Fine-structure population ratios for the 3P ground state of C I

Details Fine-structure population ratios for the 3P ground state of C I Fine-structure population ratios for the 3P ground state of C I

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...339..591k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 339, April 1, 1989, p. 591-594. Research supported by SERC.

Astronomy and Astrophysics

Astrophysics

14

Atomic Theory, Carbon, Electron Transitions, Fine Structure, Ground State, Atomic Excitations, Electron Impact, Ultraviolet Spectra

Scientific paper

Results of recent R-matrix calculations of electron impact excitation rates for the 2s2 2p2 3Pj-2s2 2p2 3Pj, fine-structure transition in C I are used to derive density sensitive population ratios n(3P1)/n(3Po) and n(3P2)/n(3Po) for a range of temperatures and electron and neutral hydrogen densities. The present data differ appreciably from those of Smeding and Pottasch (1979) and illustrate the importance of adopting accurate electron excitation rates in population ratio calculations, even in the case of neutrals.

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