Physics – Chemical Physics
Scientific paper
Sep 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jchph..87.2847o&link_type=abstract
Journal of Chemical Physics (ISSN 0021-9606), vol. 87, Sept. 1, 1987, p. 2847-2853. Research supported by the Fonds der Chemisch
Physics
Chemical Physics
20
Carbon, Molecular Orbitals, Radiative Lifetime, Interstellar Chemistry, Quadrupoles, Wave Functions, Wave Interaction
Scientific paper
The suitability of the C2 molecule as an astrophysical probe of atomic abundances and stellar temperatures has prompted a number of experimental and theoretical studies to determine oscillator strengths and radiative lifetimes of the low-energy electronic states. Here, ab initio potential curves of A 1Pi(u) and X 1Sigma(g)+ states of C2 are reported along with A-X radiative lifetimes. The lifetimes for (J-prime = 1,v-prime) A 1Pi(u) are calculated to be about 25 percent longer than those found in previous ab initio studies, but about 25 percent shorter than the most recent laser-induced fluorescence measurements. The quadrupole moments of the A 1Pi(u) and X 1Sigma(g)+ states as a function of internuclear distance and the quadrupole lifetimes of several (v-prime = 0,J-prime) levels in the X state are also reported.
Oneil S. V.
Rosmus P.
Werner H.-J.
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