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Generalized time-dependent generator coordinate method for induced fission dynamics

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Frontiers of physics 2024年第4期19卷 1-12页

作者： B.Li D.Vretenar T.Nikšić j.zhao P.W.zhao j.Meng State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China Physics Department Faculty of ScienceUniversity of Zagreb10000 ZagrebCroatia Center for Circuits and Systems Peng Cheng LaboratoryShenzhen 518055China

The generalized time-dependent generator coordinate method(TD-GCM)is extended to include pairing *** correlated GCM nuclear wave function is expressed in terms of time-dependent generator states and weight *** particle–hole channel of the effective interaction is determined by a Hamiltonian derived from an energy density functional,while pairing is treated dynamically in the standard BCS approximation with time-dependent pairing tensor and single-particle occupation *** the inclusion of pairing correlations,various time-dependent phenomena in open-shell nuclei can be described more *** model is applied to the description of saddle-to-scission dynamics of induced *** generalized TD-GCM charge yields and total kinetic energy distribution for the fission of 240Pu,are compared to those obtained using the standard time-dependent density functional theory(TD-DFT)approach,and with available data.

关键词： nuclear density functional theory generator coordinate method fission dynamics

REMAINING LIFE ASSESSMENT OF A 1Cr5Mo STEEL BY USING Z-PARAMETER METHOD

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Acta Metallurgica Sinica(English Letters) 2004年第4期17卷 601-605页

作者： j.zhao S.Q.Han S.M.Xie H.B.Gao L.Wang Department of Materials Engineering Dalian University of Technology Dalian 116024 ChinaDepartment of Materials Engineering Dalian University of Technology Dalian 116024 ChinaDepartment of Materials Engineering Dalian University of Technology Dalian 116024 ChinaDepartment of Materials Engineering Dalian University of Technology Dalian 116024 ChinaDepartment of Materials Engineering Dalian University of Technology Dalian 116024 China

Z-parameter method based on the Larson-Miller relationship is proposed to assess remaining life of a 1Cr5Mo steel. The non-linear master curve of stress a vs. Larson-Miller parameter P of the steel can be expressed as: P=29.608-5. 085logσ. A family of curves parallel to the master curve can be expressed as: P=29.608-Z-5.085logσ, where the value of Z represents the magnitude deviated from the master curve. A relationship between the value of Z-parameter and the level of spheroidization E (mi-crostructural degradation) can be expressed as: Z=0.203(E-1).

关键词： life assessment spheroidization carbides creep rupture

Upgrade of Control System for the BEPCII

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International Conference on Computing in High Energy and Nuclear Physics 2001年第1期 117-120页

作者： j.zhao C.H.Wang 等 InstituteofHighEnergyPhysics P.O.Box918（10）Beijing100039P.R.China InstituteofHighEnergyPhysics P.O.Bo

The BEPC will increase its luminosity ten times with upgrade of both the machine and detector,which is the project BEPCII,The project will be started at beginning chine and detector,which is the project *** project will be started at beginning of 2002 and finished within 3-4 *** order to reach the goal of the BEPCII,a number of new equipment will be added in the system,such as the superconducting RF cavities,new magnet power supplies and beam feedback system,and the BEPC control system has to be *** BEPC control system was built in 1987 and was upgraded in *** is an Open VMS and CAMAC based-system,some equipment is controlled by *** are going to upgrade the existing system by *** VME IOCs will be added in the system with feildbus,PLCs for the new equipment *** we will keep the existing system in use,such as CAMAC hardware ,PC based sub-control and application programs,which will be merged into the EPICS *** the development of the EPICS prototype has been *** some slow control,commercial SCADA product can be chosen as the development *** have just finished a prototype with the SCADA product *** paper will describe the system design and development issues.

