Figure 7
From: General considerations for effective thermal neutron shielding in detector applications
Geometry used for simulations, showing the shielding material (green “coin”), incident neutrons (red line), transmission detector (orange half sphere), and albedo detector (blue half sphere). In the left figure, the albedo detector is transparent to show the incident neutrons and shielding material, while in the right figure, both the albedo and transmission detectors are seen fully encapsulating the shielding material and incident neutrons