PREFORMATION FACTOR IN CLUSTER RADIOACTIVITY

We present a fine-structure effect in exotic decays by using the clust er preformation mechanism. The cluster formation is treated as a quant um mechanical fragmentation process and is obtained within the asymmet ric two-centre shell model of Maruhn and Greiner. The shell effects in the potential energy surfaces and mass parameters play a key role for the explanation of experimentally observed fine-structure effect. Als o, the asymmetric two-centre shell model is well suited for the predic tions of yet unmeasured decays. (C) 1997 Elsevier Science B.V.