Document Type : Research Article
Authors
Department of physics, faculty of basic science, University of Mazandaran, P.O. Box 47415-416, Babolsar, Iran
Abstract
This work systematically investigates the cluster radioactivity of superheavy parent nuclei 267,270,271,272,274Bh (Z = 107) and 268,269,270,271,272Hs (Z = 108) within a binary decay model. We consider a wide range of emitted clusters, including 6He, 14C, 18,20O, 23F, 22,24,25,26Ne, 28,29,30Mg, and 32,34Si, along with their corresponding daughter nuclei. Using the Wentzel-Kramers-Brillouin (WKB) approximation, we compute Q-values, interaction barriers, driving potentials (V − Q), barrier penetrabilities, decay constants λ, and half-lives for all energetically allowed (Q > 0) cluster–daughter combinations. From the full set of possible emissions, we identify the most probable clusters based on the largest Q-values and significant penetrabilities. The resulting half-lives are tabulated and analyzed as a function of parent mass number, revealing systematic trends that underscore the dominant role of nuclear shell effects in determining favored cluster emissions. Our calculations provide a comprehensive data set on the decay properties of superheavy isotopes for Z = 107 and Z = 108 and mass region A = 267–274, offering valuable insights into their stability and the underlying mechanisms of cluster radioactivity.
Highlights
- Cluster radioactivity in superheavy nuclei is a quantum tunneling process and a probe of underlying nuclear structure.
- Increase in neutron number enhances the probability of heavy cluster emission while suppressing light cluster channels.
- Decay modes occur when emitted cluster and residual daughter nucleus approach magic or near-magic configurations.
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