A New Approach to Generating Negative Ion Beams

The report describes measurements of ion-pair production cross sections for He*(2(1,3)S)-Li, Li-Cs, Li-Na, and Li-Na*(3p) collisions at energies of several keV. Measurements of chemi-ionization cross sections for He*(2(1,3)S)-Li collisions are also mentioned. A method is described for exciting a fra...

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Hauptverfasser:	Neynaber, Roy H, Tang, Sheng Y
Format:	Report
Sprache:	eng
Schlagworte:	ANIONS Atomic and Molecular Physics and Spectroscopy CESIUM Chemiionization CROSS SECTIONS DYE LASERS HELIUM ION BEAMS IONIZATION LASERS LITHIUM MOLECULAR BEAMS PAIR PRODUCTION Particle Accelerators PARTICLE COLLISIONS PE61102F RATES REACTION TIME SODIUM WUAFOSR2301
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Zusammenfassung:	The report describes measurements of ion-pair production cross sections for He(2(1,3)S)-Li, Li-Cs, Li-Na, and Li-Na(3p) collisions at energies of several keV. Measurements of chemi-ionization cross sections for He*(2(1,3)S)-Li collisions are also mentioned. A method is described for exciting a fraction of the atoms in a Li vapor to the 2p resonance state using a dye laser. The fraction is determined by observing with the laser on and off the ion-pair production of Cl- when a fast Cl beam collides with the vapor. Keywords: Ion pair production, Ionization, Cross sections, Molecular beams, Reaction rates.