947 research outputs found
Transformation of biotite into opal in the soils of northern Karelia
Mineralogical composition of northern Karelia soils, and biotite transformation into opa
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
Migration and investment activity in the regions of the Siberian Federal District of the Russian Federation
This article analyses the migration and investment activity processes in
constituent entities of the Russian Federation located in the Siberian Federal District
(SFD). The research was performed on the basis of official statistical data with
geographical visual reference. The study was performed in the mono-specialized cities of
SFD regions on the basis of official statistics within the context of the creation of Priority
Social and Economic Development Areas (PSEDA). A negative migration balance is
registered in SFD regions and mono-specialized settlements. Investment activity in SFD
territories, their regional potentials and risks were analyzed. Krasnoyarsk Territory, Tomsk
Region, Irkutsk Region, Novosibirsk Region, and Kemerovo Region stand out among the
SFD regions by their investment activity level and social and economic development. At the
current stage of social and economic development, Priority Social and Economic
Development Areas can be successfully created in the regions which are the most
developed both industrially and innovatively and in the mono-specialized settlements with
the most favorable start conditions
Pedagogical culture as one of the faces of organizational culture university
This article is about pedagogical culture as one of the faces of the organizational culture of the university. The components of pedagogical culture are considered in the article. Also in the article there is done the research of this question in three Novosibirsk universitiesВ статье рассматривается педагогическая культура как одна из граней организационной культуры вуза. Рассмотрены составляющие педагогической культуры. В качестве примера приводится исследование данного вопроса в трех вузах города Новосибирск
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)
Possibility to study a two-proton halo in Ne
The nuclide Ne is studied theoretically in a three-body
O++ model. We demonstrate that the experimental condition for
existence of a proton halo in Ne can be reasonably quantified in terms
of configuration mixing. We discuss experimental evidences for a proton
halo in Ne. We define which kind of experimental data could elucidate
this issue.Comment: 5 pages, 5 figure
The influence of some model parameters on the impurity distribution implanted into substrate surface
The model for description of the initial stage of ion implantation into the surface layer of the metal is presented. The interdependence of embedded impurity concentration and deformations arising from the impact of particles on the surface is investigated. The model takes into account the particle diffusion, the finite time of mass flux relaxation; the stress appearance due to a composition change of the surface layer and a mass transfer phenomenon under a stress gradient action. It is established that the interaction of mechanical waves and concentration leads to a distribution of concentration not corresponding to a pure diffusion process. The examples of coupled problems solution for different sets of model parameters are presented
The influence of vacancy generation at the initial stage of ion implantation
The paper presents a coupled isothermal model at the initial stage of a solid surface treatment with particle beams. Mechanical stresses arising due to the interaction of particles with the surface affect the redistribution of the implanted impurity. Vacancies in the metal surface and their generation under stress are also taken into account. The kinetic law is formulated on the basis of thermodynamics of irreversible processes. The authors used numerical investigation methods. As a result, they have obtained the distributions of impurity concentration and deformations for various time moments. The authors also compare the concentration and deformation profiles with and without vacancies and study the influences of some model parameters. The effect of vacancy generation on the diffusion has been established to lead to an increase in the depth of penetration, as well as in the concentration of impurities
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