Electron-electron interactions in fast neutral-neutral collisions

Conference · Sun Nov 01 00:00:00 EST 1992

OSTI ID:10114440

DuBois, R D ^[1]; Manson, S T ^[2]

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1. Pacific Northwest Lab., Richland, WA (United States)
2. Georgia State Univ., Atlanta, GA (United States). Dept. of Physics and Astronomy

Differential electron emission is studied for 50--500 keV H{sup +} and H atom impact on helium. Using the first Born formulation, it is shown that projectile electron-target electron interactions are expected to dominate the differential cross sections for low energy target electron emission induced by fast neutral projectile impact on any target. Measurements of the 15{degrees} electron emission were made in order to investigate this prediction. For low impact energies, a constant ratio between the hydrogen atom and proton impact cross sections was found for emitted electron velocities less than half the projectile velocity, V{sub p} But as the collision energy increased, for electron velocities less than 0.25 V{sub p}, the cross section ratio increased as the emitted electron velocity decreased. This is interpreted as a signature of projectile electron-target electron interactions becoming dominant for distant collisions between neutral particles.

• Research Organization: Pacific Northwest Lab., Richland, WA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States); Department of Defense, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 10114440
• Report Number(s): PNL-SA-21188; CONF-921116-20; ON: DE93004841; CNN: Contract DAAL03-89-K-0098
• Resource Relation: Conference: 12. international conference on the application of accelerators in research and industry,Denton, TX (United States),2-5 Nov 1992; Other Information: PBD: Nov 1992
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ELECTRON-ELECTRON COLLISIONS
ATOM-ATOM COLLISIONS
ELECTRON EMISSION
HYDROGEN
ION-ATOM COLLISIONS
HELIUM
HYDROGEN IONS 1 PLUS
CROSS SECTIONS
GROUND STATES
IONIZATION
664300
664400
COLLISION PHENOMENA
EXPERIMENTALLY DERIVED INFORMATION ON ATOMIC AND MOLECULAR PROPERTIES