Temperature Dependent Product Yields for the Spin Forbidden Singlet Channel of the C(3P) + C2H2 Reaction

Abstract

The atomic hydrogen formation channels of the C + C2H2 reaction have been investigated using a continuous supersonic flow reactor over the 52 K 296 K temperature range. H-atoms were detected directly at 121.567 nm by vacuum ultraviolet laser induced fluorescence. Absolute H-atom yields were determined by comparison with the H-atom signal generated by the C + C2H4 reaction. The product yields agree with earlier crossed beam experiments employing universal detection methods. Incorporating these branching ratios in a gas-grain model of dense interstellar clouds increases the cC3H abundance. This reaction is a minor source of C3 containing molecules in the present simulations.

15 pages, 3 figures

References in corpus (3)

• The 2014 KIDA network for interstellar chemistry
• Cold CO in circumstellar disks: On the effects of photodesorption and vertical mixing
• A sensitivity study of the neutral-neutral reactions C + C3 and C + C5 in cold dense interstellar clouds

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