By the methods of modern physical materials science change in structural-phase state AlCoCrFeNi high-entropy alloy (HEA) nonequiatomic composition obtained by wire arc additive technology (WAAM) after irradiation electron beams with energy density 10-30 J/cm 2 , durality 50 μs, frequency 0.3 s -1 is studied. In initial had a dendritic structure indicating inhomogeneous distribution elements. It...

Ultrafast electron diffraction is a powerful technique to investigate out-of-equilibrium atomic dynamics in solids with high temporal resolution. When diffraction is performed in reflection geometry, the main limitation is the mismatch in group velocity between the overlapping pump light and the electron probe pulses, which affects the overall temporal resolution of the experiment. A solution a...

modification of the mechanical properties of silicone rubber were considered for drug delivery systems by using high-energy electron beam (e-beam). in this research work, two different medical grades of silicone rubbers were used to prepare matrices containing 10wt% progesterone with 2 mm thickness and irradiated with e-beam at dose range of 25 up to 200 kgy. then, the mechanical properties as ...

We study the luminescence decay times of Ce3+: Lu2SiO5 scintillator, co-doped with Sc3+ and Li+ ions, under direct photoexcitation Ce3+ ions at 337 nm excitation by a pulsed electron beam energies 100 – 300 keV. The cathodoluminescence (CL) photoluminescence (PL) studied sample are equal within experimental error. Two emission bands found: in range 370 480 (“high-energy band”) 500 570 (“low-ene...

In laser multiphoton electron extraction spectroscopy (MEES), the photo-charges extracted from a surface by pulsed beam are recorded as function of wavelength. We report first application this to banknotes. Various banknotes different countries, authentic and counterfeit, have been tested. The results indicate that MEES spectra both informative (many peaks) reproducible. allow for clear distinc...

For the operation of its mid-infrared FEL the superconducting electron accelerator S-DALINAC has to produce bunches with a charge of 6 pC and a duration of 2 ps FWHM. In order to achieve these figures a subharmonic injection scheme was added to the 3 GHz cw accelerator. The electron gun consists of a grid controlled thermionic cathode on a 250 kV terminal. It produces electron pulses with a cha...