Results 241 to 250 of about 31,277 (294)
Some of the next articles are maybe not open access.

Oxygen ionization rates at Mars and Venus: Relative contributions of impact ionization and charge exchange

Journal of Geophysical Research, 1993
Oxygen ion production rates above the ionopauses of Venus and Mars are calculated for photoionization, charge exchange, and solar wind electron impact ionization processes. The latter two require the use of the Spreiter and Stahara (1980) gas dynamic model to estimate magnetosheath velocities, densities, and temperatures.
M. H. G. Zhang   +4 more
exaly   +2 more sources

Cross sections of charge exchange and ionization in O8+ +H collision in Debye plasmas

Physics of Plasmas, 2012
Charge exchange and ionization processes in O8+ +H collision system in a Debye plasma are studied using the classical trajectory Monte Carlo (CTMC) method in the collision energy ranging from 1 keV/amu to 500 keV/amu. Total charge exchange and ionization cross sections have been determined in both screening and unscreening environments.
Ho Y K
exaly   +2 more sources

Charge Exchange Reaction in Dopant-Assisted Atmospheric Pressure Chemical Ionization and Atmospheric Pressure Photoionization [PDF]

open access: yesJournal of the American Society for Mass Spectrometry, 2016
The efficiencies of charge exchange reaction in dopant-assisted atmospheric pressure chemical ionization (DA-APCI) and dopant-assisted atmospheric pressure photoionization (DA-APPI) mass spectrometry (MS) were compared by flow injection analysis ...
Anu Vaikkinen   +2 more
exaly   +3 more sources

Charge exchange ionization in collision cells as a method to detect the presence of long-lived excited electronic states of polyatomic ions [PDF]

open access: yesJournal of the American Society for Mass Spectrometry, 2001
Charge exchange ionization in collision cells installed in a double focusing mass spectrometer with reversed geometry has been used to detect the presence of a long-lived excited electronic state of benzene ion.
Joong Chul Choe, Chan Ho Kwon
exaly   +2 more sources

Charge exchange and ionization cross sections of H+ + H collision in dense quantum plasmas [PDF]

open access: yesPhysics of Plasmas, 2013
The plasma screening effects of dense quantum plasmas on H+ + H charge exchange and ionization cross sections are calculated by the classical trajectory Monte Carlo method. For charge exchange cross sections, it is found that the screening effects reduce
Xin Qi, Lei Yang
exaly   +2 more sources

Comparison of dopants for charge exchange ionization of nonpolar polycyclic aromatic hydrocarbons with reversed-phase LC-APPI-MS [PDF]

open access: yesJournal of the American Society for Mass Spectrometry, 2009
Atmospheric pressure photoionization (APPI) is capable of ionizing nonpolar compounds in LC/MS, through charge exchange reactions following photoionization of a dopant. Recently, several novel dopants—chlorobenzene, bromobenzene, 2,4-difluoroanisole, and
Michael W Blades, Damon B Robb
exaly   +2 more sources

A new type of ionizer for charge-exchange particle analyzer

Review of Scientific Instruments, 2018
The application of effective methods of charge-exchange neutral particle diagnostics to determine ion temperatures of plasmas in modern plasma installations is of great practical interest. In this paper, we propose a new type of ionizer based on ionization of neutral charge-exchange particles reflecting from metallic surfaces.
Yu. V. Gott, A. A. Kadyrgulov
openaire   +2 more sources

Charge exchange, excitation, and ionization via hidden avoided crossings

Physical Review A, 1990
General principles of the asymptotic theory of adiabatically slow atomic collisions are reviewed. Special emphasis is placed on analytic properties of adiabatic potential energy curves for complex values of internuclear separation. The significance of the complex branch points and hidden avoided crossings for the dynamics of one-electron collisional ...
, Grozdanov, , Solov'ev
openaire   +2 more sources

On the dynamics of the perturbations in an ionized gas dominated by charge exchange

Meccanica, 1985
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Buttazzoni, Franco, Nocentini, Aldo
openaire   +1 more source

Simulation of the relative atomic populations of elements 1 ≤ Z ≤89 following charge exchange tested with collinear resonance ionization spectroscopy of indium [PDF]

open access: yesSpectrochimica Acta, Part B: Atomic Spectroscopy, 2019
Calculations of the neutralisation cross-section and relative population of atomic states were performed for ions beams (1 ≤ Z ≤ 89) at 5 and 40 keV incident on free sodium and potassium atoms.
Gerda Neyens, Wouter Gins, K M Lynch
exaly   +2 more sources

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