检索结果-南通市图书馆

The effects of beam drifts on elastic scattering measured by the large solid-angle covered detector array

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2021年第2期32卷 24-31页

作者： Yong-Jin Yao Cheng-Jian Lin Lei Yang nan-ru ma Dong-Xi Wang Gao-Long Zhang Guang-Xin Zhang Hui-Ming Jia Feng Yang State Key Laboratory of Software Development Environment Beihang UniversityBeijing 100191China School of Physics Beihang UniversityBeijing 100191China China Institute of Atomic Energy Beijing 102413China

A new detector array characterized by compact structure and large solid-angle coverage was designed for radioactive ion beam(RIB)experiments and measuring multi-particle correlations.A Monte Carlo simulation was performed to explore the effects of beam drifts in different directions and distances on the angular distribution of the rutherford scattering,as measured by the detector *** results indicate that when the beam drift distance is less than 2.0 mm,the symmetry of the detector array can maintain a count error of less than 5%.This confirms the property of the detector array for RIB ***,the simulation was validated through the elastic scattering angular distributions of 6;7 Li measured by the detector array in 6;7Li t209 Bi experiments at different energies.

关键词： Large solid-angle detector array Beam drift Monte Carlo simulation Elastic scattering

Compact 16-channel integrated charge-sensitive preamplifier module for silicon strip detectors

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2020年第5期31卷 36-43页

作者： Dong-Xi Wang Cheng-Jian Lin Lei Yang nan-ru ma Li-Jie Sun Feng Yang Hui-Ming Jia Fu-Peng Zhong Pei-Wei Wen Department of Nuclear Physics China Institute of Atomic EnergyBeijing 102413China

In this study,a compact 16-channel integrated charge-sensitive preamplifier named the smart preamplifier(SPA)was developed to support the large-scale detector array used in modern nuclear physics *** types of SPA,namely SPA02 and SPA03(with external field effect transistor),have been manufactured to match silicon detectors with small and large capacitances,*** characteristics of the SPA include fast response of typically less than 6 ns for pulse rising time and low equivalent noise of 1.5 keV at zero input *** energy sensitivity and pulse decay time can be easily adjusted by changing the feedback capacitance Cfand resistance Rfin various applications.A good energy resolution of 24.4 keV for 5.803-MeV alpha particles from 244 Cm was achieved using a small-sized Si-PIN detector;for the silicon strip detectors in the test with the alpha source,a typical energy resolution of 0.6–0.8%was *** integrated SPA has been employed in several experiments of silicon strip detectors with hundreds of channels,and a good performance has been realized.

关键词： Silicon strip detector array 16-Channel integrated charge-sensitive preamplifier Preamplifier circuit design Preamplifier performance

First proof-of-principle experiment with the post-accelerated isotope separator on-line beam at BRIF:measurement of the angular distribution of ^(23)Na+^(40)Ca elastic scattering

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2021年第5期32卷 101-106页

作者： Wei nan Bing Guo Cheng-Jian Lin Lei Yang Dong-Xi Wang Yang-Ping Shen Bing Tang Bao-Qun Cui Tao Ge Yin-Long Lyu Hui-Ming Jia Yun-Ju Li Chen Chen Li-Hua Chen Qi-Wen Fan Xin-Yue Li Gang Lian Jian-Cheng Liu Tian-Peng Luo nan-ru ma rui-Gang ma Xie ma Ying-Jun ma Wei-Ke nan Dan-Yang Pang You-Bao Wang Pei-Wei Wen Feng Yang Yong-Jin Yao Sheng Zeng Hao Zhang Fu-Peng Zhong Shan-Hao Zhong Zhi-Hong Li Tian-Jue Zhang Wei-Ping Liu BRIF Collaboration China Institute of Atomic Energy(CIAE) P.O.Box 275(10)Beijing 102413China Department of Physics Guangxi Normal UniversityGuilin 541004China College of Nuclear Science and Technology Beijing Normal UniversityBeijing 100875China School of Physics Beihang UniversityBeijing 100191China Key Laboratory of Advanced Nuclear materials and Physics Beihang UniversityBeijing 100191China

The reaction dynamics of exotic nuclei near the drip line is one of the main research topics of current *** scattering is a useful probe for investigating the size and surface diffuseness of exotic *** development of rare isotope accelerators offers opportunities for such *** date,many relevant measurements have been performed at accelerators using the projectile fragmentation technique,while the measurements at accelerators using isotope separator on-line(ISOL)systems are still quite *** this work,we present the first proof-of-principle experiment with a post-accelerated ISOL beam at the Beijing Radioactive Ion Beam Facility(BRIF)by measuring the angular distribution of elastic scattering for the stable nucleus^(23)Na from the doubly magic nucleus^(40)Ca at energies above the Coulomb *** angular distribution measured by a silicon strip detector array in a scattering chamber using the ISOL beam at BRIF is in good agreement with that measured by the high-precision Q3 D magnetic spectrograph using the nonISOL beam at nearly the same *** work provides useful background for making BRIF a powerful tool for the investigation of the reaction dynamics of exotic nuclei.

