Question #5 A compact x-ray set is used only for x-ray fluorescence analysis. It has a maximum accelerating voltage of 50k V and a maximum current of ImA. Assume that the usage factor is I and the occupancy factor is 1. How far away would a radiation worker (P 0.1 R wk ') have to be for no shielding to be needed? Assume that the x-ray set is run for 40 hours per week. Assume that no shielding is required if K=1. What thickness of lead shielding is required to be installed at 0.5m from the x-ray set to provide adequate shielding? Assume the maximum exposure rate allowed for a radiation worker, that both usage and occupancy factors are equal to I and that the x-ray set is used for 40 hours per week