Abstract
One of the rare examples of phenomena predicted before experimental discovery, offers the opportunity to introduce fission theory based on the asymmetric two center shell model. The valleys within the potential energy surfaces are due to the shell effects and are clearly showing why cluster radioactivity was mostly detected in parent nuclei leading to a doubly magic lead daughter. Saddle point shapes can be determined by solving an integro-differential equation. Nuclear dynamics allows us to calculate the half-lives. The following cluster decay modes (or heavy particle radioactivities) have been experimentally confirmed: 14C, 20O, 23F, 22,24–26Ne, 28,30Mg, 32,34Si with half-lives in good agreement with predicted values within our analytical superasymmetric fission model. The preformation probability is calculated as the internal barrier penetrability. An universal curve is described and used as an alternative for the estimation of the half-lives. The macroscopic–microscopic method was extended to investigate two-alpha accompanied fission and true ternary fission. The methods developed in nuclear physics are also adapted to study the stability of deposited atomic clusters on the planar surfaces.
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Acknowledgments
This work was supported by Deutsche Forschungsgemeinschaft (DFG) and partially within IDEI Programme under contracts 123/01.10.2007 and 124/01.10.2007 with UEFISCSU, Bucharest. One of us (DNP) is grateful to DFG for the Mercator Guest Professorship.
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Poenaru, D.N., Greiner, W. (2010). Cluster Radioactivity. In: Beck, C. (eds) Clusters in Nuclei. Lecture Notes in Physics, vol 818. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-13899-7_1
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