Why exactly neutrons, and not electrons or a-particles, are the most effective projectiles for the nuclear

Why exactly neutrons, and not electrons or a-particles, are the most effective projectiles for the nuclear fission of uranium?

Because when the number of neutrons changes, only the mass number of particles changes, a new element is not formed (only during fission and not immediately) like an isotope. Otherwise, the reaction would not have worked.



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