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The effect of symmetry potential on the balance energy of light particles emitted from mass symmetric heavy-ion collisions with isotopes,isobars and isotones

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Science China(Physics,Mechanics & Astronomy) 2012年第12期55卷 2407-2413页

作者： WANG YongJia guo chenchen LI QingFeng ZHANG HongFei School of Science Huzhou Teachers CollegeHuzhou 513000China School of Nuclear Science and Technology Lanzhou University Lanzhou 730000China College of Nuclear Science and Technology Beijing Normal UniversityBeijing 100875China

Using the Ultrarelativistic Quantum Molecular Dynamics(UrQMD) model,the balance energies of free neutrons,free protons and Z=1 particles(including free protons,deuterons and tritons) from mass symmetric heavy-ion collisions with isotopes,isobars and isotones are *** influence of nuclear symmetry potential energy on the balance energy is *** is found that the balance energy of free neutrons is sensitive to the nuclear symmetry energy,while that of free protons is ***,the initial neutron/proton ratio dependence of the balance energy of free neutrons from Sn isotopes can be taken as a useful probe to constrain the stiffness of the nuclear symmetry energy.

关键词： symmetry energy directed flow balance energy

Influence of the time-step on the production of free nucleons and pions from heavy-ion collisions around 1 GeV/nucleon

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Science China(Physics,Mechanics & Astronomy) 2016年第12期59卷 40-46页

作者： LiYan Zou Miao Li chenchen guo YongJia Wang QingFeng Li Ling Liu School of Science Huzhou University College of Physics Science and Technology Shenyang Normal University Shanghai Institute of Applied Physics Chinese Academy of Sciences Institute of Modern Physics Chinese Academy of Sciences

By considering different values of the time-step for the potential updates in the ultra-relativistic quantum molecular dynamics(UrQMD) model, we examine its influence on observables, such as the yield and collective flow of nucleons and pions from heavyion collisions around 1 GeV/nucleon. It is found that these observables are affected to some extent by the choice of the time-step,and the impact of the time-step on the pion-related observables is more visible than that on the nucleon-related ones. However,its effect on the π-/π+yield ratio and elliptic flow difference between neutrons and protons, which have been taken as sensitive observables for probing the density-dependent nuclear symmetry energy at high densities, is fairly weak.

关键词： UrQMD model symmetry energy at supranormal densities mean-field potential updates

Comparison between nuclear thermometers in central Xe+Sn collision

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Nuclear Science and Techniques 2013年第5期24卷 67-70页

作者： guo chenchen SU Jun ZHANG Fengshou The Key Laboratory of Beam Technology and Material Modification of Ministry of Education College of Nuclear Science and TechnologyBeijing Normal University Beijing Radiation Center Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator of Lanzhou

The temperature of fragmenting source in central heavy-ion collisions at Fermi energy is investigated by the isospin-dependent quantum molecular dynamics model in combination with the statistical decay model *** different nuclear thermometers are used to extract nuclear *** find that the He and Li isotope temperature reaches a plateau at about 70-100 MeV/nucleon of beam *** slope temperature and the quadrupole fluctuation temperature give high *** quantum slope temperature and the quantum quadrupole fluctuation temperature are more close to the He and Li isotope temperatures.

关键词：重离子碰撞温度计量子分子动力学模型中央 GEMINI 同位旋相关模型组合费米能级

Phosphorous-doped carbon nanotube/reduced graphene oxide aerogel cathode enabled by pseudocapacitance for high energy and power zinc-ion hybrid capacitors

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Chinese Chemical Letters 2024年第2期35卷 570-576页

作者： Junjun Yao Fuzhi Li Ruyi Zhou chenchen guo Xinru Liu Yirong Zhu Hunan Key Laboratory of Green Metallurgy and New Energy Materials College of Materials and Advanced ManufacturingHunan University of TechnologyZhuzhou 412007China College of packaging and Material Engineering Hunan University of TechnologyZhuzhou 412007China

