Accession Number : ADA191119

Title :   A New Approach to Generating Negative Ion Beams.

Descriptive Note : Final rept. 1 Jul 86-30 Sep 87,

Corporate Author : CALIFORNIA UNIV SAN DIEGO LA JOLLA

Personal Author(s) : Neynaber, Roy H ; Tang, Sheng Y

PDF Url : ADA191119

Report Date : 02 Nov 1987

Pagination or Media Count : 4

Abstract : 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.

Descriptors :   *ION BEAMS, *IONIZATION, *MOLECULAR BEAMS, *PAIR PRODUCTION, ANIONS, CROSS SECTIONS, DYE LASERS, LASERS, RATES, REACTION TIME, HELIUM, LITHIUM, CESIUM, SODIUM, PARTICLE COLLISIONS

Subject Categories : Atomic and Molecular Physics and Spectroscopy
      Particle Accelerators

Distribution Statement : APPROVED FOR PUBLIC RELEASE