Photodissociation lifetime of (S-32)2 molecule in comets

Details Photodissociation lifetime of (S-32)2 molecule in comets Photodissociation lifetime of (S-32)2 molecule in comets

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986em%26p...36..117d&link_type=abstract

Earth, Moon, and Planets (ISSN 0167-9295), vol. 36, Oct. 1986, p. 117-125.

Computer Science

13

Cometary Atmospheres, Photochemical Reactions, Photodissociation, Sulfur, Coma, Forbidden Transitions, Sunlight, Velocity Distribution

Scientific paper

Photodissociation lifetime of (C-32)2 in comets is calculated by absorption of solar photons into the B3Sigma-state, and velocity distributions of sulphur atoms are determined. Absorption of solar photons of wavelengths about 280 nm leads to a photodissociation lifetime of about 250 s for (S-32)2 molecule in comets when sun-comet distance is 1 AU. Forbidden lines corresponding to 1D-3P transitions of neutral sulphur atom may be detectable at about 11,306 and 10,821 A in comets. The production rate of (S-32)2 dimer in comet IRAS-Araki-Alcock 1983d compares well with the production rate of CS, observed in comet Bradfield, when compared at the same heliocentric distance. The chemistry of (S-32)2 dimer formation in the inner coma of a comet is discussed in the framework of some gas phase reactions.

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