Production of Long-Lived H{sub 2}{sup -}, HD{sup -}, and D{sub 2}{sup -} during Grazing Scattering Collisions of H{sub 2}{sup +}, H{sub 3}{sup +}, D{sub 2}{sup +}, D{sub 3}{sup +} and D{sub 2}H{sup +} Ions with KBr, KCl, and LiF Surfaces
Journal Article
·
· AIP Conference Proceedings
- Department of Physics, Albion College, Albion, MI 49224-1831 (United States)
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6372 (United States)
We have investigated atomic and molecular anion production from singly charged atomic and molecular hydrogen, deuterium, and mixed isotope beams during grazing interactions with large area KBr, KCl, and LiF single crystal targets in the incident energy range 4-22.5 keV. Electron capture and, in the case of incident molecular ions, dissociation occur during the grazing interactions without appreciable angular straggling or change in velocity. As a result, atomic and molecular cation and anion interaction products are strongly peaked in the specular reflection direction, and, in case of dissociation products, at the fractional kinetic energies determined by the product fragment mass to incident mass ratios. A large-acceptance electrostatic analysis and detection system is used to collect the charged scattering products with high efficiency. Of particular interest is the production of metastable molecular ions H{sub 2}{sup -}, HD{sup -}, and D{sub 2}{sup -}. By comparing molecular anion yields obtained from incident hydrogen, deuterium and mixed isotope molecular ions, effects arising from isobaric contamination are seen for some incident molecular species.
- OSTI ID:
- 21289513
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1099; ISSN APCPCS; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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