Accession Number : AD0433190
Title : Vibrational Excitation of N2, CO, and H2 by Electron Impact
Descriptive Note : Technical rept.
Corporate Author : WESTINGHOUSE ELECTRIC CORP PITTSBURGH PA
Personal Author(s) : Schulz, G J
Report Date : Jan 1964
Pagination or Media Count : 34
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 ia 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 : *ELECTRONS , *EXCITATION , *VIBRATION , CARBON COMPOUNDS , ELECTROMETERS , ELECTROSTATICS , GASES , HYDROGEN , MEASUREMENT , MONOXIDES , NITROGEN , SCATTERING
Subject Categories : Atomic and Molecular Physics and Spectroscopy
Distribution Statement : APPROVED FOR PUBLIC RELEASE