treams.TMatrix.xs_ext_avg¶

property TMatrix.xs_ext_avg¶

Rotation and polarization averaged extinction cross section.

The average is calculated as

\[\langle \sigma_\mathrm{ext} \rangle = -2 \pi \sum_{slm} \frac{\Re(T_{slm,slm})}{k_s^2}\]

where \(k_s\) is the wave number in the embedding medium for the polarization \(s\). It is only implemented for global T-matrices.