Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-01-20
Astrophys.J. 584 (2003) L107
Astronomy and Astrophysics
Astrophysics
Accepted for publication in ApJLetters
Scientific paper
10.1086/374037
We have measured the oscillator strength of the Ni I line at 6300.34 \AA, which is known to be blended with the forbidden [O I] $\lambda$6300 line, used for determination of the oxygen abundance in cool stars. We give also wavelengths of the two isotopic line components of $^{58}$Ni and $^{60}$Ni derived from the asymmetric laboratory line profile. These two line components of Ni I have to be considered when calculating a line profile of the 6300 \AA\ feature observed in stellar and solar spectra. We also discuss the labelling of the energy levels involved in the Ni I line, as level mixing makes the theoretical predictions uncertain.
Johansson Sara
Litzén Ulf
Lundberg Hans
Zhang Zhongsheng
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