The photodissociation lifetimes of the NH radical in comets

Details The photodissociation lifetimes of the NH radical in comets The photodissociation lifetimes of the NH radical in comets

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...178..277s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 178, no. 1-2, May 1987, p. 277-282.

Astronomy and Astrophysics

Astrophysics

11

Comets, Free Radicals, Gas Dissociation, Imides, Photodissociation, Life (Durability), Radial Velocity, Velocity Distribution, Comets, Photodissociation, Nh Radical, Solar Radiation, Calculations, Velocity, Distance, Parent Molecules, Nitrogen, Hydrogen, Bennett, Ammonia, Distribution

Scientific paper

The authors present photodissociation rates of NH by absorption of solar radiation into the υarcmin = 2 level of the A3Πi state as a function of radial velocity for a comet at a heliocentric distance of 1 AU. The photodissociation of NH results in velocity distributions of about 1 km s-1 and 15 km s-1 for nitrogen and hydrogen atoms, respectively, with respect to NH. By comparing the convolution model lifetime of the NH parent for comet Bennett (1970 II) with the photochemical lifetime of NH3 against solar photon flux at 1 AU the authors infer that NH3 is probably the parent of NH radical observed in comets.

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