The design and development of energy storage device with high energy/power density has become a research ***-ion hybrid capacitors(ZHCs)are considered as one of the most promising ***,the application of ZHCs is hindered by their low energy density at high power density due to the unsatisfactory cathode *** this study,a novel 3D phosphorus-doped carbon nanotube/reduced graphene oxide(P-CNT/rGO)aerogel cathode is synthesized through a synergistic modification strategy of CNT insertion and P doping modification combined with 3D porous *** as-obtained P-CNT/rGO aerogel cathode manifests significantly increased surface aera,expanded interlayer spacing,and enhanced pseudocapacitance behavior,thus leading to significantly enhanced specific capacitance and superb ions transport *** as-assembled ZHC based on P-CNT/rGO cathode delivers a superior energy density of 42.2 Wh/kg at an extreme-high power density of 80 kW/kg and excellent cycle ***-depth kinetic analyses are undertaken to prove the enhanced pseudocapacitance behavior and exceptional power output capability of ***,the reaction mechanism of physical and chemical adsorption/desorption of electrolyte ions on the P-CNT/rGO cathode is revealed by systematic ex-situ *** work can provide a valuable reference for developing advanced graphene-based cathode for high energy/power density ZHCs.

关键词： Graphene aerogel Phosphorus doping Pseudocapacitance Zinc-ion hybrid capacitors Energy storage mechanism

Influence of the symmetry energy on the balance energy of the directed flow

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Science China(Physics,Mechanics & Astronomy) 2012年第2期55卷 252-259页

作者： guo chenchen WANG YongJia LI QingFeng TRAUTMANN W LIU Ling WU LiJuan School of Science Huzhou Teachers CollegeHuzhou 313000China College of Physics Science&Technology Shenyang Normal UniversityShenyang 110034China School of Nuclear Science and Technology Lanzhou UniversityLanzhou 730000China GSI Helmholtzzentrum fuer Schwerionenforschung GmbH Darmstadt D-64291Germany

The influence of the density-dependent symmetry energy on the balance energy （Ebal） of directed flow from heavy ion collisions （HICs） at incident energies covered by INDRA and MSU experiments is studied, using the updated version of the ultra- relativistic quantum molecular dynamics （UrQMD） model, especially adapted to low-energy heavy ion collisions （HICs）. Four mass-symmetric reactions with total mass numbers between 192 and 394 are chosen for investigating the influence of the symmetry energy on the system-mass dependence of Eual. The results show that the uncertainty in the density dependence of the symmetry potential causes changes of Ebal of the order of several MeV, depending on the type of particle considered. The Ebal of neutrons from HICs is particularly sensitive to the density dependence of the symmetry potential energy, while the system-mass dependence of EbaI of Z = 1 particles is not.

关键词： symmetry energy directed flow balance energy

Isospin dependence of projectile fragmentation at hundreds of MeV/u

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Chinese Physics C 2020年第8期44卷 155-163页

作者： Jun Su Long Zhu chenchen guo Feng-Shou Zhang Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China The Key Laboratory of Beam Technology and Material Modification of Ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China Beijing Radiation Center Beijing 100875China Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator of LanzhouLanzhou 730000China

By modeling the fragmentation process using a dynamic model and permitting only evaporation in the statistical code,the main features of a projectile fragmentation at 600 MeV/u were considered in our previous study[***.C,98:014610(2018)].In this study,we extend this to the isospin dependence of a projectile fragmentation at several hundreds of MeV/*** searched for isospin observables related to the isospin fractionation to extract the symmetry energy,and found that at the pre-equilibrium stage of the collisions an isospin diffusion will take place and affect the isospin of the final *** isospin fractionation plays a part during the fragmenting *** to the soft symmetry energy,the stiff symmetry energy provides a smaller repulsive force for neutrons and an attractive force for the protons in a neutron-rich system at a subnormal density,and hence causes a smaller isospin asymmetry of the gas phase,leaving a more neutron-rich liquid *** observable robust isospin is proposed to extract the slope of the symmetry energy at normal density based on the isospin dependence of the projectile fragmentation at hundreds of MeV/u.

