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Optimal reactions for the synthesis of superheavy nucleus ^(270)Hs

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Science china(Physics,Mechanics & Astronomy) 2006年第6期49卷 641-648页

作者： liu zuhua1,3 & bao jingdong1,2 1. key laboratory of beam technology and material modification of ministry of education, beijing normal university, beijing 100875, china 2. Physics Department, beijing normal university, beijing 100875, china 3. china Institute of Atomic Energy, beijing 102413, china key laboratory of beam technology and material modification of ministry of education Beijing Normal University Beijing China china Institute of Atomic Energy Beijing China Physics Department Beijing Normal University Beijing China

The superheavy nucleus 270Hs is expected to be a “double-magic” deformed nucleus. We have calculated its cross sections of evaporation residue for the reactions 248Cm(26Mg,4n)270Hs, 244Pu(30Si,4n)270Hs, 238U(36S,4n)270Hs and 226Ra(48Ca,4n)270Hs using a two-parameter Smoluchowski equation. It is found from our results that 226Ra(48Ca,4n)270Hs and 238U(36S,4n)270Hs are two optimal reactions for the synthesis of the superheavy nucleus 270Hs due to their large negative Q-values.

关键词： diffused fusion barrier,Smoluchowski equation,superheavy nuclei.

First-principles calculations on implanted TiO_2 by 3d transition metal ions

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Science china(Physics,Mechanics & Astronomy) 2009年第6期52卷 838-842页

作者： HOU XingGang1,2, HUANG MeiDong1, WU XiaoLing2 & liu AnDong2 1 Department of Physics, Tianjin normal university, Tianjin 300387, china 2 key laboratory of beam technology and material modification of ministry of education, beijing normal university, beijing 100875, china Department of Physics Tianjin Normal University Tianjin China key laboratory of beam technology and material modification of ministry of education Beijing Normal University Beijing China

3d transition metal (V, Cr and Fe) ions are implanted into TiO2 by the method of metal ion implantation. The electronic band structures of TiO2 films doped 3d transition metal ions have been analyzed by ab initio band calculations based on a self-consistent full-potential linearized augmented plane-wave method within the first-principle formalism. Influence of implantation on TiO2 films is examined by the method of UV-visible spectrometry. The results of experiment and calculation show that the optical band gap of TiO2 films is narrowed by ion implantation. The calculation shows that the 3d state of V, Cr and Fe ions plays a significant role in red shift of UV-Vis absorbance spectrum.

关键词： 3d transition metal ions implantation TiO2 FP-LAPW electronic structure

Exotic structure of the third excited state in^(21)Na

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Chinese Science Bulletin 2005年第23期50卷 2677-2680页

作者： LI Xihan1,2,3, LIANG Yujie1,2,3, DENG Fuguo1,2,3, liu zuhua1,4 & ZHOU Hongyu1,2,3 1. key laboratory of beam technology and material modification of Minister of education, beijing normal university, beijing 100875, china 2. Institute of Low Energy Nuclear Physics, and Department of material Science and Engineering, beijing normal university, beijing 100875, china 3. beijing Radiation Center, beijing 100875, china 4. china Institute of Atomic Energy, beijing 102413, china key laboratory of beam technology and material modification of Minister of education Beijing Normal University Beijing 100875 China Institute of Low Energy Nuclear Physics Department of Material Science and Engineering Beijing Normal University Beijing 100875 China beijing Radiation Center Beijing 100875 China china Institute of Atomic Energy Beijing 102413 China

The probability of the last proton being out of the binding potential, P and the root-mean-square (rms) ra- dius (1/2= of the third excited state in 21Na are calcu- lated by means of asymptotic normalization coefficient (ANC) method with the experimental date existing. The results are P=54.73% and 1/2=5.28 fm respectively. The P value and the contribution of the asymptotic part to the 1/2 are compared with those of several other low energy states in 21Na. It is found that the valence particle in the third excited state has an obvious larger P than those of other states. The density distribution of the valence proton in this state is also compared with the nucleons in the nuclear core 20Ne, and a far extended tail can be seen clearly. These results show that the third ex- cited state in 21Na is a proton halo state.

