最新刊期
      卷 0 ， 期 0 ， 2020
      • YAN Guanyun1 HUANG Chaoqiang1 XIA Qingzhong1 CHEN Bo1 HUANG Ming2 NIE Fude2 WU Zhonghua3 1
        Vol. 33, Issue 3, (2010)
        摘要：The micro-defects of D-RDX were analyzed by small angle X-ray scattering(SAXS).Scale and density of micro-defects in the D-RDX of different the qualities during the crystal growing were investigated.The results show that the larger D-RDX crystals have less micro-defect density and better crystal quality.Micro-defects with orientated distributions in the D-RDX indicated anisotropic microstructure in D-RDX.  
        关键词：SAXS;D-RDX;Micro-defects   
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        发布时间：2021-03-05
      • LI Li1,2 FONG Songlin1 ZHU Jihao1 FENG Xiangqian1 XIE Guoxi1 YAN Lingtong1 1
        Vol. 33, Issue 3, (2010)
        摘要：In order to study elemental composition of ancient porcelain samples,we developed a set of ceramic reference materials for non-destructive quantitative analysis.In this paper,homogeneity of Al,Si,K,Ca,Ti,Mn and Fe contents in the ceramic reference materials is investigated by EDXRF.The F test and the relative standard deviation are used to treat the normalized net counts by SPSS.The results show that apart from the DY2 and JDZ4 reference materials,to which further investigation would be needed,homogeneity of the DH,DY3,JDZ3,JDZ6,GY1,RY1,LQ4,YJ1,YY2 and JY2 meets the requirements of ceramic reference materials for non-destructive quantitative analysis.  
        关键词：Ceramic reference materials;Homogeneity test;EDXRF   
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        发布时间：2021-03-05
      • WANG Hongwei TIAN Wendong LI Yulan WU Hongli ZHANG Guoqiang ZHOU Pei SUN Xiaoyan MA Yugang CAI Xiangzhou FANG Deqing GUO Wei CHEN Jingen CAO Xiguang FU Yao SHI Yu
        Vol. 33, Issue 3, (2010)
        摘要：CUORE(Cryogenic Underground Observatory for Rare Events) is one neutrino detection system.Techniques and methods to control the radiation during the CUORE module production are introduced,including the results heavy elements amount in TeO2 powder and acid,gamma ray measurement,the detection efficient of the gamma ray HPGe detector and the comparison with GEANT4 simulation.  
        关键词：Neutrino mass;Neutrinoless double-beta decay;ICP-MS;γ-ray measurement;Detection efficient   
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        发布时间：2021-03-05
      • YAO Shude DING Zhibo WANG Kun CHEN Di FA Tao CHEN Tianxiang
        Vol. 33, Issue 3, (2010)
        摘要：In this paper,we focus on constitution,magnetism modification and characterization of GaN-based materials using ion beam technology and formation of the nano structure by implanting Mn+ or Co+ ion of different doses into the film samples.SQUID and AGM were used to measure the magnetic properties,such as coercivity and saturation magnetization,for the samples before and after annealing,M-H and M-T curves showed ferromagnetism in the films at both low temperature and room temperature.RBS/C,PIXE and XRD were used to analyze the microstructure,content of doping transition metal and damage.The nano-cluster of ferromagnetism particle was observed under HRTEM.  
        关键词：Semiconductor;Nano magnetic materials;Ion beam technology   
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        发布时间：2021-03-05
      • CHANG Shuquan CHEN Da DAI Yaodong ZHANG Yali KANG Bin
        Vol. 33, Issue 3, (2010)
        摘要：Silk fibroin coated CdS quantum dots(SF-CdS QDs) were successfully synthesized in an aqueous system at room temperature under 60Co γ-ray irradiation.The prepared QDs were characterized by transmission electron microscopy(TEM),energy dispersion spectrometry(EDS),Fourier transform infrared spectrometer(FT-IR),X-ray diffraction(XRD),ultraviolet-visible spectroscopy(UV-vis) and photoluminescence(PL) spectrometry.The synthesized QDs were about 5 nm in diameter with excellent water-solubility.The QDs showed strong visible yellow-green luminescence under UV excitation,at an emission peak of around 538 nm.This method could be conveniently extended to fabricate other nanoparticles coated with silk fibroin.  
