Differential and integral cross sections in OH(X) + Xe collisions

Journal Article · Wed Jan 21 00:00:00 EST 2015 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.4906070· OSTI ID:22416016

Sarma, Gautam; Saha, Ashim Kumar; Meulen, J. J. ter; Marinakis, Sarantos ^[1]

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1. School of Biological and Chemical Sciences, Queen Mary University of London, Joseph Priestley Building, Mile End Road, London E1 4NS (United Kingdom)

Differential cross sections (DCSs) for inelastic collisions of OH(X) with Xe have been measured at a collision energy of 483 cm{sup −1}. The hydroxyl (OH) radicals were initially prepared in the X{sup 2}Π{sub 3/2} (v = 0, j = 1.5, f) level using the hexapole electric field selection method. Products were detected state-selectively by [2 + 1] resonance-enhanced multiphoton ionization of OH, combined with velocity-map imaging. Integral cross sections in OH(X) + Xe at a collision energy of 490 cm{sup −1} were also measured by laser-induced fluorescence. The results are compared with exact close-coupling quantum mechanical scattering calculations on the only available ab initio potential energy surface (PES). The agreement between experimental and theoretical results is generally very satisfactory. This highlights the ability of such measurements to test the available PES for such a benchmark open-shell system. The agreement between experiment and theory for DCSs is less satisfactory at low scattering angles, and possible reasons for this disagreement are discussed. Finally, theoretical calculations of OH(X) + He DCSs have been obtained at various collision energies and are compared with those of OH(X) + Xe. The role of the reduced mass in the DCSs and partial cross sections is also examined.

• OSTI ID: 22416016
• Journal Information: Journal of Chemical Physics, Vol. 142, Issue 3; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ATOM-MOLECULE COLLISIONS
BENCHMARKS
COMPARATIVE EVALUATIONS
COUPLING
DIFFERENTIAL CROSS SECTIONS
ELECTRIC FIELDS
FLUORESCENCE
HEXAPOLES
HYDROXIDES
HYDROXYL RADICALS
INTEGRAL CROSS SECTIONS
LASER RADIATION
PHOTOIONIZATION
POTENTIAL ENERGY
QUANTUM MECHANICS