(Solved): (a) How can you separate the radiation emitted from a radioactive source into components? (b)Ex ...

(a) How can you separate the radiation emitted from a radioactive source into components? (b)Explain the radiations according to their penetrating abilities. (c) What are the values of the radiation weighting factors for $\mathrm{x}$ - ray at all energies and for neutrons at $2\mathrm{MeV}$ ? (d) Write three examples for man-made radiation sources. (e) PET (positron emission tomography) gives an accurate picture of an area in the body. Explain how it appears. (f) A parent isotope has a half-life $t_{1/2}=10^4$ years $=3.15\times 10^{11}\mathrm{s}$. It decays through a series of radioactive daughters to a final stable isotope. At $t=0$ it has $10^{20}$ parent nuclei. What is the activity (decay/second) of the parent isotope at $t=0?\left(1\mathrm{Ci}=3.7\times 10^{10}\mathrm{Bq}\right)$