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α decay properties of ^(296)Og within the two-potential approach

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Chinese Physics C 2018年第4期42卷 166-170页

作者：邓军刚赵阶成陈玖龙吴喜军李小华 School of Nuclear Science and Technology University of South China School of Math and Physics University of South China Cooperative Innovation Center for Nuclear Fuel Cycle Technology & Equipment University of South China Key Laboratory of Low Dimensional Quantum Structures and Quantum Control Hunan Normal University

The present work is a continuation of our previous paper[J.-G. Deng, et al., Chin. Phys. C, 41：124109 （2017）]. In the present work, the α decay half-life of the unknown nucleus 296Og is predicted within the two-potential approach and the hindrance factors of all 20 even-even nuclei in the same region as 296Og, i.e. proton number 82 〈 Z 〈 126 and neutron number 152 〈 N 〈 184, from 250Cm to 294Og, are extracted. The prediction is 1.09 ms within a factor of 5.12. In addition, based on the latest experimental data, a new set of parameters of α decay hindrance factors for the even-even nuclei in this region, considering the shell effect and proton-neutron interaction, are obtained.

关键词： α decay ^296Og hindrance factor two-potential approach

Systematic study on the proton radioactivity of spherical proton emitters

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Nuclear Science and Techniques 2023年第4期34卷 93-101页

作者： Dong-Meng Zhang Lin-Jing Qi De-Xing Zhu Yang-Yang Xu Song Luo Xiao-Hua Li School of Nuclear Science and Technology University of South ChinaHengyang 421001China National Exemplary Base for International Sci&Tech.Collaboration of Nuclear Energy and Nuclear Safety University of South ChinaHengyang 421001China Cooperative Innovation Center for Nuclear Fuel Cycle Technology&Equipment University of South ChinaHengyang 421001China Key Laboratory of Low Dimensional Quantum Structures and Quantum Control Hunan Normal UniversityChangsha 410081China

In this study, based on a two-potential approach, we systematically investigated the proton radioactivity half-lives of spherical proton emitters with 69≤Z≤81 from the ground and/or isomeric state, choosing the nuclear potential to be a modified Woods–Saxon potential that contains the isospin effect of the daughter nucleus. It was found that the calculated half-lives could reproduce the experimental data well. Furthermore, we extended this model to predict the half-lives of 17 protonemitting candidates whose radioactivity is energetically allowed or observed but not yet quantified in NUBASE2020. For comparison, the unified fission model, Coulomb potential and proximity potential model, universal decay law for proton emission, and new Geiger–Nuttall law were also used. All the predicted results are consistent with each other.

关键词： Proton radioactivity Spherical nuclei two-potential approach Modified Woods–Saxon potential Half-lives

Systematic study of two-proton radioactivity half-lives using the two-potential and Skyrme-Hartree-Fock approaches

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Chinese Physics C 2021年第12期45卷 122-128页

作者：潘霄邹有甜刘宏铭何彪李小华吴喜军张振 School of Nuclear Science and Technology University of South ChinaHengyang 421001China School of Math and Physics University of South ChinaHengyang 421001China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China College of Physics and Electronics Central South UniversityChangsha 410083China Cooperative Innovation Center for Nuclear Fuel Cycle Technology&Equipment University of South ChinaHengyang 421001China Key Laboratory of Low Dimensional Quantum Structures and Quantum Control Hunan Normal UniversityChangsha 410081China

In this work,we systematically study the two-proton(2_(p))radioactivity half-lives using the two-potential approach,and the nuclear potential is obtained using the Skyrme-Hartree-Fock approach and the Skyrme effective interaction of SLy8.For true 2_(p) radioactivity(Q2_(p)>0 and Q_(p)two-proton radioactivity,respectively),the standard deviation between the experimental half-lives and our theoretical calculations is 0.701.In addition,we extend this model to predict the half-lives of 15 possible 2_(p) radioactivity candidates with Q2_(p)>0 obtained from the evaluated atomic mass table AME2016.The calcu-lated results indicate a clear linear relationship between the logarithmic 2_(p) radioactivity half-lives(logio10T_(1/2))and coulomb parameters[(Z_(d)^(0.8)+l^(0.25))Q_(2_(p))^(-1/2)]considering the effect of orbital angular momentum proposed by Liu et al.[Chin.Phys.C 45,024108(2021)].For comparison,the generalized liquid drop model(GLDM),effective liquid drop model(ELDM),and Gamow-like model are also used.Our predicted results are consistent with those obtained using other relevant models.

关键词： two-proton radioactivity Skyrme-Hartree-Fock two-potential approach

Systematic study of α preformation probability of nuclear isomeric and ground states

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Chinese Physics C 2017年第1期41卷 93-99页

作者：孙小东吴喜军郑波向东郭萍李小华 School of Math and Physics University of South China Hengyang 421001 China School of Nuclear Science and Technology University of South China Hengyang 421001 China Cooperative Innovation Center for Nuclear Fuel Cycle Technology & Equipment University of South China Hengyang 421001 China

In this paper, based on the two-potential approach combining with the isospin dependent nuclear potential, we systematically compare the α preformation probabilities of odd-A nuclei between nuclear isomeric states and ground states. The results indicate that during the process of α particle preforming, the low lying nuclear isomeric states are similar to ground states. Meanwhile, in the framework of single nucleon energy level structure, we find that for nuclei with nucleon number below the magic numbers, the α preformation probabilities of high-spin states seem to be larger than low ones. For nuclei with nucleon number above the magic numbers, the α preformation probabilities of isomeric states are larger than those of ground states.

关键词： α decay α preformation probability nuclear isomer two-potential approach