|In any practical application, a detector used for gamma-ray
will be surrounded by other materials which contribute to its response. These materials
are potential sources of secondary radiation, produced via interactions of the
gamma-ray photons emitted from the source. The contributions arise from:
- Photoelectric absorption;
- Compton scattering; and
- Pair production in the surrounding material.
If the secondary radiations reach the detector they can influence the shape of the
recorded spectrum to a noticeable extent.
This section contains the following topics:
Interactions in shielding
Pair production in shielding
Real size detectors