Solar Abundance of Iridium

Details Solar Abundance of Iridium Solar Abundance of Iridium

Feb 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976pnas...73..269d&link_type=abstract

Proceedings of the National Academy of Sciences of the United States of America, Volume 73, Issue 2, pp. 269-270

Physics

6

Scientific paper

By a method of spectrum synthesis, which yields log gfA, where g is the statistical weight of the lower level, f is the oscillator strength, and A is the abundance, an attempt is made to deduce the solar iridium abundance from one relatively unblended, but fairly weak IrI line, λ 3220.78 angstrom. If the Corliss-Bozman f-value for this line is adopted, we find log A(Ir) = 0.82 on the scale log A(H) = 12.00. The discordance with the value found from carbonaceous chondrites may arise from faulty f-values or from difficulties arising from line blending in this far ultraviolet domain of the solar spectrum.

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