Accession Number : AD0692957

Title :   UPPER ATMOSPHERE ION-MOLECULE REACTIONS.

Descriptive Note : Final rept. 1 Sep 63-31 Aug 68,

Corporate Author : JOHNS HOPKINS UNIV BALTIMORE MD DEPT OF CHEMISTRY

Personal Author(s) : Koski,Walter S.

Report Date : APR 1969

Pagination or Media Count : 63

Abstract : Using a comparatively unique facility consisting of a tandem mass spectrometer and associated equipment ion-molecule reactions expected to occur in the upper atmosphere have been investigated. The studies included hydrogen, carbon, oxygen, nitorgen and rare gas ions with molecular and rare gas constituents in the atmosphere. The charge transfer cross sections for a single electron transfer to a doubly charged ion for several reactions were measured. The energy range covered was 1 keV-8 keV. The reactions of the rare gas ions helium, neon, argon, krypton, xenon with ammonia were observed. The fractional yields and the relative cross sections for rare gas ion reactions with ammonia were determined for the 3 eV to 200 eV energy region. The argon-hydrogen deuterium ion reaction was studied and the results published. Absolute cross sections and kinetic isotope ratios for the dissociation of the hydrogen-deuterium ion into protons and denterons when striking helium, neon, argon, krypton and xenon were investigated up to 50 eV incident kinetic energy. The calibration of the mass spectrometer is described in detail. Included are reprints of the author's published work. (Author)

Descriptors :   (*UPPER ATMOSPHERE, *GAS IONIZATION), MASS SPECTROSCOPY, IONS, HYDROGEN, CARBON, OXYGEN, NITROGEN, RARE GASES, MASS SPECTRA, NITROGEN OXIDES, AMMONIA, DEUTERIUM

Subject Categories : Atmospheric Physics
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE