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Table 1:

Atomic data for the Fe I 630 nm lines.

$\lambda_{0}$ (nm)
$\chi$ (eV) $\log gf$ TRANSITION $\alpha/a^2_0$ $\sigma$ $g_{\rm eff}$
630.1501 3.654 -0.75 5P2-5D2 0.243 840.5 1.67
630.2494 3.686 -1.236 5P1-5D0 0.240 856.8 2.5

Notes. Shown are the central wavelength of the transition, $\lambda_{0}$, the excitation potential of the lower atomic level, $\chi$, the multiplicity of the lower level times the oscillator strength, $\log gf$, the collisional broadening parameters, $\alpha$ and $\sigma$ (in units of Bohr's radius a0), and the effective Landé factor of the line, $g_{\rm eff}$. The $\log gf$values have been derived from a fit to the solar spectrum using a two-component model of the quiet Sun (Borrero & Bellot Rubio 2002).

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