Lisäfission

Lisäfission is a term used in some contexts to describe a secondary or subsequent fission event. Fission itself refers to the process where a heavy atomic nucleus splits into two or more smaller nuclei, releasing a significant amount of energy. This process can occur spontaneously in certain isotopes or be induced by bombarding the nucleus with neutrons or other particles.

The concept of lisäfission suggests that after an initial fission event, one or more of the resulting fission fragments may themselves undergo further fission. This can happen if the fission fragments are still sufficiently unstable or if they are captured by neutrons. However, in most common nuclear fission scenarios, such as those occurring in nuclear reactors or atomic bombs, the primary focus is on the initial fission event and the resulting energy release. The subsequent fission of fragments is typically a less significant contributor to the overall energy output or neutron population, though it can play a role in certain specialized nuclear processes or in the decay chains of fission products. The term is not as widely standardized as "fission" and may appear in specific research or technical discussions rather than general nuclear physics literature.