Answer to Question #152460 in Physics for Tina Will

Question

a. Explain how a medical linac can be used in either an electron mode or photon mode for the
treatments of cancer patients. Then explain why an x-ray tube can only have a photon mode.
b. Which of the following two beams is a better approximation to an isotropic source: a 100 kV
beam from an x-ray tube or a 4 MeV photon beam from a medical linac? Explain briefly the
reason for your choice.
c. Another type of particle accelerator is a cyclotron which can be used to produce medical
radioisotopes. Suppose one of these devices accelerates protons to 6.5 MeV. If the magnetic
field in the cyclotron is 1.2 T, then what is the diameter of the largest orbit, just before the
protons exit the cyclotron

Answer 1

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