Evidence for population of highly asymmetric states in double-electron capture by O[sup 7,8+] and N[sup 7+] colliding with He at low to intermediate velocities

Journal Article · Fri Jul 01 00:00:00 EDT 1994 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.50.502· OSTI ID:7233032

Wu, W; Giese, J P; Chen, Z; Ali, R; Cocke, C L; Richard, P; Stoeckli, M ^[1]

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1. J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506-2604 (United States)

Electron capture by O[sup 7,8+] and N[sup 7+] in collisions with He at 0.2--1.7 a.u. was investigated using coincident recoil momentum spectroscopy. The [ital Q] values and angular differential cross sections for single capture, transfer ionization (TI), and double capture (DC) were measured. Our [ital Q]-value measurements indicate that the electrons are captured into less tightly bound states with increasing collision velocity. The [ital Q] values and angular differential cross sections for DC and TI by O[sup 8+] are approximately the same, while those for DC and TI by O[sup 7+] and N[sup 7+] differ significantly. Our analysis indicates that the population of very asymmetric states ([ital n]=2, [ital n][prime][gt]10) is necessary to explain this difference.

• OSTI ID: 7233032
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 50:1; 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
ASYMMETRY
ATOM COLLISIONS
AUTOIONIZATION
CAPTURE
CHARGED PARTICLES
COINCIDENCE METHODS
COINCIDENCE SPECTROMETRY
COLLISIONS
COUNTING TECHNIQUES
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELECTRON CAPTURE
ELEMENTS
FLUIDS
GASES
HELIUM
ION COLLISIONS
ION-ATOM COLLISIONS
IONIZATION
IONS
MULTICHARGED IONS
NITROGEN IONS
NONMETALS
OXYGEN IONS
RARE GASES
RECOILS