It is shown that instanton induced interaction between quarks produces a very deeply bound H-dibaryon with mass below 2M N , M H = 1718 MeV. Therefore the H-dibaryon is predicted to be a stable particle. The reaction of photodisintegration of H-dibaryon to 2Λ in during of its penetration into cosmic microwave background will result in a new possible cutoff in the cosmic-ray spectrum. This provi...

The interaction between hexavalent chromium Cr(VI), as K(2)CrO(4), and standard humic acids (HAs) in bulk solution was studied using three complementary analytical methods: UV-Visible spectroscopy, X-ray absorption spectroscopy and differential pulse stripping voltammetry. The observed UV-Vis and X-ray absorption spectra showed that, under our experimental conditions, HAs did not induce reducti...

X-ray emission following charge exchange has been studied on the University of California Lawrence Livermore National Laboratory electron beam ion traps EBITI and EBIT-II using a high-resolution microcalorimeter. The measured spectra include the K-shell emission from hydrogenlike and heliumlike C, N, O, and Ne needed for simulations of cometary x-ray emission. A comparison of the spectra produc...

We briefly reviewed some recent progress on the studies of supernova remnants (SNRs), including the radio SNRs (the structure, polarization, spectrum etc.), observational characteristics of X-ray emission, pulsar wind nebulae (PWNe), association properties between SNR and PSR, interaction of SNR and interstellar medium (ISM), cosmos ray and the SNRs in external galaxies, etc.. Correspondingly t...

The knowledge of the total yield of X-ray radiation is essential for evaluation of a feature of produced plasma and for characterization of different X-ray sources constructed on the basis of plasma facilities. There are some difficulties encountered when dealing with measurements of high fluxes of X-rays from such great plasma facilities as a 1 kJ laser system PALS (Prague Asterix Laser System...

Ray tracing is a method for producing photorealistic 3D computer generated imagery by modeling the interaction of light rays with a scene. Because each primary ray is independent of other primary rays being modeled, ray tracing offers massive degrees of parallelism that is suitable to parallel architectures like GPUs, multicore CPUs, and distributed computing environments. Our goal is to implem...

We present an evolutionary model for γ-ray line emission from superbubbles based on shock acceleration of metal-rich stellar ejecta. Application to the Orion OB1 association shows that γ-ray lines at the detection threshold of the SPI spectrometer aboard of INTEGRAL are expected, making this region an interesting target for studies of the interaction of supernova shocks with the interstellar me...

Supernova remnants have long been suggested as a class of potential counterparts to unidentified γ-ray sources. The mechanisms by which such γ-rays can arise may include emission from a pulsar associated with a remnant, or a variety of processes associated with energetic particles accelerated by the SNR shock. Imaging and spectral observations in the X-ray band can be used to identify propertie...

We investigate the hydrodynamic interaction in suspensions of charged colloidal silica spheres. The volume fraction as well as the range of the electrostatic repulsion between the spheres is varied. Using a combination of dynamic x-ray scattering, cross-correlated dynamic light scattering, and small angle x-ray scattering, the hydrodynamic function H(q) is determined experimentally. The effecti...

This chapter presents the process of interaction of light, mainly in the xray range, with matter. The subject is introduced by some experimental evidences of x-ray absorption, emission or scattering by different kinds of material. The ways of describing the electromagnetic wave field are then briefly presented before developing its interaction with an electron in an atom. This process is then a...