Dose Buildup Factors of Plane Parallel Barriers for ⁶⁰Co Plane Monodirectional Source

Dose buildup factors for a plane monodirectional source of ⁶⁰Co were obtained experimentally for plane parallel barriers composed, respectively, of water, graphite, ordinary glass, aluminum, ordinary concrete, heavy concrete, iron, and lead. For water, aluminum, ordinary concrete, iron, and lead, comparisons were made between the experimental and the theoretical values that were calculated by a method to obtain dose buildup factors of finite barriers. The results showed these values to be in good agreement for all materials except water. For water, further calculation by the Monte Carlo method supported the theoretical value.