Variation of transmitted particle flux with strength of forward and backward scattering in deep penetration problems

The flux of particles in a slab of finite thickness with a radiation source at one of its surfaces has been studied. Strong forward–backward scattering in combination with linearly anisotropic scattering has been assumed. It is found that the variation of the transmitted flux with the strength of backscattering is sometimes non-uniform. A comparison is made with Rutherford scattering, where the same behaviour is observed.