Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008apj...686..379b&link_type=abstract
The Astrophysical Journal, Volume 686, Issue 1, pp. 379-383.
Astronomy and Astrophysics
Astronomy
2
Astrochemistry, Infrared: Ism, Ism: Molecules, Molecular Data
Scientific paper
The low-temperature rotational (de-) excitation of C3 (X1Σ+g) by collisions with He (1S) is studied using an ab initio potential energy surface (PES). This PES has been calculated using the single- and double-excitation coupled-cluster approach with noniterative perturbational treatment of triple excitations [CCSD(T)] and the augmented correlation-consistent triple-ζ basis set (aug-cc-pVTZ) with bond functions. This PES is then incorporated in full close-coupling quantum scattering calculations for collision energies between 0.1 and 50 cm-1 in order to deduce the rate constants for rotational levels of C3 up to j=10, covering the temperature range 5-15 K.
Abdallah Ben D.
Ben Lakhdar Z.
Chambaud G.
Hammami Kamel
Hochlaf M.
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