关键词：钠第三激发态外部结构有效半径密度分布渐近标准化系数

Shell effect and capture cross sections in the synthesis of superheavy nuclei

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Science china(Physics,Mechanics & Astronomy) 2009年第10期52卷 1489-1493页

作者： DU SaiSai1,2,BIAN baoAn1,2,3,liu Min1,2,4,FENG ZhaoQing5,6 & ZHANG FengShou1,2,6 1 key laboratory of beam technology and material modification of ministry of education,College of Nuclear Science and technology,beijing normal university,beijing 100875,china 2 beijing Radiation Center,beijing 100875,china 3 School of Science,Jiangnan university,Wuxi 214122,china 4 College of Physics and technology,Guangxi normal university,Guilin 541004,china 5 Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,china 6 Center of Theoretical Nuclear Physics,National laboratory of Heavy Ion Accelerator of Lanzhou,Lanzhou 730000,china key laboratory of beam technology and material modification of ministry of education College of Nuclear Science and Technology Beijing Normal University Beijing China beijing Radiation Center Beijing China School of Science Jiangnan University Wuxi China College of Physics and technology Guangxi Normal University Guilin China Institute of Modern Physics Chinese Academy of Sciences Lanzhou China Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator of Lanzhou Lanzhou China

The shell effect is included in the improved isospin dependent quantum molecular dynamics model in which the shell correction energy of the system is calculated by using the deformed two-center shell model. A switch function is introduced to connect the shell correction energy of the projectile and the target with that of the compound nucleus during the dynamical fusion process. It is found that the calculated capture cross sections reproduce the experimental data quantitatively at the energy near the Coulomb barrier. The capture cross sections for reaction 35 80 Br + 82 208 Pb → 117 288 X are also calculated and discussed.

关键词： superheavy nuclei transport theory shell effect cross sections

Trace doping realizing superior electrochemical performance in P2-type Na_(0.50)Li_(0.08)Mn_(0.60)Co_(0.16)Ni_(0.16)0_(2)cathode for sodium-ion batteries

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Chinese Chemical Letters 2023年第12期34卷 387-391页

作者： Hongying Hou Jinxu Qiu bao Li Liang Wang Zhuangzhuang Zhang Mengmin Jia Xiaobing Lai Mingming Han Pengyao Yan Dai-Huo liu Dongmei Dai bao Wang Faculty of material Science and Engineering Kunming University of Science and TechnologyKunming 650093 China Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals Key Laboratory of Green Chemical Media and ReactionsMinistry of EducationSchool of Chemistry and Chemical EngineeringHenan Normal UniversityXinxiang 453007China State key laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China

P2-type layered oxides are receiving significant interest due to their superior structure and intrinsic *** are strenuous attempts to balance the structure stability,phase transition as well as desirable electrochemical performances by inducing anion/cation ions,changing morphology,adjusting valence,*** this work,several same-period elements of Sc,Ti,V,Cr,Fe,Cu and Zn are doped into Na_(0.50)Li_(0.08)Mn_(0.60)Co_(0.16)Ni_(0.16)O_(2)cathodes,which are manipulated by ions radii and valence state,further studied by operando X-ray powder diffraction patterns(XRD).As a result,the Cu^(2+)doped cathode performed higher rate capacities(as high as 86 mAh/g even at 10 C)and more stable structures(capacity retention of~89.4%for 100 cycles),which owing to the synergistic effect among the tightened TMO_(2)layer,enlarged d-spacing,reduce O-O electrostatic repulsion,ameliorate lattice distortion as well as mitigate ordering of Na^(+)/vacancy.

