Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...465..795w&link_type=abstract
Astrophysical Journal v.465, p.795
Astronomy and Astrophysics
Astronomy
14
Ism: Abundances, Molecular Processes, Ism: Clouds
Scientific paper
New experimental results on the rates of selected neutral-neutral reactions involving either gas-phase atoms (C) or radicals (OH, CN) show that these reactions are much more rapid than previously believed. It is currently unclear, however, how general these results are. The results of chemical models of dense interstellar clouds are strongly affected by the inclusion of large numbers of rapid neutral-neutral gas-phase reactions, most of which have not yet been studied in the laboratory. Unstudied reactions involving atomic oxygen and carbon clusters are known to curtail the synthesis of complex molecules if they occur rapidly at low temperatures. In this paper, using quantum chemical and dynamical studies, we show that the prototype reaction between O and C3 possesses a small activation energy barrier and does not occur rapidly at low temperatures, even when tunneling is considered.
Herbst Eric
Woon David E.
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