Photodissociation lifetimes of CH and CD radicals in comets

Details Photodissociation lifetimes of CH and CD radicals in comets Photodissociation lifetimes of CH and CD radicals in comets

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987esasp.278..177s&link_type=abstract

In ESA, Proceedings of the International Symposium on the Diversity and Similarity of Comets p 177-179 (SEE N88-21884 14-91)

Physics

4

Comets, Free Radicals, Photodissociation, Electron Transitions, Hydrocarbons, Interstellar Chemistry

Scientific paper

The rates of photodissociation of the CH radical from absorption of solar radiation are calculated to lie between 4.16×10-3s-1 and 2.67×10-2s-1 for heliocentric velocities between -42 and 42 km s-1 at 1 AU from the sun. For CD, the corresponding rates lie between 4.33×10-3 and 1.31×10-2s-1. The CH and CD radicals may be detectable in comets through absorption lines of the C2Σ+ - X2Πr electronic bands near 3143.2 Å and 3142.1 Å, respectively.

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