Investigations on the superheavy nuclei with magic number of neutrons and protons

Manjunatha, H. C.; Sowmya, N.; Manjunath, N.; Seenappa, L.

doi:10.1142/s0218301320500287

Cited by 24 publications

(3 citation statements)

References 95 publications

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“…The magicity of the parent nucleus is indicated by a high half-life, while that of the daughter nucleus by a low half-life [7]. The theories therefore predict that N = 184 is a magic number, and this is consistent with the conclusion of [55][56][57].…”

Section: Resultssupporting

confidence: 58%

Predictions of the alpha-decay half-lives of even–even superheavy nuclei using modified Gamow-like model

Azeez¹,

Yahya²,

Saeed³

2022

Phys. Scr.

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α-decay half-lives of superheavy nuclei have been studied using modified Gamow-like model and improved empirical formulas. The empirical formulas used in the study are Viola-Seaborg semi-empirical formula, universal decay law (UDL), Denisov-Khudenko formula (DK), Royer formula, Wang formula, AKRE formula, and new Ren B (NRB) formula. New values of the adjustable parameters in the modified Gamow-like model have been obtained using a least square fit scheme and input data from the NUBASE2020 database. We found that only two adjustable parameters are sufficient to describe the α-decay half-lives of heavy and superheavy nuclei. We also obtained new coefficients for the seven empirical formulas using similar procedure. The modified Gamow-like model (MGLM) and improved empirical formulas are then used to calculate the α-decay half-lives of measured superheavy nuclei with Z = 100 − 118. The calculated root mean square errors indicate that the Royer, DK, and AKRE formulas are the best three empirical formulas for evaluating the α-decay half-lives of the superheavy nuclei. The five best performing empirical formulas, together with the MGLM, are then used to predict alpha-decay half-lives of unmeasured even-even superheavy nuclei with Z = 120 − 126. The Q α values used for the predictions have been taken from the tabulated Weizsäcker-Skyrme-4+RBF (WS4+RBF) Qα values. The theoretical calculations suggest that N = 184 is a possible magic number, which is in agreement with previous theoretical calculations.

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Section: Resultssupporting

confidence: 58%

Predictions of the alpha-decay half-lives of even–even superheavy nuclei using modified Gamow-like model

Azeez¹,

Yahya²,

Saeed³

2022

Phys. Scr.

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“…We also notice that there have been some works using the GLDM with proximity energy Prox. 81 [52] or proximity energy Denisov [73] instead of the original proximity energy formalism in the GLDM to study the α decay [75][76][77][78]. The calculations can reproduce the experimental data better than those calculated by the original GLDM.…”

Section: Introductionmentioning

confidence: 99%

Systematic study of α decay half-lives within the Generalized Liquid Drop Model with various versions of proximity energies *

Deng¹,

Zhang²

2021

Chinese Phys. C

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It is universally acknowledged that the Generalized Liquid Drop Model (GLDM) has two advantages over other α decay theoretical models: introduction of the quasimolecular shape mechanism and proximity energy. In the past few decades, the original proximity energy has been improved by numerous works. In the present work, the different improvements of proximity energy are examined when they are applied to the GLDM for enhancing the calculation accuracy and prediction ability of α decay half-lives for known and unsynthesized superheavy nuclei. The calculations of α half-lives have systematic improvements in reproducing experimental data after choosing a more suitable proximity energy for application to the GLDM. Encouraged by this, the α decay half-lives of even-even superheavy nuclei with Z=112-122 are predicted by the GLDM with a more suitable proximity energy. The predictions are consistent with calculations by the improved Royer formula and the universal decay law. In addition, the features of the predicted α decay half-lives imply that the next double magic nucleus after 208Pb is 298Fl.

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“…Multinucleon transfer reactions have been studied in fusion reactions of 40 Ca+ 208 Pb by bombarding energies close to the Coulomb barrier [29]. In addition, many researchers have theoretically predicted the evaporation residue cross sections in the superheavy region [17,[33][34][35][36][37][38][39][40][41] and investigated the role of the magic number of protons and neutrons in the superheavy region [42][43][44]. Litnevsky et al [45] studied the capture, fusion, fission, and evaporation residue formation cross sections of superheavy nuclei within the previously proposed two-stage dynamical model.…”

Section: Introductionmentioning

confidence: 99%

Heavy ion fusion of spherical nuclei

Manjunatha¹,

Sowmya²,

Seenappa³

et al. 2023

Chinese Phys. C

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We have studied experimental and theoretical fusion reactions for compound nuclei that weresynthesized by different projectile-target systems among which at least one projectile/targetnuclei are spherical nuclei. The first part of this study analyses the fusion cross sections obtainedusing different projectile-target combinations in the synthesis of Polonium(Po), Thorium(Th)and Nobelium(No). The second part of this work suggests the fusion reaction to synthesizethe superheavy element Z=122. We have selected three nuclei as Polonium(Po), Thorium(Th),and Nobelium(No) which were synthesized by various projectile-target combinations. We alsoinvestigated fusion reactions such as 90Zr(208Pb,2n)296122 . This study may be a milestone in thesynthesis of superheavy element Z=122.

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Investigations on the superheavy nuclei with magic number of neutrons and protons

Cited by 24 publications

References 95 publications

Predictions of the alpha-decay half-lives of even–even superheavy nuclei using modified Gamow-like model

Predictions of the alpha-decay half-lives of even–even superheavy nuclei using modified Gamow-like model

Systematic study of α decay half-lives within the Generalized Liquid Drop Model with various versions of proximity energies *

Heavy ion fusion of spherical nuclei

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