Improved Laboratory Transition Probabilities for Pt I and Application to the Platinum Abundances of BD +17°3248 and the Sun

Details Improved Laboratory Transition Probabilities for Pt I and Application to the Platinum Abundances of BD +17°3248 and the Sun Improved Laboratory Transition Probabilities for Pt I and Application to the Platinum Abundances of BD +17°3248 and the Sun

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005apj...619..639d&link_type=abstract

The Astrophysical Journal, Volume 619, Issue 1, pp. 639-655.

Astronomy and Astrophysics

Astronomy

23

Atomic Data, Stars: Abundances, Sun: Abundances

Scientific paper

Radiative lifetimes, accurate to +/-5%, have been measured for 58 odd-parity levels of Pt I using laser-induced fluorescence. The lifetimes were combined with branching fractions measured using grating and Fourier transform spectrometry to determine transition probabilities for 127 lines of Pt I. The new Pt lifetime measurements were found to be in good agreement with previous but less extensive measurements based on laser-induced fluorescence. The new branching fraction measurements were found to be in fair agreement with one earlier study. Absolute atomic transition probabilities from the new measurements were used to determine the platinum abundance in the metal-poor Galactic halo star BD +17°3248. An attempt to refine the solar photospheric abundance of platinum was unsuccessful; the single Pt I line used in an earlier abundance determination was found to be even more severely blended than expected from earlier work.

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