Lifetime Measurements of the E 1 Pi , V = 0 and V = 1 States of 12C 16O, 13C 16O, and 13C 18O

Details Lifetime Measurements of the E 1 Pi , V = 0 and V = 1 States of 12C 16O, 13C 16O, and 13C 18O Lifetime Measurements of the E 1 Pi , V = 0 and V = 1 States of 12C 16O, 13C 16O, and 13C 18O

Jun 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998apj...499l.223c&link_type=abstract

Astrophysical Journal Letters v.499, p.L223

Astronomy and Astrophysics

Astronomy

18

Ism: Molecules, Molecular Data, Techniques: Spectroscopic

Scientific paper

In a laboratory investigation using tunable picosecond lasers in a pump-probe configuration, lifetimes of the E 1 Pi , v=0 and v=1 states of CO are experimentally determined. For E 1 Pi , v=1 , the lifetime is found to vary significantly for the isotopomers. Combining the data with existing oscillator strengths, predissociation probabilities within the range of 93.6%-98.6% result for 12 C 16 O, 13 C 16 O, and 13 C 18 O in the case of the E 1 Pi , v=1 state, which is the state that predominantly influences the isotopic fractionation of CO in interstellar clouds.

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