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Influence of σ^(* )and φ Mesons on (A) Hyperon ^(1)S_(0) Superfluidity in Neutron Star matter

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Chinese physics Letters 2012年第5期29卷 252-255页

作者： XU Yan LIU Guang-Zhou WANG Hong-Yan DING Wen-Bo ZHAO En-Guang Changchun Observatory National Astronomical ObservatoriesChinese Academy of SciencesChangchun 130117 Center for Theoretical physics Jilin UniversityChangchun 130012 department of physics Bohai UniversityJinzhou 121000 Institute of Theoretical physics Chinese Academy of SciencesBeijing 100190

Within the framework of the relativistic mean field theory,we investigate the ^(1)S_(0) superfluidity (SF) of A hyperons in neutron star (NS) matter including σ^(*) and φ *** energy gap of ∧ hyperons is calculated with the Nijmegen one-boson-exchange potentials for a (∧∧) pair. The parameter set we use is in line with the recent experimental data △B_(∧∧) ~ 1.01 ± 0.20_+0.18-0.11 *** is found that with σ^(*) and φ mesons the pairing energy gap △F of ∧ hyperons and the corresponding SF critical temperature T_(C∧) are *** addition the NS mass range of ∧ hyperon SF is enlarged obviously.

关键词： meson relativistic addition

SOUND SPEED IN SYMMETRIC NUCLEAR matter WITH SGII TYPE INTERACTIONS

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Chinese science Bulletin 1990年第22期35卷 1874-1877页

作者：郑国桐苏汝铿 department of physics Hangzhou Teachers' College Hangzhou 310012 PRC department of physics Fudan University Shanghai 200433 PRC

The equation of state (EOS) for nuclear matter plays an important role in the experiments of heavy ions with medium and high energy. As pointed out by Osnes and Strottman, Su and Kuo, when effective nucleon-nucleon interactions (NN interactions) in nuclear theory are extended to the cases of high density and/or high temperature, EOS

关键词： equation of state real-time Green’s function method causal condition.

Rotational Mechanism of Ammonium Ion in Water and Methanol

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Chinese Journal of Chemical physics 2018年第4期31卷 568-574,616页

作者： Qiang Zhang Yang Du Chen Chen Wei Zhuang department of Chemistry Bohai UniversityJinzhou 121013China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of SciencesFuzhou 350002China

Dynamics of ammonium and ammonia in solutions is closely related to the metabolism of arnrnoniac compounds, therefore plays an important role in various biological processes. NMR measurements indicated that the reorientation dynamics of NH4＋ is faster in its aqueous solution than in rnethanol, which deviates from the Stokes-Einstein-Debye rule since water has higher viscosity than methanol. To address this intriguing issue, we herein study the reorientation dynamics of ammonium ion in both solutions using numerical simulation and an extended cyclic Markov chain model. An evident decoupling between translation and ro- tation of methanol is observed in simulation, which results in the deviation of reorientation from the Stokes-Einstein-Debye rule. Slower hydrogen bond （HB） switchings of ammonium with rnethanol comparing to that with water, due to the steric effect of the rnethyl group, remarkably retards the jump rotation of ammonium. The observations herein provide useful insights into the dynamic behavior of ammonium in the heterogeneous environments including the protein surface or protein channels.

关键词： Ammonium Jump rotation Hydrogen bond switching Methanol Moleculardynamics sirnulation

Theoretical Description of Water from Single-Molecule to condensed Phase:Recent Progress on Potential Energy Surfaces and Molecular Dynamics

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Chinese Journal of Chemical physics 2022年第2期35卷 227-241,I0001页

作者： Jun Chen Wei Zhuang State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Fujian science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108China

In this work,we review recent progress on the view of potential energy surfaces and molecular dynamics study of water and its related reactions in the last decade or *** important gas-phase reactions of water with radicals,chemisorbed dissociative dynamics of water on solid surfaces,and statistical mechanics and vibrational spectrum simulations of water from clusters to the condensed phase have been *** recently developed machine learning techniques,such as the neural networks in a combination of permutational invariant polynomials or fundamental invariants,the atomic neural networks framework,the gaussian approximation potentials with the smooth overlap of atomic position kernel,as well as the many-body expansion framework for the construction of highly accurate potential energy surfaces,have also been ***,some suggestions have been provided for further improvement of the potential energy surfaces and dynamics methods of water-related systems.

