High-definition patterns were observed under 10-Hz-pulse-repetition-rate, nanosecond laser irradiation of azodye-doped planar-nematic liquid crystal layers at incident intensities I 5–10 MW=cm in a single beam configuration and without any feedback involved. An incident polarization parallel to the nematic director was used. Under periodic pulsed laser irradiation, far-field beam patterns at th...

Laser-generated electron beams are distinguished from conventional accelerated particles by ultrashort beam pulses in the femtoseconds to picoseconds duration range, and their application may elucidate primary radiobiological effects. The aim of the present study was to determine the dose-rate effect of laser-generated ultrashort pulses of 4 MeV electron beam radiation on DNA damage and repair ...

During particle therapy irradiation, positron emitters with half-lives ranging from 2 to 20 min are generated from nuclear processes. The half-lives are such that it is possible either to detect the positron signal in the treatment room using an in-beam positron emission tomography (PET) system, right after the irradiation, or to quickly transfer the patient to a close PET/CT scanner. Since the...

The efficiency of nonequilibrium electron trapping by capture centers in alkali halide crystals, quartz, and polymethyl-methacrylate exposed to an intense electron beam with a beam current density of about 20 A/cm 2 is studied. The trapped charge is estimated from the amount of irradiation-induced electrification of high-resistivity materials. It is shown that traps having captured thermalized ...

Single-crystal Cu nanorods have been fabricated on carbon films by manipulating electron beam irradiation on a Cu powder charge in a transmission electron microscope (TEM). By adjusting the intensity of the electron beam, we observed lively nucleation and growth of the Cu nanorods with the TEM. Individual Cu nanorods are straight with diameters ranging from 40 to 50 nm. The length of the rods i...

Ion beam irradiation-induced nanoporous structure formation was investigated on GaSb, InSb, and Ge surfaces via controlled point defect creation using a focused ion beam (FIB). ‎This paper compares the nanoporous structure formation under the same extent of point defect creation while changing the accelerating voltage and ion dose. Although the same number of point defects were created in each ...

The traditional experimental method for new materials radiation resistance investigation is a reactor irradiation. However, there are some difficulties during steel exposure in reactor. Simulationmethod based on ion irradiation allows accelerating the defect generation in the material under investigation. Also a modification of materials by ion beams represents the great practical interest for ...

BACKGROUND Esophageal cancer has emerged as a major health challenge in many regions of the world, including the valley of Kashmir, which is situated adjacent to the esophageal cancer belt on its Southern side. Radiotherapy is one of the main modalities of treatment. However, residual/recurrent disease is common and salvage options for these patients are limited. Scarce literature is available ...

Murals are a significant cultural heritage of humanity, and one the conservation studies is to control growth microorganisms. General biocide agents can be used preserve murals while also providing new organic carbon sources increasing environmental pollution. In recent years, radiation technology has shown promising prospects for use in protection. Five microorganisms often found were irradiat...

The paper presented the experimental results regarding the use of the cellulose triacetate (CTA) to determine the homogeneity degree of the irradiation field obtained in accelerated electron beam by scattering through aluminum foils and to evaluate absorbed dose into the material depth. The results indicated a reduced irradiation surface for thin scattering foil (0.1 mm). Both using thicker sca...