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β-decay of light neutron-rich nuclei

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β-decay of light neutron-rich nuclei

第十三届全国核结构研讨会暨第九次全国“核结构与量子力学”专题讨论会

作者： he chao hua {3. school of physics and state key laboratory of nuclear physics and Technology,peking university,beijing 100871,{13.

Theβ-decay of neutron-rich C and N isotopes have been studied using the OXBASH shell model. With the WBP interaction,the calculated half-lives and neutron emission probabilities reproduce recent experimental data ver... 详细信息

关键词： β-decay Neutron-rich nuclei OXBASH

Structure and 2p decay mechanism of^(18)Mg

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nuclear Science and Techniques 2024年第6期35卷 145-154页

作者： Long Zhou De-Qing Fang Si-Min Wang hui hua key laboratory of nuclear {3. and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China Shanghai Research Center for Theoretical nuclear physics NSFC and Fudan UniversityShanghai 200438China school of physics and state {3. laboratory of nuclear physics and Technology Peking UniversityBeijing 100871China

The recently discovered,extremely proton-rich nuclide 18 Mg exhibits ground-state decay via two sequential two-proton(2p)emissions through the intermediate nucleus,*** study investigates the structure and the initial 2p decay mechanism of^(18)Mgby examining the density and correlations of the valence protons using a three-body Gamow coupled-channel *** results show that the ground state of^(18)Mgis significantly influenced by the continuum,resulting in a significant s-wave ***,based on the current framework,this does not lead to a significant deviation in mirror symmetry in either the structure or spectroscopy of the 18Mg-18C ***,the time evolution analysis of the^(18)Mgground state suggests a simultaneous 2p emission during the first step of *** observed nucleon-nucleon correlations align with those of the light-mass 2p emitters,indicating a consistent decay behavior within this nuclear region.

关键词： Structure of^(18)Mg Two-proton decay Proton-proton correlation

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Beta-Counting System

Beta-Counting System

第十三届全国核结构研讨会暨第九次全国“核结构与量子力学”专题讨论会

作者： Li XiangQing~(1)),Jiang DongXing,hua hui~(2)),Wang EnHong school of {3. and state key laboratory of nuclear {3. and Technology,peking university beijing 100871,china

A new beta counting system has been developed to study the beta decay of exotic nuclei produced by fission and *** system employs the Micron Semiconductor Ltd.[1]Model W 1(DS)-1500 DC coupled double-sided silicon strip detector(DSSSD) with 16 front strips and 16 back strips,each of width 3.m,to detect both fragment implants and their subsequent beta *** of the challenges in designing electronics for the beta counting system is the range of charged particle energies that must be measured.A fast particle will deposit more than 1GeV total energy in the DSSSD,while an emitted beta particle will deposit less than *** can be seen in figure,implantation and decay events are dircetly correlated within each pixel of the detector,providing a measurement of the beta-decay time in the seconds *** with mesytc[2]and Multi Channel System[3. electronics will be described and experimental results of a 241Amα-source is discussed.

关键词： beta-decay Silicon detectors

New observed structure phenomena in 157Yb

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New observed structure phenomena in 157Yb

第十四届全国核物理大会暨第十届会员代表大会

作者： XU Chuan1,hua hui1,LI Xiangqing1,ZHANG Shuangquan1,XU Furong1,SHI Yue1,ZHU Lihua2,WU Xiaoguang2,LI Guangsheng2,he Chuangye2 1school of physics and state key laboratory of {13. physics and Technology, peking university, beijing 100871, china 2china Institute of Atomic Energy, beijing 102413. china

High-spin states in 157Yb have been populated in the 144Sm(16O,3.) 157Yb fusion-evaporation reaction at beam energy 85MeV and two rotational bands have been established for the first *** the framework o

关键词： 157Yb shape coexistence shape evolution triaxial particle-rotor model Total-Routhian-Surface

Knockout reaction mechanism studied by ~6he projectile

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Science china(physics,Mechanics & Astronomy) 2011年第S1期54卷 136-140页

