Milne-Eddington inversion of the Fe I line pair at 630 nm

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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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