Line shapes of the Na/K resonance line profiles perturbed by H2 at extreme density

Open Access

Fig. 1

Absorption cross section, σ, of the D2 component of the resonance lines of Na (blue curve) and K (red curve) perturbed by H₂ collisions at T = 1000 K and $n_{H_{2}} = 10^{22} {cm}^{- 3}$ ${n_{{{\rm{H}}_2}}} = {10^{22}}\,{\rm{c}}{{\rm{m}}^{ - 3}}$ . The Lorentzian approximation is overplotted for comparison (dashed curves).

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