Table 1.
Atomic parameters of the spectral lines analysed in this work.
| Ion | λ0 | χlow | log(gf) | Elec.conf | σ | α | geff | Glin |
|---|---|---|---|---|---|---|---|---|
| [nm] | [eV] | |||||||
| Mg I | 517.26843 | 2.711 | −0.393 | 3P1 − 3P1 | 729 | 0.238 | 1.5 | 2.25 |
| Na I | 589.59242 | 0.000 | −0.194 | 2S1/2 − 2P1/2 | 407 | 0.273 | 1.33 | 2.22 |
| Fe I | 630.24936 | 3.686 | −1.235 | 5P1 − 5D0 | 856 | 0.240 | 2.5 | 10.62 |
| Ca II | 854.20900 | 1.700 | −0.360 | 2D5/2 − 2P3/2 | 291 | 0.275 | 1.10 | 1.27 |
Notes. λ0 represents the central laboratory wavelength of the spectral line. σ and α represent the cross-section (in units of Bohr’s radius squared a02) and velocity parameter of the atom undergoing the transition, respectively, for collisions with neutral atoms under the ABO theory (Anstee & O’Mara 1995; Barklem & O’Mara 1997; Barklem et al. 1998). The effective Landé factor geff has been calculated under the assumption of LS coupling. The Landé factor for the linear polarization Glin has been calculated according to Landi Degl’Innocenti (1992).
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