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Tensor force effect on proton shell structure in neutron-rich Ca isotopes

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Science China(Physics,Mechanics & Astronomy) 2013年第9期56卷 1719-1729页

作者： LI ZhenYu WANG YanZhao YU guoLiang gu jianzhong School of Physics and Electronic Science Guizhou Normal College China Institute of Atomic Energy Department of Mathematics and Physics Shijiazhuang TieDao University Department of Mathematics and Physics North China Electric power university Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator of Lanzhou

In the framework of the Skyrme-Hartree-Fock approach with 36 sets of the TI J parameterizations,the tensor force effect on the evolution of the single-proton states in the calcium isotopes is systematically *** is shown that the single-proton states with higher angular momenta are influenced significantly by the tensor force and the trend in the evolution of somesingle-particle energy differences with the mass number of the isotopes depends sensitively on a parameter βT associated with the intensity of the tensor *** understand this phenomenon,we analyze the spin-orbit potentials and the radial wave functions of relevant single-proton orbits in *** addition,it is found that some TI J interactions could cause the 2s1/21d3/2 energy level inversion in 48Ca.

关键词： Skyrme-Hartree-Fock tensor force effect single-proton states Ca isotopes

Tensor force effect on single-proton energy levels of oxygen isotopes

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Science China(Physics,Mechanics & Astronomy) 2014年第9期57卷 1662-1668页

作者： YU guoLiang gu jianzhong WANG YanZhao LI ZhenYu MENG GaoQing Department of Mathematics and Physics North China Electric Power University China Institute of Atomic Energy Department of Mathematics and Physics Shijiazhuang TieDao University School of Physics and Electronic Science Guizhou Normal College

In the framework of the Hartree-Fock approach the proton spin-orbital splittings of the 1p orbits and the shell gaps in the oxygen isotopes are investigated with the interactions SLy5+T,SLy5+Tw,SGII+Te1,SGII+Te2,SGII+Te3 and many sets of the TIJ *** of the interactions are the Skyrme interactions and contain a tensor component(tensor force).It is shown that the evolution of the single-proton levels for the oxygen isotopes is sensitive to a parameterβTwhich is associated with the tensor force strength of the Skyrme *** understand this phenomenon,we systematically analyze the dependence of the spin-orbit splittings and shell gaps on the parameterβTin terms of the spin-orbit potential and the corresponding wave *** find that the Skyrme interactions can be classified into two groups:(a)T21,T32,T43,T54,SLy5+T,SLy5+Tw,SGII+Te1 and SGII+Te2,which can roughly reproduce the experimental shell gaps of the oxygen isotopes;(b)T1J and SGII+Te3,which can not reproduce the experimental shell gaps.

关键词： tensor force Skyrme interaction shell gaps

Nuclear properties of Z=114 isotopes and shell structure of^298114

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Communications in Theoretical Physics 2020年第2期72卷 75-82页

作者： Yanzhao Wang YonghaoGao JianpoCui and jianzhong gu Department of Mathematics and Physics Shijiazhuang Tiedao UniversityShijiazhuang 050043China Institute of Applied Physics Shijiazhuang Tiedao UniversityShijiazhuang 050043China China Institute of Atomic Energy PO Box 275(10)Beijing 102413China Department of Physics Royal Institute of Technology(KTH)SE-10691 StockholmSweden

The two-neutron separation energies(S2n)andα-decay energies(Qα)of the Z=114 isotopes are calculated by the deformed Skyrme-Hartree-Fock-Bogoliubov(SHFB)approach with the SLy5,T22,T32 and T43 *** is found that the tensor force effect on the bulk properties is weak and the shell closure at N=184 is seen evidently with these interactions by analyzing the S2n and Qαevolutions with neutron number ***,the single-particle energy spectra of 298114 are studied using the spherical SHFB approach with these interactions to furthermore examine the shell structure of the magic nucleus *** is shown that the shell structure is almost not changed by the inclusion of the tensor force in the Skyrme ***,by examining the energy splitting of the three pairs of pseudospin partners for the protons and neutrons of 298114,it is concluded that the pseudospin symmetry of the neutron states is preserved better than that of the proton states and not all of the pseudospin symmetries of the proton and neutron states are influenced by the tensor force.