关键词： P2-type layeredoxide Same-period elements doping Rietveld refinement Operando XRD Sodium-ion battery

CEPC Technical Design Report

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Radiation Detection technology and Methods 2024年第1期8卷 I0003-I0016,1-1091页

作者： Waleed Abdallah Tiago Carlos Adorno de Freitas Konstantin Afanaciev Shakeel Ahmad Ijaz Ahmed Xiaocong Ai Abid Aleem Wolfgang Altmannshofer Fabio Alves Weiming An Rui An Daniele Paolo Anderle Stefan Antusch Yasuo Arai Andrej Arbuzov Abdesslam Arhrib Mustafa Ashry Sha Bai Yu Bai Yang Bai Vipul Bairathi Csaba Balazs Philip Bambade Yong Ban Tripamo Bandyopadhyay Shou-Shan bao Desmond P.Barber Ayse Bat Varvara Batozskaya Subash Chandra Behera Alexander Belyaev Michele Bertucci Xiao-Jun Bi Yuanjie Bi Tianjian Bian Fabrizio Bianchi Thomas Biekotter Michela Biglietti Shalva Bilanishvili Deng Binglin Denis Bodrov Anton Bogomyagkov Serge Bondarenko Stewart Boogert Maarten Boonekamp Marcello Borri Angelo Bosotti Vincent Boudry Mohammed Boukidi Igor Boyko Ivanka Bozovic Giuseppe Bozzi Jean-Claude Brient Anastasiia Budzinskaya Masroor Bukhari Vladimir Bytev Giacomo Cacciapaglia Hua Cai Wenyong Cai Wujun Cai Yijian Cai Yizhou Cai Yuchen Cai Haiying Cai Huacheng Cai Lorenzo Calibbi Junsong Cang Guofu Cao Jianshe Cao Antoine Chance Xuejun Chang Yue Chang Zhe Chang Xinyuan Chang Wei Chao Auttakit Chatrabhuti Yimin Che Yuzhi Che Bin Chen Danping Chen Fuqing Chen Fusan Chen Gang Chen Guoming Chen Hua-Xing Chen Huirun Chen Jinhui Chen Ji-Yuan Chen Kai Chen Mali Chen Mingjun Chen Mingshui Chen Ning Chen Shanhong Chen Shanzhen Chen Shao-Long Chen Shaomin Chen Shiqiang Chen Tianlu Chen Wei Chen Xiang Chen Xiaoyu Chen Xin Chen Xun Chen Xurong Chen Ye Chen Ying Chen Yukai Chen Zelin Chen Zilin Chen Gang Chen Boping Chen Chunhui Chen Hok Chuen Cheng Huajie Cheng Shan Cheng Tongguang Cheng Yunlong Chi Pietro Chimenti Wen Han Chiu Guk Cho Ming-Chung Chu Xiaotong Chu Ziliang Chu Guglielmo Coloretti Andreas Crivellin Hanhua Cui Xiaohao Cui Zhaoyuan Cui Brunella D'Anzi Ling-Yun Dai Xinchen Dai Xuwen Dai Antonio De Maria Nicola De Filippis Christophe De La Taille Francesca De Mori Chiara De Sio Elisa Del Core Shuangxue Deng Wei-Tian Deng Zhi Deng Ziyan Deng Bhupal Dev Tang Dewen Biagio Di Micco Ran Ding Siqin Dingl Yadong Ding Haiyi Dong Jianin AGH university of Science and technology Faculty of Physics and Applied Computer ScienceKrakow Anhui university HefeiAnhui Applied Physics Department Federal Urdu University of ArtsScience and TechnologyIslamabad Banaras Hindu university Institute of ScienceVaranasi Bandirma Onyedi Eylul university Bandirma Beihang university Beijing beijing Computational Science Research Center Beijing beijing Conveyi LTD Beijing beijing Glass Research Institute Co. LtdBeijing beijing Institute of technology Beijing beijing normal university Beijing Brown university ProvidenceRI Budker Institute of Nuclear Physics Novosibirsk Cadi Ayyad university Laboratory of Fundamental and Applied PhysicsPolydisciplinary FacultyMarrakech Cairo university Giza Center for Theory and Computation National Tsing Hua UniversityHsinchu Central china normal university WuhanHubei Central South university ChangshaHunan Centro de Fisica Teorica de Particulas Universidade Tecnica de LisboaLisboa Chengdu KaitengSifang Digital Radio&TV Equipment Co. LtdChengduSichuan china academy of engineering physics MianyangSichuan china building materials academy Beijing china Center of Advanced Science and technology Beijing china Institute of Atomic Energy Beijing china Jiliang university HangzhouZhejiang china Nuclear Instrument CO. LTDBeijing china university of Geosciences Beijing china university of Geosciences WuhanHubei china university of Mining and technology XuzhouJiangsu china West normal university NanchongSichuan Chongqing university Department of PhysicsChongqing Chulalongkorn university Bangkok City university of Hong Kong Department of PhysicsHong Kong Cockcroft Institute Daresbury Cornell university IthacaNY CPPM(AMU/IPhU&CNRS/INP) Marseille Dalian Minzu university DalianLiaoning Dalian university of technology Department of PhysicsDalian Deutsches Elektronen-Synchrotron DESY Hamburg Dzhelepov laboratory of Nuclear Problems of Joint Institute for Nuclear Research(DLNP JINR) Dubna East china university Of Science And Technol

