最新刊期
      卷 0 ， 期 0 ， 2020
      • LU Qipeng TANG Yuguo XUE Song ZHAO Zhenwu WANG Zhaolan XU Zhong WANG Liqiu
        Issue 9, (2003)
        摘要：Over the last few years, along with the developments of space science, astrophysics, controlled nuclear fusion, plasma physics and ultraviolet laser research, the need is urgent for the radiometric standards from the infrared, the visible and the near ultraviolet spectral ranges expanding to the ultraviolet, the vacuum ultraviolet and the soft X -ray spectral ranges. Not only can synchrotron radiation (SR) be used as spectral radiation standard source in the ultraviolet, the visible and the infrared spectral ranges, but also it can be used as primary source standard in the vacuum ultraviolet and the soft X-ray spectral ranges. SR can calibrate spectral radiation for various radiation sources and the detectors. The Spectral Radiation Standard and Metrology beam-lines and experimental stations in the NSRL Phase II Project are under construction that include two beam-lines and three experimental stations. This paper describes the dedicated facility for light source of primary standard and transfer standard in the UV and VUV spectral ranges from 110 to 400nm.  
        关键词：Synchrotron radiation;Radiometry;Source calibration   
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        发布时间：2021-03-12
      • ZHENG Lifang SHEN Guobao LU Chengmeng LIU Songqiang
        Issue 9, (2003)
        摘要：This paper describes a machine interlock and protection system used for accelerators. The system is composed of a VME front-end computer and an Allen-Bradley programmable logic controller PLC-5. The software is developed in the EPICS (Experimental physics and industrial control system) environment.  
        关键词：Control system;EPICS;PLC Interlock   
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        发布时间：2021-03-12
      • LIN Chenglu ZHANG Zhengxuan LIU Weili
        Issue 9, (2003)
        摘要：New progress relating to new structure of SOI including differential insulator layer and top semiconductor layer is described. The new structure devices of SOI and the application of SOI devices in irradiation area are reviewed. The new progress on R&D of SOI technology in our country is reported in detail. Meanwhile, the new progress of industrialized SOI material is introduced.  
        关键词：Silicon-on-insulator(SOI);Irradiation;Industrialized SOI material   
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        发布时间：2021-03-12
      • CHEN Ximeng WANG Qiang WU Cuie LIU Zhaoyuan YU Deyang QI Zhong YANG Zhihu LIU Huiping
        Issue 9, (2003)
        摘要：In this work, we report the count ratios R of neutralized atoms of final state to projectiles O in collision with He, Ne and Ar. The O- energy range is 4 - 19keV. The variation of R with the collision energy E was discussed.For the same collision energy in this experimental energy range, we found R(EO--Ar)> R(EO--He) > R(EO--Ne)  
        关键词：Collision;Cross-beam;Negative ions;Detachment   
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        发布时间：2021-03-12
      • XIAO Gang DENG Li ZHANG Benai ZHU Jianshi
        Issue 9, (2003)
        摘要：Based on the modified Synder geometry and the material data given by ICRU-46,we have calculated, using Monte Carlo method, the depth dose curves of the head phantom of BNCT. The calculation is performed using individual monoenergetic and monodirectional beams of 0.0253eV, 1keV, 2keV, 10keV, 100keV and 1MeV neutrons, and 0.2, 0.5, 1, 2, 5 and 10 MeV photons. And a generic epithermal neutron beam with 1% fast neutron (10keV -2MeV) contamination and 10% thermal neutron (ImeV - 0.5eV) contamination is also employed. The results show an agreement accordance with the relative reference, which verify our treatment programming software ofBNCT.  
        关键词：Depth-dose curve;Boron neutron capture therapy;Treatment programming   
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        发布时间：2021-03-12
      • PANG Jufeng TIANYajuan WU Jie
        Issue 9, (2003)
        摘要：A software package of the Monte Carlo method simulating neutron-gamma-ray energy spectra was developed, which was used for the computation of neutron-gamma-ray energy spectra at the measurement points outside the oil pipeline with an 241Am-Be neutron source. Results showed the method to be a success.  
        关键词：Monte Carlo simulation;Produced liquid;Oil- to- liquid ratio;Oil pipeline   
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        发布时间：2021-03-12
      • SONG Wenjie
        Issue 9, (2003)
        摘要：This paper described the measuring results on total a and p activities for various soil, plant and water samples in environment, neutron and γ radiation level, and the personal dose around the Heavy Ion Research Facility in Lanzhou (HIRFL) after it went into operation. The preliminary evaluation has been given. Monitoring results show that operation of the facility is safe because no any environmental contamination has been found.  