作者： Lü Linhui1, YE YanLin1, JIANG DongXing1, hua hui1, Z{3.NG Tao1, LI Zhihuan1, GE YuC{3.ng1, LI XiangQing1, LOU JianLing1, CAO ZhongXin1, SONG YuShou1, XIAO Jun1, LI QiTe1, QIAO Rui1, YOU HaiBo1, C{3.N RuiJiu1, XU HuShan2, WANG JianSong2, GUO ZhongYan2, ZHANG XueYing2, LI C{3.n2, HU Z{3.ngGuo2, C{3.N RuoFu2, WANG Meng2, XU ZhiGuo2, YUE Ke2, TANG Bin2, ZANG YongDong2, ZHANG Xue{3.ng2, YAO XiangWu2, C{3.N JinDa2 & BAI Z{3.n2 1 {13. of physics and state key laboratory of nuclear physics and Technology, peking university, beijing 100871, china 2 Institute of Modern physics, Chinese Academy of Sciences, Lanzhou 73.000, china school of physics and state {3. laboratory of nuclear physics and Technology Peking University Beijing China Institute of Modern physics Chinese Academy of Sciences Lanzhou China

Knockout reaction experiment was carried out by using the 6he beams at 61.2 MeV/u impinging on a CH2 target. The α core fragments at forward angles were detected in coincidence with the recoiled protons at larger angles. From this exclusive meas urement the valence nucleon knockout mechanism and the core knockout mechanism can be distinguished by the relation be tween the polar angles of the core fragments and the recoiled protons, respectively. It is demonstrated that the core knockout mechanism may result in some strong contamination to the real invariant mass spectrum.

关键词： exotic nuclei knockout reaction reaction mechanism invariant mass spectra

Nondestructive technique for identifying nuclides using neutron resonance transmission analysis at CSNS Back-n

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nuclear Science and Techniques 2024年第1期35卷 178-187页

作者： Sheng-Da Tang Yong-Hao Chen Jing-Yu Tang Rui-Rui Fan Qiang Li Gong Li Dong Liu Zheng-Yao Jin Xing-Zhu Cui Tian-Xiang Chen Yi-Wei Yang Rong Liu Han Yi Yang Li Zhen Yang Qi An Hao-Fan Bai Jiang-Bo Bai Jie Bao Ping Cao Qi-Ping Chen Zhen Chen Zeng-Qi Cui An-Chuan Fan Chang-Qing Feng Fan-Zhen Feng Ke-Qing Gao Min-Hao Gu Chang-Cai Han Zi-Jie Han Guo-Zhu he Yong-Cheng he Yang Hong Yi-Wei Hu Han-Xiong huang Wei-hua Jia Hao-yu Jiang Wei Jiang Zhi-jie Jiang Ling Kang Bo Li chao Li Jia-Wen Li Xiao Li Jie Liu Shu-Bin Liu Guang-Yuan Luan Chang-Jun Ning Bin-Bin Qi Jie Ren Zhi-Zhou Ren Xi-chao Ruan Zhao-hui Song Kang Sun Zhi-Xin Tan Li-Jiao Wang Peng-Cheng Wang Zhao-hui Wang Zhong-Wei Wen Xiao-Guang Wu Xuan Wu Li-Kun Xie Yong-Ji Yu Guo-hui Zhang Lin-Hao Zhang Mo-Han Zhang Qi-Wei Zhang Xian-Peng Zhang Yu-Liang Zhang Yue Zhang Zhi-Yong Zhang Mao-Yuan Zhao Lu-Ping Zhou Zhi-Hao Zhou Ke-Jun Zhu Sino-French Institute of nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China Institute of High-Energy physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China school of nuclear Science and Technology University of Science and Technology of ChinaHefei 230026China state key laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China state key laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China USTC Archaeometry laboratory University of Science and Technology of ChinaHefei 230026China Institute of nuclear physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China Department of Modern physics University of Science and Technology of ChinaHefei 230026China state key laboratory of {3. physics and Technology School of PhysicsPeking UniversityBeijing 100871China key laboratory of nuclear Data China Institute of Atomic EnergyBeijing 102413China Northwest Institute of nuclear Technology Xi’an 710024China university of Chinese Academy of Sciences Beijing 100049China

Nondestructive and noninvasive neutron assays are essential applications of neutron *** resonance transmission analysis(NRTA)is a powerful nondestructive method for investigating the elemental composition of an *** back-streaming neutron line(Back-n)is a newly built time-of-flight facility at the china Spallation Neutron Source(CSNS)that provides neutrons in the eV to 3.0 MeV range.A feasibility study of the NRTA method for nuclide identification was conducted at the CSNS Back-n via two test *** results demonstrate that it is feasible to identify different elements and isotopes in samples using the NRTA method at *** study reveals its potential future applications.

