Comment on Suppressed electron capture in slow O[sup +]([sup 4][ital S[ital o]],[sup 2][ital D[ital o]],[sup 2][ital P[ital o]])-He collisions''

Journal Article · Fri Apr 01 04:00:00 EST 1994 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.49.3131· OSTI ID:5002509

Kimura, M ^[1]; Gu, J P; Li, Y; Hirsch, G; Buenker, R J ^[2]

---

1. Argonne National Laboratory, Argonne, Illinois 6043, (United States) Department of Physics, Rice University, Houston, Texas 77251 (United States)
2. Theoretische Chemie, Bergische Universitaet-Gesamthochschule Wuppertal, D-42097 Wuppertal (Germany)

Electron capture in collisions of O[sup +] ions with He atoms is studied on the basis of a molecular-orbital expansion approach. The cross section for electron capture by metastable O[sup +]([sup 2][ital D], [sup 2][ital P]) ions is found to be larger by an order of magnitude than that for capture by ground-state O[sup +]([sup 4][ital S]) ions over the entire energy region studied. The energy dependencies of cross sections for electron capture by the ground and metastable ions are found to differ considerably below 2 keV. The present result, obtained by combining the cross section of 90% of the ground state and that of 10% of metastable states, reproduces reasonably well the experimental result of Kusakabe [ital et] [ital al]. [J. Phys. Soc. Jpn. 59, 1987 (1990)], who reported using the mixture of the ground and metastable O[sup +] ions. The present finding clearly contradicts another experimental result of Wolfrum [ital et] [ital al]. [Phys. Rev. A 45, R4218 (1992)], who reported no effect from the metastable states.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5002509
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 49:4; 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
CALCULATION METHODS
CAPTURE
CATIONS
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
D STATES
ELECTRON CAPTURE
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
EXCITED STATES
FLUIDS
GASES
GROUND STATES
HELIUM
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
KEV RANGE
METASTABLE STATES
MOLECULAR ORBITAL METHOD
NONMETALS
OXYGEN IONS
P STATES
RARE GASES
S STATES
SENSITIVITY ANALYSIS