Cluster preformation as barrier penetrability

Abstract

It is shown that preformed-cluster models are equivalent with fission models, used to describe in a unified way cluster radioactivities and α decay. For the first time cluster preformation probability is interpreted as the penetrability of the prescission part of the barrier. A linearized universal curve of each kind of cluster radioactivity is derived in the range of mass numbers detected up to now. The corresponding formula describes well the general trend of experimental data. The need for shell effect correction is illustrated on α decay of 124 even-even emitters.