检索结果-南通市图书馆

Particle identification using CsI(Tl) crystal with three different methods

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 2008年第6期19卷 354-357页

作者： LAN Changlin RUAN Xichao LIU Gang KONG Xiangzhong zhou zuying School of Nuclear Science ＆ Technology Lanzhou University Lanzhou 730000 China Department of Nuclear Physics China Institute of Atomic Energy Beijing 102413 China

Three pulse-shape-discrimination (PSD) methods are applied to study the particle identification (PID) by using CsI(Tl) crystal, especially for identifying light charged particles. The zero-cross time method, fast and total component method and signal rise time method are used. The experiment, data analysis and results are compared. Good PID for p, α and γ can be achieved with a CsI(Tl)-photomultiplier assembly.

关键词： CsI(Tl)晶体 PID PSD 原子核核技术

Probing dark matter particles from evaporating primordial black holes via electron scattering in the CDEX-10 experiment

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2024年第10期Mechanics & Astronomy) .卷 87-95页

作者： Zhenhua Zhang Litao Yang Qian Yue Kejun Kang Yuanjing Li Haipeng An Greeshma C. Jianping Chang Yunhua Chen Jianping Cheng Wenhan Dai Zhi Deng Changhao Fang Xinping Geng Hui Gong Qiuju Guo Tao Guo Xuyuan Guo Li He Shengming He Jinwei Hu Hanxiong Huang Tuchen Huang Lin Jiang S.Karmakar Haubin Li Hanyu Li Jianmin Li Jin Li Qianyun Li Renmingjie Li Xueqian Li Yulan Li Yifan Liang Bin Liao FongKay Lin ShinTed Lin Jiaxuan Liu Shukui Liu Yandong Liu Yu Liu Yuanyuan Liu Hao Ma Yucai Mao Qiyuan Nie Jinhua Ning Hui Pan Ningchun Qi Jie Ren Xichao Ruan Monoj Kumar Singh Tianxi Sun Changjian Tang Yang Tian Guangfu Wang Junzheng Wang Li Wang Qing Wang Yufeng Wang Yunxiang Wang Henry Tsz-King Wong Shiyong Wu Yucheng Wu Haoyang Xing Rui Xu Yin Xu Tao Xue Yulu Yan Nan Yi Chunxu Yu Haijun Yu Jianfeng Yue Ming Zeng Zhi Zeng Bingtao Zhang Fengshou Zhang Lei Zhang Zhenyu Zhang Jizhong Zhao Kangkang Zhao Minggang Zhao Jifang zhou zuying zhou Jingjun Zhu CDEX Collaboration Key Laboratory of Particle and Radiation Imaging (Ministry of Education) and Department of Engineering Physics Tsinghua University Department of Physics Tsinghua University Institute of Physics Academia Sinica NUCTECH Company YaLong River Hydropower Development Company College of Nuclear Science and Technology Beijing Normal University College of Physics Sichuan University School of Physics Peking University Department of Nuclear Physics China Institute of Atomic Energy Sino-French Institute of Nuclear and Technology Sun Yet-sen University School of Physics Nankai University Department of Physics Banaras Hindu University Department of Physics Beijing Normal University

Dark matter（DM） is a major constituent of the ***,no definite evidence of DM particles（denoted as “χ”） has been found in DM direct detection（DD） experiments to *** is a novel concept of detectingχfrom evaporating primordial black holes（PBHs）.We search forχemitted from PBHs by investigating their interaction with target *** examined PBH masses range from 1×1015to 7×1016g under the current limits of PBH abundance *** 205.4 kg·day data obtained from the CDEX-10 experiment conducted in the China Jinping Underground Laboratory,we exclude the χ-electron（χ-e） elastic-scattering cross section σχe～5×10-29cm2for χ with a mass ■ keV from our *** the higher radiation background but lower energy threshold（160 eV）,CDEX-10 fills a part of the gap in the previous *** (mχ,σχe) can be determined in the future,DD experiments are expected to impose strong constraints on fPBHfor large MPBHs.

关键词： CDEX primordial black hole light dark matter particle dark matter-electron scattering high purity germanium detector

同方期刊数据库

NEUTRON SCATTERING ANGULAR DISTRIBUTION OF 238U AT E_n=10 MeV

在线全文

学校读者我要写书评

暂无评论

中国核科技报告 1990年第S2期 21-22页

作者： Sa Jun Qi Bujia zhou zuying Yu Chunying Sui Qingchang Shen Guanren Yu Baosheng Tang Hongqing (INSTITUTE OF ATOMIC ENERGY, BEIJING)

The neutron scattering angular distribution from238U at E_n=10 MeVwere tentatively *** measurements were performed by means of amulti-detector TOF spectrometer at HI-13 tandem accelerator.10 MeVneutrons were obtained using 7.1 MeV pulsed deuteron ion beam bombarding agas cell which is a stainless steel hollow cylinder of 2 cm long and 1 cm in diam-eter and filled with denterium gas to a pressure of 3.6×10 *** beam en-trance window was made of 5 μm thick Mo *** depleted238U sample is a 3

