The second step of the fission reaction

This rearrangement step begins by a collision between the bare 82-proton phase of the ²⁰⁸Pb core and the charged cluster. A proof is furnished by the symmetric fission of ²⁵⁸Fm. There, the ¹³²Sn product can be formed only by the fusion of the ⁵⁰Ar cluster with the whole 82-proton phase, whereas the complementary product ¹²⁶Sn comes from the 126-neutron phase. This rearrangement can occur only thanks to the intervention of a new boson field allowing not only a modification of the quark-constitution of core and cluster but also the sharing- out of the charge between the two products; and all that occurs within an extremely short time interval. The value, 0.17 yoctosecond, of this lifetime results from the uncertainty in the mass, neutron number and charge number, 4, about 2.4 and about 1.6 respectively, observed in transfer reactions and in fission. In the lighter nucleus ²³⁵U, due to confinement, the nucleons of the cluster are shared-out between p- and n-phases; its fission is asymmetric.