Studies on the emission of various exotic fragments from superheavy nuclei via cluster decay process

Anjali, K. P.; Prathapan, K.; Biju, R.K.

doi:10.1016/j.nuclphysa.2019.121644

Cited by 11 publications

(6 citation statements)

References 76 publications

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“…Same results are also found by Zhang et al, using various empirical formulas [22]. Using Coulomb and Proximity Potential Model [25], Analytical Super-Asymmetric Fission Model (ASAF) together with Universal formula (UNIV) [28], the possibilities of cluster emission from 294,296 Og are investigated. Few new efforts are underway in this superheavy region [30][31][32][33].…”

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confidence: 57%

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Cluster radioactivity in 294,296Og

et al. 2021

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Cluster radioactivity is one of the exotic phenomena which offers an alternate emission in heavy and superheavy nuclei in addition to the α-decay and spontaneous fission. In the present work, we predict half-lives of cluster decay in superheavy nuclei 294,296 Og by picking up the emission of all possible even-even isotopes from He to Mo (Z=2-42). These half-lives are compared with the half-lives of α-decay, and accordingly the possibility of most probable cluster emission is ascertained. For these decay processes, the disintegration energies (Q-values) are taken from WS4 mass model. To estimate cluster emission half-lives, we use few widely known empirical formulas i.e. Horoi [

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supporting

confidence: 57%

“…The nuclei 294,296 Og are the crucial nuclei for cluster emission as well, as speculated in Ref. [22][23][24][25][26][27][28][29]. Recently, Bai et al, studied the cluster emission from 294,296 Og using Wentzel-Kramers-Brillouin (WKB) method and found the possible emitted clusters as 86 Kr and 88 Kr.…”

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confidence: 94%

Cluster radioactivity in 294,296Og

et al. 2021

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“…Even though the S(n) of 40 P is lower than its S(2n), it can be considered as a 2n-halo since it has a minimum at 2n +core configuration. Therefore, the 2-n halo candidates are 34 Ne, 36 Na and 40 P. From the plot of driving potential, in the case of 29 Ne, 31 Ne and 37 Mg, we can see that with the increase in the angular momentum quantum number (l ), the 1n + core configuration is shifted to 2n + core configuration This kind of changes are observed when the ground state spin and parity of the decays are not conserved [33]. The spin and parity of 24 Na , However, the halo nuclei prefer the lowest angular momentum state (l = 0) since large angular momentum will give rise to a centrifugal potential that would tend to confine the nucleons [7].…”

Section: Resultsmentioning

confidence: 99%

Theoretical Study on the Formation of 1-neutron and 2-neutron Halo Nuclei via Decay of Elements in Super-Heavy Region

Biju¹,

Prathapan²,

Anjali³

2020

J. Nucl. Phy. Mat. Sci. Rad. A.

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The possibility for the existence of 1-neutron and 2-neutron halo nuclei through the decay of even-even nuclei 270-316116, 272-318118 and 278-320120 in the super-heavy region is studied within the frame work of the Coulomb and Proximity Potential Model (CPPM). Halo structure in neutron rich nuclei with Z<=20 is identified by calculating the neutron separation energies and on the basis of potential energy considerations. The 1n + core configuration of proposed 1-neutron halo nuclei between z=10 and Z=20 is found shifted to 2n + core configuration in higher angular momentum states. The calculation of half-life of decay is performed by considering the proposed halo nuclei as spherical cluster and as deformed nuclei with a rms radius. Except for 15C, the half-life of decay is found decreased when the rms radius is considered. Only the 1-neutron halo nuclei 26F and 55Ca showed half-lives of decay which are less than the experimental limit. None of the proposed 2-neutron halo nuclei have shown a half-life of decay lower than the experimental limit. Also, the probability for the emission of neutron halo nuclei is found to be less in super-heavy region when compared with the clusters of same isotope family. Further, neutron shell closure at neutron numbers 150, 164 and 184 is identified form the plot of log10 T1/2 verses the neutron number of parents. The plots of Q-1/2 verses log10 T1/2 and -ln P verses log10 T1/2 for various halo nuclei emitted from the super-heavy elements are found to be linear showing that Geiger-Nuttall law is applicable to the emission of neutron halo also.

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“…Alpha decay is also an essential process in astrophysics and helps us understand the formation of elements in the universe. As the most important way of decay between heavy and super heavy nuclei, alpha-decay opened an area for researchers to discover new and exotic unstable nuclei and isotopes [1][2][3][4][5][6][7][8][9]. The study of alpha-decay, as an important area to realize the nuclear structure, is a powerful way to understand the amounts of spin, parity, ground state energy, nuclear radius, electric quadrupole moment, the island of stability, and many other nuclear features.…”

Section: Introductionmentioning

confidence: 99%

Improved calculation of alpha decay half-life by incorporating nuclei deformation shape and proximity potential

Yazdankish,

Nejatolahi

2023

Phys. Scr.

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Accurate evaluation of alpha decay half-life is important for understanding nuclear stability, ensuring nuclear safety, optimizing medical treatments, and studying astrophysical processes. Considering the deformed shape of nuclei, we calculated the alpha-decay half-life of 359 nuclei using the proximity potential. In addition, we employed the Wentzel-Kramers-Brillouin approximation to compute the penetration probability through the potential barrier comprising nuclear, Coulomb, and centrifugal potentials. Our calculations revealed that the penetration probability, and hence the alpha-decay half-life, depend on the direction of alpha particle emission relative to the axial symmetry of the parent nuclei. Furthermore, our results suggested that the dependence of alpha-decay on parent nuclei temperature needs to be reassessed. We tabulated the alpha-decay half-life for various nuclei, and our results shown better agreement with experimental data compared to theoretical data in the literature.

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Studies on the emission of various exotic fragments from superheavy nuclei via cluster decay process

Cited by 11 publications

References 76 publications

Cluster radioactivity in 294,296Og

Cluster radioactivity in 294,296Og

Theoretical Study on the Formation of 1-neutron and 2-neutron Halo Nuclei via Decay of Elements in Super-Heavy Region

Improved calculation of alpha decay half-life by incorporating nuclei deformation shape and proximity potential

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