检索结果-南通市图书馆

Journal of Rare Earths 2023年第12期41卷 1911-1918,I0004页

作者： Vasili Retivov Valery Dubov Daria Kuznetsova Artem Ismagulov Mikhail Korzhik NRC"Kurchatov Institute" 1Kurchatov Sq123098MoscowRussia NRC"Kurchatov Institute" IREA3 Bogorodsiy val107076MoscowRussia Institute for Nuclear Problems of Belarus State University 11 Bobruiskaya220030MinskBelarus

Tailoring of the composition of the scintillation ceramics Gd_(x)Ce_(0.03)Al_(2)Ga_(3)O_(12)(x=2.89-3.07) heavily doped with Ce was *** co-precipitation is found to be quite a useful method to provide a purpo seful deviation of Gd content from the stoichio metric ratio in powders for their further compacting and sintering in the *** effect of the composition variations on microstructure,phase composition,luminescent and scintillation characteristics is *** is shown that Gd content below the stoichiometric composition leads to increasing the grain size but,quenching of the photoluminescence and the scintillation,whereas excess Gd leads to higher luminosity;the maximum value is obtained for the composition with an excess of Gd ~2%.Ceramics possess a light yield of -50000 ph/MeV,effective scintillation kinetics of 50 ns,and is a good candidate for application in a new generation of scanners utilizing pulsed X-ray sources.

关键词： Scintillation ceramics Complexgarnet Composition Stoichiometry light yield Scintillation kinetics

Design optimization of plastic scintillators with wavelength-shifting fibers and silicon photomultiplier readouts in the top veto tracker of the JUNO-TAO experiment

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2023年第7期34卷 99-112页

作者： Guang Luo Y.K.Hor Pei-Zhi Lu Zhi-Min Wang Ru-Hui Li Min Li Yi-Chen Li Liang Zhan Wei Wang Yue-Huan Wei Yu Chen Xiang Xiao Feng-Peng An School of Physics Sun Yat-sen UniversityGuangzhou 510275China Institute of High Energy Physics Beijing 100049Chin a 3 University of Chinese Academy of Sciences Beijing 100049China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China

Plastic scintillators(PSs)embedded with wavelength-shifting fibers are widely used in high-energy particle physics,such as in muon taggers,as well as in medical physics and other *** this study,a simulation package was built to evaluate the effects of the diameter and layout of optical fibers on the light yield with different *** optimal optical configuration was designed based on simulations and validated using two PS prototypes under certain experimental condi-tions.A top veto tracker(TVT)for the JUNO-TAO experiment,comprising four layers of 160 strips of PS,was designed and *** threshold was evaluated when the muon tagging efficiency of a PS strip was>99%.The efficiency of three layer out of four layer of TVT is>99%,even with a tagging efficiency of a single strip as low as 97%,using a threshold of 10 photoelectrons and assuming a 40%silicon PM photon detection efficiency.

关键词： Plastic scintillator WLS fiber light yield Optical transmission performance Muon tagging efficiency JUNO-TAO

Property measurement of the CsI(Tl) crystal prepared at IMP

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2008年第2期32卷 135-138页

作者：陈若富徐瑚珊樊瑞睿詹文龙肖国青李松林王建松黄天衡郑川余玉洪王猛胡正国叶飞王玥贾飞岳珂欧阳珍 Institute of Modern Physics Chinese Academy of Sciences Lanzhou 730000China

Large-sized CsI（Tl） single crystals, -φ 0100 mm×350 mm, have been grown successfully, and this CsI（Tl） coupled with PD has been successfully utilized at RIBLL （the Radioactive Ion Beam Line in Lanzhou） to measure the energy of heavy ions as a stopping detector. The performances of CsI（Tl） detector coupled with PD and APD have been tested and compared, including the temperature dependence of scintillating light yield.

