Temperature Dependences of the Quantum-Mechanical and Semi-Classical Spectral-Line Widths and the Separation 𝑛₀ of the Impact and Non-Impact Regions for an Ar-Perturbed/K-Radiator System

Figure 3

This plot shows a set of three QM log(𝑤)—versus—log(𝑛) curves in the non-impact region (large 𝑛) at temperatures: 𝑇=400 K (empty circles), 𝑇=800 K (empty squares), and 𝑇=1000 K (empty triangles). A similar set appears in the impact region (small 𝑛): 𝑇=400 K (filled circles), 𝑇=800 K (filled squares), and 𝑇=1000 K (filled triangles). The dotted lines are extrapolations from the non-impact-region QM curves; and they intersect the corresponding impact-region curves at 𝑛₀'s.