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Systematic Calculations of α-decay Half-Lives Using Microscopic Deformed Potentials

Plasma Science and Technology 2012年第7期14卷 588-594页

作者：倪冬冬任中洲 Department of Physics Nanjing University Kavli Institute for Theoretical Physics China Center of Theoretical Nuclear Physics National Laboratory of Heavy-Ion Accelerator

A new version of the generalized density-dependent cluster model （GDDCM） is developed to describe an α particle tunneling through a deformed potential barrier. The microscopic deformed potential is numerically constructed in the double-folding model using the multipole ex- pansion method. The decay width of an α-cluster state is evaluated using the integral of the quasi-bound state wave function, the scattering state wave function, and the difference of poten- tials. We perform a systematic calculation of α-decay half-lives for favored transitions in even-even nuclei ranging from Z=52 to Z=104. The calculated half-lives are in good agreement with the experimental values. The relation between nuclear deformations and α-decay half-lives is also discussed in details.

关键词： a-decay cluster model half-lives deformed potentials

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Exploring the sensitivity of α-decay half-life to neutron skin thickness for nuclei around ^(208)Pb

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Nuclear Science and Techniques 2017年第2期28卷 44-48页

作者： Niu Wan Chang Xu Zhong-Zhou Ren Department of Physics and Key Laboratory of Modern Acoustics Institute of Acoustics Nanjing UniversityNanjing 210093 China Center of Theoretical Nuclear Physics National Laboratory of Heavy-Ion Accelerator Lanzhou 730000 China

Based on the newest experimentally extracted nuclear density distributions for double-magic nucleus208Pb(Tarbert et al. in Phys Rev Lett 112:242502, 2014),the sensitivity of α-decay half-life to nuclear skin thickness is explored in the vicinity of the shell closure region around208 Pb, i.e., isotopes of Z ? 82 and isotones of N ? *** the two-parameter Fermi(2PF) density distributions and an analytically derived formula, the α-decay half-life is found to be closely related to the magnitude of nuclear skin thickness. For a decays to the Z ? 82 isotopes, the α-decay half-life is found to decrease with the increasing neutron skin thickness, while the opposite behavior is found for a decays to the N ? 126 isotones. Therefore, it could be a possible way to extract the nuclear skin thickness from measured α-decay half-lives.

关键词： Density distribution Neutron skin thickness Density-dependent cluster model a-decay half-life

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Robustness of N=152 and Z=108 shell closures in superheavy mass region

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Chinese Physics C 2025年第1期49卷 1-6页

作者： Buyu Chen Jianmin Dong Yaqian Wang Guoqing Wu Department of Physics Hebei UniversityBaoding 071002China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China

The neutron shell gap at N=152 has been experimentally confirmed through high-precision mass measurements on nobelium(Z=102)and lawrencium(Z=103)*** experimental measurements onα-decay properties suggest that deformed doubly-magic nature of ^(270)***,the magic gaps in the superheavy region are generally expected to be *** this study,we test the robustness of N=152 shell closure in N=152 isotones and Z=108 shell closure in Hs isotopes by employing an alternative approach where both theoretical analysis and available experimental data are *** with existing experimental measurements on a-decay energies,it is determined that robust N=152 neutron shell persists at least in Z=101-105 isotopes,and robust Z=108 proton shell persists in Hs isotopes with N=159,***,the relativistic mean-field model is determined as unable to provide N=152 ***,the conclusion that robust N=152 shell exists at least in Z=101-105 isotopes,provides crucial benchmarks for constraining effective interactions suitable for superheavy nuclei in nuclear energy-density functional theory in future.

关键词： superheavy nuclei shell gap a-decay decay energy

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