Lorentz line shape
= Lorentz line shape
{c}
{title2=$\kappa_\nu=\frac S\pi\frac\Delta{(\nu-\nu_0)^2+\Delta^2}$}
A normalized collisional line model $\kappa_\nu=(S/\pi)\Delta/[(\nu-\nu_0)^2+\Delta^2]$, with integrated strength $S$ and half-width $\Delta$. The centre scales as $S/\Delta$ and far wings as $S\Delta/(\nu-\nu_0)^2$. In a dilute pressure-broadened gas $\Delta$ scales approximately with <pressure>.