Dicarbon formation in collisions of two carbon atoms

James Babb, Ryan Smyth, Brendan McLaughlin

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)
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Abstract

Radiative association cross sections and rates are computed, using a quantum approach, for the formation of C2 molecules (dicarbon) during the collision of two ground state C(3P) atoms. We find that transitions originating in the C 1Πg, d 3Πg, and 15Πu states are the main contributors to the process. The results are compared and contrasted with previous results obtained from a semi-classical approximation. New ab initio potential curves and transition dipole moment functions have been obtained for the present work using the multi-reference configuration interaction approach with the Davidson correction (MRCI+Q) and aug-cc-pCV5Z basis sets, substantially increasing the available molecular data on dicarbon. Applications of the current computations to various astrophysical environments and laboratory studies are briefly discussed focusing on these rates.
Original languageEnglish
Number of pages9
JournalThe Astrophysical Journal
Volume876
Issue number1
DOIs
Publication statusPublished - 30 Apr 2019

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