Accession Number : AD0269408

Title :   ELECTRON IMPACT IONIZATION OF ATOMIC HYDROGEN AND ATOMIC OXYGEN

Corporate Author : GENERAL DYNAMICS/POMONA CALIF

Personal Author(s) : ROTHE,ERHARD W. ; MARINO,LAWRENCE L.

Report Date : 15 AUG 1961

Pagination or Media Count : 1

Abstract : The total cross sections for the ionization of atomic oxygen and atomic hydrogen were measured by a modulated molecular beam technique. The impact energies were 100 to 500 ev for oxygen and 100 to 750 ev for hydrogen. The number of ions formed in a region defined by the intersection of an electron beam and a modulated molecular beam was compared with the number formed when the neutral beam was partially dissociated. All ions were collected, including those energetic ions formed in dissociative ionization. The degree of dissociation was measured with a mass spectrometer. The ratio of the atomic to the molecular ionization cross sections were obtained. Absolute atomic values were calculated by multiplying these ratios by molecular ionization cross sections. Results are compared with theoretical estimates and previous experimental determinations. (Author)

Descriptors :   *HYDROGEN, *IONIZATION, ATOMS, DISSOCIATION, ELASTIC SCATTERING, ELECTRON GUNS, EXPERIMENTAL DATA, IONIZATION CHAMBERS, IONIZATION POTENTIALS, IONS, MASS SPECTROSCOPY, MOLECULAR BEAMS, OXYGEN, PROBABILITY, SPECTRUM ANALYZERS, TRANSPORT PROPERTIES

Distribution Statement : APPROVED FOR PUBLIC RELEASE