关键词： CsI(Tl) light yield energy resolution temperature dependence

Design and Synthesis of Tb^(3+)-doped KGW Crystal for the Exploration of Scintillation Performance with X-ray Imaging

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2021年第8期40卷 1023-1030,969页

作者：徐慧徐薇薇徐刘伟王志林王帅华苏檠张必胜曾庆有吴少凡 College of Chemistry Fuzhou UniversityFuzhou 350108China Key Laboratory of Optoelectronic Materials Chemistry and Physics Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient DevicesFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Fujian Communications Planning&Design Institute Company Fuzhou 350004China Fujian Luhai Engineering Investigation&Designing Company Fuzhou 350000China

X-ray scintillators have been widely used in many fields owing to their strong penetrating ability,including security inspection,medical imaging,nuclear cameras,high energy physics and so *** explore new scintillation materials,we designed and synthesized KGW:Tb bulk scintillation crystals with monoclinic phase *** explored the fluorescence performance of KGW:Tb by testing the photoluminescence spectrum and fluorescence decay curve and observed strong green light emission in the visible light range at room ***,our crystal has a high stability under X-ray irradiation,a good sensitivity response and an appreciable light output(3424 ph/MeV)that is approximately twenty times more than ***,we used a 0.98 mm thickness polished crystal sheet for X-ray imaging applications and observed excellent ***,KGW:Tb crystal may be an important direction for X-ray scintillation detection.

关键词： KGW X-ray scintillators light yield high stability X-ray imaging

Scintillating properties of LiYSiO_4:Ce

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2011年第12期35卷 1134-1138页

作者：付在伟衡月昆祁鸣黄品文张怀金王继扬贾茹钱森李绍莉陈晓辉宁哲 Physics Department of Nanjing University Institute of High Energy Physics Chinese Academy of Sciences Institute of Crystal Materials Shandong University College of Physical Science and Technology Huazhong Normal University

LiYSiO4：Ce is a promising scintillator and some of its properties have been reported in previous papers. In this paper, samples doped with different concentrations of Ce are prepared and studied. First, the relative light yields of the samples are measured as 28.1%-37.1% compared with a standard anthracene crystal being irradiated by a particles and as -27.270 compared with NaI being irradiated by X-rays. Second, the effects of sample thicknesses on light yields are presented. Finally the timing behaviors of samples with different doped concentrations being irradiated with alpha particles and X-rays are discussed. The result shows that LiYSiOa：Ce is a kind of fast scintillator （- 30 ns） with a moderate light yield that can be used for neutron detection.

关键词： LiYSiO4:Ce Ce^3+ neutron scintillator light yield decay time

Scintillation Properties of Ce^(3+)/Tb^(3+) Co-doped Oxyfluoride Glass with the Exploration of Imaging Application

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2021年第10期40卷 1337-1345页

作者： CHEN Da-Yi LI Yan WU Yi-Heng WANG Zhi-Lin WANG Shuai-Hua SU Qing ZHANG Bi-Sheng ZENG Qing-You WU Shao-Fan University of Chinese Academy of Sciences Chinese Academy of SciencesBeijing 100039China Key Laboratory of Optoelectronic Materials Chemistry and Physics Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient DevicesFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China College of Chemistry Fuzhou UniversityFuzhou 350108China Fujian Luhai Engineering Investigation&Designing Company Fuzhou 350007China

Scintillator is a material that converts high-energy rays into visible light, and has great applications in high-energy physics, medical imaging, and security inspections. As a type of scintillator, scintillation glass has the advantages of low cost, high stability, controllable shape, and ability to be prepared on a large scale. In this paper, a traditional fusion quenching method was used to prepare a cerium-terbium co-doped glass. The green characteristic light of Tb ion was observed at 543 nm. Moreover, through the doping sensitization of Ce ions, the luminescence of Tb was successfully enhanced. The material has high X-ray response sensitivity, complete stability and strong X-ray emission intensity. We use a simple X-ray imaging platform for imaging, and the results show that our glass has a spatial resolution of 7.0 lp/mm.

关键词： scintillators light yield glass X-ray imaging luminescence

Preliminary test results of LAr prototype detector

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2016年第11期40卷 133-137页

作者：李佩弦关梦云杨长根张鹏刘金昌张永鹏郭聪王毅 Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

Liquid argon （LAr） is an attractive target for the direct detection of WIMPs. A LAr prototype detector was designed to study the technology and properties of LAr detectors. The prototype detector had an active volume containing 0.65 kg of liquid argon. A liquid nitrogen （LN） cooling system allowed the temperature fluctuation of the liquid argon to be controlled within less than 0.1 K during a one month run. In the 22Na calibration run, the LAr prototype obtained 1.59±0.02 p.e./keV light yield for 511 keV gamma rays using a domestic-made argon purification system.

