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A Resonant Model for Charge transfer and Excitation in Proton-Hydrogen Collisions

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Chinese physics Letters 1994年第6期11卷 337-340页

作者： PAN Limin WANG Yansen HUANG Fayang FANG Dufei tANG Jiayong YANG Fujia t.4.lee physics laboratory and department of nuclear science fudan universityshanghai 200433

A new and simple model is developed to describe charge transfer,excitation and elastic process in low energy ion-atom collision in which the resonant transfer is considered as the dominant *** formulas are given in the secondary quantum *** cross sections of electron capture,excitation and elastic process in proton-hydrogen atom collision have been calculated and compared with experiment data.

关键词： representation mechanism excitation

Width of Soliton and the Electron Correlation in Polymer

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Chinese physics Letters 1996年第3期13卷 211-214页

作者： MA Yun-sheng WU Chang-qin FU Rou-li SUN Xin t.4.lee laboratory and department of physics fudan universityshanghai 200433 national laboratory of infrared physics chinese academy of sciencesshanghai 200083

the effect of electron correlation on the width of the soliton in polymer is *** theory shows that the screening plays a key role in the effect of electron correlation on the width of soliton:In weak screenings the width of soliton is reduced by the electron-electron interaction;whereas,,in strong screenings it will be *** physical reason is given at the end.

关键词： soliton Electron Soliton

Vector meson's spin alignments in high energy reactions

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Science China(physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 5-20页

作者： Jin-Hui Chen Zuo-tang Liang Yu-Gang Ma Xin-Li Sheng Qun Wang Key laboratory of Nuclear physics and Ion-beam Application (MoE) Institute of Modern PhysicsFudan University Institute of Frontier and Interdisciplinary Science Key Laboratory of Particle Physics and Particle Irradiation (MOE)Shandong University INFN-Firenze department of Modern physics University of Science and Technology of China School of Mechanics and physics Anhui University of Science and Technology

the global spin alignment of vector mesons has been observed by the StAR collaboration at the Relativistic Heavy Ion Collider （RHIC） at Brookhaven National laboratory （BNL）.It provides a unique opportunity to probe the correlation between the polarized quark and antiquark in the strongly coupled quark-gluon plasma （sQGP） produced in relativistic heavy ion collisions,opening a new window to explore the properties of s *** addition,spin alignments of vector mesons have also been observed in other high-energy particle collisions such as e+e-annihilations at high energies where hadron production is dominated by quark fragmentation *** results obtained are quite different from those obtained in heavy ion collisions where quark coalescence/combination mechanism dominates suggesting strong dependence on hadronization *** comprehensive studies in different hadronization processes are *** this article,we present a brief review of theoretical and experimental advances in the study of vector meson’s spin alignments in a variety of high-energy particle collisions,with emphasis on hadronization mechanisms.

关键词： vector meson spin alignment global polarization relativistic heavy ion collisions fragmentation

Effects of Off-Diagonal Electron-Electron Interactions on Exciton Energies in C_(60)

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Chinese physics Letters 1996年第11期13卷 863-866页

作者： RAO Xue-song ZHAO Hua FU Rou-li SUN Xin KNASU t.4.lee laboratory and department of physics fudan universityshanghai 200433 and national laboratory of infrared physicschinese academy of sciencesshanghai200083 national laboratory for high energy physics tsukubaibaraki 305japan

Since the neighboringπorbits in C_(60) are well overlapped,the off-diagonal part of electron interaction plays an important *** this paper,the effects of the off-diagonal electron interactions on the exciton energies in C_(60) are studied by using the single configuration interaction *** is found that the binding energies of the low-lying singlet and triplet excitons depend sensitively upon the off-diagonal interactions which compete against the diagonal interactions and suppress the binding of the *** implication of these features is discussed.

关键词： diagonal Electron interaction

Einstein Probe discovery of EP240408a: A peculiar X-ray transient with an intermediate timescale

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Science China(physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 222-240页

