How Rare Is Cluster Decay of Superheavy Nuclei?

Poenaru, D. N.; Gherghescu, R. A.; Greiner, Walter; Shakib, Nafiseh Shayan

doi:10.1007/978-3-319-10199-6_13

Cited by 4 publications

(2 citation statements)

References 35 publications

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“…This phenomenon, first observed in 1984 (Rose and Jones, 1984) as the emission of 14 C from 223 Ra, has since been confirmed in a number of heavy nuclei with Z > 86, which decay by emitting light clusters between 14 C and 34 Si, as well as in superheavy nuclei with Z ≤ 116 (Itkis et al, 2015;Kozulin et al, 2014). For superheavy nuclei with Z ≥ 118, cluster radioactivity is expected to become competitive with alpha decay and spontaneous fission (Poenaru and Gherghescu, 2018;Poenaru et al, 2011Poenaru et al, , 2012Poenaru et al, , 2013Poenaru et al, , 2015Santhosh and Nithya, 2018a;Zhang and Wang, 2018). Microscopically, cluster emission can be considered as an extremely asymmetric fission, with the heavy fragment corresponding to a nucleus in the neighborhood of the doubly-magic 208 Pb (Warda and Robledo, 2011).…”

Section: Fissionmentioning

confidence: 75%

Colloquium : Superheavy elements: Oganesson and beyond

et al. 2019

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During the last decade, six new superheavy elements were added into the seventh period of the periodic table, with the approval of their names and symbols. This milestone was followed by proclaiming 2019 the International Year of the Periodic Table of Chemical Elements by the United Nations General Assembly. According to theory, due to their large atomic numbers, the new arrivals are expected to be qualitatively and quantitatively different from lighter species. The questions pertaining to superheavy atoms and nuclei are in the forefront of research in nuclear and atomic physics, and chemistry. This Colloquium offers a broad perspective on the field and outlines future challenges. References

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Section: Fissionmentioning

confidence: 75%

Colloquium : Superheavy elements: Oganesson and beyond

et al. 2019

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“…Therefore, α-decay and spontaneous fission (SF) have higher priority over such decay modes. Moreover, decay through the cluster radioactivity process in superheavy nuclei is competing with α-decay [61].…”

Section: Decay Properties Of the Isotopic Seriesmentioning

confidence: 99%

A search for neutron magicity in the isotopic series of Z = 122, 128 superheavy nuclei

Siddiqui

Quddus

Ahmad

et al. 2020

J. Phys. G: Nucl. Part. Phys.

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The superheavy nuclei have been examined systematically in the region 158 ⩽ N ⩽ 218, 162 ⩽ N ⩽ 212 for Z = 122 and 128, respectively. The explicit density-dependent meson-exchange (DD-ME) and point-coupling (DD-PC) models within the framework of covariant density functional theory (CDFT) have been used to study the structural and decay properties of the isotopic series which includes the separable form of a finite range of pairing interaction. From the potential energy curves, the ground state properties of nuclei are predicted. Due to the importance of the shell effect in the superheavy region, the Strutinsky shell correction method has been employed for a better understanding of the extra stability of nuclei. The results from neutron pairing energy, two-neutron separation energy (S 2n ), single-particle energy levels, and total shell-correction energy strongly support N = 168, 174, and 178 as deformed neutron-magic numbers from both the force parameter, in both the isotopic series. N = 172 and 184 are predicted as spherical magic with DD-ME2 interaction in the Z = 122 isotopic series. Using three different semi-empirical approaches named UNIV2, SemFIS2, and ImSahu, the α-decay properties are studied and compared with available experimental data, FRDM2012 and the WS4 mass model. The stability of synthesized superheavy nuclei can be determined by comparing spontaneous fission half-lives with α-decay half-lives.

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