最新刊期
      卷 0 ， 期 0 ， 2020
      • LIANG Hongbin HE Hong ZENGQinghua WANG Shubin SUQiang HU Tiandou XIEYaning ZHANG Jing LIU Tao WU Ziyu
        Issue 12, (2003)
        摘要：The Eu-L3 edge XANES and luminescent spectra of CaBPO5:Eu, SrB4O7:Eu and Ba3(PO4)2:Eu prepared by solid state reaction at high temperature in air were determined. It can be observed from the Eu-L3 edge XANES spectra that energy of Eu3+-L3 edge is 7-8 eV higher than that of Eu2+-L3 edge in the luminescent materials. The 4f-5d transition of Eu2+ and the 4f-4f transition of Eu3+ can be found simultaneously in the excitation and emission spectra of these materials, respectively. The results of Eu-L3 edge XANES and luminescent spectra imply that Eu3+ can be partially reduced to Eu2+ in these materials when they were prepared in air atmosphere.  
        关键词：Europium;Calcium borophosphate;Strontium tetraborate;Barium ortho-phosphate;XANES;Luminescence   
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        发布时间：2021-03-12
      • GONG Yanjun LI Zhihong DONG Baozhong
        Issue 12, (2003)
        摘要：The characteristics of organo-functionalized mesoporous silicates were described. The incorporated organic groups in the mesochannels and their surface properties could be characterized by XRD, TEM, SEM, IR, NMR, Roman, TG, N2 physisorption techniques and bulk element analysis. The small angle X-ray scattering (SAXS), a powerful tool for the mesoporous materials was described in detail. SAXS explained the distribution of organic groups that appeared to be uniform in mesoporous silicas and the characteristics of interfacial layers that led to the scattering of pore distortion and gave a negative deviation from Porod’s law.  
        关键词：Mesoporous materials;Organo-functionalized MSU-X;Interfacial characteristics;SAXS characterization   
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        发布时间：2021-03-12
      • BIANQing XIE Zhi ZHANG Jing YAN Wensheng WEI Shiqiang YIN Shilong
        Issue 12, (2003)
        摘要：Structures of the mechanically alloyed Fe0.6Ni0.4 after milling for 5, 10, 20, 40 h were investigated by X-ray absorption fine structure (XAFS) and X-ray diffraction (XRD). The results show that after milling for 5 h the patterns with bcc-like structure of a-Fe and with fee-like structure of Ni were observed. After milling for 10-20h the patterns with bcc-like structure of a-Fe disappeared, and only the patterns with fee-like structure were observed. After milling for 40 h the weak patterns with bcc-like structure appeared again. So the mechanically alloyed Fe0.6Ni0.4 after milling for 40 h is not a homogeneous supersaturated solid solution.  
        关键词：X-ray absorption fine structure (XAFS);X-ray diffraction (XRD);Mechanical alloying   
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        发布时间：2021-03-12
      • SHEN Guobao ZHENG Lifang LIU Songqiang
        Issue 12, (2003)
        摘要：This paper describes a method for interfacing the middleware CORBA to EPICS-based distributed control system. EPICS interfaced with CORBA will greatly facilitate the design and development of high-level application software, improve software reusability and maintainability and provide an easy way to transplant software for modeling, simulation and machine operation analysis.  
        关键词：EPICS;CORBA;Control system   
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        发布时间：2021-03-12
      • LI Qinghui GUDonghong GAN Fuxi ZHANG Bin MA Bo CHENG Huansheng
        Issue 12, (2003)
        摘要：Chemical composition analysis is one of the most important research aspects to provide scientific proof for the technical origin and development of Chinese ancient glass. Proton induced X-ray emission (PIXE) technique is a kind of multi-element quantitative analysis method with high sensitivity and without destruction of samples. Chemical composition of the Western Han dynasty glass garment flakes, which were excavated from Yangzhou city, was analyzed by PIXE, quantitatively. It was found that these glass flakes were attributed to PbO-BaO-SiO2 glass originated in China. These flakes all consist of a glass core and a corroded outer layer with different thickness. There are relatively higher PbO, P2O5 and CaO, while much lower BaO and SiO2 in the corroded layers than in the glass cores. The experimental results were discussed.  
        关键词：Proton induced X-ray emission (PKE);Ancient glass;PbO-BaO-SiO2 system glass;Yangzhou city   
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        发布时间：2021-03-12
      • WANG Shiheng LIU Shengkang
        Issue 12, (2003)
        摘要：An experimental study on the detection of grease stain in 074 mm petroleum pipelines in Karamay Oil-field of Xinjiang was carried out by y ray transmission method. The response curve of grease stain thickness in the pipeline was measured to be In(N0 / N) = 0.00392d - 0.00677. We have also investigated the effect of thermal insulating layer. The experimental setup consists of a 137Cs γ radioactive source and a NaI (Tl) scintillation detector. Experimental results indicate that the thickness response of grease stain is sensitive and the thermal insulating layer has no too much effect on the obtained results.  
