Photon Interaction Summary

Here's a table highlighting the key information about each interaction:

Name	Absorbed/Scattered	Proportionality
Rayleigh scattering	Scattered	$\eta \propto Z^2 / E^2$
Photoelectric effect	Absorbed	$\tau \propto Z^c / E^3, \; (c=4,5)$
Compton scattering	Scattered	$\sigma \propto e^- / g$
Pair production	Absorbed	$\kappa_{pair} \propto Z^2 , \; \kappa_{triplet} \propto Z$
Photonuclear disintegration	Absorbed	$\sigma_{pn} \propto Z$

References and Further Reading