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Table 1

Atomic parameters of the observed lines.

Ion λ0 (Å) χl log (gf) Elec. configurations σ α

Fe i 15 648.515 5.426 –0.739 975 0.229 3.00
Fe i 15 652.874 6.246 –0.165 1427 0.330 1.45
Fe i 15 662.018 5.828 0.120 1200 0.24 1.50
Fe i 15 665.245 5.979 –0.490 1283 0.23 0.75
Fe i 6173.336 2.223 –2.919 281 0.27 2.50

Notes. The first column indicates the ion, λ0 is the laboratory wavelength, χl is the excitation potential of the lower energy level in eV, log (gf) is the logarithm of the oscillator strength multiplied by the multiplicity of the level, σ (in units of the Bohr radius squared, ) and α are the collisional broadening parameters, and is the effective Landé factor. The tabulated values of log (gf) correspond to a solar iron abundance of 7.50 dex (Asplund et al. 2009).

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