Low-energy collisions of O[sup 5+] ions with He atoms: Single-electron capture, projectile excitation, and transfer excitation and ionization

Journal Article · Sat Apr 01 04:00:00 EST 1995 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.51.2989· OSTI ID:6584810

Shimakura, N; Yamada, S; Suzuki, S ^[1]; Kimura, M ^[2]

---

1. Department of Chemistry, Faculty of Science, Niigata University, Niigata 950-21 (Japan) Graduate School of Science and Technology, Niigata University, Niigata 950-21 (Japan)
2. Argonne National Laboratory, Argonne, Illinois 60439 (United States) Department of Physics, Rice University, Houston, Texas 77251 (United States)

A theoretical study of various inelastic processes resulting from collisions of O[sup 5+] ions with He atoms is carried out by a semiclassical molecular-orbital expansion method with the inclusion of electron translation factors at collision energies of 60 eV/u to 15 keV/u. In addition to the single-electron-capture process, projectile excitation and transfer excitation and ionization processes are also studied, and the corresponding cross sections are determined. Dominant processes are found to be a single-electron capture to the O[sup 4+](2[ital s]3[ital s]) and O[sup 4+](2[ital s]3[ital p]) states. Other channels are found to make weak but non-negligible contributions. All processes proceed on the outgoing part of the collision, after the transitions from the initial channel to the single-electron-capture channels are completed. Hence, direct processes to projectile excitation and transfer excitation are nearly negligible. The agreement of the present calculation for single-electron capture with measurements is very good.

• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6584810
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 50:4; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
CAPTURE
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
ELECTRON CAPTURE
ELECTRON TRANSFER
ELEMENTS
ENERGY DEPENDENCE
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EXCITATION
FLUIDS
GASES
HELIUM
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
KEV RANGE
MULTICHARGED IONS
NONMETALS
OXYGEN IONS
RARE GASES
TOTAL CROSS SECTIONS