Summary
An attempt is made to interpret the symmetric spontaneous fission of the heavy actinides,e.g. of258Fm, according to the general scheme developed by the authors in the case of asymmetric fission. This attempt leads to observations suggesting that this kind of symmetric fission occurs for nuclei in which the initial formation of a cluster within the valence shells of the fissioning nucleus yields an energy higher than the threshold for formation of a pion, and that this mode of fission could be related to a phase change of nuclear matter.
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Mouze, G., Ythier, C. New points of view on the symmetric fission of258Fm. Nuov Cim A 104, 1525–1533 (1991). https://doi.org/10.1007/BF02817435
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DOI: https://doi.org/10.1007/BF02817435