Systematic study of alpha decay half-lives using new universal decay law

Akrawy, Dashty T.; Hassanabadi, H.; Hosseini, S. S.; Santhosh, K. P.

doi:10.1142/s0218301319500757

Cited by 29 publications

(26 citation statements)

References 62 publications

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“…The α-decay Half-lives: Geiger and Nuttall predicted the linear relationship between (Color online) The estimated α-decay half-life (T α 1/2 ) for the isotopic chain of Z = 102 to 118 nuclei using UDL formula [57], Viola-Seaborg formula [57], modified UDL formula [58] and Modified Brown formula [59] for RMF (NL3 * ) are given along with the FRDM predictions, and available experimental data [101]. See text for details.…”

Section: Data Points Amentioning

confidence: 99%

“…And the fitting parameters a, b, c, d, and e having values 0.41149, -0.42047, -22.89310, 12.13020, and -44.60575 respectively are taken from ref. [58].…”

Section: Neutron Numbermentioning

confidence: 99%

“…This formula was modified by introducing an additional hindrance term depending on parity. The modified Brown (MBrown) formula [59] used here is given as: 7 but for modified UDL formula [58]. See text for details.…”

Section: Neutron Numbermentioning

confidence: 99%

“…The Finite drop liquid model (FRDM), Global Nuclear Mass Model (WS4), and the available experimental data are taken for comparison. Four different semi-empirical formulae, i.e., the universal decay law (UDL) [57], Viola-Seaborg semi-empirical formula (VSS) [57], modified the universal decay law (MUDL) [58], and Modified Brown formula (MBrown) [59] are used to obtain the α-decay half-lives and their relative predictivity in the superheavy region. The possible mean or standard deviations are calculated with respect to the available experimental data to determine the applicability of the model for the superheavy island.…”

Section: Introductionmentioning

confidence: 99%

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Exploring the ground state bulk and decay properties of the nuclei in superheavy island

Jain,

Kumar,

Bhuyan

2022

Preprint

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The α-decay half-lives of 204 superheavy nuclei covering the range 114 ≤ Z ≤ 126 have been investigated using the relativistic mean-field model (RMF) for NL3 * parameter set. The ground state bulk properties such as binding energy, quadrupole deformation parameter (β 2 ), and root-mean-square charge radii for these nuclei are analyzed. Four different semi-empirical formulae, namely, the universal decay law (UDL), the Viola-Seaborg (VSS) formula, the modified universal decay law (MUDL), and the modified Brown formula (MBrown), are used to obtain the α-decay half-lives for the considered nuclei. To examine the applicability of relativistic mean-field model within NL3 * parametrization, the α-decay energies, and the half-lives of a few known superheavy nuclei within the range 102 ≤ Z ≤ 118 are calculated and the results are compared with the experimental data along with the theoretical predictions. The α-decay energies (Q-values) are estimated from the binding energies of the parent, and daughter from the RMF (NL3 * ) parameter set. The calculated results are compared with macroscopic-microscopic Finite-Range-Droplet-Model (FRDM), Global Nuclear Mass Model (WS3, WS4), Weizsacker-Skyrme mass model (WS * ) predictions, and the experimental data, wherever available. The possible standard deviations are also estimated for experimental and various theoretical predictions. We find a good consistency for the experimental-to-UDL, FRDM-to-UDL, and WS4-to-UDL estimates of the decay energy and corresponding half-life. The present analysis provides the theoretical predictions within the microscopic model for the upcoming experiments on the superheavy region.

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Section: Data Points Amentioning

confidence: 99%

“…And the fitting parameters a, b, c, d, and e having values 0.41149, -0.42047, -22.89310, 12.13020, and -44.60575 respectively are taken from ref. [58].…”

Section: Neutron Numbermentioning

confidence: 99%

Section: Neutron Numbermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Exploring the ground state bulk and decay properties of the nuclei in superheavy island

Jain,

Kumar,

Bhuyan

2022

Preprint

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“…Among all the decay chains, α-decay is the most prominent decay mode for the super-heavy elements. Several formulae have been proposed to study the α-decay half-lives using the decay energy Q α value, among which three well known phenomenological formulae as given by Viola-Seaborg [41], Royer [42] and modified universal decay law (MUDL) [43] are used for our proposed calculations.…”

Section: The Q-value and α-Decay Half-lifementioning

confidence: 99%

Structure and Decay Properties of Th Isotopes Using E-RMFT Formalism

et al. 2022

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In the present scenario, the search for the thermally fissile nuclei is crucial and also important not only for the research background of nuclear physics but also for the great social and economic impact on the country. Many theoretical works have been performed to analyze a series of Th and U-isotopes and found that some of these isotopes are stable against α-decays and spontaneous fission. Here, we have chosen the isotopic chain of Th-nuclei for the present analysis using relativistic mean-field formalism. The work also explores a few stable isotopes in this region of the nuclear landscape, which is crucial for understanding the exotic region of the nuclear landscape. The objective of this work is to study the bulk properties such as binding energies, root mean square charge radii, neutronproton radii, neutron skin-thickness as well as intrinsic properties such as excitation energy and specific heat for the Th-isotopic chain. Furthermore, the stability of these isotopes is investigated through their possible decay chain analysis. The relativistic mean-field theory was used to obtain the nuclear bulk properties, namely, binding energies, root-mean-square charge radii, neutron skin-thickness, and excitation energy. The steady solution of the temperaturedependent effective relativistic mean-field equations was obtained selfconsistently by taking different inputs of the initial deformations. All the calculations were done for NL3, FSUGarnet and IOPB-I parameter sets for Th-isotopes. The decay energy of α (Q α ) and β-decay (Q β ) were calculated from the binding energies and were further used to obtain the corresponding halflives. We have analyzed the structural and decay properties of Th isotopes. The excitation energy and specific heat are also estimated for these considered nuclei by using the temperature-dependent effective relativistic mean-field (E-RMFT) formalism for NL3, FSUGarnet and IOPB-I parameters sets. The calculated results are compared with the available experimental data and found similar observations for all the parameter sets at a given temperature. The excitation energy study signifies the shell melting point where maybe the shape transition occurs. Three phenomenological formulae such as Viola-Seaborg, Royer and modified universal decay law are adopted for the calculation of αdecay half-lives. We found lower values of α-decay half-lives indicating a higher rate of β-decay for the isotopic chain.

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