Prediction of the energy dependence of molecular fragmentation cross sections for collisions of swift protons with ethane and acetylene

Journal Article · Fri Apr 01 04:00:00 EST 2005 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.71.044702· OSTI ID:20653371

Cabrera-Trujillo, Remigio; Sabin, John R; Deumens, Erik; Oehrn, Yngve ^[1]

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1. Departments of Physics and Chemistry, University of Florida, Gainesville, Florida 32611-8435 (United States)

We report the energy-dependent fragmentation cross sections for several of the more likely fragmentation channels for protons with up to 10 keV impact energy colliding with acetylene and ethane. We find that the predominant channels are those which involve the dissociation of a carbon-hydrogen bond, and we find that the cross sections for these channels are maximum in the low-projectile-energy region. The cross sections for fragmentation involving dissociation of a C-C bond are an order of magnitude smaller and peak at somewhat higher projectile energy. Although there are no experimental values with which to compare, it appears that selection of projectile energy can be used to influence branching ratios in proton-hydrocarbon collisions and, by implication, in other ion-molecule and atom-molecule collisions.

• OSTI ID: 20653371
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 4 Vol. 71; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ACETYLENE
ATOM-MOLECULE COLLISIONS
BRANCHING RATIO
CARBON
CHEMICAL BONDS
COMPARATIVE EVALUATIONS
CROSS SECTIONS
DISSOCIATION
ENERGY DEPENDENCE
ETHANE
HYDROGEN
IONS
KEV RANGE
MOLECULES
PROTONS