None of the options provided (alpha decay, beta-plus decay, beta-minus decay, gamma decay) are forms of nuclear fission. Nuclear fission specifically refers to the process where a heavy nucleus splits into smaller nuclei along with the release of energy and often additional neutrons.
If you need to reference the types of decay listed, they are forms of nuclear decay but not fission:
- Alpha decay involves the emission of an alpha particle (helium nucleus).
- Beta-plus decay involves the emission of a positron (positive beta particle).
- Beta-minus decay involves the emission of an electron (negative beta particle).
- Gamma decay involves the release of gamma radiation, which is high-energy photons.
If the question strictly requires an answer, please note that none of the given decays represent fission.
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