3-points extra credit: What is the fundamental difference between charged-particle interactions and photon interactions that causes the range of charged particles to be so much shorter than the range of photons?

The gamma constant for F-18 is 5.73 R-cm2/mCi/hr. What exposure rate would you expect from a syringe containing 15mCi of an F-18 dose measured at 50 cm?

Calculate the energy of a Bremsstrahlung photon when a 1.2 MeV beta-minus particle that has 455 keV of kinetic energy after is passes close to an atomic nucleus. 

What is the energy of the scattered gamma ray when a 511-keV gamma ray undergoes a Compton interaction and is scattered through an angle of 180 degrees? What is the energy of the Compton electron?

Define linear attenuation coefficient.

Explain how a dose calibrator works by answering the following questions: What region of the voltage-response curve does the dose calibrator operate in? What does the radiation create within the dose calibrator’s gas chamber? What happens to these electrons? What is measured by the machine? How is this converted to radioactivity?

Why does lead (Pb) make a good shielding material for gamma rays? Why is it NOT a good choice for shielding beta particles?

3-points extra credit: What is the fundamental difference between charged-particle interactions and photon interactions that causes the range of charged particles to be so much shorter than the range of photons?

The gamma constant for F-18 is 5.73 R-cm2/mCi/hr. What exposure rate would you expect from a syringe containing 15mCi of an F-18 dose measured at 50 cm?

Calculate the energy of a Bremsstrahlung photon when a 1.2 MeV beta-minus particle that has 455 keV of kinetic energy after is passes close to an atomic nucleus.