The Oriented Scintillation Spectrometer Experiment (OSSE) on board the COMPTON Gamma Ray Observatory observed the 1991 June 4 X12+ solar are, one of the most intense nuclear gamma-ray line ares observed to date. Using these OSSE observations, we have derived time prooles of the various components of gamma-ray emission and obtained information about the accelerated particle spectra and compositi...

this study examines the effects of change in the concentrations of monovalent and divalent ions in the polymer-contained surfactant solution on the macroscopic behavior of viscous-modified surfactant waterflooding in heavy oil reservoirs. salts that are used in this set of floods were sodium chloride, magnesium chloride, and calcium chloride. the results indicate that four different ranges of s...

We have surveyed the 0.1–10 MeV nucleon 1 abundances of heavy ions from He through Fe in 64 large solar energetic particle (LSEP) events observed on board theAdvancedComposition Explorer from1997November through 2005 January. Our main results are (1) the 0.5–2.0MeV nucleon 1 He/He ratio is enhanced between factors of 2– 150 over the solar wind value in 29 ( 46%) events. (2) The Fe/O ratio in mo...

in present study, molecular dynamics simulation of cadmium (ii), lead (ii) and copper (ii) removal from aqueous electrolyte solutions using the ion-exchange process with the zeolite particles was done. the results showed that, most of the particles had the highest affinity of ion exchanging with lead (ii) and the lowest affinity with copper (ii). the calculated mean ion-exchange ratios showed t...

co-precipitation procedure was applied in order to obtain different kinds of magnetic nanoadsobents for the removal of pb(ii) and cu(ii) toxic metal ions from wastewater samples. prepared nanoadsorbents were characterized by fourier transform infrared spectroscopy (ft-ir), x-ray diffractometer (xrd), scanning electron microscopy (sem) and thermogravimetric analysis (tga). the average sizes of t...

Ion beams from cyclotrons as a source of radiation with extremely high linear energy transfer (LET) are considered. Basic processes of energy dissipation in heavy ion tracks are reviewed and the main parameters characterizing the effects of accelerated heavy ions on matter are given in relation to the effects of low-LET radiation. Modification of polymers by using cyclotron beams is discussed w...

Most astronauts on Apollo, Skylab, and MIR reported 'flashes of light' occurring in different shapes and apparently moving across the visual field, in the absence of auditory, somatosensory, or olfactory abnormal percepts. A temporal correlation with heavy nuclei or protons has been documented in space and comparable phosphenes were observed by volunteers whose eyes were exposed to accelerated ...

Abstract A process specific to the dynamics of heavy impurities in turbulent tokamak plasmas is found and analyzed. We show that parallel stochastic acceleration strongly coupled perpendicular transport generates a radial pinch velocity. The interaction produced with hidden drifts, quasi-coherent component motion consists pair average velocities opposite directions. breaks this symmetry yields ...