关键词： projectile fragmentation symmetry energy isospin-dependent quantum molecular dynamics isospin fractionation

A mesenchymal-like subpopulation in non-neuroendocrine SCLC contributes to metastasis

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Journal of Genetics and Genomics 2021年第7期48卷 571-581页

作者： Yujuan Jin Tian Xiao Yan Feng Jinhua Yang chenchen guo Liang Hu Hongbin Ji State Key Laboratory of Cell Biology Chinese Academy of SciencesShanghai 200031China Shanghai Institute of Biochemistry and Cell Biology Chinese Academy of SciencesShanghai 200031China Center for Excellence in Molecular Cell Science Chinese Academy of SciencesShanghai 200031China Shenzhen Key Laboratory of Translational Medicine of Tumor Department of Cell Biology and GeneticsShenzhen University Health Sciences CenterShenzhenGuangdong 518060China University of Chinese Academy of Sciences Beijing 100049China School of Life Science Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China

Small cell lung cancer(SCLC)is the most aggressive lung cancer with high *** SCLC cells derived from the Rb1L/L/Trp53L/L(RP)autochthonous mouse model grew as adhesion or suspension in cell culture,and the adhesion cells are defined as non-neuroendocrine(non-NE)SCLC ***,we uncover the heterogenous subpopulations within the non-NE cells and referred to them as mesenchymallike(Mes)and epithelial-like(Epi)SCLC *** Mes cells have increased capability to form colonies in soft agar and harbored stronger metastatic capability in vivo when compared with the Epi *** Set Enrichment Analysis reveals that the transforming growth factor(TGF)-βsignaling is enriched in the Mes ***,inhibition of the TGF-βsignaling through ectopic expression of dominant-negative Tgfbr2(Tgfbr2-DN)or treatment with Tgfbr1 inhibitor SD-208 consistently abrogates tumor metastasis in nude mouse allograft ***,genetic deletion of Tgfbr2 or Smad4,the key components of the TGF-βsignaling pathway,dramatically attenuates SCLC metastasis in the RP autochthonous mouse ***,our results uncover the high heterogeneity in non-NE SCLC cells and highlight an important role of TGF-βsignaling in promoting SCLC metastasis.

关键词： Small cell lung cancer Heterogeneity Metastasis TGF-b signaling

PI3K/Akt/mTOR signaling orchestrates the phenotypic transition and chemo-resistance of small cell lung cancer

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Journal of Genetics and Genomics 2021年第7期48卷 640-651页

作者： Xuefeng Li Cheng Li chenchen guo Qiqi Zhao Jiayu Cao Hsin-Yi Huang Meiting Yue Yun Xue Yujuan Jin Liang Hu Hongbin Ji State Key Laboratory of Cell Biology Shanghai Institute of Biochemistry and Cell BiologyCenter for Excellence in Molecular Cell ScienceChinese Academy of SciencesShanghai 200031China University of Chinese Academy of Sciences Beijing 100049China Department of Medical Oncology The First Affiliated HospitaHengyang MedicalSchoolUniversity of South ChinaHengyangHunan 421001China School of Life Science and Technology Shanghai Tech UniversityShanghai 200120China CAS Key Laboratory of Computational Biology CAS-MPG Partner Institute for Computational BiologyShanghai Institute of Nutrition and HealthShanghai Institutes for Biological SciencesChinese Academy of SciencesShanghai 200031China School of Life Science Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China

Small cell lung cancer(SCLC)is a phenotypically heterogeneous disease with an extremely poor prognosis,which is mainly attributed to the rapid development of resistance to ***,the relation between the growth phenotypes and chemo-resistance of SCLC remains largely *** comprehensive bioinformatic analyses,we found that the heterogeneity of SCLC phenotype was significantly associated with different sensitivity to *** or semiadherent SCLC cells were enriched with activation of the PI3K/Akt/mTOR pathway and were highly ***,activation of the PI3K/Akt/mTOR pathway promotes the phenotypic transition from suspension to adhesion growth pattern and confers SCLC cells with *** chemo-resistance could be largely overcome by combining chemotherapy with PI3K/Akt/mTOR pathway *** findings support that the PI3K/Akt/mTOR pathway plays an important role in SCLC phenotype transition and chemo-resistance,which holds important clinical implications for improving SCLC treatment.

关键词： SCLC Heterogeneity Growth pattern Phenotype transition Drug resistance PI3K/Akt/mTOR pathway

A theoretical investigation of the dramatic effect of the chain length on the intramolecular radical anion cycloadditions of bis（enones）

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A theoretical investigation of the dramatic effect of the ch...