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
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text: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?
Transcribed Image Text: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.
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