Total Cross-section

In general, nuclear cross-sections can be measured for all possible interaction processes together. In this case they are called total cross-sections (σ_t). The total cross-section is the sum of all the partial cross-sections such as:

elastic scattering cross-section (σ_s)
inelastic scattering cross-section (σ_i)
absorption cross-section (σ_a)
radiative capture cross-section (σ_γ)
fission cross-section (σ_f)

σ_t = σ_s + σ_i + σ_γ + σ_f + ……

The total cross-section measures the probability that an interaction of any type will occur when neutron interacts with a target.

Uranium 238. Neutron absorption and scattering. Comparison of cross-sections.

Uranium 238. Comparison of cross-sections.Source: JANIS (Java-based Nuclear Data Information Software); The JEFF-3.1.1 Nuclear Data Library

Hydrogen. Neutron absorption and scattering. Comparison of cross-sections.Source: JANIS (Java-based Nuclear Data Information Software); The JEFF-3.1.1 Nuclear Data Library

Xenon – 135. Neutron absorption and scattering. Comparison of cross-sections.Source: JANIS (Java-based Nuclear Data Information Software); The JEFF-3.1.1 Nuclear Data Library

See previous:

See above:

Neutron Cross-section