关键词： H_(2)O Potential energy surface Machine learning Density functional theory Molecular dynamics

Experimental and Theoretical Study on the Ethane and Acetylene Formation from Electron Irradiation of Methane Ices

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World Journal of condensed matter physics 2013年第1期3卷 14-20页

作者： Marianna Barberio Roberta Vasta Pasquale Barone Giulio Manicò Fang Xu Astronomy and physics department University of Catania Catania Italy physics department of Calabria Univeristy Rende Italy physics department of Calabria Univeristy Rende Italy National Research Council-CNR Magna Graecia University Catanzaro Italy

In this work we present an experimental and theoretical study on the formation of ethane and acetylene from solid methane condensed at 20 K and irradiated with a 500 - 3000 eV electron beam. The experiments were monitored with Thermal Desorption Spectroscopy. We observe that the electron irradiation induced a dehydrogenation of methane and a consequent formation of CHx (x = 1, 2, 3) fragments. Furthermore, in the solid during irradiation, a simple recombinetion reaction in the solid between two adjacent CHx molecules may form HC≡CH, H2C=CH2, and H3C-CH3 with a triple, double, and single carbon-carbon bond, respectively. The formed amount of ethane and acetylene increases with irradiation time and reaches a saturation value.

关键词： Solid Ices Ethane Formation Acetylene Formation Electron Irradiation

Nonautonomous Breather and Rogue Wave in Spinor Bose–Einstein Condensates with Space-Time Modulated Potentials

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Chinese physics Letters 2023年第4期40卷 6-10页

作者：丁崔崔周勤徐四六 Houria Triki Mohammad Mirzazadeh 刘文军 Research Group of Nonlinear Optical science and Technology School of Mathematical and Physical SciencesWuhan Textile UniversityWuhan 430200China State Key Laboratory of New Textile materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200China School of Biomedical Engineering and Medical Imaging Xianning Medical CollegeHubei University of Science and TechnologyXianning 437100China Radiation physics Laboratory Department of PhysicsFaculty of SciencesBadji Mokhtar UniversityP.O.Box 1223000 AnnabaAlgeria department of Engineering sciences Faculty of Technology and EngineeringEast of GuilanUniversity of GuilanRudsar-VajargahIran State Key Laboratory of Information Photonics and Optical Communications School of ScienceBeijing University of Posts and TelecommunicationsBeijing 100876China

To study controlled evolution of nonautonomous matter-wave breathers and rogue waves in spinor Bose–Einstein condensates with spatiotemporal modulation,we focus on a system of three coupled Gross–Pitaevskii equations with spacetime-dependent external potentials and temporally modulated gain-loss *** different external potentials and gain-loss distributions,various solutions for controlled nonautonomous matterwave breathers and rogue waves are derived by the Darboux transformation method,such as breathers and rogue waves on arched and constant backgrounds which have the periodic and parabolic *** of the gain-loss distribution and linear potential on the breathers and rogue waves are *** two-breathers on the arched and constant backgrounds are also derived.

关键词： Einstein Nonautonomous parabolic

HIGH-PRESSURE M(?)SSBAUER STUDY OF THE CUBIC LAVES PHASE COMPOUND DyFe_2

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Chinese science Bulletin 1992年第1期37卷 27-29页

作者：李发伸杨春力钟文定 H. MICKLITZ M. M. ABD-ELMEGUID department of physics Lanzhou UniversityLanzhou 730000 PRC department of physics Peking University Beijing 100871 PRC Institutfr

The application of high pressure to condensed matter is becoming a powerful tool for discovering new states of materials and understanding the physics connecting with high pressure phenomena. In order to inspect the local properties of solids under pressure, hyperfine interactions, magnetic ordering and lattice dynamics can be studied by using the

关键词： high pressure Mssbauer spectroscopy cubic Laves phase.

Atmospheric and ecosystem big data providing key contributions in reaching United Nations’Sustainable Development Goals

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Big Earth Data 2021年第3期5卷 277-305页

作者： Markku Kulmala Anna Lintunen Ilona Ylivinkka Janne Mukkala Rosa Rantanen Joni Kujansuu Tuukka Petäjä Hanna K.Lappalainen Institute for Atmospheric and Earth System Research(INAR)/physics Faculty of ScienceUniversity of HelsinkiFinland Joint International Research Laboratory of Atmospheric and Earth System sciences School of Atmospheric SciencesNanjing UniversityNanjingChina Aerosol and Haze Laboratory Beijing Advanced Innovation Center for Soft Matter Sciences and EngineeringBeijing University of Chemical Technology(BUCT)BeijingChina Faculty of Geography Lomonosov Moscow State UniversityMoscowRussia Tyumen State University Department of CryosphereTyumenRussia fGuangzhou Institute of Geography Guangzhou Academy of SciencesGuangzhouChina Institute for Atmospheric and Earth System Research University of Helsinki Finland Aerospace Information Research Institute Chinese Academy of SciencesBeijingChina

