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Design and construction of charged-particle telescope array for study of exotic nuclear clustering structure

Nuclear Science and Techniques 2024年第8期35卷 114-123页

作者： Zheng‑Li Liao Xi‑Guang Cao Yu‑Xuan Yang Chang‑Bo Fu xian‑gai deng Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China Zhengzhou University Zhengzhou 450001China Key Laboratory of Nuclear Physics and Ion‑beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China Shanghai Research Center for Theoretical Nuclear Physics NSFC and Fudan University Shanghai 200438China

The exploration of exotic shapes and properties of atomic nuclei,e.g.,αcluster and toroidal shape,is a fascinating field in nuclear *** study the decay of these nuclei,a novel detector aimed at detecting multipleα-particle events was designed and *** detector comprises two layers of double-sided silicon strip detectors(DSSD)and a cesium iodide scintillator array coupled with silicon photomultipliers array as light sensors,which has the advantages of their small size,fast response,and large dynamic *** coupled with cesium iodide crystal arrays are used to distinguish multipleα*** detector array has a compact and integrated design that can be adapted to different experimental *** detector array was simulated using Geant4,and the excitation energy spectra of someα-clustering nuclei were reconstructed to demonstrate the *** simulation results show that the detector array has excellent angular and energy resolutions,enabling effective reconstruction of the nuclear excited state by multipleαparticle *** detector offers a new and powerful tool for nuclear physics experiments and has the potential to discover interesting physical phenomena related to exotic nuclear structures and their decay mechanisms.

关键词： Cluster decay Toroidal structure Telescope array SiPM Energy resolution

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Density fluctuations in intermediate-energy heavy-ion collisions

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Nuclear Science and Techniques 2022年第5期33卷 1-7页

作者： Cong Liu xian-gai deng Yu-Gang Ma Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China Shanghai Research Center for Theoretical Nuclear Physics NSFC and Fudan UniversityShanghai 200438China

Within the framework of the isospin-dependent quantum molecular dynamics model,we simulate^(129)Xe+^(119)Sn collisions in an incident energy range of 20 to 190MeV/nucleon and discuss the liquid-gas phase transition with density *** comparison,we also extract the effective Fisher parameter τ_(eff),multiplicity of intermediate-mass fragments(IMFs),and information *** is found that the Fisher parameter and maximum information entropy of collisions have peak values at E_(beam)=50-80 MeV/*** addition,the maximum multiplicity of IMFs has a plateau around 70 MeV/*** higher-order density moments in a larger central region of[-5,5]^(3) fm^(3) in the collision system,a maximum plateau also appears as function of beam energy at energies exceeding 70 MeV/*** observables,which are consistent with each other,indicate a liquid-gas phase transition around 70 MeV/nucleon for the^(129)Xe+^(119)Sn system.

关键词： Heavy-ioncollisions Liquid-gasphase transition IQMD Density moment Intermediatemass fragment Informationentropy Fisher-lawparameter

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Electromagnetic field effects on nucleon transverse momentum for heavy ion collisions around 100 A MeV

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Nuclear Science and Techniques 2017年第12期28卷 255-261页

作者： xian-gai deng Yu-Gang Ma Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China ShanghaiTech University Shanghai 200031China

With taking electromagnetic field into account for the transport model of Boltzmann-Uehling-Uhlenbeck,electromagnetic effects are studied for ^(208)Pb +^(208)Pb collisions around 100A MeV. Electromagnetic field evolution during the collisions was estimated. It was found that the electric field has an obvious effect on the transverse momentum(p_T) spectra of nucleons during heavy ion collisions, and leads to different minimum position for the peak of p_T spectra of nucleons versus beam energy when the electric field is switched on. For the magnetic field, it affects the z-axis direction distributions of nucleons for central heavy ion collisions at lower energy.

关键词： Heavy ion collision Electromagnetic field Transverse momentum

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Telomere-to-telomere genome of the allotetraploid legume Sesbania cannabina reveals transposon-driven subgenome divergence and mechanisms of alkaline stress tolerance

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Science China(Life Sciences) 2024年第1期67卷 149-160页

作者： Haofei Luo Xiaofei Wang Changqing You Xuedan Wu Duofeng Pan Zhiyao Lv Tong Li Dongmei Zhang Zhongbao Shen Xiaodong Zhang Guodao Liu Kaixuan He Qingtong Ye Yajun Jia Qinghua Zhao xian deng Xiaofeng Cao xianwei Song gai Huang State Key Laboratory of Plant Genomics and National Center for Plant Gene Research Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China Hainan Yazhou Bay Seed Lab Sanya 572025China University of Chinese Academy of Sciences Beijing 100049China Institute of Forage and Grassland Sciences Heilongjiang Academy of Agricultural SciencesHarbin 150086China Shandong Academy of Agricultural Sciences Jinan 250100China National Center of Technology Innovation for Comprehensive Utilization of Saline-Alkali Land Dongying 257345China Shandong Green Manure Ecological Technology Co. LtdDongying 257345China State Key Laboratory of Tropical Crop Breeding Chinese Academy of Tropical Agricultural SciencesHaikou 571101China

