Recent advances in imaging techniques and position-sensitive -y-ray detectors have made feasible hard x-ray and -y-ray telescopes with arc-second resolution [ 1]. Above an energy of 100 keY, past instrumentation has been limited to a typical angular resolution of a few degrees. A -y-ray imaging device with 1 arc-second resolution would be a dramatic improvement over conventional, non-imaging in...

ZnFe2O4 mixed spinel ferrite nanoparticles obtained through a citrate-nitrate combustion method. Ignited products calcined at different temperatures in 600-900ºC range and effect of calcination treatment temperature investigated. Final Products characterized by X-ray Diffraction (XRD), Fourier-Transform Infrared spectroscopy (FTIR), and Field Emission Scanning Electron Microscopy (FESEM). The a...

In this work La0.7Sr0.3MnO3 , one group of nanosized perovskite-type oxides were prepared by sol-gel method. The perovskite structure has been characterized by X-ray diffraction (XRD) , scanning electron microscopy (SEM) , energy dispersive X-ray spectrometer (EDX) and Fourier transform infrared (FTIR) . The nanoparticles showed the excellent adsorption properties towards reactive blue 4 (RB4) ...