The Circular Electron Positron Collider(CEPC)is a large scientific project initiated and hosted by china,fostered through extensive collaboration with international *** complex comprises four accelerators:a 30 GeV Linac,a 1.1 GeV Damping Ring,a Booster capable of achieving energies up to 180 GeV,and a Collider operating at varying energy modes(Z,W,H,and tt).The Linac and Damping Ring are situated on the surface,while the subterranean Booster and Collider are housed in a 100 km circumference underground tunnel,strategically accommodating future expansion with provisions for a potential Super Proton Proton Collider(SPPC).The CEPC primarily serves as a Higgs *** its baseline design with synchrotron radiation(SR)power of 30 MW per beam,it can achieve a luminosity of 5×10^(34)cm^(-2)s^(-1)per interaction point(IP),resulting in an integrated luminosity of 13 ab^(-1)for two IPs over a decade,producing 2.6 million Higgs *** the SR power to 50 MW per beam expands the CEPC's capability to generate 4.3 million Higgs bosons,facilitating precise measurements of Higgs coupling at sub-percent levels,exceeding the precision expected from the HL-LHC by an order of *** Technical Design Report(TDR)follows the Preliminary Conceptual Design Report(Pre-CDR,2015)and the Conceptual Design Report(CDR,2018),comprehensively detailing the machine's layout,performance metrics,physical design and analysis,technical systems design,R&D and prototyping efforts,and associated civil engineering ***,it includes a cost estimate and a preliminary construction timeline,establishing a framework for forthcoming engineering design phase and site selection *** is anticipated to begin around 2027-2028,pending government approval,with an estimated duration of 8 *** commencement of experiments and data collection could potentially be initiated in the mid-2030s.

关键词： initiated exceeding precise

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NC–UHPC组合梁抗冲击性能的数值研究

工程科学学报 2024年第2期46卷 354-364页

作者：伍敏黄于倩潘仁胜金浏杜修力长沙理工大学桥梁工程安全控制教育部重点实验室长沙410114 北京工业大学城市减灾与防灾防护教育部重点实验室北京100124

超高性能混凝土(UHPC)材料已成为极具前景的高性能材料,并在冲击和爆炸等防护工程领域中取得了良好的效果.对于普通钢筋混凝土(NC)梁在受到冲击荷载时较易发生局部冲剪破坏,而纯UHPC梁虽可改善其冲击性能,但高昂的造价限制了其进一步的... 详细信息