关键词： CSNS White neutron beam NRTA Nuclide identification Nondestructive method

Study of the response of 10B-doped MCP to wide-energy range neutrons from eV to MeV

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nuclear Science and Techniques 2024年第8期35卷 132-141页

作者： Qiang Li Li‑Jiao Wang Xiang‑Biao Qiu Jing‑Wen Li Wei Xu Tao Li Ze‑Bin Lin Chang‑Jun Ning Yong‑Hao Chen Rui‑Rui Fan Kang Sun Jing‑Yu Tang Rong Zhang Han‑Tao Jing Bo Mei Qi An Hao‑Fan Bai Jiang‑Bo Bai Jie Bao Ping Cao Qi‑Ping Chen Zhen Chen Zeng‑Qi Cui An‑Chuan Fan Chang‑Qing Feng Fan‑Zhen Feng Ke‑Qing Gao Min‑Hao Gu Chang‑Cai Han Zi‑Jie Han Guo‑Zhu he Yong‑Cheng he Yang Hong Yi‑Wei Hu Han‑Xiong huang Wei‑hua Jia Hao‑Yu Jiang Wei Jiang Zhi‑Jie Jiang Zheng‑Yao Jin Ling Kang Bo Li chao Li Gong Li Jia‑Wen Li Xiao Li Yang Li Jie Liu Rong Liu Shu‑Bin Liu Guang‑Yuan Luan Bin‑Bin Qi Jie Ren Zhi‑Zhou Ren Xi‑chao Ruan Zhao‑hui Song Zhi‑Xin Tan Sheng‑Da Tang Peng‑Cheng Wang Zhao‑hui Wang Zhong‑Wei Wen Xiao‑Guang Wu Xuan Wu Li‑Kun Xie Yi‑Wei Yang Han Yi Yong‑Ji Yu Guo‑hui Zhang Lin‑Hao Zhang Mo‑Han Zhang Qi‑Wei Zhang Xian‑Peng Zhang Yu‑Liang Zhang Yue Zhang Zhi‑Yong Zhang Mao‑Yuan Zhao Lu‑Ping Zhou Zhi‑Hao Zhou Ke‑Jun Zhu Institute of High Energy physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China state key laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Dongguan Songshan Lake Future school Dongguan 523808China North Night Vision Science&Technology(Nanjing)Research Institute Co.Ltd. Nanjing 211106China Sino‑French Institute of nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China school of nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China state key laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Modern physics University of Science and Technology of ChinaHefei 230026China state key laboratory of {3. physics and Technology School of PhysicsPeking UniversityBeijing 100871China Institute of nuclear physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China key laboratory of nuclear Data China Institute of Atomic EnergyBeijing 102413China USTC Archaeometry Lab University of Science and Technology of ChinaHefei 230026China Northwest Institute of nuclear Technology Xi’an 710024China university of Chinese Academy of Sciences Beijing 100049China

Neutron-sensitive microchannel plates(nMCPs)have applications in neutron detection,including energy spectrum measurements,neutron-induced cross sections,and neutron imaging.10B-doped MCPs(B-MCPs)have attracted significant attention owing to their potential for exhibiting a high neutron detection efficiency over a large neutron energy *** spatial and temporal resolutions are useful for neutron energy-resolved ***,their practical applications still face many technical *** this study,a B-MCP with 10 mol%10B was tested for its response to wide-energy neutrons from eV to MeV at the Back-n white neutron source at the china Spallation Neutron *** neutron detection efficiency was calibrated at 1 eV,which is approximately 3.0 times that of an ordinary MCP and indicates the success of 10 B *** factors that caused the reduction in the detection efficiency were simulated and *** neutron energy spectrum obtained using B-MCP was compared with that obtained by other measurement methods,and showed very good consistency for neutron energies below tens of *** response is more complicated at higher neutron energy,at which point the elastic and nonelastic reactions of all nuclides of B-MCP gradually become *** is beneficial for the detection of neutrons,as it compensates for the detection efficiency of B-MCP for high-energy neutrons.

关键词： Neutron radiation image 10B-doped MCP Neutron response Wide-energy range neutrons

Study exotic nuclear 6he by knockout reaction on proton target

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Study exotic nuclear 6He by knockout reaction on proton targ...

第十三届全国核结构研讨会暨第九次全国“核结构与量子力学”专题讨论会

作者： LV Lin-hui~(1 1)),YE Yan-Lin~(1 2)),JIANG Dong-Xing~1,hua hui~1, Z{3.NG tao~1,LI Zhi-huan~1,GE Yu-C{3.ng~1,LI Xiang-qing~1, LOU Jian-Ling~1,CAO Zhong-Xin~1,XIAO Jun~1,Li Qi-Te~1, 1(state key laboratory of nuclear physics and Technology,school of physics,{13.,beijing 100871,china)

The mechanism of knockout reaction by he beams with the energy of 62MeV/u and 82MeV/u impinging on proton target has been *** on the structure of he was obtained by quasi-free scattering processes and momentum distributions of cluster in *** order to get an accurate invariant mass spectrum of he,the mechanism of one neutron in he incident on proton has been selected.