关键词： BRIF Exotic nuclei Elastic scattering Angular distribution

Silicon detector array for radioactive beam experiments at HIRFL-RIBLL

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2018年第11期29卷 271-278页

作者： Fang-Fang Duan Yan-Yun Yang Bi-Tao Hu Jian-Song Wang Zhi-Hao Gao Xing-Quan Liu Dipikap Patel Peng ma Jun-Bing ma Shu-Ya Jin Zhen Bai Qiang Hu Guo Yang Xin-Xin Sun nan-ru ma Li-Jie Sun Hui-Ming Jia Xin-Xing Xu Cheng-Jian Lin School of Nuclear Science and Technology Lanzhou University Institute of Modern Physics Chinese Academy of Sciences Department of Nuclear Physics China Institute of Atomic Energy School of Physics and Astronomy Shanghai Jiao Tong University Department of Physics The University of Hong Kong

A new and innovative detector system based on a silicon strip detector dedicated to the study of the reaction induced by lighter radioactive beams is described *** detector system consists of five sets of three types of telescopes,which are successfully used to measure the angular distributions of both elastic scattering and breakup simultaneously, on the Radioactive Ion Beam Line in Lanzhou at Heavy Ion Research Facility in Lanzhou. This silicon detector array is used to measure the elastic scattering angular distributions of ^(11) Be on a ^(208) Pb target at E_(lab) = 140 and 209 MeV. A comparison of the Monte Carlo simulations with the experimental results shows a reasonable consistency.

关键词： Direct nuclear reactions Silicon detector array Radioactive ion beams Monte Carlo simulation

Bayesian analysis on non-resonant behavior of 12C+12C fusion reaction at sub-barrier energies

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2022年第6期46卷 174-182页

作者： Tian-Peng Luo Pei-Wei Wen Cheng-Jian Lin Lei Yang Hui-Ming Jia Feng Yang Da-Hu Huang Chang Chang Ming-Hao Zhang Yun Yang Teng-Huan Mo nan-ru ma China Institute of Atomic Energy Beijing 102413China College of Physics and Technology&Guangxi Key Laboratory of Nuclear Physics and Technology Guangxi Normal UniversityGuilin 541004China

Controversies exist among experiments and theories on the S^(*)factor of the astrophysical important reaction ^(12)C+^(12)C for energies below 3 *** frequentist approaches have been used so far for data analysis,and the confidence levels or theoretical errors are not available from previous theoretical *** this study,the Bayesian method is employed to provide theoretical predictions and its 1σconfidence level based on all the currently available experimental data for the first *** improved coupled-channels model CCFULL-FEM implemented with the finite element method as well as the markov chain Monte Carlo approach emcee are adopted to analyze the non-resonant behavior of this *** posterior distribution of the Woods-Saxon potential parameters is *** with the widely used frequentist method MIGRAD within the Minuit minimization program,the Bayesian method has a significant advantage for exploring the potential parameter *** the existing experimental data measured down to subbarrier energies are considered,the potential parameters are constrained to a very narrow range,and the predictions of the S^(*) factor showed no sharp decrease in the low-energy region.

关键词： Bayesian method coupled channels method carbon fusion reaction astrophysical S-factor

Laser test of the prototype of CEE time projection chamber

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2018年第3期29卷 138-142页

作者： Wen Huang Fei Lu He Li He Dong Yong-jin Ye Chen-Sheng Zhou Long-Xiang Liu Long Du Xiao-Hai Jin Peng-Liu Jin-Hui Chen Song Zhang Chen Zhong Chen Wu Qi-Te Li Hong-Liang Zang Yu-Cheng Ge Cheng-Jian Lin Hui-Ming Jia nan-ru ma Dong-Xi Wang Peng ma Jun Xu De-Qing Fang Yu-Gang ma Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China China Institute of Atomic Energy P.O.Box 275(10)Beijing 102413China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China

A prototype thick-GEM-based cooling storage ring external-target experiment(CEE) time projection chamber(TPC) is constructed and tested with the pulsed ultraviolet laser beams. The results indicate that the prototype TPC has a good performance in three-dimensional track resolution. In X direction the position resolution is about 0.2 mm, and in Y direction the position resolution is about 0.5 mm. The results also determine that the energy resolution is about 5.4%, which achieve the requirements of the CEE experiment and can be used to study the nuclear state equation and the quantum chromo dynamics.

