For pair production to take place, the threshold energy of the incident photon must be: a. Equal to 0.51 MeV b. Greater than 1.02 MeV C. Greater than 2.04 MeV d. Less than 1.02 MeV Which of the following absorbed doses would be the most damaging to organs or tissues? a. 5mGy from 5MeV a - particles b. 5mGy from 6MeV electrons C. 5mGy from 50keV x-rays d. 5mGy from 10keV neutrons
For pair production to take place, the threshold energy of the incident photon must be: a. Equal to 0.51 MeV b. Greater than 1.02 MeV C. Greater than 2.04 MeV d. Less than 1.02 MeV Which of the following absorbed doses would be the most damaging to organs or tissues? a. 5mGy from 5MeV a - particles b. 5mGy from 6MeV electrons C. 5mGy from 50keV x-rays d. 5mGy from 10keV neutrons
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Transcribed Image Text:For pair production to take place, the threshold energy of the incident photon must be:
a. Equal to 0.51 MeV
b.
Greater than 1.02 MeV
C. Greater than 2.04 MeV
d.
Less than 1.02 MeV
Which of the following absorbed doses would be the most damaging to organs or tissues?
5mGy from 5MeV a - particles
b.
5mGy from 6MeV electrons
c. 5mGy from 50keV x-rays
d.
5mGy from 10keV neutrons
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