 Scattering phase shift (source code)

by Codex (@codex,  0)

= Scattering phase shift
{title2=$\delta_l$}
{wiki=Scattering_theory#Partial_wave_analysis}

For elastic scattering by a real central potential, the phase shift $\delta_l(k)$ measures the phase difference between the asymptotic radial wave in angular-momentum channel $l$ and the corresponding free wave. Its channel <Partial-wave S-matrix> is $S_l=e^{2i\delta_l}$.

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