The classes in package janus.format.endf.data.energyangledistribub represent a collection of distributions. There is one distribution for each reaction product. This information is imported from FILE 6 in ENDF format. FILE 6 includes neutrons, photons, charged particles, and residual nuclei. The classes in this package are used when the energy and angular distributions of the emitted particles must be coupled for giving a concurrent description of neutron scattering and particle emission.
A reaction is defined by giving the production cross-section for each reaction product in barns/steradian assuming azimuthal symmetry:
σi(μ,E,E’) = σ(E) yi(E) fi(μ,E,E’)/2π
where i denotes one particular product
E is the incident energy
E’ is the energy of the product emitted with cosine μ
σ(E) is the interaction cross-section
yi(E) is the product yield or multiplicity, and
fi is the normalized distribution with units (eV-unit cosine)-1