Accession Number : AD0643093

Title :   ELECTRONIC AND IONIC REACTIONS IN ATMOSPHERIC GASES.

Descriptive Note : Yearly technical summary rept., 1 Sep 65-31 Aug 66,

Corporate Author : GENERAL DYNAMICS CORP SAN DIEGO CALIF GENERAL ATOMIC DIV

Personal Author(s) : Turner,B. R. ; Compton,D. M. J. ; McGowan,J. William ; Fireman,M. A. ; Rutherford,J. A.

Report Date : 14 NOV 1966

Pagination or Media Count : 79

Abstract : The cross sections for charge transfer in collisions between nitric oxide and atomic and molecular positive ions of oxygen and nitrogen were measured in the energy range from 3 to 200 eV in a crossed beam experiment. A smooth interpolation is made between these results and the rate coefficients obtained at thermal energy by the afterglow technique. Using similar information for the reaction O2+ + N2 to O2 + N2+, a technique to determine the fractional concentration of the excited ions in an ion beam as a function of source electron energy was developed. Several negative ion reactions, primarily charge transfer, were investigated in the energy range 2 eV to several hundred eV. Development work on an atomic oxygen source was carried out, and the results are described. The source is suitable for the measurement of relative cross sections. The dependence of the cross section for the reaction N2O + e to N2 + O(-) on N2O temperature was measured to be small, unlike that for similar reactions for O2. The ionization cross section near threshold for O2 was analyzed, and an interpretation of the ionization cross section is given for O2, N2 and H2 in terms of the relative contributions of direct and indirect ionization processes.

Descriptors :   (*ATMOSPHERES, *GAS IONIZATION), (*UPPER ATMOSPHERE, GAS IONIZATION), NITROGEN COMPOUNDS, OXIDES, OXYGEN, NITROGEN, CHEMICAL REACTIONS, PROBABILITY, IONS, GLOW DISCHARGES, MOLECULAR BEAMS, ATOMIC ENERGY LEVELS, ION BEAMS, EXCHANGE REACTIONS, HYDROGEN, ELECTRON IRRADIATION, NUCLEAR EXPLOSIONS, RADIOFREQUENCY INTERFERENCE

Subject Categories : Atmospheric Physics
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE