Fissile nuclides, such as U-233, U-235, and Pu-239, can be fissioned by both thermal and fast neutrons, although their fission cross-section for fast neutrons is lower. In contrast, fertile nuclides can only be fissioned by fast neutrons after absorbing one, leading to the formation of a fissile nucleus. Understanding the distinction between fissile and fertile nuclides is crucial for nuclear physics and reactor design.
PREREQUISITESNuclear physicists, reactor engineers, and students studying nuclear engineering will benefit from this discussion, particularly those focused on fission processes and reactor design.