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Experimental [CLC][ITAL]f[/ITAL][/CLC]-Value and Isotopic Structure for the N[CLC]i[/CLC] [CSC]i[/CSC] Line Blended with [O [CSC]i[/CSC]] at 6300 Å

2003; IOP Publishing; Volume: 584; Issue: 2 Linguagem: Inglês

10.1086/374037

1538-4357

Sveneric Johansson, Ulf Litzén, H. Lundberg, Z. Zhang,

Astro and Planetary Science

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.