Photon Production Self-Shielding

Photons are produced by capture and fission, and both reactions usually show significant self-shielding in resonance energy ranges. Although the MATXS format has the capability of storing shielded cross sections for any photon production cross section, the current libraries contain only infinite-dilution photon matrices, and TRANSX uses shielding factors for the corresponding neutron reaction to self-shield each photon production matrix.

TRANSX HyperText Manual
TRANSX HyperText Help Package
T-2 Nuclear Information Service