Dissociation of multicharged CO molecular ions produced in collisions with 97-MeV Ar sup 14+ : Dissociation fractions and branching ratios

Journal Article · Thu Oct 01 00:00:00 EDT 1992 · Physical Review A. General Physics; (United States)

DOI:https://doi.org/10.1103/PhysRevA.46.3929· OSTI ID:6997464

Wohrer, K; Sampoll, G; Watson, R L; Chabot, M; Heber, O; Horvat, V ^[1]

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1. Cyclotron Institute, Texas A M University, College Station, Texas 77843 (United States) Department of Chemistry, Texas A M University, College Station Texas 77843 (United States)

Data on the production and dissociation of CO{sup {ital Q}+} molecular ions (where {ital Q}=1 through 7) obtained by ion-ion coincidence time-of-flight measurements were analyzed to determine production yields, dissociation fractions, and branching ratios. A detailed comparison of the dissociation fractions for CO{sup +} and CO{sup 2+} for several collision systems in the same perturbative regime revealed them to be quite similar, whereas the dissociation fraction for CO{sup +} produced by valence-electron photoionization is a factor of 1.8 to 3.6 larger. The results for {ital Q}{ge}2 indicated a preference for dissociation channels leading to symmetric or nearly symmetric charge division. An enhancement of the total ionization yields for {ital Q}{gt}4 was observed, and it suggests that electron transfer followed by {ital LMM} Auger decay plays an important role in determining the final charges of the dissociation products.

• OSTI ID: 6997464
• Journal Information: Physical Review A. General Physics; (United States), Journal Name: Physical Review A. General Physics; (United States) Vol. 46:7; ISSN 1050-2947; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ARGON IONS
BRANCHING RATIO
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHARGE STATE
CHARGED PARTICLES
COINCIDENCE METHODS
COLLISIONS
COUNTING TECHNIQUES
DISSOCIATION
ENERGY RANGE
ION COLLISIONS
ION-ION COLLISIONS
IONIZATION
IONS
MEV RANGE
MEV RANGE 10-100
MOLECULAR IONS
MULTICHARGED IONS
OXIDES
OXYGEN COMPOUNDS
YIELDS