Alkaline soils pose an increasing problem for agriculture worldwide,but using stress-tolerant plants as green manure can improve marginal ***,we show that the legume Sesbania cannabina is very tolerant to alkaline conditions and,when used as a green manure,substantially improves alkaline *** understand genome evolution and the mechanisms of stress tolerance in this allotetraploid legume,we generated the first telomere-to-telomere genome assembly of *** spanning~2,087 *** assembly included all centromeric regions,which contain centromeric satellite repeats,and complete chromosome ends with telomeric *** genome analysis distinguished A and B subgenomes,which diverged approximately 7.9 million years *** genomic analysis revealed that the chromosome homoeologs underwent large-scale inversion events(>10 Mb)and a significant,transposon-driven size expansion of the chromosome 5A *** further identified four specific alkali-induced phosphate transporter genes in ***;these may function in alkali tolerance by relieving the deficiency in available phosphorus in alkaline *** work highlights the significance of *** as a green tool to improve marginal lands and sheds light on subgenome evolution and adaptation to alkaline soils.

关键词： Sesbania cannabina alkaline stress telomere-to-telomere genome legume green manure phosphate transporter allotetraploid

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Measurement of Br(n,γ)cross sections up to stellar s-process temperatures at the CSNS Back‑n

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Nuclear Science and Techniques 2023年第11期34卷 226-241页

作者： Gao‑Le Yang Zhen‑Dong An Wei Jiang xian‑Kai Li Wei‑Wei Qiu Zheng‑Fa Liao Zi‑Yue Zhuang Xiao‑Ping Zhang Sheng‑Li Chen Chen‑Chen Guo Er‑Xi Xiao Xiao Fang Xin‑xiang Li Xin‑Rong Hu Bing Jiang Jin‑Cheng Wang Jie Ren Wen Luo Zhi‑Chao Zhu Hao‑Yang Lan Zong‑Wei Cao Xu Ma Ying‑Du Liu Pu‑Sen Wang Yi Yang Ping Su xian‑gai deng Wan‑Bing He Chun‑Wang Ma Yu‑Ting Wang Zhi‑Tao Dai Peng‑Qin He Ren‑Guang Tang Tao Zhou Jing Wang Han Yi Yue Zhang Yong‑Hao Chen Rui‑Rui Fan Ke‑Qing Gao Qiang Li Kang Sun Zhi‑Xin Tan Min‑Hao Gu Han‑Tao Jing Jing‑Yu Tang School of Physics and Astronomy Sun Yat-sen UniversityZhuhai 519082China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China State Key Laboratory of Lunar and Planetary Sciences Macao University of Science and TechnologyMacao 999078China CNSA Macao Center for Space Exploration and Science Macao 999078China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Spallation Neutron Source Science Center Dongguan 523803China School of Nuclear Science and Technology University of South ChinaHengyang 421001China Sino‑French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China School of Materials Science and Engineering Xiangtan UniversityXiangtan 411100China Key Laboratory of Nuclear Physics and Ion‑beam Application(MOE) Institute of Modern PhysicsDepartment of Nuclear Science and TechnologyFudan UniversityShanghai 200433China Institute of Particle and Nuclear Physics Henan Normal UniversityXinxiang 453007China School of Physics Henan Normal UniversityXinxiang 453007China Shenzhen Center Cancer hospitalChinese Academy of Medical SciencesShenzhen 518100China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China

The neutron capture cross sections(n,γ)of bromine were obtained using the time-of-flight technique at the Back-n facility of the China Spallation Neutron ***γ-rays originating from neutron-induced capture events were detected using four C_(6)D_(6) *** pulse-height weighting technique and double-bunch unfolding method based on Bayesian theory were used in the data *** deductions,normalization,and corrections were carefully considered to obtain reliable measurement *** multilevel R-matrix Bayesian code SAMMY was used to extract the resonance parameters in the resolved resonance region(RRR).The average cross sections in the unresolved resonance region(URR)were obtained from 10 to 400 *** experimental results were compared with data from several evaluated libraries and previous experi-ments in the RRR and *** TALYS code was used to describe the average cross sections in the *** astrophysical Maxwell average cross sections(MACSs)of ^(79,81)Br from kT=5 to 100 keV were calculated over a sufficiently wide range of neutron *** a thermal energy of kT=30 keV,the MACS value for ^(79)Br 682±68 mb was in good agreement with the KADoNiS v1.0 recommended *** contrast,the value of 293±29 mb for ^(81)Br was substantially higher than that of the evaluated database and the KADoNiS v1.0 recommended value.

