Fig. 9
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Variation with temperature of the broadening rate (w/nHe) of the 4P3/2–4s (solid line) and 4P1/2–4s (dashed line) resonance lines of K perturbed by He collisions. A comparison is made with Pascale (1983) (blue circle) and van der Waals (dotted black line). The rates are in units of 10−20 cm−1/cm−3.
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