Journal ArticleDOI
Determination of the absolute partial and total cross sections for electron-impact ionization of the rare gases
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In this article, the electron-impact ionization cross sections of helium, neon, argon, krypton, and xenon are reported for energies ranging from the first ionization threshold to 1000 eV.Abstract:
Accurate values of the electron-impact ionization cross sections for the rare gases are needed in a variety of contexts. However, despite numerous investigations over many decades, uncertainty as to the correct values has persisted. The pioneering total-cross-section measurements of Rapp and Englander-Golden are generally regarded as the most reliable but no comprehensive study has independently verified their correctness. In this paper, measurements of electron-impact ionization cross sections of helium, neon, argon, krypton, and xenon are reported for energies ranging from the first ionization threshold to 1000 eV. These data confirm the essential correctness of Rapp and Englander-Golden's total measurements and at the same time provide a complete set of consistent absolute partial cross sections.read more
Citations
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Journal ArticleDOI
The Neutral Gas and Ion Mass Spectrometer on the Mars Atmosphere and Volatile Evolution Mission
Paul R. Mahaffy,Mehdi Benna,Todd King,D. N. Harpold,Robert Arvey,Michael Barciniak,Mirl Bendt,Daniel Carrigan,Therese Errigo,Vincent Holmes,Christopher S. Johnson,James W. Kellogg,Patrick Kimvilakani,Matthew Lefavor,Jerome Hengemihle,Ferzan Jaeger,Eric Lyness,John Maurer,Anthony Melak,Felix Noreiga,Marvin Noriega,Kiran Patel,B. D. Prats,E. Raaen,Florence Tan,Edwin Weidner,Cynthia Gundersen,Steven Battel,Bruce P. Block,Ken Arnett,Ryan M. Miller,Curt Cooper,Charles Edmonson,J. Thomas Nolan +33 more
TL;DR: The Neutral Gas and Ion Mass Spectrometer (NGIMS) of the Mars Atmosphere and Volatile Evolution Mission (MAVEN) is designed to measure the composition, struc- ture, and variability of the upper atmosphere of Mars.
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The B-spline R-matrix method for atomic processes: application to atomic structure, electron collisions and photoionization
Oleg Zatsarinny,Klaus Bartschat +1 more
TL;DR: In this article, the basic ideas of the B-spline R-matrix approach are reviewed, and the use of the method is illustrated with a variety of applications to atomic structure, electron?atom collisions and photo-induced processes.
Journal ArticleDOI
An update of argon inelastic cross sections for plasma discharges
TL;DR: In this paper, a coherent set of electron impact inelastic cross sections for argon was proposed based on recent experimental measurements and validated by comparing calculated swarm parameters and rate coefficients (obtained by solving the twoterm approximation electron Boltzmann equation) with available experimental data.
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Cross Sections for Inner-Shell Ionization by Electron Impact
TL;DR: In this paper, an analysis is presented of measured and calculated cross sections for inner-shell ionization by electron impact, and the essentials of classical and semiclassical models and quantum approximations for computing ionization cross sections.
References
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Journal ArticleDOI
Total Cross Sections for Ionization and Attachment in Gases by Electron Impact. I. Positive Ionization
TL;DR: In this paper, a new method was devised for obtaining absolute cross sections of gases relative to H2, and a McLeod gauge was used to obtain the absolute cross section in H2.
Journal ArticleDOI
Binary-encounter-dipole model for electron-impact ionization
Yong-Ki Kim,M. Eugene Rudd +1 more
TL;DR: In this article, a theoretical model for calculating electron-impact ionization cross sections for atoms and molecules is presented, which combines the binary-encounter theory with the dipole interaction of the Bethe theory for fast incident electrons.
Journal ArticleDOI
Electron Impact Ionization Cross-Section Data for Atoms, Atomic Ions, and Diatomic Molecules: I. Experimental Data
L. J. Kieffer,Gordon H. Dunn +1 more
TL;DR: In this article, a compilation and critical evaluation of absolute cross-sections for ionization of atoms and diatomic molecules by electron impact is presented, along with a brief discussion of relative cross-section data near threshold.
Journal ArticleDOI
Absolute cross sections for electron-impact ionization of the rare-gas atoms by the fast-neutral-beam method
TL;DR: Measurements of ionization cross sections for the four rare gases He, Ne, Ar, and Kr from 0 to 200 eV agree with the most reliable previous values within \ifmmode\pm\else\textpm\fi{}6%.
Journal ArticleDOI
Charge exchange cross sections of hydrogen ions in gases
P. M. Stier,C. F. Barnett +1 more
TL;DR: In this article, the authors measured the cross section for electron capture, electron loss, and electron detachment for hydrogen atoms and ions traversing several gases, and the fraction of the beam in each charge state after passing through a "thick target" was also determined.
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