1. The linear absorption coefficients for 60Co and 99mTc y rays (E= 1.25 and 0.140 MeV, respectively) in lead are approximately 0.70 cm³¹ and 25 cm³¹, respectively. a. What is the half-value layer (HVL) of each y ray in lead? b. What is the mean free path of each y ray in lead? C. How many cm or mm of lead are required to reduce the initial intensity of y rays emitted from these two sources by 99%? d. Approximately how many half-value layers (HVLS) is this? 2. The LET of a 1-MeV proton in water is 44 keV/μm. a. b. ن فنه C. Calculate the range of this proton in water. Estimate the LET of a 1-MeV tritium particle (3₁H+¹) in water. Estimate the LET of a 1-MeV 32 He+2 particle in water.

1. The linear absorption coefficients for 60Co and 99mTc y rays (E= 1.25 and 0.140 MeV, respectively) in lead are approximately 0.70 cm³¹ and 25 cm³¹, respectively. a. What is the half-value layer (HVL) of each y ray in lead? b. What is the mean free path of each y ray in lead? C. How many cm or mm of lead are required to reduce the initial intensity of y rays emitted from these two sources by 99%? d. Approximately how many half-value layers (HVLS) is this? 2. The LET of a 1-MeV proton in water is 44 keV/μm. a. b. ن فنه C. Calculate the range of this proton in water. Estimate the LET of a 1-MeV tritium particle (3₁H+¹) in water. Estimate the LET of a 1-MeV 32 He+2 particle in water.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter20: The Representative Elements

Section: Chapter Questions

Problem 80AE: The inert-pair effect is sometimes used to explain the tendency of heavier members of Group 3A (13)...

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