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Fig. 7
Variation of the absorption cross-section in the central part of the sum of the components P3 / 2 and P1 / 2 with the He density, (from top to bottom nHe = 1, 2 and, 3 × 1021 cm-3, T = 8000 K). The corresponding sum of Lorentzian profiles for nHe = 1 and, 2 × 1021 cm-3 is overplotted (blue lines).
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