        关键词：Radiation synthesis;Quantum dots;CdS;Silk fibroin   
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        发布时间：2021-03-05
      • DU Jinfeng
        Vol. 33, Issue 3, (2010)
        摘要：Neutron energy spectra were simulated by the MCNP code.The neutron energy spectra and corresponding average energy of off-coupling box,irradiation channel and outer surface of the off-coupling cover were calculated.The results indicate that about 90% neutrons are in the energy range of 0.05–3 MeV.The average neutron energy of off-coupling box and irradiation channel present "S" shape along distance,and space asymmetry must be considered.The average neutron energy above off-coupling cover’s 45° woof fluctuates slightly and it is an appropriate irradiation area.  
        关键词：Neutron spectra;Burst reactor;Neutron radiation;Monte Carlo   
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        发布时间：2021-03-05
      • CHEN Hua HUANG Chaoqiang SUN Guangai CHEN Bo
        Vol. 33, Issue 3, (2010)
        摘要：In order to develop a neutron diffractometer for residual stress analysis,the components,i.e.guide,monochromator,collimators are simulated and optimized using Monte-Carlo simulation software McStas in the paper.The results have been proved as essential data that can be the basis for designing the residual stress neutron diffractometer and promoting the development of neutron diffraction technology.  
        关键词：Monte Carlo simulation;Residual stress neutron diffractometer;McStas   
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        发布时间：2021-03-05
      • LI Xinxi WANG Yan HUANG Chaoqiang CHEN Bo
        Vol. 33, Issue 3, (2010)
        摘要：Different samples need different resolution requirements of a neutron reflectometer.To achieve this,a space-adjustable neutron chopper with four disks was designed.The principle is adjusting the disk rotation frequency,according to the space difference from the 2# disk to the 3# and 4# disks.The new design was simulated with Mcstas codes,and the intensity and horizontal divergence as function of different physical parameters in given conditions were obtained.The results provide theoretical basis for designing the four-disk chopper of a horizontal geometry scattering neutron reflectometer.  
        关键词：Four-disk chopper;Model design;Mcstas software;Simulation   
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        发布时间：2021-03-05
      • YANG Yuqing WANG Guanquan HU Rui GAO Hui LIU Yebing ZHANG Huaming LUO Shunzhong
        Vol. 33, Issue 3, (2010)
        摘要：Based on the principle of radiation-voltaic effect,a preliminary energy-conversion unit of radiation-voltaic battery was designed.Three energy-conversion units were manufactured and their electric I-V properties under irradiation of solid sources of 63Ni and 3H were measured.The I-V curves were analyzed and some ideas for improvement were presented.It was found that the designed energy-conversion unit deteriorated dramatically under irradiation of 241Am source.The best Uoc and Isc gained under irradiation of 2.96×108 Bq 63Ni were 0.267 V and 28.4 nA,and were 0.260 V and 62.8 nA under irradiation of a 5.09×109 Bq 3H source.Further efforts are being made to improve the design.  
        关键词：Radiation-voltaic effect;Isotope battery;Energy-conversion unit;Preliminary design   
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        发布时间：2021-03-05
      • XIA Xiulong XIONG Liangping REN Xingbi LUO Yangming FU Zhonghua LIU Jun GU Mei
        Vol. 33, Issue 3, (2010)
        摘要：Cryogenic distillation is an effective technology for large scale hydrogen isotope separation.A brief introduction was given to the key technology of gas purification,refrigeration and vacuum,measure and control,safety and protection.The wide applications of cryogenic distillation in heavy water production,heavy water detritiation and upgrade,fuel recycle in fusion reactors,and weapon were reviewed.An analysis was made for necessity of this technology in China,and the future work to be carried out was proposed.  