关键词： Time-of-flight technique Neutron capture cross sections Maxwell average cross sections

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Yield ratio of neutrons to protons in 12C（d,n）13N and 12C（d,p）13C from 0.6 to 3 MeV

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Nuclear Science and Techniques 2019年第12期30卷 65-71页

作者： Wu-Jie Li Yu-Gang Ma Guo-Qiang Zhang xian-gai deng Mei-Rong Huang Aldo Bonasera De-Qing Fang Jian-Qing Cao Qi deng Yong-Qi Wang Qian-Tao Lei Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of the Chinese Academy of Sciences Beijing 100080China Key Laboratory of Nuclear Physics and Ion-Beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China College of Physics and Electronics Information Inner Mongolia University for NationalitiesTongliao 028000China Cyclotron Institute Texas A&M UniversityCollege StationTX 77843USA Laboratori Nazionali del Sud INFNvia Santa Sofia6295123 CataniaItaly

The neutron yield in the12C(d,n)13N reaction and the proton yield in the12C(d,p)13C reaction have been measured using deuteron beams of energies 0.6-3 *** deuteron beam is delivered from a 4-MeV electrostatic accelerator and bombarded on a thick carbon *** neutrons are detected at 0°,24°,and 48°and the protons at135°in the laboratory ***,the ratio of the neutron yield to the proton yield was *** can be used to effectively recognize the *** resonances are found at 1.4 MeV,1.7 MeV,and 2.5 MeV in the12C(d,p)13C reaction,and at 1.6 MeV and 2.7 MeV in the12C(d,n)13N *** proposed method provides a way to reduce systematic uncertainty and helps confirm more resonances in compound nuclei.

关键词： Proton neutron ratio 12C(d n) p) Trojan horse method(THM)

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云南曲靖下泥盆统“曲靖东方鱼”的分类学厘定

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古脊椎动物学报（中英文） 2024年第2期62卷 85-98页

作者：山显任朱敏李强盖志琨中国科学院古脊椎动物与古人类研究所中国科学院脊椎动物演化与人类起源重点实验室北京100044 中国科学院大学地球与行星科学学院北京100049 曲靖师范学院自然历史文化研究中心云南曲靖655011

“曲靖东方鱼”(‘Dongfangaspis qujingensis’)的归属长期以来存在争议,其最初被归入东方鱼属(Dongfangaspis),之后被归入宽甲鱼属(Laxaspis)。然而,由于宽甲鱼属模式种为曲靖宽甲鱼(Laxaspis qujingensis),这一分类学厘定又引起异物... 详细信息

“曲靖东方鱼”(‘Dongfangaspis qujingensis’)的归属长期以来存在争议,其最初被归入东方鱼属(Dongfangaspis),之后被归入宽甲鱼属(Laxaspis)。然而,由于宽甲鱼属模式种为曲靖宽甲鱼(Laxaspis qujingensis),这一分类学厘定又引起异物同名的问题。描述了来自云南曲靖早泥盆世洛赫考夫期西山村组的“曲靖东方鱼”和变异坝鱼(Damaspis vartus)的新材料。“曲靖东方鱼”在头甲长略大于宽,侧横管末端呈二分叉,V字型后眶上管不汇合,以及至少7条侧横管从侧背管发出等方面与变异坝鱼高度相似。这些相似之处表明,相较于宽甲鱼属和东方鱼属,“曲靖东方鱼”更接近坝鱼属。因此提出将“曲靖东方鱼”从宽甲鱼属中移除,归入坝鱼属。新标本表明变异坝鱼多出来第5对长的侧横管是该种的一个鉴别特征,而正型标本所呈现的非对称感觉管系统应为种内变异所造成。

关键词：云南曲靖下泥盆统西山村组盔甲鱼类多鳃鱼科坝鱼属

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基于可穿戴光电传感技术的去运动伪影脉率检测方法

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激光与红外 2024年第7期54卷 1102-1107页

作者：王雪丽单改仙高华方马旭国家卫生健康委科学技术研究所北京100081 战略支援部队特色医学中心北京100081

脉搏波是分析人体心血管系统生理状况的重要检测对象,可穿戴光电设备采集的脉搏信号常因人体运动而引入运动伪影,进而影响脉率检测结果的准确性,由于伪影的主要频率分量和光电信号频率相重叠,所以减少伪影有难度。针对现有脉率检测精度... 详细信息