关键词： TPC Thick GEM Laser test Track resolution Energy resolution

Relative probabilities of breakup channels in reactions of^(6.7)Li with^(209)Biat energies around and above the Coulomb barrier

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2021年第5期45卷 141-148页

作者： Yong-Jin Yao Cheng-Jian Lin Lei Yang nan-ru ma Dong-Xi Wang Gao-long Zhang Guang-Xin Zhang Hui-Ming Jia Feng Yang Fu-Peng Zhong Pei-Wei Wen Xiu-Bo Qin Hong-Ming Zhao State Key Laboratory of Software Development Environment Beihang UniversityBeijing 100191China School of Physics Beihang UniversityBejing 100191China China Institute of Atomic Energy Beijing 102413China Guangxi Normal University Guangxi 541004China X Lab the Second Academy of CASICBejjing 100854China

Coincidence measurements of breakup fragments in reactions of^(6.7)with^(209)Bi at energies around and above the Coulomb barrier were carried out using a large solid-angle covered detector *** the Q values along with the relative energies of the breakup fragments,different breakup components(prompt breakups and delayed breakups)and different breakup modes(α+t,α+d,α+p,andα+α)are distinguished.A new breakup mode,α+t,is observed in^(6)Li-induced reactions at energies above the Coulomb *** between breakup modes and breakup components as well as their variations with the incident energy are *** results will help us better understand the breakup effects of weakly bound nuclei on the suppression of a complete fusion,particularly for the above-barrier energies.

关键词： breakup mechanism coincidence measurement weakly bound nucleus

Characterization of CIAE developed double-sided silicon strip detector for charged particles

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2018年第5期29卷 98-103页

作者： Xin-Xing Xu Fanurs C.E.Teh Cheng-Jian Lin Jenny Lee Feng Yang Zhao-Qiao Guo Tian-Shu Guo Li-Jie Sun Xin-Zhi Teng Jia-Jian Liu Peng-Jie Li Peng-Fei Liang Lei Yang nan-ru ma Hui-Ming Jia Dong-Xi Wang Sylvain Leblond Taras Lokotko Qing-Qing Zhao Huan-Qiao Zhang China Institute of Atomic Energy Beijing 102413China Department of Physics The University of Hong KongPokfulam RoadHong KongChina College of Physics and Technology Guangxi Normal UniversityGuilin 541004China Beijing Kelixing Photoelectric Technology Co. Ltd.Beijing 102413China

A double-sided silicon strip detector(DSSD)with active area of 48 mm x 48 mm and thickness of300μm has been developed. Each side of DSSD consists of48 strips, each with width of 0.9 mm and inter-strip separation of 0.1 mm. Electrical properties and detection performances including full depletion bias voltage, reverse leakage current, rise time, energy resolution and cross talk have been studied. At a bias of 80 V, leakage current in each strip is less than 15 nA, and rise time for alpha particle at 5157 keV is approximately 15 ns on both *** energy resolutions have been achieved with0.65-0.80% for the junction strips and 0.85-1.00% for the ohmic strips. The cross talk is found to be negligible on both sides. The overall good performance of DSSD indicates its readiness for various nuclear physics experiments.

关键词： Double-sided silicon strip detector P-stop Detection performance Cross talk

质子滴线核^(17)F在近库仑势垒能区的反应机制研究进展

在线全文

学校读者我要写书评

暂无评论

科学通报 2021年第27期66卷 3544-3552页

作者：杨磊林承键贾会明马南茹王东玺杨峰温培威中国原子能科学研究院核物理研究所北京102413 广西师范大学物理科学与技术学院桂林541004

质子滴线核在近库仑势垒能区的反应机制研究是当前核物理领域的热点问题.本文对国内外开展的^(17)F在近库仑势垒能区的实验研究进行了回顾和总结.为了深入探索^(17)F的反应机制,本课题组相继开展了^(17)F+^(12)C,89Y和^(208)Pb的弹性散... 详细信息

质子滴线核在近库仑势垒能区的反应机制研究是当前核物理领域的热点问题.本文对国内外开展的^(17)F在近库仑势垒能区的实验研究进行了回顾和总结.为了深入探索^(17)F的反应机制,本课题组相继开展了^(17)F+^(12)C,89Y和^(208)Pb的弹性散射研究以及^(17)F+^(58)Ni的全反应道研究.目前的弹性散射研究表明,在大范围的靶区内,^(17)F的破裂连续态对弹性散射的耦合效应并不显著.对于破裂反应,在近垒能区只有^(17)F+^(58)Ni体系的细致研究.研究表明,去弹破裂是主要的^(16)O产生机制.而对于熔合反应,目前只有^(17)F+^(58)Ni和^(208)Pb两个体系的实验结果.^(17)F+^(58)Ni体系在垒下表现出明显的总熔合截面增强现象.理论计算表明,这种增强主要是由^(17)F连续态的耦合效应导致.而对于^(17)F+^(208)Pb,其总熔合激发函数与^(19)F+^(208)Pb基本相同.^(17)F+^(58)Ni和^(208)Pb体系熔合激发函数的差异还需要进一步研究.

关键词：质子滴线核^(17)F 近库仑势垒能区弹性散射破裂反应熔合反应