers on the intensity of afterpulses resulting from gas discharge processes is investigated. With appropriately selected potentials, the number of recorded secondary pulses can be decreased. Charge distribution spectra are obtained for this sort of pulses, which gives a qualitative estimate of both the homogeneity of the charge and mass distribution of residual gases and the ion-electron emission coefficients