Search for long lived heaviest nuclei beyond the valley of stability

@article{Chowdhury2008SearchFL,
  title={Search for long lived heaviest nuclei beyond the valley of stability},
  author={Partha Roy Chowdhury and Chhanda Samanta and Dipankar Narayan Basu},
  journal={Physical Review C},
  year={2008},
  volume={77},
  pages={044603}
}
The existence of long lived superheavy nuclei (SHN) is controlled mainly by spontaneous fission and {alpha}-decay processes. According to microscopic nuclear theory, spherical shell effects at Z=114, 120, 126 and N=184 provide the extra stability to such SHN to have long enough lifetime to be observed. To investigate whether the so-called 'stability island' could really exist around the above Z, N values, the {alpha}-decay half-lives along with the spontaneous fission and {beta}-decay half… 

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References

SHOWING 1-10 OF 113 REFERENCES
Systematical law of spontaneous fission half-lives of heavy nuclei
Systematic calculations on spontaneous fission half-lives of heavy nuclei are carried out by Swiatecki's formula with new parameters and by its generalized form. A new formula with only four
Properties of the hypothetical spherical superheavy nuclei
Theoretical results on the ground-state properties of the hypothetical spherical superheavy atomic nuclei are presented and discussed. Even-even isotopes of elements Z=104{minus}120 are considered.
Valleys due to Pb and Sn on the potential energy surface of superheavy and lighter α-emitting nuclei
The strong shell effects of the magic nuclei 208Pb, 132Sn and 102Sn are the origin of valleys on the potential energy surfaces (PES) of the superheavy nucleus 294118 and of the alpha emitters 212Po
Spontaneous-fission half-lives of deformed superheavy nuclei.
TLDR
Spontaneous-fission half-lives of the heaviest nuclei are analyzed in a multidimensional deformation space and are predicted for many unknown nuclei, sufficient to detect them if synthesized in a laboratory.
Nuclear physics: Island ahoy!
TLDR
Spectroscopy of the nobelium isotope, 254No reveals three excited structures, two of them metastable, which will help to constrain nuclear models of the superheavy elements, and provides more data for the search for the next magic numbers.
Theoretical Estimates of Spontaneous-Fission Half-Lives for Superheavy Elements Based on the Modified-Oscillator Model
The stability problem for the superheavy elements has been reconsidered based on the use of the shape-dependent droplet model and the modified-oscillator potential. The effect of axial asymmetry on
...
...