A Novel and High-Precision Method for Calculating the γ-Ray Build-Up Factor for Multilayer Shields

Figure 8

The comparison of build-up factor between actual target and predicted target: The comparison for (a) single-layer shields of aluminum at different incident photon energy, (b) double-layer shields at 0.8 MeV γ-ray energy, (c) triple-layer shields at 2 MeV γ-ray energy, and (d) quadruple-layer shields at 6 MeV γ-ray energy.

(a)

(b)

(c)

(d)