Search for a signal on intermediate baryon systems formation in hadron-nuclear and nuclear-nuclear interactions at high energies

We have analyzed the behavior of different characteristics of hadron-nuclear and nuclear-nuclear interactions as a function of centrality to get a signal on the formation of intermediate baryon systems. We observed that the data demonstrate the regime change and saturation. The angular distributions of slow particles exhibit some structure in the above mentioned reactions at low energy. We believe that the structure could be connected with the formation and decay of the percolation cluster. With increasing the mass of colliding nuclei, the structure starts to become weak and almost disappears ultimately. This shows that the number of secondary internuclear interactions increases with increasing the mass of the colliding nuclei. The latter could be a reason of the disintegration of any intermediate formations as well as clusters, which decrease their influence on the angular distribution of the emitted particles.Comment: 2 pages and one figur

Single - particle correlations in events with the total disintegration of nuclei

New experimental data on the behaviour of the single-particle two-dimensional correlation functions R versus Q (Q is the number of nucleons emitted from nuc- lei) and Ap (Ap is the mass of projectile nuclei) are presented in this paper. The interactions of protons, d, 4He and 12C nuclei with carbon nuclei (at a momentum of 4.2 A GeV/c) are considered.The values of R are obtained separately for pi minus mesons and protons.In so doing,the values of R are normalized so that -1=<R=<1.The value of R=0 corresponds to the case of the absence of corre- lations.It has been found that the Q- and Ap-dependence of R takes place only for weak correlations (R< 0.3).In the main (90 %),these correlations are con- nected with the variable pt and have a nonlinear character, that is the regi- ons with different characters of the Q-dependence of R are separated: there is a change of regimes in the Q-dependences of R.The correlations weaken with increasing Ap, and the variable R gets the least values of all the considered ones in 12CC interactions.Simultaneously with weakening the correlations in the region of large Q, the character of the Q-dependence of R changes.Comment: 17 pages, submitted to Phys. Rew.

Potential of Human Resources of the Region as a Driver of Future Economy Growth

This article examines the importance and role of human resources in the regional economy.В данной статье рассматривается значимость и роль кадрового потенциала в экономике региона. Приводится понятийно-терминологический аппарат кадрового потенциала. В конце данной статьи представлены основные задачи, которые необходимо выполнить для достижения цели развития кадрового потенциала

Some Properties of the Central pi--Meson Carbon Interactions at 40 Gev/C

We discuss some properties of the central pi--meson carbon reactions at 40 GeV/c. While these results were obtained many years ago they have not been explained completely. We attempt to interpret following: results regime change on the behavior of some characteristics of the events as a function of the centrality; anomaly peak on the angular distributions of the slow protons emitted in these reactions; charge asymmetry on the pi--mesons production in the back hemisphere in lcs. Understanding of the results could help to explain the new ones coming from the modern central experiments at high and ultrarelativistic energies.Comment: To appear in the proceedings of the 10th nternational Workshop on Meson Production, Properties and Interaction (MESON 2008), Krakow, Poland, 6 - 10 June 2008. 4 pages and 4 figure

ОСОБЕННОСТИ ВЫРАЩИВАНИЯ НИЗКОДИСЛОКАЦИОННЫХ КРИСТАЛЛОВ ГЕРМАНИЯ БОЛЬШОГО ДИАМЕТРА МЕТОДОМ ЧОХРАЛЬСКОГО

Cz growth of large diameter Ge single crystals has been studied. The crystals have been grown from the melt with various shapes of the crystallization front. The formation of dislocation low angle boundaries (LAB) has been analyzed. We have analyzed the formation of LAB in the as−grown Ge crystals taking into account the actual distribution of thermal tension in the crystal in the presence of radial and axial heat sinks. The behavior LAB−forming dislocations in the thermal tension field has been considered. We have analyzed the migration of these dislocations in the sliding planes and specified possible dislocation aggregation planes. The best results have been obtained for crystals in which the crystallization front was slightly concave towards the crystal. Thus, we have observed a uniform distribution of dislocations. As a result of the analysis we have determined the thermal conditions for growth of LAB free ingots. Experiments confirmed the compliance of model representations with real crystal growth conditions, and we have obtained Ge single crystals with a diameter of100 mmand more, with a low dislocations density and free from LAB.Изучены процессы роста легированных монокристаллов германия большого диаметра, выращенных методом Чохральского из расплава с различной формой фронта кристаллизации (ФК). Проанализировано формирование дислокационных малоугловых границ (МУГ). Проведен анализ формирования МУГ в выращенных кристаллах германия с учетом реального распределения термических напряжений в кристалле при наличии как радиального, так и осевого теплоотвода. Рассмотрено поведение в поле термических напряжений дислокаций, из которых формировались МУГ. Проведен анализ движения этих дислокаций в плоскостях скольжения и выделены плоскости возможного скопления дислокаций. Наилучшие результаты достигнуты при выращивании кристаллов со слабовогнутым в кристалл ФК. Обнаружено однородное распределение дислокаций. В результате анализа выявлены тепловые условия получения слитков, свободных от МУГ. Проведены эксперименты, в результате которых подтверждено соответствие модельных представлений реальным условиям роста кристаллов и получены монокристаллы германия диаметром100 мми более с низкой плотностью дислокаций, свободные от МУГ