Direct measurement of fine structure in the ground state of atomic carbon by laser magnetic resonance

Details Direct measurement of fine structure in the ground state of atomic carbon by laser magnetic resonance Direct measurement of fine structure in the ground state of atomic carbon by laser magnetic resonance

Jun 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...238l.107s&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 238, June 1, 1980, p. L107-L111.

Astronomy and Astrophysics

Astrophysics

31

Carbon Isotopes, Fine Structure, Infrared Spectra, Interstellar Matter, Laser Spectroscopy, Optical Emission Spectroscopy, Abundance, Atomic Energy Levels, Far Infrared Radiation, Fluorine, Ground State, Line Spectra, Magnetic Resonance, Methane, Zeeman Effect

Scientific paper

Laser magnetic resonance measurements of fine-structure intervals in the ground state of atomic carbon, which have made possible the detection of far infrared line emissions from C-12 in several interstellar sources, are reported. The 3P0 to 3P1 and 3P1 to 3P2 transitions in C-12 and C-13 atoms in a methane-fluorine atom flame were observed at 10 different optically pumped far infrared laser lines, and the C-12 fine structure intervals were determined from the combined data of all 10 lines and g-factors from the atomic beam experiments of Wolber et al. (1970). Interval spacings of 809.3446 (29) and 492.1623 (7) GHz are obtained for the 3P0-3P1 and 3P1-3P2 transitions, respectively. It is pointed out that the further detection of these transitions should lead to information regarding atomic abundances, isotope ratios, chemical fractionation effects, processes involving interstellar dust grains and the physical conditions of the interstellar medium

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