Role of the Nuclear and Electromagnetic Interactions in the Coherent Dissociation of the Relativistic 7^7Li Nucleus into the 3^3H + 4^4He Channel

The differential cross section in the transverse momentum $Q$ and a total cross section of $(31\pm4)$ mb for the coherent dissociation of a 3-A-GeV/$c$ $^7$Li nucleus through the $^3$H$+^4$He channel have been measured on emulsion nuclei. The observed $Q$ dependence of the cross section is explained by the predominant supposition of the nuclear diffraction patterns on light (C, N, O) and heavy (Br, Ag) emulsion nuclei. The contributions to the cross section from nuclear diffraction ($Q\le400$ MeV/$c$) and Coulomb $(Q\le50$ MeV/$c$) dissociations are calculated to be 40.7 and 4 mb, respectively.Comment: ISSN 0021-3640, Pleiades Publishing, Ltd., 200

Constraints to Coupling Constants of the Omega- and Sigma-Mesons with Dibaryons

The effect of narrow dibaryon resonances to nuclear matter and structure of neutron stars is investigated in the mean-field theory (MFT) and in the relativistic Hartree approximation (RHA). The existence of massive neutron stars imposes constraints to the coupling constants of the omega- and sigma-mesons with dibaryons. We conclude that the experimental candidates to dibaryons d1(1920) and d'(2060) if exist form in nuclear matter a Bose condensate stable against compression. This proves stability of the ground state for nuclear matter with a Bose condensate of the light dibaryons.Comment: 10 pages, 6 figure

Comparative Analysis of Mortality from Infectious Diseases in the Russian Federation and Some European Countries

The purpose. To conduct comparative evaluation of mortality from infectious diseases and medical care quality in Russia and some European countries in different age groups. Materials and methods. Selection of mortality data was performed from various Russian and foreign databases. Ranking of countries according to mortality rates was done with a quartiles calculation method. For evaluating the adherence to preventive measures surveys of different population groups, to assess adherence to the principles of clinical epidemiology and evidence-based medicine was conducted a continuous survey of doctors, one branch of the municipal polyclinic of Moscow. The results and discussion. It is shown that the situation in the Russian Federation as a whole can be assessed as disadvantaged in mortality from infectious diseases in all age groups. Conclusions. A reduction in mortality among children as well as working-age population requires a comprehensive approach that should include both of improvement of quality of care and the formation of commitment to preventive measures