Atomic Transition Probabilities for Neutral Cerium

Details Atomic Transition Probabilities for Neutral Cerium Atomic Transition Probabilities for Neutral Cerium

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21547609c&link_type=abstract

American Astronomical Society, AAS Meeting #215, #476.09; Bulletin of the American Astronomical Society, Vol. 42, p.525

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Among the rare earth species, the spectra of neutral cerium (Ce I) and singly ionized cerium (Ce II) are some of the most complex. Like other rare earth species, Ce has many lines in the visible which are suitable for elemental abundance studies. Recent work on Ce II transition probabilities [1] is now being augmented with similar work on Ce I for future studies using such lines from astrophysical sources. Radiative lifetimes from laser induced fluorescence measurements [2] on neutral Ce are being combined with emission branching fractions from spectra recorded using a Fourier transform spectrometer. A total of 14 high resolution spectra are being analyzed to determine branching fractions for 2500 to 3000 lines from 153 upper levels in neutral Ce. Representative data samples and progress to date will be presented.
This work was supported by the National Science Foundation's REU
program and the Department of Defense's ASSURE program through NSF Award AST-0453442 and NSF Grant CTS0613277.
[1] J. E. Lawler, C. Sneden, J. J. Cowan, I. I. Ivans, and E. A. Den Hartog, Astrophys. J. Suppl. Ser. 182, 51-79 (2009).
[2] E. A. Den Hartog, K. P. Buettner, and J. E. Lawler, J. Phys. B: Atomic, Molecular & Optical Physics 42, 085006 (7pp) (2009).

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