[en] Short note. 8 refs

[en] Polarizations of nucleons in decay of ⁵He_Λ → ⁴He+p+π^-, ⁴H_Λ → ³H+p+π^- and ⁴H_Λ → ³He+n+π^- hypernuclei are considered. The effect of strong final state interaction is taken into account. The considerable role of resonance interaction in the p-⁴He system when forming proton polarization in ⁵He_Λ decay is predicted. In ⁴H_Λ → ³H+p+π^- decay the components of proton polarization are also shown to reach considerable values, whereas in charge-exchange ⁴H_Λ → ³He+n+π^- decay of neutron polarizartion is expected tobe small

[en] New properties of isomultiplets are found making use of the theory of complex values of the Coulomb coupling constant. In particular, the following rule is formulated: the energies of decay or separation of the isomultiplet terms into a charged cluster and terms of the corresponding daughter isomultiplet are equidistant. This rule is well fulfilled for isomultiplets with A ≤ 60. Extrapolating these equidistance rules to heavy nuclei the excitation energies E_x of double isobar analogue states are found for the nuclei ^197,199Hg, ²⁰⁵Pb, ^205-209Po, ²⁰⁹At and ²³⁸Pu. Comparison of the calculated E_x value with the experimental one for the ²⁰⁸Po nucleus shows that the suggested method is reliable and well correct

[en] A model of the second-order phase transition is developed for determination of the lifetime of quasistationary states of hadronic systems. The model is based on a high-presicion description of the wave function in the inner domain of the configurational space. The level widths of quasistationary states of various systems are calculated and compared with experimental data

No abstract available

[en] Spectra of low energy conversion electrons emitted in the decay of ⁵⁷Co, ¹⁶⁹Yb and ²⁰¹Tl were analysed on a combined electrostatic spectrometer. High energy part of the measured conversion lines was approximated by folding a Lorentz distribution (FWHM=Γ) with a Gaussian one (FWHM=R) describing an instrumental line shape. The value of R was determined from the evaluation of the K-14.4 keV conversion line of ⁵⁷Fe where the value of Γ is well known. R=4.9 eV and R=6.8 eV have been obtained at different operational conditions of the spectrometer. The values of natural widths of Tm atomic levels obtained from measurements Γ(K)=35.5(3) eV, Γ(L₁)=4.4(3) eV, Γ(L₂)=4.0(4) eV, Γ(L₃)=4.0(5) eV, Γ(M₁)=13.9(3) eV, Γ(M₂)=9.2(8) eV, Γ(M₃)=9.5(12) eV are in good agreement with both the results of X-ray measurements and the semiempirical data

[en] The radiation fields of alpha-sources of different configurations are studied. Results for the alpha-fields of a point, linear, disc and thick plane source in vacuum or in material medium are presented. The intensity of the radiation in a fixed space point is defined either by the number of alpha-particles passing through the unit area around this point per unit time, or by the energy brought by the alpha-particles in this point per unit time. Analytical formulae allowing reasonable accuracy of estimated calculations for the needs of practice are presented. In the case of evaluating the number of particles the accuracy is higher than 4%

[en] The main results of the analytical superasymmetric fission model, describing in a unified manner cluster radioactivities, alpha-decay and cold fission processes, are briefly reviewed. Predicted halflives for ¹⁴C, ^24,25,26Ne, ^28,30Mg and ³²Si radioactivities in the range 10¹¹-10²⁶ s and the corresponding branching ratios relative to α-decay 10^-16-10^-9 have been experimentally confirmed within 1.5 orders of magnitude. (orig.)

[en] The absolute lifetimes of the four decay modes of /sup 234/U, namely α, Ne, and Mg decay, and spontaneous fission, are calculated within the superfluid tunneling model. It is found that a number of particles, of the order of twice the reduced mass of the two residual nuclei are moved around in the different processes. These particles belong to the condensed phase of the system and display, in their coherent motion, an inertia that is controlled by the pairing gap of the system, as well as by the number of nucleons participating. The model gives an overall account of the data, reproducing the observed lifetimes within two to three orders of magnitude

[en] Explicite expressions for the overlap integrals corresponding to C-12, C-14 and O-16 emission in the independent particle model with harmonic oscillator selfconsistent field are obtained. (authors)