In: Physics
a)A reliable energy source during long space flights can be in the form of radioactive material. One nuclide that has been used is 94238Pu which decays by α-decay. The half-life is 87.7 years. After how long time has the power changed from 5 kW to 4 kW?
b) What are the differences between positron, electron, and proton? Discuss.
c) What do you understand from photoelectric and Compton scattering interactions? Discuss.