关键词： AT U AT E_n=10 MeV cm U AT E_n NEUTRON SCATTERING ANGULAR DISTRIBUTION OF

A Tritium Gas Target for Neutron Production at HI-13 Tandem Accelerator

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

中国核科技报告 1996年第S2期 7-10页

作者： Qi Bujia zhou zuying zhou Chenwei Tang Hongqing Du Yanfeng Chen Qingwang Li Jimin( China Institute of Atomic Energy, P. O. Box 275 (46), Beijing )

A tritium gas target has been built and employed in neutron physics experiments at HI-13 tandem accelerator. The gas target consists of a helium gas cell and a tritium gas cell whose entrance windows are made of 10 μm thick molybdenum foil. The gas target is intended as a neutron source using T(d,n)~4He and T(p,n)~3He reactions. Details of the target design and performance are given.

关键词： Target A Tritium Gas Target for Neutron Production at HI-13 Tandem Accelerator cell

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

中子俘获反应截面在线测量技术研究

原子能科学技术 2018年第9期52卷 1537-1544页

作者：石斌彭猛张奇玮贺国珠周祖英唐洪庆中国原子能科学研究院核数据重点实验室北京102413 国防科技大学文理学院湖南长沙410000

利用γ全吸收型4πBaF2探测装置,对中子俘获反应截面进行了在线测量。基于HI-13串列加速器提供的脉冲化质子束,通过7 Li(p,n)7Be反应产生中子,构建了keV能区中子源实验条件,经屏蔽准直后的中子轰击样品,应用4πBaF2装置在线测量(n,γ)... 详细信息

利用γ全吸收型4πBaF2探测装置,对中子俘获反应截面进行了在线测量。基于HI-13串列加速器提供的脉冲化质子束,通过7 Li(p,n)7Be反应产生中子,构建了keV能区中子源实验条件,经屏蔽准直后的中子轰击样品,应用4πBaF2装置在线测量(n,γ)反应复合核退激时释放的瞬发γ射线级联,测量了Au、C、Nb、空白等样品。通过计算93 Nb(n,γ)94 Nb和197 Au(n,γ)198 Au两个反应的截面数据比值并与文献数据比对,检验了4πBaF2探测装置和(n,γ)反应截面在线测量技术,为在中国散裂中子源(CSNS)上顺利开展(n,γ)反应截面数据测量工作提供了技术支持。

关键词： γ全吸收型4πBaF2探测装置中子俘获反应截面在线测量技术

在线全文

学校读者我要写书评

暂无评论

(n,γ)反应实验研究中的中子屏蔽设计

原子核物理评论 2015年第2期32卷 208-211页

作者：黄兴贺国珠程品晶张奇纬周祖英南华大学核科学技术学院湖南衡阳421001 中国原子能科学研究院北京102413

用γ射线全吸收型装置(Gamma-ray Total Absorption Facility,GTAF),可以对中子俘获反应截面进行高精度测量。为了降低实验本底,实验中需要对源中子进行准直和屏蔽,还要对被样品散射的中子进行吸收以减少它们进入探测器后所形成的干扰... 详细信息

用γ射线全吸收型装置(Gamma-ray Total Absorption Facility,GTAF),可以对中子俘获反应截面进行高精度测量。为了降低实验本底,实验中需要对源中子进行准直和屏蔽,还要对被样品散射的中子进行吸收以减少它们进入探测器后所形成的干扰。采用MCNP对中子的准直器、屏蔽体和中子吸收体进行了模拟设计,中子准直屏蔽体材料选用含硼聚乙烯(BC4的质量分数为3%)和铅。准直孔直径为13 mm,长度为500mm,经准直后样品处中子束斑坪顶直径为21 mm。中子吸收体材料选用聚乙烯和碳化硼,吸收体球壳内腔半径30 mm,聚乙烯壳层厚度60 mm,碳化硼壳层厚度10 mm,被样品散射的中子经吸收体后衰减93.7%。

关键词：中子准直中子屏蔽透射率束斑坪顶

在线全文

学校读者我要写书评

暂无评论

锂玻璃探测器中子探测效率的刻度

原子核物理评论 2013年第2期30卷 156-160页

作者：张奇玮贺国珠阮锡超李霞任杰周祖英中国原子能科学研究院北京102413

为了精确测量keV能区的中子俘获截面,中国原子能科学研究院正在建造一台4π全吸收型γ探测装置GTAF,锂玻璃探测器将会作为中子束流监视器测量中子能谱。利用5SDH-2加速器刻度了锂玻璃探测器在两个入射中子单能点(250和565 keV)的探测效... 详细信息

