29. A shielded vial with a 0.1-mm thick lead shield contains 11. ThisA. 8 mR/hrB. 1 mR/hrshielded sample yields an exposure rate of 0.25 mR/hr at adistance of 3 cm. What will the exposure rate be at the samedistance when the shield is removed? (The lead HVL for 125I isC. 0.5 mR/hrD. 0.25 mR/hr0.02 mm.)30. A shielded vial with a 4.0-mm thick lead shield contains "F. Thisshielded sample yields an exposure rate of 6 mR/hr at a distanceof 1 cm. What will the exposure rate be at the same distancewhen the shield is removed? (The lead HVL for F is 4.0 mm.)A. 12 mR/hrB. 6 mR/hrC. 3 mR/hrD. 1.5 mR/hr

29 Given: The thickness of the lead is t=0.1 mm. The exposure rate with a shield at a distance of 3…

29. A shielded vial with a 0.1-mm thick lead shield contains 1. This shielded sample yields an exposure rate of 0.25 mR/hr at a distance of 3 cm. What will the exposure rate be at the same distance when the shield is removed? (The lead HVL for 1I is A. 8 mR/hr B. 1 mR/hr C. 0.5 mR/hr D. 0.25 mR/hr 0.02 mm.) 30. A shielded vial with a 4.0-mm thick lead shield contains "F. This shielded sample yields an exposure rate of 6 mR/hr at a distance of 1 cm. What will the exposure rate be at the same distance when the shield is removed? (The lead HVL for "F is 4.0 mm.) A. 12 mR/hr B. 6 mR/hr C. 3 mR/hr D. 1.5 mR/hr

29. A shielded vial with a 0.1-mm thick lead shield contains 1. This shielded sample yields an exposure rate of 0.25 mR/hr at a distance of 3 cm. What will the exposure rate be at the same distance when the shield is removed? (The lead HVL for 1I is A. 8 mR/hr B. 1 mR/hr C. 0.5 mR/hr D. 0.25 mR/hr 0.02 mm.) 30. A shielded vial with a 4.0-mm thick lead shield contains "F. This shielded sample yields an exposure rate of 6 mR/hr at a distance of 1 cm. What will the exposure rate be at the same distance when the shield is removed? (The lead HVL for "F is 4.0 mm.) A. 12 mR/hr B. 6 mR/hr C. 3 mR/hr D. 1.5 mR/hr

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