A boosted fission device uses a hollow sealed fissile core. The hollow part contains a measured amount of tritium gas. When the fission device is detonated the heat and pressure ignites tritium fusion in the gas. This fusion emits a flood of high energy neutrons, which causes additional fissions in the (now vapor) fissile material, boosting the yield. Such devices can be implemented with a "Dial-a-Yield" feature by allowing different amounts of tritium gas to be injected into the hollow core (more tritium, more neutrons, more yield).
fission..sup
fission
Fission and fusion
explain how a fusion reactor would be similar to a fission reaction
Not fusion, but a fission reaction.
fission and/or fusion
Fusion or fission.
fusion nuclear reaction followed by fission nuclear reaction
Fission is the opposite reaction to fusion. Fission involves the splitting of a heavy atomic nucleus into lighter elements, releasing a large amount of energy in the process.
To some degree. Hydrogen bombs release energy via nuclear fusion, but they use a fission reaction to trigger the fusion.
Nuclear energy is either:fission reaction, orfusion reaction, orradioactive decay
It isn't, in general. Thermonuclear bombs use a fission bomb to generate the heat and pressure required to start the fusion process, but there are other ways of doing it (stars do so by gravity, for instance).