A highly neutron-rich cluster and/or a superheavy nucleus in the compound nucleus 238U+238U:: A mean field study

Clustering structures of the various resonance states of the compound nucleus (476)184*, formed in U-238 + U-238 reaction, are studied within the standard relativistic mean field (RMF) and non-relativistic Skyrme Hartree-Fock formalisms. The formations of various possible clusters and superheavy nuclei as daughter products are discussed. Both the formalisms support clustering phenomenon, the RMF presenting a somewhat more realistic picture. Also, before the asymptotic fissioning state, a kind of triple fission, with the cluster appearing in the neck region of two equal fragments, is obtained as one of the possibilities in RMF formalism.