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The Effect of Non-equilibrium Kinetics on Oxygen Chemistry in the Interstellar MediumIt has been suggested that in photon-dominated regions, oxygen chemistry is initiated by the O+H2 yields OH+H reaction. The reaction has an energy barrier of about 0.4 eV with ground state reactants and it is slow at low temperatures. There is strong experimental evidence that vibrational excitation of the H2 molecule increases the reactivity significantly. We present extensive quantum calculations of cross sections and rate coefficients for the O+H2(v) reaction for v = 0 - 3 of the H2 molecule and show that the vibrational excitation of the molecule has a significant effect on reactivity, especially at low temperatures.
Document ID
20060052446
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Naduvalath, Balakrishnan (Nevada Univ. Las Vegas, NV, United States)
Date Acquired
August 23, 2013
Publication Date
August 1, 2006
Publication Information
Publication: Proceedings of the NASA Laboratory Astrophysics Workshop
Subject Category
Astrophysics
Funding Number(s)
CONTRACT_GRANT: NSF ATM-02-05199
CONTRACT_GRANT: DE-FG36-05GO-85028
Distribution Limits
Public
Copyright
Public Use Permitted.

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