Oscillator strength measurements in the vacuum-ultraviolet. II - The strong 1260, 1277, 1329, 1463, 1561, and 1657 A multiplets of neutral carbon

Details Oscillator strength measurements in the vacuum-ultraviolet. II - The strong 1260, 1277, 1329, 1463, 1561, and 1657 A multiplets of neutral carbon Oscillator strength measurements in the vacuum-ultraviolet. II - The strong 1260, 1277, 1329, 1463, 1561, and 1657 A multiplets of neutral carbon

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...181..203g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 181, no. 1, July 1987, p. 203-209.

Astronomy and Astrophysics

Astrophysics

26

Astronomical Spectroscopy, Carbon, Far Ultraviolet Radiation, Fine Structure, Neutral Atoms, Oscillator Strengths, Atomic Interactions, Cometary Atmospheres, Cool Stars, Error Analysis, Interstellar Matter, Solar Atmosphere

Scientific paper

A wall-stabilized arc is presently used to measure the oscillator strengths, in emission, of the 23 neutral carbon lines belonging to the strong vacuum-UV multiplets at 1261, 1277, 1329, 1463, 1561, and 1657 A. After deriving optical depth profiles, the measured relative oscillator strengths are normalized to an absolute scale that is set by lifetime measurements. All of the lines investigated can be saturated by increasing the carbon concentration. Digital data processing allows the separation of overlapping lines within the multiplets; the uncertainty of the oscillator strength values is of the order of + or - 10-15 percent. With the exception of the 1329 A multiplet, the agreement achieved with the theoretical values of Nussbaumer and Storey (1984) lies within 5 percent.

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