关键词：正负电子对撞机控制系统改善提高

Timing of Holocene sea-level highstands by mass spectro-metric U-series ages of a coral reef from Leizhou Peninsula, South China Sea

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Chinese Science Bulletin 2002年第4期47卷 348-352页

作者： zhao jianxin & YU KefuDepartment of Earth Sciences, University of Queensland, Brisbane, Qld 4072, Australia (e-mail: j.zhao@earth.uq.edu.au) South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 501301, China (e-mail: kefuyu@scsi Department of Earth Sciences University of Queensland Brisbane Australia South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou China

Systematic mass spectrometric 230Th ages are reported for a Ponies coral reef terrace from Dengloujiao, Leizhou Peninsula, South China Sea. Seven episodes of coral growth were recognized in this terrace: 7125±96, 6764±29, 5826±37, 5006±54, 2543±24, 1915±15, and 1513±22 calendar years before present (cal. aBP). 50% of the coral age popula-tion fall between 7200 and 6600 cal. aBP, marking post-glacial stabilization of global sea level. Considering the facts that (i) Dengloujiao reef flat was measured at 1.6-2.5 m above modern tidal datum plane; (ii) modern Parties corals in the South China Sea are living at least ~1 m below the modern tidal datum plane; (iii) the top 20-30 cm of the reef was eroded; and (iv) crustal subsidence in the region since mid-Holocene was negligible, we conclude that the above age groups record at least two major periods (7200-5000 and 2500-1500 cal. aBP) of high sea-level at least 2.9-3.8 m above the present-day level.

关键词： coral South China Sea U-series dating sea level Holo-cene.

巴斯德氏菌的质粒形态分析及质粒DNA探针在鉴定鱼类病原体中的应用

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国外水产 1994年第3期 36-39页

作者： j.zhao 高健上海水产大学上海200090

质粒是环状双键 DNA 分子,可在寄主细胞中自我复制。细菌质粒对细菌本身的抗药性,降解有机物和毒素的能力,细菌的附着力、细胞渗透性和细菌的转换系统的功能都有重要作用。1988年,Aski 已检定出革兰氏阳性与阴性细菌体内都含有抗药性质... 详细信息

质粒是环状双键 DNA 分子,可在寄主细胞中自我复制。细菌质粒对细菌本身的抗药性,降解有机物和毒素的能力,细菌的附着力、细胞渗透性和细菌的转换系统的功能都有重要作用。1988年,Aski 已检定出革兰氏阳性与阴性细菌体内都含有抗药性质粒。Crosa 等(1977)发现弧菌(Vibrio angwill-arum)体内的毒性质粒与转铁系统有关。

关键词：鱼类病原体鉴定巴斯德氏菌质粒形态

An experimental apparatur for EDXD of high pressure specimens using synchrotron radiation at BSRF

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Beijing Synchrotron Radiation Facility 2001年第2期 176-179,页

作者： Y.H.jing Y.Yang X.ju jingLiu R.Z.Che j.zhao BSRF InstituteofHighEnergyPhysicsChineseAcademyofSciencesYupquanRoadBeijing100039People’sRepublicofchina InstituteofPhysics ChineseAcademyofSciencesBeijing100080People’sRepublicofChina

A high pressure energy dispersive X-ray diffraction apparatus on 3W1A bearmline,at BSRF,is described.A ten-Poles permanent magnetic wiggler provided white X-ray *** extreme high pressure up to 115GPa has been obtained by a modified Mao-Bell diamond anvil cell.A motorized loading system with strain sensor can finely control the pressure *** in situ experimental procedures are *** applications are also presented.2001 Elsevier Science *** rights reserved.

关键词： BSRF 北京同步辐射装置 X射线衍射高压发光性质 EDXD 能量弥散X射线探测器实验方法

控制芸苔油菜种子硫苷含量的位点及其与黑盘菌抗性间的关系

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国外作物育种 2004年第1期23卷 25-26页

作者： j.zhao j.Meng 谢国禄

以前鉴定了H5200和Ning RS-1杂交中与黑盘菌(Sclerotinia sclerotiorum)抗性相关的位点，发现有6个位点在不同的发育阶段和不同的器官中与黑盘菌抗性有关。本文将介绍硫苷及其各种成分的叽绘图结果以及种子特定硫苷含量与抗病性间的关系。

关键词：芸苔油菜种子硫苷含量黑盘菌抗性

LHAASO detection of very-high-energy γ-ray emission surrounding PSR j0248+6021

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Science China(Physics,Mechanics & Astronomy) 2025年

