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A. 1.5 R/hr 48. Calculate the exposure rate at 3.0 cm from a I source with an activity of 2.0 mCi. The gamma factor of 1I is 2.27 R-cm/mCi-hr. B. 0.50 R/hr C. 7.9 R/hr D. 10.2 R/hr

A. 1.5 R/hr 48. Calculate the exposure rate at 3.0 cm from a I source with an activity of 2.0 mCi. The gamma factor of 1I is 2.27 R-cm/mCi-hr. B. 0.50 R/hr C. 7.9 R/hr D. 10.2 R/hr

Chemistry: The Molecular Science
Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter18: Nuclear Chemistry
Section18.8: Nuclear Radiation: Effects And Units
Problem 18.13E
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48. Calculate the exposure rate at 3.0 cm from a I source with an activity of 2.0 mCi. The gamma factor of 1'I is 2.27 R-cm/mCi-hr. A. 1.5 R/hr В. 0.50 R/hr C. 7.9 R/hr D. 10.2 R/hr A. 9.1 mCi В. 9.1 Ci C. 9.1×10° Ci D. 9.1x10° mCi 49. Co-60 gives an exposure rate of 12.87 R/hr from 1 mCi at 1 cm. At a distance of 15 cm from a Co-60 source, the exposure rate is 520 mR/hr. What is the activity of this source? 50. A PET technologist works for 10 minutes at a distance of 0.5 m from a patient who was injected with 780 µCi of "F, which has a specific gamma factor of 5.73 R•cm²/mCi-hr. What was the exposure to this technologist? A. 0.3 R В. 0.3 mR C. 1.8 mR D. 1.8 R
Transcribed Image Text:48. Calculate the exposure rate at 3.0 cm from a I source with an activity of 2.0 mCi. The gamma factor of 1'I is 2.27 R-cm/mCi-hr. A. 1.5 R/hr В. 0.50 R/hr C. 7.9 R/hr D. 10.2 R/hr A. 9.1 mCi В. 9.1 Ci C. 9.1×10° Ci D. 9.1x10° mCi 49. Co-60 gives an exposure rate of 12.87 R/hr from 1 mCi at 1 cm. At a distance of 15 cm from a Co-60 source, the exposure rate is 520 mR/hr. What is the activity of this source? 50. A PET technologist works for 10 minutes at a distance of 0.5 m from a patient who was injected with 780 µCi of "F, which has a specific gamma factor of 5.73 R•cm²/mCi-hr. What was the exposure to this technologist? A. 0.3 R В. 0.3 mR C. 1.8 mR D. 1.8 R
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