Compact magneto-optical sources of slow atoms

Three different configurations of compact magneto-optical sources of slow Rb atoms(LVIS, 2D(+)-MOT and 2D-MOT) were compared with each other at fixed geometry of cooling laser beams. A precise control of the intensity balances between the four separate transverse cooling laser beams provided a total continuous flux of cold atoms from the LVIS and 2D(+)-MOT sources about 8x10^9 atoms/s at total laser power of 60 mW. The flux was measured directly from the loading rate of a 3D-MOT, placed 34 cm downstream from the sources. Average velocities of the cooled atomic beam for the LVIS and 2D(+)-MOT sources were about 8.5 m/s and 11 m/s respectively. An essential advantage of the compact magneto-optical sources is that their background flux of thermal atoms is two to three orders of the magnitude smaller than the flux of slow atoms.Comment: 12 pages, 10 figures. to be published in Optics Communication

Biochemical characterization of glucosaminylmuramyldipeptide binding sites of murine macrophages

AbstractBy using radioligand analysis, murine peritoneal macrophages were shown to express several hundred high-affinity cell surface GMDP-binding sites (Ka 350 pM). Photoaffinity labeling followed by SDS-PAGE enabled us to identify 32–34 and 38 kDa proteins inside these cells that bound GMDP specifically

The use of economic-mathematical methods and models in the process of making management decisions

The article proves the relevance of the application of methods of decision-making on the basis of economic-mathematical modeling. It is shown, that application of economic and mathematical methods allows to considerably enhance the quality of strategic, tactical and current planning, to receive the additional effect without the involvement in the process of additional resource

О некоторых подходах к информационной подготовке и переподготовке (повышению квалификации) управленческих кадров

The choice of the direction of modernization of a national economics of Russia will define its place in world economic system. The problem of increasing the level of knowledge and qualification of teachers and employees of higher educational institutions in the field of IT-technology is actual. It is necessary to create a network of the multipurpose centers of providing educational services in a principle of «one window» for citizens just as it is realized within the creation of the electronic governmen

Ultralow-power local laser control of the dimer density in alkali-metal vapors through photodesorption

Ultralow-power diode-laser radiation is employed to induce photodesorption of cesium from a partially transparent thin-film cesium adsorbate on a solid surface. Using resonant Raman spectroscopy, we demonstrate that this photodesorption process enables an accurate local optical control of the density of dimer molecules in alkali-metal vapors.Comment: 4 pages, 4 figure

Tetra­carbonyl-1κ2 C,3κ2 C-bis[1,3(η5)-cyclo­penta­dien­yl]dihydroxido-2κ2 O-diirontin(2 Fe—Sn) monohydrate

In the title hydrate, [Fe2Sn(C5H5)2(OH)2(CO)4]·H2O, the central Sn atom is tetra­hedrally coordinated by two {Cp(CO)2Fe} fragments and two hydroxide groups. The [{Cp(CO)2Fe}2Sn(OH)2] and water mol­ecules are linked by O—H⋯O hydrogen bridges, giving two-dimensional arrays with 4.82 topology that stack along the c axis

Group velocity control in the ultraviolet domain via interacting dark-state resonances

The propagation of a weak probe field in a laser-driven four-level atomic system is investigated. We choose mercury as our model system, where the probe transition is in the ultraviolet region. A high-resolution peak appears in the optical spectra due to the presence of interacting dark resonances. We show that this narrow peak leads to superluminal light propagation with strong absorption, and thus by itself is only of limited interest. But if in addition a weak incoherent pump field is applied to the probe transition, then the peak structure can be changed such that both sub- and superluminal light propagation or a negative group velocity can be achieved without absorption, controlled by the incoherent pumping strength

μ3-Oxido-tris­{dichlorido[1,3-bis­(1,3,5-trimethyl­phen­yl)imidazol-2-yl­idene]gold(III)} bis­(trifluoro­methane­sulfon­yl)imide–[bis­(trifluoro­methane­sulfon­yl)imide]­silver(I) (1/2)

The unusual trinuclear AuIII oxide title complex, [Au3Cl6O(C21H24N2)3](C2F6NO4S2)·2[Ag(C2F6NO4S2)], is the side product of the reaction of [1,3-bis­(1,3,5-trimethyl­phen­yl)imidazol-2-yl­idene]dichloridophenyl­gold(III) with silver bis­(trifluoro­methane­sulfon­yl)imide in the presence of traces of water. In contrast to corresponding AuI complexes, the core structure of the title compound is planar. Two silver(I) bis­(trifluoro­methane­sulfon­yl)imide units are loosely bound to the complex cation. Here the silver atoms, disordered over two positions in a 0.870 (2):0.130 (2) ratio, inter­act either with the lone pairs of three chlorine ligands or two chlorine ligands and one edge of the mesityl π-system. The crystal under investigation was a partial racemic twin

Specific Absorption Rate of Assembly of Magnetite Nanoparticles with Cubic Magnetic Anisotropy

The presence of strong magnetic dipole interaction in assemblies of fractal clusters of nearly spherical magnetite nanoparticles, which arise in a biological media loaded with magnetic nanoparticles, leads to a significant decrease of the specific absorption rate of these assemblies in alternating magnetic field. However, the specific absorption rate of the assembly can be increased if the nanoparticles are covered by non magnetic shells of sufficiently large thickness comparable with the nanoparticle diameter. Keywords: Magnetite nanoparticles, Magneto- dipole interaction, Specific absorption rate, Numerical simulatio