        关键词：Hydrogen isotopes separation;Cryogenic distillation;Tritium   
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        发布时间：2021-03-05
      • XIA Xiulong
        Vol. 33, Issue 3, (2010)
        摘要：A theoretical model was established to study the separation of hydrogen isotopes by electrolysis-distillation process,and separation performance of D2/HD/DT was investigated.HD and DT separations behaved differently in electrolysis cell due to their different separation factors.DT concentration increased linearly with time in the reboiler of the first distillation column,reaching a concentration of about 68 times higher than the feeding concentration at 48 h.HD and DT concentration in the reboiler of the second distillation column was decontaminated by one and two orders of magnitude,respectively.HD and DT can be removed by electrolysis-distillation process,as an effective method for heavy water upgrading and detritiation.  
        关键词：Hydrogen isotopes separation;Cryogenic distillation;Tritium;Heavy water   
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        发布时间：2021-03-05
      • JIN Shuoxue1 GUO Liping1 PENG Guoliang1 ZHANG Jiaolong1 YANG Zheng1 LI Ming1 LIU Chuansheng1 JU Xin2 LIU Shi3 1
        Vol. 33, Issue 3, (2010)
        摘要：The accumulation of helium and/or hydrogen in nuclear materials may cause performance deterioration of the materials.In order to provide a unique tool to investigate the He-and/or H-caused problems,such as interaction of helium with hydrogen and defects,formation of gas bubbles and its evolution,and the related effects,we designed a low energy(≤20 keV) cold cathode Penning ion source,which will be interfaced to a 200 kV transmission electron microscope(TEM),for monitoring continuously the evolution of micro-structure during the He+ or H+ ion implantation.Studies on discharge voltage-current characteristics of the ion source,and extraction and focusing of the ion beam were performed.The ion source works stably with 15–60 mA of the discharge current.Under the gas pressure of 5×10–3 Pa and 1.5×10–2 Pa,the discharge voltage are about 380 V and 320 V,respectively.The extracted ion current under lower gas pressure is greater than that under higher gas pressure,and it increases with the discharge current and extraction voltage.The ion lens consisting of three equal-diameter metal cylinder focus the ion beam effectively,so that the beam density at the 150 cm away from the lens exit increases by a over one order of magnitude.For ion beams of around 10 keV,the measured beam density is about 200 nA·cm–2,which is applicable for ion implantation and in situ TEM observation for many kinds of nuclear materials.  
        关键词：Ion source;Radiation damage;In situ TEM;Helium   
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        发布时间：2021-03-05
      • GUAN Rui WENG Kuiping REN Xingbi XIE Bo HOU Jianping LIU Yunnu
        Vol. 33, Issue 3, (2010)
        摘要：In this paper we describe a flow proportional counter for online monitoring of tritium production.The counter plateau curve,background and efficiency were tested and online measurement experiment was carried out for developing the tritium monitor.The results show that it can be used in online monitoring of the tritium production system.  
        关键词：Flow proportional counter;Tritium;Measurement   
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        发布时间：2021-03-05
      • LE Renchang HE Zhijie LU Yu YE Quanyi HONG Jinquan ZHOU Baoyong CHEN Jiandi
        Vol. 33, Issue 3, (2010)
        摘要：Various experiments to measure radon migration coefficients indicated that the migration of radon and its daughters is directional.The horizontal diffusion data of radon in the air has been measured and studied in laboratory conditions using the accumulative radon-measurement method in a static state with high sensitivity.The mathematical calculation to obtain horizontal diffusion coefficients of radon under the condition of different temperature is done by fitting a difference equation to the measured radon diffusion data.A linear positive correlation coefficient of 0.92 between horizontal diffusion coefficient of radon and diffusion temperature,was obtained.The horizontal diffusion coefficient of radon is 0.049 cm2·s–1 at constant temperature of 30°C.To obtain the typical radon diffusion coefficient of 0.1 cm2·s–1,the diffusion condition of above 40°C can be deduced.  