为了精确测量keV能区的中子俘获截面,中国原子能科学研究院正在建造一台4π全吸收型γ探测装置GTAF,锂玻璃探测器将会作为中子束流监视器测量中子能谱。利用5SDH-2加速器刻度了锂玻璃探测器在两个入射中子单能点(250和565 keV)的探测效率,并使用GEANT4和MCNP程序模拟计算了锂玻璃探测器的相对探测效率。通过归一化实验数据和模拟结果,得到了锂玻璃探测器在10keV～1 MeV能区的中子探测效率曲线。对于把锂玻璃探测器测量得到的飞行时间谱转化为中子束流能谱,是一项非常重要的工作,同时为探测器效率刻度提供了新方法。

关键词： γ全吸收型探测装置锂玻璃探测器探测效率 GEANT4 MCNP

10MeV中子引起的^(238)U、^(209)Bi和Fe的次级中子双微分截面测量

在线全文

学校读者我要写书评

暂无评论

原子能科学技术 1999年第6期33卷 497-504页

作者：祁步嘉唐洪庆周祖英周陈维柯尊建孙振强沈冠仁夏海鸿中国原子能科学研究院核物理研究所北京102413

８～１３ＭｅＶ中子能区次级中子双微分截面的测量数据至今很少。联合使用中国原子能科学研究院建成的常规多探测器快中子飞行时间谱仪和相继创建的非常规快中子飞行时间谱仪进行了１０ＭｅＶ中子对２３８Ｕ、２０９Ｂｉ和Ｆｅ的次... 详细信息

８～１３ＭｅＶ中子能区次级中子双微分截面的测量数据至今很少。联合使用中国原子能科学研究院建成的常规多探测器快中子飞行时间谱仪和相继创建的非常规快中子飞行时间谱仪进行了１０ＭｅＶ中子对２３８Ｕ、２０９Ｂｉ和Ｆｅ的次级中子双微分截面的测量，并将测量结果和理论计算结果进行了比较。

关键词：双微分截面次级中子谱仪铀238 铍209 铁

Performances of a prototype point-contact germanium detector immersed in liquid nitrogen for light dark matter search

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2019年第3期62卷 58-65页

作者： Hao Jiang LiTao Yang Qian Yue KeJun Kang JianPing Cheng YuanJing Li Henry Tsz-King Wong M.A?artio?lu HaiPeng An JianPing Chang JingHan Chen YunHua Chen Zhi Deng Qiang Du Hui Gong Li He Jin Wei Hu QingDong Hu HanXiong Huang LiPing Jia HauBin Li Hong Li Jian Min Li Jin Li Xia Li XueQian Li YuLan Li Bin Liao FongKay Lin ShinTed Lin ShuKui Liu YanDong Liu YuanYuan Liu ZhongZhi Liu Hao Ma JingLu Ma Hui Pan Jie Ren XiChao Ruan B.Sevda Vivek Sharma ManBin Shen Lakhwinder Singh Monoj Kumar Singh TianXi Sun ChangJian Tang WeiYou Tang Yang Tian GuangFu Wang JiMin Wang Li Wang Qing Wang Yi Wang ShiYong Wu YuCheng Wu HaoYang Xing Yin Xu Tao Xue SongWei Yang Nan Yi ChunXu Yu HaiJun Yu JianFeng Yue XiongHui Zeng Ming Zeng Zhi Zeng FengShou Zhang YunHua Zhang MingGang Zhao JiFang zhou zuying zhou JingJun Zhu ZhongHua Zhu Key Laboratory of Particle and Radiation Imaging (Ministry of Education)and Department of Engineering Physics Tsinghua University College of Nuclear Science and Technology Beijing Normal University Institute of Physics Academia Sinica Department of Physics Dokuz Eylül University Department of Physics Tsinghua University NUCTECH Company Ya Long River Hydropower Development Company College of Physical Science and Technology Sichuan University Department of Nuclear Physics China Institute of Atomic Energy School of Physics Nankai University Department of Physics Banaras Hindu University Department of Physics Beijing Normal University

The CDEX-10 experiment searches for light weakly interacting massive particles, a form of dark matter, at the China Jinping Underground Laboratory, where approximately 10 kg of germanium detectors are arranged in an array and immersed in liquid nitrogen. Herein, we report on the experimental apparatus, detector characterization, and spectrum analysis of one prototype detector. Owing to the higher rise-time resolution of the CDEX-10 prototype detector as compared with CDEX-1 B, we identified the origin of an observed category of extremely fast events. For data analysis of the CDEX-10 prototype detector, we introduced and applied an improved bulk/surface event discrimination method. The results of the new method were compared to those of the CDEX-1 B spectrum. Both sets of results showed good consistency in the 0-12 ke Vee energy range, except for the 8.0 keV K-shell X-ray peak from the external copper.

关键词： WIMP pPCGe liquid nitrogen bulk/surface event discrimination extremely fast events