超高性能混凝土(UHPC)材料已成为极具前景的高性能材料,并在冲击和爆炸等防护工程领域中取得了良好的效果.对于普通钢筋混凝土(NC)梁在受到冲击荷载时较易发生局部冲剪破坏,而纯UHPC梁虽可改善其冲击性能,但高昂的造价限制了其进一步的应用.为了实现结构抗冲击性能和经济的平衡,提出UHPC局部替换和包裹的方案改善钢筋混凝土梁的抗冲击性能.本文设计了NC梁、UHPC梁和NC–UHPC组合梁等不同的研究工况,然后对比分析各个试件的抗冲击性能.结果表明:相比普通钢筋混凝土梁,UHPC局部替换方案可以有效的避免梁的局部冲剪破坏,而UHPC包裹在冲击荷载下梁的破坏模式由冲剪破坏转变为弯曲破坏,两种方案均可有效的减少梁跨中的峰值位移和残余位移;UHPC局部替换相较于包裹方案,梁的跨中峰值位移和残余位移较小,且具有更高的跨中承载能力,在实际过程中建议UHPC局部替换长度取大于2倍梁高以避免局部冲剪破坏.

关键词：超高性能混凝土普通钢筋混凝土组合梁冲击荷载冲剪破坏弯曲破坏

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真空烧结泡沫304不锈钢吸声性能

中国有色金属学报 2017年第12期27卷 2560-2566页

作者：刘培生徐新邦孙进兴崔光北京师范大学核科学与技术学院射线束技术教育部重点实验室北京100875 北京市辐射中心北京100875

利用挂浆工艺,在1050℃下真空烧结3 h,成功制备三维网状的泡沫304不锈钢,制品烧结良好。样品平均孔径约1.8 mm,孔隙率约93.7%。测试该泡沫金属在200~6300 Hz及其加入背腔后在2500~4000 Hz时的吸声系数,探讨背腔对样品吸声性能的影响。... 详细信息

利用挂浆工艺,在1050℃下真空烧结3 h,成功制备三维网状的泡沫304不锈钢,制品烧结良好。样品平均孔径约1.8 mm,孔隙率约93.7%。测试该泡沫金属在200~6300 Hz及其加入背腔后在2500~4000 Hz时的吸声系数,探讨背腔对样品吸声性能的影响。结果表明:本制品在测试范围的中高频段表现出较好的吸声效果,其第一共振频率为4000 Hz,此时最大吸声系数约0.7;在1250~3150 Hz之间,增加样品厚度可明显提高吸声效果;加入背腔可大幅度提高样品的整体吸声效果。

关键词：多孔材料泡沫金属泡沫不锈钢吸声性能

基于7Li(p,γ)8Be共振核反应伽马源的光核嬗变实验原理验证研究

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原子能科学技术 2024年第4期58卷 714-720页

作者：叶杉刘伏龙薄楠王浩然程浩李弘伟吴笛杨婉莎魏继红马田丽樊启文王志强刘毅娜宋明哲刘蕴韬贺创业郭冰中国原子能科学研究院北京102413 北京师范大学核科学与技术学院北京100875 北京师范大学射线束技术教育部重点实验室北京100875

光核嬗变可作为长寿命核废料嬗变的一种补充手段.随着强流质子加速器技术的发展,共振核反应γ源的流强可达到较高强度.7Li(p,γ)8Be共振核反应产生的148MeV与176MeV伽马射线恰好位于巨共振区内,是研究光核嬗变的较好选择.本工作基于中... 详细信息

光核嬗变可作为长寿命核废料嬗变的一种补充手段.随着强流质子加速器技术的发展,共振核反应γ源的流强可达到较高强度.7Li(p,γ)8Be共振核反应产生的148MeV与176MeV伽马射线恰好位于巨共振区内,是研究光核嬗变的较好选择.本工作基于中国原子能科学研究院2×17MV串列加速器,利用7Li(p,γ)8Be共振核反应产生的高能伽马射线对197Au进行了光核嬗变实验研究.在质子流强081μA的条件下,当金靶厚度为2mm时,反推得到4π方向上的总嬗变率为(58683±2298)s-1.该实验结果为将来利用共振核反应伽马源进行光核嬗变实验研究奠定了技术基础.

关键词：光核嬗变高能伽马射线共振核反应核废料