关键词： superheavy nuclei Skyrme–Hartree–Fock–Bogoliubov approach tensor force two-neutron separation energies alpha-decay energies shell structure pseudospin symmetry

An improved semi-empirical relationship for cluster radioactivity

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Chinese Physics C 2021年第4期45卷 366-379页

作者： Yanzhao Wang Fengzhu Xing Yang Xiao jianzhong gu Department of Mathematics and Physics Shijiazhuang Tiedao UniversityShijiazhuang 050043China Institute of Applied Physics Shijiazhuang Tiedao UniversityShjiazhuang 050043China China Institute of Atomic Energy P.O.Box 275(10)Bejing 102413China

An improved semi-empirical relationship for cluster radioactivity half-lives is proposed by introducing an accurate charge radius formula and an analytic expression of the preformation ***,the cluster radioactivity half-lives for the daughter nuclei around ^(208)Pb or its neighbors and the ^(12)C radioactivity half-life of114Ba are calculated within the improved semi-empirical *** is shown that the accuracy of the new relationship is improved significantly compared to its *** addition,the cluster radioactivity half-lives that are experimentally unavailable for the trans-lead and trans-tin nuclei are predicted by the new semi-empirical *** predictions might be useful for searching for the new cluster emitters of the two islands in future experiments.

关键词： cluster radioactivity released energy half-life improved semi-empirical relationship

Application of wavelet transform in-ray spectra analysis

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Science China(Physics,Mechanics & Astronomy) 2013年第9期56卷 1735-1739页

作者： YU guoLiang gu jianzhong HOU Long LI ZhenYu WANG YanZhao ZHANG YiYun Department of Mathematics and Physics North China Electric Power University Department of Nuclear Physics China Institute of Atomic Energy School of Physics and Electronic Sciences Guizhou Normal College Department of Mathematics and Physics Shijiazhuang Tiedao University College of Physical Science and Technology Si Chuan University

The frequency distribution of different ingredients in-ray spectra,e.g.,photo-peak,fluctuations of counts and Compton region,is separately *** wavelet transform of-ray spectra,the wavelet coefficients of a photo-peak increase with transforming scales and these coefficients show direct proportion with intensity of peak at determinate scale.A novel algorithm based on wavelet transform is proposed and *** results indicate that most of the photo-peaks in multi-spectra can be determined accurately,the-rays energy and intensity of the peak can also be *** method has the prospect of being applied in on-line multi-spectra analysis in such fields as radioprotection and nuclear safety monitoring.

关键词： wavelet transform -ray spectra photo-peak

Two-proton radioactivity of ground and excited states within a unified fission model

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Chinese Physics C 2021年第12期45卷 129-139页

作者： Fengzhu Xing Jianpo Cui Yanzhao Wang jianzhong gu Department of Mathematics and Physics Shijiazhuang Tiedao UniversityShijiazhuang 050043China Institute of Applied Physics Shijiazhuang Tiedao UniversityShijiazhuang 050043China China Institute of Atomic Energy P.O.Box 275(10)Beijing 102413China

A unified fission model is extended to study two-proton radioactivity of the ground states of nuclei,and a good agreement between the experimental and calculated half-lives is *** two-proton radioactivity half-lives of the ground states of some probable candidates are predicted within this model by inputting the released energies taken from the AME2020 *** is shown that the predictive accuracy of the half-lives is comparable to those of other ***,two-proton radioactivity of the excited states of^(14)O,^(17,18)Ne,^(22)Mg,^(29)S,and^(94)Ag is discussed within the unified fission model and two analytical *** is found that the experimental half-lives of the excited states are reproduced better within the unified fission ***,the two formulas are not suitable for the study of two-proton radioactivity of excited states because their physical appearance deviates from the mechanism of quantum tunneling,and the parameters involved are obtained without including experimental data from the excited states.

关键词： two-proton radioactivity released energy half-life unified fission model analytical formula

Two-proton radioactivity of exotic nuclei beyond proton drip-line

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Communications in Theoretical Physics 2021年第7期73卷 81-88页

作者： Yanzhao Wang Jianpo Cui Yonghao Gao jianzhong gu Department of Mathematics and Physics Shijiazhuang Tiedao UniversityShijiazhuang 050043China Institute of Applied Physics Shijiazhuang Tiedao UniversityShijiazhuang 050043China China Institute of Atomic Energy PO Box 275(10)Beijing 102413China

