Radiative association of CH3(+) and H2 at 13 K

Details Radiative association of CH3(+) and H2 at 13 K Radiative association of CH3(+) and H2 at 13 K

Mar 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984phrvl..52..902b&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 52, March 12, 1984, p. 902-905.

Physics

58

Association Reactions, Formaldehyde, Gas-Ion Interactions, Hydrogen, Interstellar Chemistry, Methane, Ion Traps (Instrumentation), Molecular Clouds, Radiation Chemistry, Radiative Transfer

Scientific paper

The first observation and measurement of two-body ion-neutral association at low temperatures and densities are reported. The rate at 13 K for the reaction in which CH3(+) + H2 yields CH5(+) + h x nu is determined to be (1.8 + or - 0.3) x 10 to the -13th cu cm/s for a normal (3 to 1) mix of ortho and para hydrogen. The reaction conditions are such that the process can only proceed by radiative stabilization of the collision complex. The detailed rate value is considered important for determining methane (Graedel et al., 1982; Smith and Adams, 1978) and formaldehyde (de Jong et al., 1980) concentrations in the interstellar medium. The rate and its measurement, however, are equally important as prototypes for the process.

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