Question

Diffusion length for inelastic scattering

Answer 1

During solution of the diffusion equation we often meet with very important parameter that describes behavior of neutrons in a medium.

The solution of diffusion equation (let assume the simplest diffusion equation) usually starts by division of entire equation by diffusion coefficient:

The term L2 is called the diffusion area (and L called the diffusion length). For thermal neutrons with an energy of 0.025 eV a few values of L are given in table below.