Low-energy inelastic collisions of OH radicals with He atoms and D{sub 2} molecules

Journal Article · Fri Oct 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.042717· OSTI ID:21450785

Kirste, Moritz; Scharfenberg, Ludwig; Meijer, Gerard; Klos, Jacek ^[1]; Lique, Francois ^[2]; Alexander, Millard H ^[3]

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1. Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742-2021 (United States)
2. LOMC, Universite du Havre, 25 Rue Philippe Lebon, Boite Postale 540-76 058, Le Havre Cedex (France)
3. Department of Chemistry and Biochemistry and Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742-2021 (United States)

We present an experimental study on the rotational inelastic scattering of OH (X {sup 2}{Pi}{sub 3/2},J=3/2,f) radicals with He and D{sub 2} at collision energies between 100 and 500 cm{sup -1} in a crossed beam experiment. The OH radicals are state selected and velocity tuned using a Stark decelerator. Relative parity-resolved state-to-state inelastic scattering cross sections are accurately determined. These experiments complement recent low-energy collision studies between trapped OH radicals and beams of He and D{sub 2} that are sensitive to the total (elastic and inelastic) cross sections [Sawyer et al., Phys. Rev. Lett. 101, 203203 (2008)], but for which the measured cross sections could not be reproduced by theoretical calculations [Pavlovic et al., J. Phys. Chem. A 113, 14670 (2009)]. For the OH-He system, our experiments validate the inelastic cross sections determined from rigorous quantum calculations.

• OSTI ID: 21450785
• Journal Information: Physical Review. A, Vol. 82, Issue 4; Other Information: DOI: 10.1103/PhysRevA.82.042717; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
HELIUM
HYDROXYL RADICALS
INELASTIC SCATTERING
ION-ATOM COLLISIONS
ION-MOLECULE COLLISIONS
MOLECULES
PARITY
TOTAL CROSS SECTIONS
TRAPPING
VELOCITY
ATOM COLLISIONS
COLLISIONS
CROSS SECTIONS
ELEMENTS
FLUIDS
GASES
ION COLLISIONS
MOLECULE COLLISIONS
NONMETALS
PARTICLE PROPERTIES
RADICALS
RARE GASES
SCATTERING