renucleation
/ˌriːnjuːklɪˈeɪʃn/noun
1The fact or process of establishing a new centre or focal point.
2The formation or provision of new nuclei or a new nucleus. Chiefly in Physical Chemical : the renewed aggregation of particles to form a new phase.
Origin
1930s; earliest use found in H. G. Wells (1866–1946), novelist and social commentator. From re- + nucleation.