        关键词：Radon and its daughters;Diffusion coefficient;Constant temperature;Air temperature   
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        发布时间：2021-03-05
      • CHEN Shixun CHEN Chang’an XIONG Yifu
        Vol. 33, Issue 3, (2010)
        摘要：In order to quantitatively evaluate residual tritium in structural materials and aged hydrogen storage materials,chemical etching is used to determine the concentration and distribution of tritium in stainless steel,and the residual tritium in aged uranium bed for tritium storage after isotope exchange.The results show that the stainless steel samples after 13 years of tritium storage retains tritium mainly in the surface layer of 120 μm,the average residual tritium concentration in stainless steel is about 9.37×10–4 mmol/g in the etching depth of 110.6 μm,and the average residual tritium concentration in uranium powder is about 4.16×10–5 mmol/g.Trace tritium in metals can be measured with high sensitivity and residual tritium can be correctly determined by using this method.  
        关键词：Residual tritium;Stainless steel;Aged uranium tritide   
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        发布时间：2021-03-05
      • YANG Yong WANG Heyi DU Yang JIANG Shubin
        Vol. 33, Issue 3, (2010)
        摘要：In order to decontaminate waste tritium gas,Pt or Pd catalysts on inorganic carrier were prepared by wet impregnation.At environmental temperature,the catalysts exhibit good effect in the catalysis reaction of tritium gas oxidation,with an efficiency of tritium gas oxidation of over 90%,being well suitable for tritium waster gas processing.Physicochemical properties and structure of the catalysts were examined by XRD.The results showed that carrier revision enhanced the crystallization degree of carriers,this will improve the hydrophobic property of carriers,and the revision of carriers reduced the crystal size of Pt,enhance the dispersion of Pt.The method of deoxidize after ablation and Pt loading reduced the dispersion degree of Pt.ZrO2 reduced the crystal size of Pd,enhanced the dispersion of Pd.  
        关键词：Hydrophobic catalyst;Inorganic carrier;Tritium gas   
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        发布时间：2021-03-05
      • DU Yang YANG Yong JIANG Shubin WANG Heyi
        Vol. 33, Issue 3, (2010)
        摘要：In order to remove waste tritium permeated from inflating tritium system,an autocontrol detritiation system was designed according to requirements for removing waste tritium gas from inflating tritium process.The parameters for volumn of the catalyst reaction chamber and tritium water drying was calculated,and the function of autocontrol software was designed,too.Through the circulating disposal model test,it was found that in a 1 m3 closed container,the deuterium concentration reduced by two orders of magnitude in 35 min,and efficiency of detritiation system reached above 95% in average from five measurements with 30 L tritium in the closed container.  
        关键词：Detritium;Autocontrol;Test;Efficiency   
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        发布时间：2021-03-05
      • XIONG Zhengye1 MA Weijiang2 ZHU Jinhan2 CHEN Jinmin1 DING Ping1 SHI Wenqing1 1
        Vol. 33, Issue 3, (2010)
        摘要：Sand samples were collected at different locations from the Huguangyan Maar Lake region in Zhanjiang,Guangdong province in south China.Thermoluminescence(TL) and optical stimulated luminescence(OSL) were measured with coarse grain technique.The TL and OSL dose response were analyzed and their ancient doses were calculated.The result shows that ancient doses measured with TL technique differ from those measured with OSL technique for the same sample,whereas for the samples whose TL ancient dose is close to the veraciousness,there were no evident degree of difference between the ancient doses by OSL and TL.The experiments and analyses can be used for reference in Quaternary period volcano dating.  
        关键词：Thermoluminescence(TL);Optical Stimulated Luminescence(OSL);Huguangyan Maar Lake;Quartz   
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        发布时间：2021-03-05
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