Accession Number : AD0435090


Title :   ATOMIC COLLISION PROCESSES RELATING TO THE IONOSPHERE


Descriptive Note : Semiannual technical Summary rept. 1 Sep 1963-28 Feb 1964


Corporate Author : WESTINGHOUSE ELECTRIC CORP PITTSBURGH PA


Personal Author(s) : Schulz, G J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/435090.pdf


Report Date : 28 Feb 1964


Pagination or Media Count : 36


Abstract : The cross section for vibrational excitation of N2, CO, and H2 by electron impact is measured using a double electrostatic analyzer. Electrons are examined after scattering from the molecules at an angle of 72 degrees. Both N2 and CO exhibit a small vibrational cross section to the first state below 1.7 eV and 1.0 eV, respectively, which is attributed to direct excitation by electron impact. Above these energies, many vibrational states are excited and the cross section becomes large; it is postulated that the excitation proceeds via a compound state of N2 and CO. The peak of the cross section occurs at 2.3 eV in N2 and 1.75 eV in CO. In hydrogen, the cross section to the first vibrational state predominates; the cross section to the second vibrational state of H2 is about 14% of the first state, at an energy of 3.4 eV.


Descriptors :   *VIBRATION , ENERGY , ELECTROMETERS , NITROGEN , HYDROGEN , ELASTIC SCATTERING , IONOSPHERE , VOLTAGE


Subject Categories : Atmospheric Physics
      Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE