If a technologist is standing 1 foot from the source and is receiving

Question Answered step-by-step If a technologist is standing 1 foot from the source and is receiving12.5 mR/h, what distance do they have to stand to bring down their exposure to 4mR/hr? The HVL of graphite for Iodine 123 is 0.4 cm. A graphite wall needs to block most of the photons, allowing only 6.25% of the photons to pass through the wall. How thick does the graphite wall need to be?   Health Science Science Nursing NURSING 220 Share QuestionEmailCopy link Comments (0)