a. Outline the theory of the PET scanner.
b. It is suggested that a scanner could be designed using the annihilation of a proton and an antiproton. Calculate:
i. The energy released in the proton–antiproton annihilation
ii. The wavelength of the γ-ray photons produced in the annihilation.
c. In one type of PET scanner, the tracer isotope is Rb-82. Write an equation for the decay of this isotope. (Mass of proton = 1.67 × 10⁻²⁷ kg.)