Photopolymerization and Mass-Independent Sulfur Isotope Fractionations in Carbon Disulfide

Details Photopolymerization and Mass-Independent Sulfur Isotope Fractionations in Carbon Disulfide Photopolymerization and Mass-Independent Sulfur Isotope Fractionations in Carbon Disulfide

Aug 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996sci...273..774c&link_type=abstract

Science, Volume 273, Issue 5276, pp. 774-776

Computer Science

22

Scientific paper

Irradiation of gaseous carbon disulfide [CS2(g)] at 313 nanometers produces a dark brown aerosol of (CS_2)_x. Its thermal decomposition products include disulfur (S_2), carbon monosulfide (CS), and (CS)_x. The photopolymerization process is accompanied by a large mass-independent isotopic fractionation of sulfur (a 5 to 10 per mil sulfur-33 excess and a 61 to 84 per mil sulfur-36 deficit). Excess sulfur-33 has been observed in several classes of meteorites. Photochemical production of (CS_2)_x may be important in the origin and evolution of cosmochemical environments such as the presolar nebula, meteorites, asteroids, and planetary atmospheres.

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