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- Q7928256 subject Q8838531.
- Q7928256 abstract "The Viehland-Mason theory is a two-temperature theory for charged and neutral atoms, which explains how trace ions can have a substantially different temperature than dilute gas atoms. It is one of any of a number of kinetic theories of the transport of trace amounts of molecular ions through neutral gases under the influence of a uniform electrostatic field. Dr. Larry Viehland and Dr. Ed Mason developed it in the late 1970s. They later extended this theory into a three-temperature theory that allowed for different ion temperatures parallel and perpendicular to the electric field. Current work for atomic ion-neutral systems uses a Gram-Charlier probability function as a zero-order approximation to the ion velocity distribution function.The Gram-Charlier theory has been remarkably successful in producing calculated mobilities and diffusion coefficients that are in excellent agreement with experimental results if the microscopic force between the ion and atom is accurately known over a wide range of separation. The Viehland-Mason theories for molecular ions in molecular gases are more elaborate than those for atoms, since the forces are angle-dependent and since internal degrees of freedom must be included. Theories have been developed using quantum-mechanical and semi-classical approaches, but there have been no numerical applications because it is extremely difficult to calculate the necessary cross-sections. To circumvent this difficulty, completely classical kinetic theories for atomic ions in non-vibrating (rigid rotor) diatomic gases and for non-vibrating diatomic ions in atomic or non-vibrating diatomic gases have been developed.".
- Q7928256 wikiPageWikiLink Q11216.
- Q7928256 wikiPageWikiLink Q11369.
- Q7928256 wikiPageWikiLink Q11432.
- Q7928256 wikiPageWikiLink Q11466.
- Q7928256 wikiPageWikiLink Q163214.
- Q7928256 wikiPageWikiLink Q1751859.
- Q7928256 wikiPageWikiLink Q17737.
- Q7928256 wikiPageWikiLink Q200286.
- Q7928256 wikiPageWikiLink Q205034.
- Q7928256 wikiPageWikiLink Q274502.
- Q7928256 wikiPageWikiLink Q36496.
- Q7928256 wikiPageWikiLink Q46221.
- Q7928256 wikiPageWikiLink Q46344.
- Q7928256 wikiPageWikiLink Q5335123.
- Q7928256 wikiPageWikiLink Q845080.
- Q7928256 wikiPageWikiLink Q8838531.
- Q7928256 wikiPageWikiLink Q9121.
- Q7928256 comment "The Viehland-Mason theory is a two-temperature theory for charged and neutral atoms, which explains how trace ions can have a substantially different temperature than dilute gas atoms. It is one of any of a number of kinetic theories of the transport of trace amounts of molecular ions through neutral gases under the influence of a uniform electrostatic field. Dr. Larry Viehland and Dr. Ed Mason developed it in the late 1970s.".
- Q7928256 label "Viehland-Mason theory".