作者： Wenda Zhang Weimin Yuan Zhixing Ling Yong Chen Nanda Rea Arne Rau Zhiming Cai Huaqing Cheng Francesco Coti Zelati Lixin Dai Jingwei Hu Shumei Jia Chichuan Jin Dongyue Li Paul O’Brien Rongfeng Shen Xinwen Shu Shengli Sun Xiaojin Sun Xiaofeng Wang Lei Yang Bing Zhang Chen Zhang Shuang-Nan Zhang Yonghe Zhang Jie An David Buckley Alexis Coleiro Bertrand Cordier Liming Dou Rob Eyles-Ferris Zhou Fan Hua Feng Shaoyu Fu Johan P.U.Fynbo Lluis Galbany Saurabh W.Jha Shuaiqing Jiang Albert Kong Erik Kuulkers Weihua Lei Wenxiong Li Bifang Liu Mingjun Liu Xing Liu Yuan Liu Zhu Liu Chandreyee Maitra Alessio Marino Itumeleng Monageng Kirpal Nandra Jeremy Sanders Roberto Soria Lian tao Junfeng Wang Song Wang tinggui Wang Zhongxiang Wang Qingwen Wu Xuefeng Wu Dong Xu Yanjun Xu Suijian Xue Yongquan Xue Zijian Zhang Zipei Zhu Hu Zou Congying Bao Fansheng Chen Houlei Chen tianxiang Chen Wei Chen Yehai Chen Yifan Chen Chenzhou Cui Weiwei Cui Yanfeng Dai Dongwei Fan Ju Guan Dawei Han Dongjie Hou Haibo Hu Maohai Huang Jia Huo Zhenqing Jia Bowen Jiang Ge Jin Chengkui Li Junfei Li Longhui Li Maoshun Li Wei Li Zhengda Li tianying Lian Congzhan Liu Heyang Liu Huaqiu Liu Fangjun Lu Laidan Luo Jia Ma Xuan Mao Haiwu Pan Xin Pan Liming Song Hui Sun Yunyin tan Qingjun tang Yihan tao Hao Wang Juan Wang Lei Wang Wenxin Wang Yilong Wang Yusa Wang Qinyu Wu Haitao Xu Jingjing Xu Xinpeng Xu Yunfei Xu Zhao Xu Changbin Xue Yulong Xue Ailiang Yan Haonan Yang Xiongtao Yang Yanji Yang Juan Zhang Mo Zhang Wenjie Zhang Zhen Zhang Zhen Zhang Ziliang Zhang Donghua Zhao Haisheng Zhao Xiaofan Zhao Zijian Zhao Hongyan Zhou Yilin Zhou Yuxuan Zhu Zhencai Zhu National Astronomical Observatories Chinese Academy of Sciences School of Astronomy and Space Sciences University of Chinese Academy of Sciences Key laboratory of Particle Astrophysics Institute of High Energy physics Chinese Academy of Sciences Institute of Space Sciences (ICE) CSIC Institut d’Estudis Espacials de Catalunya (IEEC) Max Planck Institute for Extraterrestrial physics Innovation Academy for Microsatellites Chinese Academy of Sciences department of physics University of Hong Kong School of physics and Astronomy University of Leicester School of physics and Astronomy Sun Yat-sen University department of physics Anhui Normal University Shanghai Institute of technical physics Chinese Academy of Sciences physics department tsinghua University Nevada Center for Astrophysics University of Nevada Las Vegas department of physics and Astronomy University of Nevada Las Vegas South African Astronomical Observatory department of Astronomy University of Cape town department of physics University of the Free State Université Paris Cité CNRS Astroparticule et Cosmologie Université Paris Cité CEA Paris-Saclay IRFU/DAp-AIM department of Astronomy Guangzhou University Cosmic Dawn Center (DAWN) Niels Bohr Institute University of Copenhagen department of physics and Astronomy Rutgers the State University of New Jersey Institute for Cosmic Ray Research the University of tokyo ESA/EStEC department of Astronomy School of physics Huazhong University of Science and technology INAF-Osservatorio Astrofisico di torino Sydney Institute for Astronomy School of physics the University of Sydney department of Astronomy Xiamen University Institute for Frontiers in Astronomy and Astrophysics Beijing Normal University department of Astronomy University of Science and technology School of Astronomy and Space Sciences University of Science and technology of China Institute of Deep Space Sciences Deep Space Exploration laboratory department of Astronomy School of physics and Astronomy Yunnan University Shanghai Astronomical Observatory Chi

We report the discovery of a peculiar X-ray transient,EP240408a,by Einstein Probe （EP） and follow-up studies made with EP,Swift,NICER,GROND,AtCA and other ground-based multiwavelength *** new transient was first detected with Wide-field X-ray telescope （WXt） on board EP on April 8th,2024,manifested in an intense yet brief X-ray flare lasting for *** flare reached a peak flux of 3.9×10-9erg cm-2s-1in 0.5-4 ke V,～300 times brighter than the underlying X-ray emission detected throughout the *** and more precise follow-up observations by EP/FXt,Swift and NICER confirmed the finding of this new *** X-ray spectrum is non-thermal in 0.5-10 ke V,with a power-law photon index varying *** X-ray light curve shows a plateau lasting for ～4 d,followed by a steep decay till becoming undetectable ～10 d after the initial *** on its temporal property and constraints from previous EP observations,an unusual timescale in the range of 7-23 d is found for EP240408a,which is intermediate between the commonly found fast and long-term *** counterparts have been found in optical and near-infrared,with the earliest observation at 17 h after the initial X-ray detection,suggestive of intrinsically weak emission in these *** demonstrate that the remarkable properties of EP240408a are inconsistent with any of the transient types known so far,by comparison with,in particular,jetted tidal disruption events,gamma-ray bursts,X-ray binaries and fast blue optical *** nature of EP240408a thus remains an *** suggest that EP240408a may represent a new type of transients with intermediate timescales of the order of～10 *** detection and follow-ups of more of such objects are essential for revealing their origin.

