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Negative-ion formation from dissociative collisions of H/sub 2/ /sup +/, H/sub 3/ /sup +/, and HD/sub 2/ /sup +/ in H/sub 2/, He, and Xe

Journal Article · · Phys. Rev., A; (United States)
Negative formation cross sections have been determined for dissociative collisions of H/sub 2/ /sup +/, H/sub 3/ /sup +/, and HD/sub 2/ /sup +/ in H/sub 2/, He, and Xe in the energy region from 40 to 600 keV. In addition, the maximum and equilibrium H/sup -/ or D/sup -/ fractions for the three molecular ions in H/sub 2/ gas were determined. For equivelocity incident HD/sub 2/ /sup +/ and H/sub 3/ /sup +/, D/sup -/ or H/sup -/ formation cross sections were the same. For H/sub 2/ /sup +/ the H/sup -/ formation cross sections were smaller than those of the triatomic incident beams for velocities greater than 3.3 x 10/sup 8/ cm/sec. Equilibrium fractions were independent of the incident particle at equal velocities and were 0.024 at 2 x 10/sup 8/ cm/sec. (AIP)
Research Organization:
Instituto de Fisica, Mexico, 20, D.F.
OSTI ID:
7359940
Journal Information:
Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 14:2; ISSN PLRAA
Country of Publication:
United States
Language:
English