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Title: Alpha-decay chains of Z=122 superheavy nuclei using cubic plus proximity potential with improved transfer matrix method
Authors: Naveya, G
Kumar, S Santhosh
Philominraj, S I A
Stephen, A
Keywords: Transfer matrix method;Superheavy nuclei;Alpha decay;Spontaneous fission;Magic numbers;Decay chain
Issue Date: May-2020
Publisher: NISCAIR-CSIR, India
Abstract: The alpha decay chain properties of Z = 122 isotope in the mass range 298£ A £ 350, even-even nuclei, are studied using a fission-like model with an effective combination of the cubic plus proximity potential in the pre and post-scission regions, wherein the decay rates are calculated using improved transfer matrix method, and the results are in good agreement with other phenomenological formulae such as Universal decay law, Viola-Seaborg, Royer, etc. The nuclear ground-state masses are taken from WS4 mass model. The next minimum in the half-life curves of the decay chain obtained at N=186,178 & 164 suggest the shell closure at N=184, 176 & 162 which coincides well with the predictions of two-centre shell model approach. This study also unveils that the isotopes 298-300, 302, 304-306, 308-310, 312,314122 show 7a, 5a, 4a, 3a, 2a and 1a decay chain, respectively. All the other isotopes from A = 316 to 350 may undergo spontaneous fission since the obtained SF half -lives are comparatively less. The predictions in the present study may have an impact in the experimental synthesis and detection of the new isotopes in near future.
Page(s): 397-403
ISSN: 0975-0959 (Online); 0301-1208 (Print)
Appears in Collections:IJPAP Vol.58(05) [May 2020]

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