Delayed neutrons are produced when the radioactive ssion products produced by the process of nuclear ssion become neutron rich and decide to emit a neutron to return to a more stable state. Part 1: Compared to the prompt neutrons, which are produced about 10−12 seconds after the nucleus is split apart, how long does it take on average for these “delayed” neutrons to appear. Part 2: Relative to the prompt neutrons, how many delayed neutrons are produced for every 1000 prompt neutrons from a typical U-235 fuel rod? Part 3: How many steps are there in the process that allows a ssion product to produce a delayed neutron? Part 4: Write down each of these steps, and show each of the reactions involved, assuming that we start with a “neutronrich” ssion product having the following composition: FP (A,Z).
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