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Systematic study of proton radioactivity half‑lives

Nuclear Science and Techniques 2023年第2期34卷 167-177页

作者： Yang‑Yang Xu Xiao‑Yuan Hu De‑Xing Zhu Xi‑Jun Wu Peng‑Cheng Chu Xiao‑Hua Li School of Nuclear Science and Technology University of South ChinaHengyang 421001China School of Math and Physics University of South ChinaHengyang 421001China The Research Center for Theoretical Physics Science SchoolQingdao University of TechnologyQingdao 266033China National Exemplary Base for International Science and Technology.Collaboration of Nuclear Energy and Nuclear Safety University of South ChinaHengyang 421001China Cooperative Innovation Center for Nuclear Fuel Cycle Technology and Equipment University of South ChinaHengyang 421001China Key Laboratory of Low Dimensional Quantum Structures and Quantum Control Hunan Normal UniversityChangsha 410081China

In the present study,on the basis of the screened electrostatic effect of the Coulomb potential,we propose an improved Gamow model within the centrifugal potential in which there are only two adjustable parameters,i.e.,the screened parameters t and g,which represent the combined effect of the interaction potential and reduced mass of the emitted proton-daughter nucleus on the half-life of proton radioactivity in the overlapping *** this model,we systematically calculated the proton radioactivity half-lives of 31 spherical nuclei and 13 deformed nuclei and obtained corresponding root-mean-square deviations of 0.274 and 0.367,*** relationship between the proton radioactivity half-life of 177Tlm and the corresponding angular momentum l removed by the emitted proton is also *** addition,we used the proposed model to predict the proton radioactivity half-lives of 18 nuclei whose proton radioactivity is energetically allowed or observed but not yet quantified in *** comparison,we used the universal decay law of proton radioactivity proposed by Qi et al.(Phys Rev C 85:011303,***://***/10.1103/PhysR evC.85.011303),and the new Geiger–Nuttall law of proton radioactivity proposed by Chen et al.(Eur Phys J 55:214,***://***/10.1140/epja/i2019-12927-7).

关键词： proton radioactivity Gamow model Half-lives

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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

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Systematic study of proton radioactivity half-lives based on the relationship between Skyrme-Hartree-Fock and the macroscopic quantities of nuclear matter

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Chinese Physics C 2022年第10期46卷 156-162页

作者： Jun-Hao Cheng Zhen Zhang Xi-Jun Wu Peng-Cheng Chu Xiao-Hua Li School of Nuclear Science and Technology University of South ChinaHengyang 421001China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China School of Math and Physics University of South ChinaHengyang 421001China School of Science Qingdao Technological UniversityQingdao 266000China 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,we systematically investigate the proton radioactivity half-lives of 33 spherical nuclei based on the relationship between Skyrme parameters and the macroscopic quantities of nuclear *** the two-potential approach with the spherical Skyrme-Hartree-Fock model,the correlation between proton radioactivity half-life and the macroscopic quantities is ***,we obtain a new Skyrme parameter set by fitting the two most weighted macroscopic *** with the Skyrme parameters MSLO and the theoretical model of proton radioactivity UDLP,the theoretical proton radioactivity half-life calculated using the new Skyrme parameter set can better reproduce the experimental data.

关键词： proton radioactivity Skyrme Hartree-Fock macroscopic quantities of nuclear matter

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proton radioactivity Within a Hybrid Method

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原子核物理评论 2016年第2期33卷 167-172页

作者：张鸿飞 School of Nuclear Science and Technology Lanzhou University Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator

The proton radioactivity half-lives are investigated theoretically within a hybrid *** potential barriers preventing the emission of protons are determined in the quasimolecular shape path within a generalized liquid drop model(GLDM). The penetrability is calculated with the WentzelKramers-Brillouin(WKB) approximation. The spectroscopic factor has been taken into account in halflife calculation, which is obtained by employing the relativistic mean field(RMF) theory combined with the Bardeen-Cooper-Schrieffer(BCS) method. The half-lives within the present hybrid method reproduced the experimental data very well. Some predictions for proton radioactivity are made for future experiments.

关键词： proton radioactivity generalized liquid drop model WKB approximation BCS method relativistic mean field theory

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Investigation of proton radioactivity with the effective liquid drop model

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Chinese Physics C 2015年第2期39卷 34-38页

作者：圣宗强舒良萍樊广伟孟影钱建发 School of Science Anhui University of Science and Technology School of Chemical Engineering Anhui University of Science and Technology

proton radioactivity has been investigated using the effective liquid drop model with varying mass asymmetry shapes and effective inertial coefficients. An effective nuclear radius constant formula replaces the old empirical one in the calculations. The theoretical half-lives are in good agreement with the available experimental data. All the deviations between the calculated logarithmic half-lives and the experimental values are less than 0.8. The root-mean-square （rms） deviation is 0.523. Predictions for the half-lives of proton radioactivity are made for elements across the periodic table. From the theoretical results, there are 11 candidate nuclei for proton radioactivity in the region Z〈51. In the region Z〉83, no nuclei are suggested as probable candidate nuclei for proton radioactivity within the selected range of half-lives studied.

关键词： proton radioactivity effective liquid drop model half-life exotic decay

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Theoretical Studies of proton radioactivity

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原子核物理评论 2016年第2期33卷 184-189页

作者： Lidia S. Ferreira Enrico Maglione Centro de Fisica e Engenharia de Materiais CeFEMA and Departmento de Fisica Instituto Superior Tecnico Universidade de Lisboa Av Rovisco Pals 1049 001 Lisboa Portugal Dipartimento di Fisica e Astronomia "G. Galilei" Via Marzolo 8 1-35131 Padova Italy Istituto Nazionale di Fisica Nucleate Padova Italy

In the paper, we will discuss the most recent theoretical approaches developed by our group,to understand the mechanisms of decay by one proton emission, and the structure and shape of exotic nuclei at the limits of s... 详细信息

关键词： proton radioactivity drip-line nuclear density functional theory

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利用一种包含新的通用方程的亲近势模型对原子核质子衰变进行研究（英文）

利用一种包含新的通用方程的亲近势模型对原子核质子衰变进行研究...

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中国核学会2015年学术年会

作者：郭晨雷张高龙 School of Physics and Nuclear Energy Engineering Beihang University International Research Center for Nuclei and Particles in the Cosmos Beihang University State Key Laboratory of Software Development Environment and Department of Physics Beihang University

The nuclear potential between proton and the daughter nuclei is calculated in frame of proximity potential with a new universal *** obtained and analyzed the half-lives of proton radioactivity of the mother *** comparing to the experimental data and the other calculation results of ground and isomer states of proton emitters,it is found that the present calculation results can reproduce the order of magnitude of the experimental *** indicates that the proximity potential with a new universal function can estimate the half-life of proton ***:23.50.+z

关键词： proton radioactivity universal function proximity potential half-life

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