        关键词：γ ray transmission method;Petroleum pipeline;Grease stain thickness;Thermal insulating layer   
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        发布时间：2021-03-12
      • SUN Youmei ZHU Zhiyong LI Changlin
        Issue 12, (2003)
        摘要：The surface modification of polyimide films was carried out by 3MeV Si+ implantation under vacuum at room temperature and ions fluence ranging from 1 × 1012 to 1 × 1015 cm-2. The chemical degradation of function groups and the mechanism of the structure translation in the irradiated layer were investigated by Fourier Transform Infrared (FTIR), Ultraviolet/Visible (UV/Vis) spectroscopes and electrical behavior measurement. FTIR results show that the absorbance of typical function group decreases exponentially as a function of fluence. The damage cross section of typical bonds of PI was evaluated from the FTIR spectra. Irradiation dramatically enhances the electrical conductivity, and the sheet resistance in our experiment descends nearly 10 orders of magnitude compared with its intrinsic value. The red shifting of the absorption edge from UV to visible reveals the reduction of band gap which results from the increase of the cluster size.  
        关键词：Ion irradiation;Polyimide;Structure transition;Electrical property   
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        发布时间：2021-03-12
      • LIANG Tongxiang TANG Chunhe
        Issue 12, (2003)
        摘要：Partitioning and transmutation of long-lived nuclides have profound benefits for economic development, global political stability and the environment. This technology would reduce nuclear waste disposal requirements, prevent proliferation and eliminate a major hurdle to the development of nuclear power. This paper reviews the advanced fuel cycle process and development of ATW in the world, and some suggestions about the R&D of nuclear power in China are proposed.  
        关键词：Nuclear fuel cycle;Transmutation;Spallation neutron source(SNS)   
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        发布时间：2021-03-12
      • ZHANG Ping LIANG Junfu XIN Renxuan SONG Chongli
        Issue 12, (2003)
        摘要：Radiation stability of extractants containing phosphorus used in nuclear reprocessing has been widely investigated. Studies on the radiation stability of tributyl phosphate (TBP), octyl-phenyl-N,N’-diisobutylcalbamoy-Imethylphosphine oxide (CMPO), di(2-ethylhexyl) phosphorous acid(DEHPA), and trialkylphosphine oxide(TRPO), were reviewed. The radiolytic products of CMPO, DEHPA and TRPO, the effects of radiation on extraction and retention, and cleaning methods of irradiated solvents were introduced.  
          
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        发布时间：2021-03-12
      • LI Mingfei BAI Jinchang JIANG Xiaomei
        Issue 12, (2003)
        摘要：Charge-deposited densities of column-type self-powered detectors irradiated by γ-ray are measured and some experimental results are given. Some characteristics of column-type self-powered detectors are discussed.  
        关键词：Column-type detectors;γ-ray;Charge deposition   
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        发布时间：2021-03-12
      • WANG Jianlong
        Issue 12, (2003)
        摘要：The removal of Cs from industrial waste effluents prior to discharge is necessary. Caesium is one of the radio-contaminants discharged from nuclear power plants. Current technologies for Cs removal, such as zeolite adsorption, ion-exchange method, are expensive. Microbial technology may present a cheap alternative. The distinct chemical properties of Cs indicate that the interaction mechanism of caesium-microorganism is different from that of other metals/radionuclides. It has been reported that a number of microorganisms can uptake caesium. However, uptake levels vary markedly in different organisms and are strongly influenced by a number of factors, such as the operational mode (batch or continuous- flow systems), biomass immobilization, pH, and particularly the presence of other monovalent cations, such as K+ and Na+. The differences in Cs+ uptake capacities of different microorganisms appear to be attributable to differences in the affinity of monovalent cation transport systems for Cs +. By means of modern biotechnological methods, microorganisms with particularly high affinity for Cs + can be isolated. Moreover, manipulation of physiological states of microorganisms can also change the affinity for Cs + . Removal of caesium by biotechnological methods has potential application in bioremediation of radionuclides-contaminated environment.  
        关键词：Microorganism;Radionuclides;Caesium;Bioremediation;Biotechnology   
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        发布时间：2021-03-12
      • JIANG Zuozhong BAIXinde LING Yunhan LIN Wei XIE Zhipeng MA Wenjun REN Yonggang
        Issue 12, (2003)
        摘要：Gamma lithium aluminate, γ-LiAlO2, is a potential candidate for MCFC matrix and tritium breeding material. Lithium aluminate pellets and pipes with thin walls were sintered with 2.45 GHz microwave applicator. It was shown that lithium aluminate ceramic was suitable to heating with microwave energy and to using lower sintering temperature and short heating time compared with conventional method. And above all special requirements on the material properties, such as ultimate compressive strength (C.S.), narrow porosity distribution and homogeneous grain size were achieved. This provides a bright future for fast and high quality sintering of lithium aluminate.  
        关键词：Lithium aluminate;Microwave sintering;MCFC   
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        发布时间：2021-03-12
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