NASA NTRS · 19810053470
Observationally determined silicon II oscillator strengths
Abstract
Si II oscillator strengths for eight resonance lines from the ground state have been determined using a curve-of-growth analysis of interstellar data from the Copernicus and International Ultraviolet Explorer satellites. The oscillator strengths for 1526 A and 1808 A increase by factors of 3.0 and 1.5, respectively, from previously tabulated values; those for 989 A and 1020 A decrease by factors of 0.55 and 0.60, respectively. These new values result in better silicon abundances for interstellar clouds and resolve a long-standing puzzle in the interpretation of quasar absorption line data.
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Shull, J. M., York, D. G., Snow, T. P., Jr.. 1981-06-01. Observationally determined silicon II oscillator strengths. https://ntrs.nasa.gov/citations/19810053470
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