The numerical simulation of the development a streamer discharge in gap with an external longitudinal magnetic field was used to demonstrate self-focusing such discharges. Self-focusing is caused by sharp deceleration radial ionization wave due change electron energy distribution function, decrease average energy, rate gas ionization, and mobility crossed electric fields as compared case withou...

We present a complex-scaling generalized pseudospectral method for accurate and efficient treatment of resonance states in two-center molecular systems, involving optimal nonuniform grid discretization of the Hamiltonian in prolate spheroidal coordinates. The procedure is applied to the first converged non-Hermitian Floquet study of multiphoton ionization of molecular ions in intense low-freque...

Please cite this article in press as: Novikov YN e fect. Microelectron Reliab (2009), doi:10.1016/j The charge transport mechanism in amorphous alumina, Al2O3, is investigated both theoretically and experimentally. We found that the experimental current–field–temperature dependencies can hardly be understood based on the commonly used Frenkel effect or the thermally-assisted tunneling model. In...

It was recently shown that the exact factorization of the electron-nuclear wave function allows the construction of a Schrödinger equation for the electronic system, in which the potential contains exactly the effect of coupling to the nuclear degrees of freedom and any external fields. Here we study the exact potential acting on the electron in charge-resonance enhanced ionization in a model o...

We have observed resonant phenomena in the intense-field ionization of argon that do not easily fit into the standard models of above-threshold ionization. High-resolution angleresolved measurements of the energy region around 6–10 times the ponderomotive potential UP in the ATI electron spectrum show at least three separate series of peaks, each with a distinct intensity threshold for their on...

Introduction: Due to its simplicity, fast response and high reliability, ion chamber detectors are one of the most suitable dosimetry instruments for X and gamma rays. The dosimeter    of photon beams, which used in radiotherapy centers, requires high accuracy and should pass requirements of IEC 60731 standards. About 80 percent of the IEC 60731 standard tests such as stabil...

RATIONALE With the current state-of-the-art detection of ions only taking place under vacuum conditions, active pixel detectors that operate under ambient conditions are of particular interest. These detectors are ideally suited to study and characterize the charge distributions generated by ambient ionization sources. METHODS The direct imaging capabilities of the active pixel detector are u...

Most of the benefic effects of negative air ions (NAI) quoted in the literature until the end of the 20 century were obtained with high doses of NAI, but at these doses a phased action was noted: favorable at the beginning, then unfavorable on extended exposures. In Romania, experimental studies on animal or human subjects were made mostly with moderate doses of air ions, close to those in the ...

This work presents density, spectroscopic temperature, and shockwave measurements of laser induced breakdown plasma in atmospheric air by subthreshold intensity 5.5 109 W /cm2 193 nm laser radiation. Using molecular spectroscopy and two-wavelength interferometry, it is shown that substantial ionization 1016 cm−3 occurs that is not predicted by collisional cascade CC breakdown theory. While the ...

Laser desorption/ionization techniques were firstly developed in the early seventieth years [1] but only in the late eighteenth [2, 3], with the introduction of matrix-assisted laser desorption/ionization, they became an established method for the mass spectrometry of macromolecular compounds. The role of matrix is to absorb UV laser radiation and to give the energy to the analyte, often not ab...