脉搏波是分析人体心血管系统生理状况的重要检测对象,可穿戴光电设备采集的脉搏信号常因人体运动而引入运动伪影,进而影响脉率检测结果的准确性,由于伪影的主要频率分量和光电信号频率相重叠,所以减少伪影有难度。针对现有脉率检测精度不高、抗运动干扰能力不足问题,提出一种结合非线性自适应滤波和线性调频Z变换(CZT)的脉率检测方法。首先对光电容积脉搏波描记法(PPG)采集的信号预处理滤除高频干扰和基线漂移,然后选用微机电系统(MEMS)检测加速度信号作为参考信号,构建基于最小均方(LMS)的非线性自适应滤波器去除运动伪影,最后利用线性调频Z变换(CZT)对信号进行频谱分析计算脉率值。实验通过对10名受试者采集的实验数据进行性能评估,结果表明,该方法能有效从干扰脉搏波信号中恢复出原始信号,测得的受试者脉率平均绝对误差为1.96 bpm,具有较高的准确率和抗干扰能力。

关键词：可穿戴 CZT PPG MEMS LMS 脉率运动伪影

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PROTEIN S-ACYL TRANSFERASE 13/16 modulate disease resistance by S-acylation of the nucleotide binding,leucine-rich repeat protein R5L1 in Arabidopsis

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Journal of Integrative Plant Biology 2022年第9期64卷 1789-1802页

作者： Jin Gao gai Huang Xin Chen Yu-xian Zhu State Key Laboratory of Protein and Plant Gene Research College of Life SciencesPeking UniversityBeijing100871 China Institute for Advanced Studies Wuhan UniversityWuhan430072 China

Nucleotide binding,leucine-rich repeat(NB-LRR)proteins are critical for disease resistance in plants,while we do not know whether S-acylation of these proteins plays a role during bacterial *** identified 30 Arabidopsis mutants with mutations in NB-LRR encoding genes from the Nottingham Arabidopsis Stock Center and characterized their contribution to the plant immune response after inoculation with Pseudomonas syringae pv tomato DC3000(Pst DC3000).Of the five mutants that were hyper-susceptible to the pathogen,three(R5L1,R5L2 and RPS5)proteins contain the conserved S-acylation site in the N-terminal coiled-coil(CC)*** wild-type(WT)Arabidopsis plants,R5L1 was transcriptionally activated upon pathogen infection,and R5L1 overexpression lines had enhanced *** experiments indicated that R5L1 localized at the plasma membrane(PM)via S-acylation of its N-terminal CC domain,which was mediated by PROTEIN S-ACYL TRANSFERASE 13/16(PAT13,PAT16).Modification of the S-acylation site reduced its affinity for binding the PM,with a consequent significant reduction in bacterial *** localization of R5L1 was significantly reduced in pat13 and pat16 mutants,similar to what was found for WT plants treated with 2-bromopalmitate,an S-acylationblocking *** plants expressing R5L1 in the pat13 pat16 double mutant showed no enhanced disease *** of R5L1 in WT Arabidopsis resulted in substantial accumulation of reactive oxygen species after inoculation with Pst DC3000;this effect was not observed with a mutant R5L1 carrying a mutated Sacylation *** data suggest that PAT13-and PAT16-mediated S-acylation of R5L1 is crucial for its membrane localization to activate the plant defense response.

关键词： NB-LRR protein S-acyl transferases(PATs) Pst DC3000 S-acylation

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针刺联合血栓通与银杏叶提取物注射液治疗急性脑卒中临床观察

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中国中医药现代远程教育 2024年第6期22卷 130-132页

作者：方祖军李贤概周英华江西省万年县人民医院神经内科江西上饶335500

目的分析急性脑卒中患者采用针刺联合血栓通与银杏叶提取物注射液治疗的效果。方法回顾性选取2020年2月—2022年2月万年县人民医院急性脑卒中患者80例,依据应用方法分为针刺联合血栓通与银杏叶提取物注射液治疗组(联合用药组)、常规... 详细信息

目的分析急性脑卒中患者采用针刺联合血栓通与银杏叶提取物注射液治疗的效果。方法回顾性选取2020年2月—2022年2月万年县人民医院急性脑卒中患者80例,依据应用方法分为针刺联合血栓通与银杏叶提取物注射液治疗组(联合用药组)、常规用药组2组,各40例。分析2组神经功能缺损程度、独立生活能力、日常生活能力、临床疗效。结果联合用药组患者的美国国立卫生研究院卒中量表(NIHSS)评分、改良Rankin量表(mRS)评分均低于常规用药组(P<0.05)。联合用药组患者的改良Barthel指数(MBI)评分高于常规用药组(P<0.05)。联合用药组患者的总有效率92.50%(37/40)高于常规用药组的67.50%(27/40)(P<0.05)。结论急性脑卒中患者采用针刺联合血栓通与银杏叶提取物注射液治疗的效果较常规用药治疗效果显著。

关键词：急性脑卒中针刺疗法血栓通银杏叶提取物注射液

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