Big open data comprising comprehensive,long-term atmospheric and ecosystem in-situ observations will give us tools to meet global grand challenges and to contribute towards sustainable *** Nations’Sustainable Development Goals(UN SDGs)provide framework for the *** present synthesis on how Station for Measuring Earth Surface-Atmosphere Relations(SMEAR)observation network can contribute to UN *** describe SMEAR II flagship station in Hyytiälä,*** more than 1200 variables measured in an integrated manner,we can under-stand interactions and feedbacks between biosphere and *** contributes towards understanding impacts of climate change to natural ecosystems and feedbacks from ecosys-tems to *** benefits of SMEAR concept are highlighted through outreach project in Eastern Lapland utilizing SMEAR I observations from Värriöresearch *** contrast to boreal environment,SMEAR concept was also deployed in *** underline the benefits of comprehensive observations to gain novel insights into complex interactions between densely popu-lated urban environment and *** observations enable work towards solving air quality problems and improve the quality of life inside *** network of comprehensive stations with various measurements will enable science-based deci-sion making and support sustainable development by providing long-term view on spatio-temporal trends on atmospheric compo-sition and ecosystem parameters.

关键词： Grand challenges in-situ observations big open data SMEAR concept SDGs

Results of dark matter search using the full PandaX-Ⅱ exposure

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Chinese physics C 2020年第12期44卷 184-200页

作者： Qiuhong Wang Abdusalam Abdukerim Wei Chen Xun Chen Yunhua Chen Chen Cheng Xiangyi Cui Yingjie Fan Deqing Fang Changbo Fu Mengting Fu Lisheng Geng Karl Giboni Linhui Gu Xuyuan Guo Ke Han Changda He Di Huang Yan Huang Yanlin Huang Zhou Huang Xiangdong Ji Yonglin Ju Shuaijie Li Huaxuan Liu Jianglai Liu Wenbo Ma Yugang Ma Yajun Mao Yue Meng Kaixiang Ni Jinhua Ning Xuyang Ning Xiangxiang Ren Changsong Shang Lin Si Guofang Shen Andi Tan Anqing Wang Hongwei Wang Meng Wang Siguang Wang Wei Wang Xiuli Wang Zhou Wang Mengmeng Wu Shiyong Wu Weihao Wu Jingkai Xia Mengjiao Xiao Pengwei Xie Binbin Yan Jijun Yang Yong Yang Chunxu Yu Jumin Yuan Ying Yuan Xinning Zeng Dan Zhang Tao Zhang Li Zhao Qibin Zheng Jifang Zhou Ning Zhou Xiaopeng Zhou INPAC and School of physics and Astronomy Shanghai Jiao Tong UniversityMOE Key Lab for Particle PhysicsAstrophysics and CosmologyShanghai Key Laboratory for Particle Physics and CosmologyShanghai 200240China Shanghai Institute of Applied physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of sciences Beijing 100049China Shanghai Jiao Tong University Sichuan Research Institute Chengdu 610213China Yalong River Hydropower Development Company Ltd.288 Shuanglin RoadChengdu 610051China School of physics Sun Yat-Sen UniversityGuangzhou 510275China Tsung-Dao Lee Institute Shanghai 200240China School of physics Nankai UniversityTianjin 300071China Key Laboratory of Nuclear physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China School of physics Peking UniversityBeijing 100871China School of physics Beihang UniversityBeijing 100191China International Research Center for Nuclei and Particles in the Cosmos&Beijing Key Laboratory of Advanced Nuclear materials and physics Beihang UniversityBeijing 100191China School of Medical Instrument and Food Engineering University of Shanghai for Science and TechnologyShanghai 200093China department of physics University of MarylandCollege ParkMaryland 20742USA School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of physics and Key Laboratory of Particle physics and Particle Irradiation(MOE) Shandong UniversityJinan 250100China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China Center for High Energy physics Peking UniversityBeijing 100871China

We report the dark matter search results obtained using the full 132 ton·day exposure of the PandaX-II experiment,including all data from March 2016 to August *** significant excess of events is identified above the expected *** limits are set on the spin-independent dark matter-nucleon *** lowest 90%confidence level exclusion on the spin-independent cross section is 2.2×10−46 cm2 at a WIMP mass of 30 GeV/c2.

关键词： dark matter direct detection liquid xenon