关键词： X-ray transients ${\bm~{Einstein~~Probe}}$

Boosting hydrocarbon conversion via Cu-doping induced oxygen vacancies on CeO2 in CO2 electroreduction

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Journal of Energy Chemistry 2025年第1期100卷 66-76页

作者： Lei Xue tong Shi Chenhui Han Heng Zhang Fenrong Liu Haorun Li Yan Wang Xiaojun Gu Shanghong Zeng Inner Mongolia Key laboratory of Chemistry and physics of Rare Earth Materials School of Chemistry and Chemical Engineering Inner Mongolia University State Key laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Institute of Catalysis Department of Chemistry Zhejiang University National Key laboratory of Baiyunobo Rare Earth Resource Research and Comprehensive Utilization Baotou Research Institute of Rare Earths

Conversion of CO2back to hydrocarbons is the most direct way of closing the“carbon cycle”,and its significance is further enlarged if this process is driven by renewable energies such as ***,precisely controlling the product selectivity towards hydrocarbons against the competitive hydrogen evolution remains challenging,especially for Cu-based ***,we report a novel defect engineering strategy,by which Cu-doping-induced oxygen vacancies on CeO2nanorods were effectively created,with adjustable vacancy/Cu *** resulting optimum catalyst shows up to 79% catalytic current density to hydrocarbons （excluding CO）,with 49% faradaic efficiency to *** and density functional theory unveil that the ratio between oxygen vacancy and Cu affects significantly the formation of*CHO and activation of H2O,which leads to the following deep hydrogenation to *** findings may spur new insights for designing and developing more controllable chemical process relevant to CO2utilization.

关键词： Oxygen vacancy Hydrocarbon production Reaction mechanism

Increase in the variability of terrestrial carbon uptake in response to enhanced future ENSO modulation

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Atmospheric and Oceanic Science Letters 2025年第1期18卷 32-38页

作者： Younong Li Li Dan Jing Peng Qidong Yang Fuqiang Yang Key laboratory of Regional Climate-Environment for temperate East Asia Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina Key laboratory of Atmospheric Environment and Processes in the Boundary Layer over the Low-Latitude Plateau Region Department of Atmospheric ScienceYunnan UniversityKunmingChina

El Niño-Southern Oscillation(ENSO)is a major driver of climate change in middle and low latitudes and thus strongly influences the terrestrial carbon cycle through land-air *** the ENSO modulation and carbon flux variability are projected to increase in the future,but their connection still needs further *** investigate the impact of future ENSO modulation on carbon flux variability,this study used 10 CMIP6 earth system models to analyze ENSO modulation and carbon flux variability in middle and low latitudes,and their relationship,under different scenarios simulated by CMIP6 *** results show a high consistency in the simulations,with both ENSO modulation and carbon flux variability showing an increasing trend in the *** higher the emissions scenario,especially SSP5-8.5 compared to SSP2-4.5,the greater the increase in *** flux variability in the middle and low latitudes under SSP2-4.5 increases by 30.9%compared to historical levels during 1951-2000,while under SSP5-8.5 it increases by 58.2%.Further analysis suggests that ENSO influences mid-and low-latitude carbon flux variability primarily through *** occurrence may potentially be attributed to the increased responsiveness of gross primary productivity towards regional temperature fluctuations,combined with the intensified influence of ENSO on land surface temperatures.

关键词： Carbon variability ENSO modulation CMIP6 models

A Lattice Boltzmann Boundary Condition at Impermeable Boundaries

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Chinese physics Letters 1997年第12期14卷 912-915页

作者： FANG Hai-ping LIN Zhi-fang tAO Rui-bao t.D.lee physics laboratory and department of physics fudan universityshanghai 200433

A hydrodynamic boundary condition for the lattice Boltzmann model at impermeable boundaries is *** boundary condition satisfies both the no-slip condition and the fluid conservation at boundary *** flow and Couette fl... 详细信息

关键词： boundary flow satis

Influence of the Size Distribution of Particles on the Viscous Property of an Electrorheological Fluid

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Chinese physics Letters 1997年第2期14卷 151-154页

作者： WANG Zuo-wei LIN Zhi-fang tAO Rui-bao t.D.lee physics laboratory and department of physics Fudan UniversityShanghai 200433

the influence of the size distribution of particles on the viscous property of an electrorheological fluid has been investigated by the molecular dynamic simulation *** shear stress of the fluid is found to decrease with the increase of the variance σ^(2) of the Gaussian distribution of the particle size,and then reach a steady value whenσis larger than *** phenomenon is attributed to the influence of the particle size distribution on the dynamic structural evolution in the fluid as well as the strength of the different chain-like structures formed by the particles.

关键词： particles. method. distribution