Hyperfine anomaly in Be isotopes in the cluster model and the neutron spatial distribution

The study of the hyperfine anomaly of neutron rich nuclei, in particular, neutron halo nuclei, can give a very specific and unique way to measure their neutron distribution and confirm a halo structure. The hyperfine structure anomaly in Be+ ions is calculated with a realistic electronic wave function, obtained as a solution of the Dirac equation. In the calculations, the Coulomb potential modified by the charge distribution of the clustered nucleus and three electrons in the 1s^2 2s configuration is used. The nuclear wave function is obtained in the core+nucleon model of 9,11Be. The aim of this study is to test whether the hyperfine structure anomaly reflects a halo structure in 11Be.Comment: 8 pages, 1 figur

Possibility to study a two-proton halo in 17^{17}Ne

The nuclide $^{17}$Ne is studied theoretically in a three-body $^{15}$O+$p$+$p$ model. We demonstrate that the experimental condition for existence of a proton halo in $^{17}$Ne can be reasonably quantified in terms of $s/d$ configuration mixing. We discuss experimental evidences for a proton halo in $^{17}$Ne. We define which kind of experimental data could elucidate this issue.Comment: 5 pages, 5 figure

Theoretical study of one-proton removal from 15O

One-proton removal from 15O at intermediate energies (56 A MeV) is studied in the eikonal approximation of the Glauber model. The production of the 14N core fragment in the ground and excited states is regarded. The calculated proton removal cross section, the 15O interaction cross section, and the longitudinal momentum distribution of the 14N fragments are compared to recent experimental data [1]. [1] H. Jeppesen, R. Kanungo, B. Abu-Ibrahim it et al, Nucl. Phys. A 739, 57 (2004)

From Coulomb excitation cross sections to non-resonant astrophysical rates in three-body systems: 17^{17}Ne case

Coulomb and nuclear dissociation of $^{17}$Ne on light and heavy targets are studied theoretically. The dipole E1 strength function is determined in a broad energy range including energies of astrophysical interest. Dependence of the strength function on different parameters of the $^{17}$Ne ground state structure and continuum dynamics is analyzed in a three-body model. The discovered dependence plays an important role for studies of the strength functions for the three-body E1 dissociation and radiative capture. The constraints on the $[s^2]/[d^2]$ configuration mixing in $^{17}$Ne and on $p$-wave interaction in the $^{15}$O+$p$ channel are imposed based on experimental data for $^{17}$Ne Coulomb dissociation on heavy target.Comment: 12 pages, 13 figure

Modern technical solutions of foreign battery mould

Review of foreign battery mould production Weckenmann (Germany), EBAWE (Germany), Elematic (Finland) is made in the article. It is noted that the use of optimized designs of battery form allows you to get inside the wall panels with precise geometric dimensions, the required category of the concrete surface, which does not require additional processing on the construction site

Sulfate corrosion of concrete caused by thionic bacteria

The article deals with conditions for the occurrence of sulfate corrosion of concrete. It is noted that thionic bacteria, changing pH of the medium at the expense of formed sulfuric acid, are active corrosion agents. The activity of thionic bacteria leads to concrete corrosion of the second and the third type. It is shown that the intensity of biocorrosion destruction is determined by the rate of chemical reactions and microorganisms and internal diffusion of metabolic products in the concrete structure is determined by the rate of chemical reactions and internal diffusion microorganisms and products of their metabolism in the concrete structure. The article presents modern methods of protection from sulfate corrosion

Effective Modifiers of Gypsum Binders Substances

A brief analytical review of the modifiers of gypsum binders is given. It is shown that the modification of gypsum binders enhances the physical and mechanical characteristics: strength, water resistance. It is possible to use as modifiers: sludge of water treatment of Novopolotsk HES, cinder of «Belorusskaya GRES», fiberglass of JSC «Polotsk-Steklovolokno»

Modern technical solutions of foreign battery mould

Review of foreign battery mould production Weckenmann (Germany), EBAWE (Germany), Elematic (Finland) is made in the article. It is noted that the use of optimized designs of battery form allows you to get inside the wall panels with precise geometric dimensions, the required category of the concrete surface, which does not require additional processing on the construction site