关键词： Knockout reaction Reaction mechanism Exotic nuclei Invariant mass spectra

10B-doped MCP detector developed for neutron resonance imaging at Back-n white neutron source

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nuclear Science and Techniques 2024年第8期35卷 58-68页

作者： Qiang Li Li‑Jiao Wang Jing‑Yu Tang Xiang‑Biao Qiu Zhen Chen Mao‑Yuan Zhao Chang‑Jun Ning Kai Pan Wei Xu Tao Li Su‑Peng Lu Han Yi Rui‑Rui Fan Chang‑Qing Feng Rong Zhang Xiao‑Yang Sun Qi An Hao‑Fan Bai Jiang‑Bo Bai Jie Bao Ping Cao Qi‑Ping Chen Yong‑Hao Chen Zeng‑Qi Cui An‑Chuan Fan Fan‑Zhen Feng Min‑Hao Gu Chang‑Cai Han Zi‑Jie Han Guo‑Zhu he Yong‑Cheng he Yang Hong Yi‑Wei Hu Han‑Xiong huang Wei Jiang Zhi‑Jie Jiang Zheng‑Yao Jin Ling Kang Bo Li Gong Li Xiao Li Yang Li Jie Liu Rong Liu Shu‑Bin Liu Yi‑Na Liu Guang‑Yuan Luan Jie Ren Zhi‑Zhou Ren Xi‑chao Ruan Zhao‑hui Song Kang Sun Zhi‑Xin Tan Sheng‑Da Tang Jin‑Cheng Wang Peng‑Cheng Wang Zhao‑hui Wang Zhong‑Wei Wen Xiao‑Guang Wu Xuan Wu Cong Xia Yong‑Ji Yu Guo‑hui Zhang Hang‑Chang Zhang Lin‑Hao Zhang Qi‑Wei Zhang Xian‑Peng Zhang Yu‑Liang Zhang Yue Zhang Zhi‑Yong Zhang Zhi‑Hao Zhou Ke‑Jun Zhu Chong Zou Institute of High Energy physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China state key laboratory of Particle Detection and Electronics Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Dongguan Songshan Lake Future school Dongguan 523808China school of nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China state key laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China North Night Vision Science and Technology(Nanjing)Research Institute Co.Ltd Nanjing 211106China Department of Modern physics University of Science and Technology of ChinaHefei 230026China state key laboratory of {3. physics and Technology School of PhysicsPeking UniversityBeijing 100871China Institute of Modern physics Fudan UniversityShanghai 200433China key laboratory of nuclear Data China Institute of Atomic EnergyBeijing 102413China china Academy of Engineering physics Institute of Nuclear Physics and ChemistryMianyang 621900China USTC archaeometry lab University of Science and Technology of ChinaHefei 230026China Northwest Institute of nuclear Technology Xi’an 710024China university of Chinese Academy of Sciences Beijing 100049China china Shipbuilding Trading Co. LtdBeijing 100044China

Neutron resonance imaging(NRI)has recently emerged as an appealing technique for neutron *** complexity surpasses that of conventional transmission imaging,as it requires a high demand for both a neutron source and ***,the progression of NRI technology has been sluggish since its inception in the 1980s,particularly considering the limited studies analyzing the neutron energy range above *** white neutron source(Back-n)at the china Spallation Neutron Source(CSNS)provides favorable beam conditions for the development of the NRI technique over a wide neutron energy range from eV to ***-sensitive microchannel plates(MCP)have emerged as a cutting-edge tool in the field of neutron detection owing to their high temporal and spatial resolutions,high detection efficiency,and low *** this study,we report the development of a 10B-doped MCP detector,along with its associated electronics,data processing system,and NRI experiments at the *** heavy elements such as gold,silver,tungsten,and indium can be easily identified in the transmission images by their characteristic resonance peaks in the 1–100 eV energy range;the more difficult medium-weight elements such as iron,copper,and aluminum with resonance peaks in the 1–100 keV energy range can also be *** particular,results in the neutron energy range of dozens of keV(Aluminum)are reported here for the first time.

关键词： Neutron resonance imaging 10B doped MCP detector White neutron source Sample nuclide identification