Electron capture and transfer ionization in collisions of H{sup +} and He{sup 2+} ions with oxygen atoms

Journal Article · Wed May 01 04:00:00 EDT 1996 · Bulletin of the American Physical Society

OSTI ID:394275

Thompson, W R; Shah, M B; Gilbody, H B ^[1]

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1. Queen`s Univ., Belfast (United Kingdom)

A crossed beam technique incorporating time-of-flight analysis and coincidence counting of the collision products has been used to study electron capture processes leading to O{sup +} and O{sup 2+} formation in collisions of 6 - 100 keV amu{sup {minus}1} H{sup +} and 10-67 keV amu{sup {minus}1} He{sup 2+} ions with ground state oxygen atoms. For H{sup +} impact, electron capture cross sections, which are dominated by accidentally resonant charge transfer are in good accord with most previous lower energy data. The corresponding cross sections for transfer ionization leading to O{sup 2+} formation pass through a peak at 34 KeV amu{sup {minus}1} where this process accounts for about 9% of the total one electron capture rising to 17.5% at 100 keV. Similar data have been obtained for He{sup 2+} impact where the resonant He{sup +}(2s) capture channel dominates at low energies.

• OSTI ID: 394275
• Report Number(s): CONF-9605105--
• Journal Information: Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 3 Vol. 41; ISSN BAPSA6; ISSN 0003-0503
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ELECTRON CAPTURE
HELIUM IONS
HYDROGEN IONS 1 PLUS
ION-ATOM COLLISIONS
IONIZATION
KEV RANGE 01-10
KEV RANGE 10-100
KEV RANGE 100-1000
OXYGEN