To search for new candidates of the true and simultaneous two-proton(2 p)radioactivity,the 2 p decay energies(Q2 p)are extracted by the Weizs?cker–Skyrme-4(WS4)model,the finite-range droplet model(FRDM),the Koura–Tachibana–Uno–Yamada(KTUY)model and the Hartree–Fock–Bogoliubov mean-field model with the BSk29 Skyrme interaction(HFB29).Then,the 2 p radioactivity half-lives are calculated within the generalized liquid drop model by inputting the four types of Q2 *** the energy and half-life constraints,it is found that the probable 2 p decay candidates are the nuclei beyond the proton-drip line in the region of Z≤50 based on the WS4 and KTUY mass *** the FRDM mass model,the probable 2 p decay candidates are found in the region of Z≤***,the 2p-decaying candidates are predicted in the region of Z≤58 by the HFB29 mass *** means that the probable 2 p decay candidates of Z>50 are only predicted by the HFB29 mass ***,the competition between the true 2p radioactivity andα-decay for the nuclei above the N=Z=50 shell closures is *** is shown that~(101)Te,~(111)Ba and~(114)Ce prefer to 2p radioactivity and the dominant decay mode of~(107)Xe and~(116)Ce isα-decay.

关键词： 2p radioactivity alpha-decay decay energies half-lives GLDM

Traditional Chinese Medicine symptom patterns in patients with colorectal carcinoma

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Journal of Traditional Chinese Medicine 2018年第2期38卷 299-308页

作者： Li Yan gu jianzhong Zhou Huamiao Wang Hui Zou Ying Yang Weihong guo Yong Department of First Clinical Medicine Zhejiang Chinese Medicine University Hangzhou 310053 China Department of Oncology the First Affiliated Hospital of Zhejiang Chinese Medicine University Hangzhou 310006 China Department of First Clinical Medicine Zhejiang Chinese Medicine University Hangzhou 310053China

OBJECTIVE: To observe the symptom patterns(or syndromes) according to Traditional Chinese Medicine(TCM) theory in patients with various stages of colorectal cancer, and to observe the dynamic evolution process of these TCM ***: A prospective and cross-sectional questionnaire-based investigation was performed. Clinical data on TCM symptom patterns in patients with colorectal cancer in the perioperative period(210 cases) and adjuvant treatment period(160 cases)were collected. EPIData 3.1 together with frequency statistics and cluster analyses were performed to identify the TCM patterns based on symptom characteristics in patients with colorectal cancer, and to assess the dynamic changes in these ***: In the perioperative period, from the first day of perioperative care to postoperative days 3,7, and 10, the TCM pattern showed a process of dynamic change from blood deficiency to deficiency of both Qi and Yin and the pattern of dampness and hot accumulative knotting. In the adjuvant treatment period, the TCM pattern changed from Qi deficiency and Yin deficiency inner-heat with dampness to a deficiency pattern, primarily including Yin deficiency of the liver and kidney, deficiency of Qi and blood, and spleen ***: Our study confirmed that variations in the dynamic evolution of TCM symptom patterns exist in patients with colorectal cancer during different treatment periods. This information is of great value in the individualized management of colorectal cancer.

关键词： Colorectal neoplasms Perioperative pe-riod Chemoradiotherapy adjuvant Deficiencysymptom complex

High spin states in stable nucleus ^(84)Sr

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Science China(Physics,Mechanics & Astronomy) 2010年第10期53卷 1861-1867页

作者： KANG XuZhong SHEN ShuiFa HAN guangBing PAN Feng gu jianzhong DRAAYER J P WU Xiaoguang ZHU LiHua WEN TingDun Key Laboratory of Nuclear Resources and Environment(East China Institute of Technology) Ministry of EducationNanchang 330013China School of Nuclear Engineering and Technology East China Institute of TechnologyFuzhou 344000China Department of Physics Liaoning Normal UniversityDalian 116029China Department of Physics and Astronomy Louisiana State UniversityBaton RougeLA 70803-4001USA School of Physics Shandong UniversityJinan 250100China China Institute of Atomic Energy Beijing 102413China Department of Physics North University of ChinaTaiyuan 030051China

High spin states of 84Sr were populated through the reaction 70Zn(18O,4n)84Sr at 75 MeV beam *** of excitation function,γ-γ coincidences,directional correlation from oriented state (DCO) ratios and γ-transition intensities were performed using eight anticompton HPGe detectors and one planar HPGe *** on the measured results,a new level scheme of 84Sr was established in which 12 new states and nearly 30 new γ-transitions were identified in the present *** positive-parity states of the new level scheme were compared with the results from calculations in the framework of the projected shell model (PSM).One negative-parity band was extended to spin Iπ=19-and it can be found that in the high spin states,the γ-transition energies show the nature of signature *** negative-parity band levels are in good agreement with deformed configuration-mixing shell model (DCM) calculations.

关键词： high spin states γ-γcoincidence DCO ratio level scheme PSM