Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...253..983e&link_type=abstract
Astrophysical Journal, Part 1, vol. 253, Feb. 15, 1982, p. 983-988. Research supported by the Robert A. Welch Foundation, Unive
Astronomy and Astrophysics
Astrophysics
32
Astronomical Spectroscopy, Carbon, Interstellar Gas, Molecular Spectroscopy, Radiative Lifetime, Spectral Bands, Emission Spectra, Molecular Oscillations, Transition Probabilities
Scientific paper
The high frequency deflection technique is used to measure radiative lifetimes of vibrational levels of the C2 A 1Pi u state. The mean lifetime for levels v-prime = 3, 4, 6, and 7 is found to be 11 microseconds, and results are used to derive absorption oscillation strengths of the Phillips (A 1Pi u-X1Sigma g +) system. The f-values for the infrared band which correspond to those for the near infrared bands are subject to larger uncertainty, due to the lack of information on the R e 2 variation at large internuclear separations, and the R e 2 model can be better defined by extending the lifetime results to both the lower (v-prime not greater than 2) and higher (v-prime not less than 8) levels.
Erman Peter
Lambert David L.
Larsson Martin
Mannfors B.
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