作者： Zhen Cao F.Aharonian Axikegu Y.X.Bai Y.W.Bao D.Bastieri X.j.Bi Y.j.Bi W.Bian A.V.Bukevich Q.Cao W.Y.Cao Zhe Cao j.Chang j.F.Chang A.M.Chen E.S.Chen H.X.Chen Liang Chen Lin Chen Long Chen M.j.Chen M.L.Chen Q.H.Chen S.Chen S.H.Chen S.Z.Chen T.L.Chen Y.Chen N.Cheng Y.D.Cheng M.C.Chu M.Y.Cui S.W.Cui X.H.Cui Y.D.Cui B.Z.Dai H.L.Dai Z.G.Dai Danzengluobu X.Q.Dong K.K.Duan j.H.Fan Y.Z.Fan j.Fang j.H.Fang K.Fang C.F.Feng H.Feng L.Feng S.H.Feng X.T.Feng Y.Feng Y.L.Feng S.Gabici B.Gao C.D.Gao Q.Gao W.Gao W.K.Gao M.M.Ge T.T.Ge L.S.Geng G.Giacinti G.H.Gong Q.B.Gou M.H.Gu F.L.Guo j.Guo X.L.Guo Y.Q.Guo Y.Y.Guo Y.A.Han O.A.Hannuksela M.Hasan H.H.He H.N.He j.Y.He Y.He Y.K.Hor B.W.Hou C.Hou X.Hou H.B.Hu Q.Hu S.C.Hu C.Huang D.H.Huang T.Q.Huang W.j.Huang X.T.Huang X.Y.Huang Y.Huang Y.Y.Huang X.L.ji H.Y.jia K.jia H.B.jiang K.jiang X.W.jiang Z.j.jiang M.jin M.M.Kang I.Karpikov D.Khangulyan D.Kuleshov K.Kurinov B.B.Li C.M.Li Cheng Li Cong Li D.Li F.Li H.B.Li H.C.Li jian Li jie Li K.Li S.D.Li W.L.Li W.L.Li X.R.Li Xin Li Y.Z.Li Zhe Li Zhuo Li E.W.Liang Y.F.Liang S.j.Lin B.Liu C.Liu D.Liu D.B.Liu H.Liu H.D.Liu j.Liu j.L.Liu M.Y.Liu R.Y.Liu S.M.Liu W.Liu Y.Liu Y.N.Liu Q.Luo Y.Luo H.K.Lv B.Q.Ma L.L.Ma X.H.Ma j.R.Mao Z.Min W.Mitthumsiri H.j.Mu Y.C.Nan A.Neronov K.C.Y.Ng L.j.Ou P.Pattarakijwanich Z.Y.Pei j.C.Qi M.Y.Qi B.Q.Qiao j.j.Qin A.Raza D.Ruffolo A.Sáiz M.Saeed D.Semikoz L.Shao O.Shchegolev X.D.Sheng F.W.Shu H.C.Song Yu.V.Stenkin V.Stepanov Y.Su D.X.Sun Q.N.Sun X.N.Sun Z.B.Sun j.Takata P.H.T.Tam Q.W.Tang R.Tang Z.B.Tang W.W.Tian L.H.Wan C.Wang C.B.Wang G.W.Wang H.G.Wang H.H.Wang j.C.Wang Kai Wang Kai Wang L.P.Wang L.Y.Wang P.H.Wang R.Wang W.Wang X.G.Wang X.Y.Wang Y.Wang Y.D.Wang Y.j.Wang Z.H.Wang Z.X.Wang Zhen Wang Zheng Wang D.M.Wei j.j.Wei Y.j.Wei T.Wen C.Y.Wu H.R.Wu Q.W.Wu S.Wu X.F.Wu Y.S.Wu S.Q.Xi j.Xia G.M.Xiang D.X.Xiao G.Xiao Y.L.Xin Y.Xing D.R.Xiong Z.Xiong D.L.Xu R.F.Xu R.X.Xu W.L.Xu L.Xue D.H.Yan j.Z.Yan T.Yan C.W.Yang C.Y.Yang F.Yang F.F.Yang L.L.Yang M.j.Yang R.Z.Yang W.X.Yang Y.H.Yao Z.G.Yao L.Q.Yin N.Yin X.H.You Z.Y.You Y.H Southwest jiaotong University School of Astronomy and Space Science Nanjing University Center for Astrophysics Guangzhou University Tsung-Dao Lee Institute & School of Physics and Astronomy Shanghai jiao Tong University Institute for Nuclear Research of Russian Academy of Sciences Hebei Normal University University of Science and Technology of China LHAASO Collaboration State Key Laboratory of Particle Detection and Electronics Key Laboratory of Dark Matter and Space Astronomy & Key Laboratory of Radio Astronomy Purple Mountain Observatory Chinese Academy of Sciences Research Center for Astronomical Computing Zhejiang Laboratory Key Laboratory for Research in Galaxies and Cosmology Shanghai Astronomical Observatory Chinese Academy of Sciences School of Physics and Astronomy Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center Yunnan University Key Laboratory of Cosmic Rays (Tibet University) Ministry of Education Department of Physics The Chinese University of Hong Kong Key Laboratory of Radio Astronomy and Technology National Astronomical Observatories Chinese Academy of Sciences School of Physics and Astronomy (Zhuhai) & School of Physics (Guangzhou) & Sino-French Institute of Nuclear Engineering and Technology (Zhuhai) Sun Yat-sen University Institute of High Energy Physics Institute of Frontier and Interdisciplinary Science Shandong University APC Université Paris Cité CNRS/IN2P3 CEA/IRFU Observatoire de Paris Department of Engineering Physics & Department of Astronomy Tsinghua University School of Physics and Microelectronics Chinese Academy of Sciences Zhengzhou University Yunnan Observatories Chinese Academy of Sciences China Center of Advanced Science and Technology College of Physics Sichuan University School of Physics Peking University Guangxi Key Laboratory for Relativistic Astrophysics School of Physical Science and Technology University of Chinese Academy of Sciences Guangxi University Department of Physics Faculty of Science Mahidol University Moscow Institute

