ELECTRONIC AND IONIC REACTIONS IN ATMOSPHERIC GASES.
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 14, 1966
- Accession Number
- AD0643093
Entities
People
- B. R. Turner
- D. M. J. Compton
- J. A. Rutherford
- J. William Mcgowan
- M. A. Fireman
Organizations
- General Dynamics