关键词： LAr technology LAr purification light yield dark matter

Improvement on the Luminescence Property of Y, Sb Co-doped PbWO_4 Single Crystal

在线全文

学校读者我要写书评

暂无评论

High Technology Letters 2001年第2期7卷 87-88页

作者：杨春晖 Shi Pengfei Chen Gang Department of Applied Chemistry Harbin Institute of Tecnology Beijing Glass Research Institute

The effect of Y and Sb co-doping on the luminescence property of PbWO 4 crystals has been investigated. Compared with undoped PbWO4, the transmittance and emission peak intensity of Y∶Sb∶PbWO 4 crystals were obviously improved. In addition, its transmittance cutoff wavelength and emission peak shifted to the shorter one. The mechanism of effect of Y and Sb on the transmittance spectra was briefly discussed. The light yield of Y∶Sb∶PbWO 4 crystals was 25p.e./MeV, which was two times of that of undoped PbWO 4. Our experiments showed that Y and Sb co-doping was a selectable method to improve the luminescence property of PbWO 4.

关键词： Y∶Sb∶PbWO4 crystal Transmittance Exicted-emission spectra light yield

Calibration of liquid argon detector with ^(83m)Kr and ^(22)Na in different drift fields

在线全文

学校读者我要写书评

暂无评论

Radiation Detection Technology and Methods 2020年第2期4卷 147-152页

作者： Wei-Xing Xiong Meng-Yun Guan Chang-Gen Yang Peng Zhang Jin-Chang Liu Cong Guo Yu-Ting Wei You-Yu Gan Qing Zhao Jia-Jun Li Institute of High Energy Physics Beijing 100049China University of Chinese Academy of Sciences Beijing 100049China North China Electric Power University Beijing 100096China

Introduction Liquid noble gases are widely used as targets in low background search experiments,particularly in direct dark matter search experiments.83mKr is an excellent low-energy internal calibration source for future larger liquid noble gas *** To calibrate liquid argon detector with 83mKr in different drift fields and to study the correlation between light yield and drift *** A dual-phase LAr prototype detector was designed to study the 83mKr responses in liquid argon.83mKr atoms are produced through the decay of 83Rb and introduced into the LAr detector through the circulating purification *** We report that the light yield reaches 7.26±0.02 pe/keV for 41.5 keV from 83mKr and 7.66±0.01 pe/keV for 511 keV from 22Na,as a *** stopping the fill,the rate decays of 83mKr are with a fitted half-life of 1.83±0.11 h,which is consistent with the reported value of 1.83±0.02 *** light yield that varies with the drift electric field from 0 to 200 V/cm has also been reported.

关键词： Time projection chamber Noble liquid detectors light yield Liquid argon

Preparation and Properties of Scintillating Glasses in the SiO_2-Li_2O-CaO-Gd_2O_3 System

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

Journal of Wuhan University of Technology(Materials Science) 2007年第B12期22卷 860-862页

作者：朱冬梅 State Key Laboratory of Solidification Processing Northwestern Polytechnical University

A series of scintillating glass in SiO2-Li2O-CaO, SiO2-Li2O-CaO-Gd2O3 were developed to explore the influence of different composition on the density and the luminescent properties of the sample. The effects of Ce^3＋ sources and melting atmosphere on the light yield of the scintillating glass were investigated. Results show that the highest density of the scintillating glass in this study is as high as 3.3 g/cm^3 and the highest light yield have reached 1175 phonons/Mev, which is about 3% of the light output of NaI：Ti. The introduction of Gd2O3 in the system could increase the glass density visibly and do not lower the light yield of the scintillating glass. The glass-melting atmosphere has strong influence on the light yield of Ce^3＋-doped scintillating glasses and strong reducing atmosphere results in high light yield. The light yield of scintillating glass with Ce^3＋ from CeF3 is much higher than that of corresponding glass with Ce^3＋ from Ce2O3.

关键词： scintillating glass light yield high density