New atomic data for the thorium-neodymium stellar chronometer

Astronomy and Astrophysics – Astronomy

Scientific paper

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Atomic Data, Line: Identification, Line: Profiles

Scientific paper

New measurements of the CoI and VI lines blended with the thorium 4019-A line used in the thorium-neodymium stellar chronometer have been made using a Fourier transform spectrometer. The hyperfine structure of the CoI transitions and the gf value of the VI line have been determined together with high-precision measurements of transition wavelengths. We also report on the hyperfine structure of the CoI line blended with the thorium line at 4086A, an alternative to the Th 4019-A line.

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