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[en] The results of the developing the library of uncertainties of radioactive decay data in the ABBN data library format are described. Different evaluations of uncertainties were compared and their effects on the results of calculations of residual energy release were determined using the test problems and experiment. Tables were generated in the ABBN format with the data obtained on the basis of libraries in ENDF-6 format. 3821 isotopes from the ENDF/B-7 data library, 3852 isotopes from the JEFF-3.11 data library and 1264 isotopes from the JENDL-4.0 data library were processed. It was revealed that the differences in the evaluations accepted in different decay data libraries are not so big, although they sometimes exceed the uncertainties assigned to the data in the ENDF/B-7 and JEFF-3.11 libraries, which as a rule, they agree with each other. On the basis of developed method it is supposed to create a library of data uncertainties for radioactive decay within the constant data system in FSUE RFNC-VNIIEF with its further connection with CRYSTAL module. (paper)

[en] Recently, it has been predicted that hydrogen-boron (p-¹¹B) nuclear fusion may attain ignition in the hot spots observed in a plasma focus (PF) pinch, due to their huge values of particle density, magnetic field and (reportedly) ion temperature. Accordingly, large magnetic fields should raise electronic Landau levels, thus reducing collisional exchange of energy from ion to electrons and Bremsstrahlung losses. Moreover, large particle densities, together with ion viscous heating, should allow fulfilment of Lawson criterion and provide effective screening of cyclotron radiation. We invoke both well-known, empirical scaling laws of PF physics, Connor-Taylor scaling laws, Poynting balance of electromagnetic energy and the balance of generalised helicity. We show that the evolution of PF hot spots is a succession of relaxed states, described by the double Beltrami solutions of Hall-MHD equations of motion. We obtain some necessary conditions for ignition, which are violated in most realistic conditions. Large electromagnetic fields in the hot spot accelerate electrons at supersonic velocities and trigger turbulence, which raises electric resistivity and Joule heating, thus spoiling further compression. Ignition is only possible if a significant fraction of the Bremsstrahlung-radiated power is reflected back into the plasma. Injection of angular momentum decreases the required reflection coefficient. (author)

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[en] A isotopic separation pilot plant with five ion exchange columns interconnected in series were designed and built in the IEN. The columns are charged with a strong anionic resin in its alkaline form. The boric acid solution is introduced in the separation columns until it reaches a absorbing zone length which is sufficient to obtain the desired boron-10 isotopic concentration. The boric acid absorbing zone movement is provided by the injection of a diluted hydrochloric acid solution, which replace the boric acid throughout the columns. The absorbing zone equilibrium length is proportional to its total length. The enriched boron-10 and the depleted boron are located in the final boundary and in the initial position of the absorbing zones, respectively. (author)

[en] A new model-independent method for determining the parity of a state as either π= (-)/subJ/ or π= (-)/subJ/⁺¹ in odd-odd nuclei is described. The technique requires a polarized deuteron beam to initiate a (d, α) reaction on an even-even target with detection of the reaction products near 0degree or 180degree. The method is demonstrated using the reaction ¹²C(d, α)¹⁰B

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[en] Application of the deposition method based on the vibrational motion of micro particles in an electrostatic field [I. Sugai, Nucl. Instr. and Meth. A 397 (1997) 81] is described for the production of isotopic ¹¹B foils. The method proved suitable for target production of this typically brittle material when a very flat target surface was required. The goal to produce ¹¹B targets of 160-350 μg/cm² was achieved by depositing the boron on a thin foil substrate, such as Nb and Sn. The coated foil was stretched flat before it was mounted on a frame

No abstract available