We report the detection of an extended very-high-energy(VHE) γ-ray source coincident with the location of middle-aged(62.4 kyr) pulsar PSR j0248+6021, by using the LHAASO-WCDA data of live 796 d and LHAASO-KM2A data of live 1216d. A significant excess of γ-ray induced showers is observed both by WCDA in energy bands of 1-25 Te V and KM2A in energy bands of >25 TeV with 7.3σ and 13.5σ, respectively. The best-fit position derived through WCDA data is R.A. = 42.06°± 0.12°and Dec. = 60.24°± 0.13°with an extension of 0.69°±0.15°and that of the KM2A data is R.A.= 42.29°± 0.13°and Dec. =60.38°± 0.07°with an extension of 0.37°±0.07°. No clear extended multiwavelength counterpart of this LHAASO source has been found from the radio band to the GeV band. The most plausible explanation of the VHE γ-ray emission is the inverse Compton process of highly relativistic electrons and positrons injected by the pulsar. These electrons/positrons are hypothesized to be either confined within the pulsar wind nebula or to have already escaped into the interstellar medium, forming a pulsar halo.

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Deep view of composite SNR CTA1 with LHAASO in γ-rays up to 300 TeV

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Science China(Physics,Mechanics & Astronomy) 2025年

The ultra-high-energy（UHE） gamma-ray source 1LHAASO j0007+7303u is positionally associated with the composite SNR CTA1 that is located at high Galactic Latitude b ≈ 10.5°. This provides a rare opportunity to spatially resolve the component of the pulsar wind nebula（PWN） and supernova remnant（SNR） at UHE. This paper conducted a dedicated data analysis of 1LHAASO j0007+7303u using the data collected from December 2019 to july 2023. This source is well detected with significances of 21σ and 17σ at 8-100 TeV and >100 TeV, respectively. The corresponding extensions are determined to be 0.23°±0.03°and 0.17°±0.03°. The emission is proposed to originate from the relativistic electrons accelerated within the PWN of PSR j0007+7303. The energy spectrum is well described by a power-law with an exponential cutoff function dN/dE =（42.4 ± 4.1）(E/（20 TeV）)-2.31±0.11exp(-E/（110±25 TeV）) TeV-1cm-2s-1in the energy range from 8 to 300 TeV, implying a steady-state parent electron spectrum dNe/dEe∝(Ee/（100 TeV）)-3.13±0.16exp[(-Ee/（373±70 TeV）)2] at energies above ≈ 50 TeV. The cutoff energy of the electron spectrum is roughly equal to the expected current maximum energy of particles accelerated at the PWN terminal shock. Combining the X-ray and gamma-ray emission, the current space-averaged magnetic field can be limited to≈ 4.5 μG. To satisfy the multi-wavelength spectrum and the γ-ray extensions, the transport of relativistic particles within the PWN is likely dominated by the advection process under the free-expansion phase assumption.

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