        关键词：Heavy Ion Research Facility in Lanzhou;Environmental radiation;Safety evaluation   
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        发布时间：2021-03-12
      • LI Guangsheng PENG Zhaohua LI Darning CHEN Xilin YANG Yi BAO Jie YANG Zhihong ZHANG Shengdong CUI Anzhi
        Issue 9, (2003)
        摘要：Nuclide 155Eu was separated and purified from the 154Sm sample irradiated by the reactor neutrons by using the cation exchange technique. Activities were measured by the 4πβ-γcoincidence method and the γ-ray spectra of 155Eu decay were measured with a small-area planar Ge detector. Emission probabilities of the y-rays were precisely determined, with uncertainties of 1.7% and 4.5% for the strong and weaker y-rays, respectively. The present results have been considerably improved in comparison with previously reported values.  
        关键词：155Eu;Emission probability;4πβ-γcoincidence;Small-area planar Ge detector   
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        发布时间：2021-03-12
      • XU Xiangyi LAI Weiquan
        Issue 9, (2003)
        摘要：The composition and structure of the 800kV high voltage transmission system for a powerful electron accelerator are introduced. A numerical computation of electric field of the cable termination in SF6 insulating gas has been made, verifying that the design of electric field strength of the cable termination is reliable.  
        关键词：Powerful electron accelerator;Cable termination;Electric field strength;SF6 insulating gas;Potential gradient   
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        发布时间：2021-03-12
      • ZHAI Pengji ZHAO Yunlong LI Chunjiang WANG Baoyi
        Issue 9, (2003)
        摘要：Passive time-integrating 222Rn plastic monitors and SY-1 CR-39 were used for radon measurement. The effect of water-exposed-to-air during daily use of water (in the bathroom, toilet and kitchen) on indoor radon concentration was surveyed for some families situated in Zhongguancun, Beijing. It is shown that the unusual quantities of radon could be separated out and go into the surrounding air during normal use of water, and especially in winter the radon concentration near the tap in the kitchen is about twice as much as the other place and the concentration in the bathroom is 3-4 times higher than that in changing-rQom. A diffusion model was set up and the diffusion coefficients from water in the toilet, kitchen and bathroom were calculated to be 6.597×10-9, 5.934×10-9 and 3.560×10-9 m2/s, respectively.  
        关键词：CR-39 detector;Radon;Diffusion coefificient   
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        发布时间：2021-03-12
      • ZHANG Xun MA Lin CHEN Jiangfeng ZHANG Zhaofeng QIU Ping WANG Changsui
        Issue 9, (2003)
        摘要：Discrimination of the production sites of ancient pottery by using lead isotopic composition is discussed in this paper. We have determined the lead isotopic compositions of ancient pottery from the Jiahu and Xishan sites, Henan Province. Most of Jiahu pottery show 206Pb/204Pb of 18.0 to 18.4 and 208Pb/204Pb of 38.4 to 38.8, while most of Xishan pottery show 206Pb/204Pb of 18.6 to 18.8 and 208Pb/204Pb of 38.7 to 39.1. Therefore, the lead isotopes are useful in discriminating the production sites of the ancient pottery in some cases.  
        关键词：Ancient pottery;Lead isotopes;Jiahu;Xishan   
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        发布时间：2021-03-12
      • Erkin GUO Qi REN Diyuan YUXuefeng LUWu YANRongliang
        Issue 9, (2003)
        摘要：Radiation effects of a home-made type of GaAs/Ge solar cell have been discussed. The results indicate that the GaAs/Ge solar cell has higher efficiency and more radiation resistance than regular Si solar cell. In addition, the mechanism of radiation damage of the GaAs solar cell with AlxGa1-xAs window layer is different from that of Si solar cell.  
        关键词：Solar cell;Electron irradiation;Radiation damage;Spectral response   
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        发布时间：2021-03-12
      • KE Yan WU Yican YU Jinnan HUANG Qunying ZHENG Shanliang
        Issue 9, (2003)
        摘要：Low Aspect Ratio (LAR) Tokamak, as an excellent neutron source, was effectively applied in early stage of the fusion energy study. This paper offers a novel Liquid Metal (LM) blanketing Cu Center Conductor Post (CCP) design, instead of conventional CCP, for LAR Tokamak. It mainly comprises two parts: a shielding zone which can breed tritium with LM Pb83Li17 and protect Cu center conductor from radiation damage; and an electrical conducting zone which can load high electrical current (>10MA). By comparing it with the conventional CCP, its own merits are shown as follows: reducing radiation damage in the shielding zone, enhancing neutron utilization ratio and tritium breeding ratio, and retaining relative low electrical ohmic power loss with optimized structure of Cu conductor.  
        关键词：Tokamak;Low aspect ratio;Center conductor post;Liquid metal   
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        发布时间：2021-03-12
      • CUI Yu SUN Guoxin SHAO Hua HAN Jingtian BAO Borong
        Issue 9, (2003)
        摘要：The effect of diluents on the extraction of U(Ⅵ) with N,N-dibutyldodecanamide was further investigated using the result of IR spectroscopy and molecular mechanics. The causation for this effect was also discussed considering the structure of extractant and the extracted complex and the nature of interaction between the molecules of diluent and solute.  
        关键词：Diluent;Extraction;IR spectroscopy;Molecular mechanics   
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        发布时间：2021-03-12
      • LUO Xiaoqing CAO Zhengbai ZHU Liming
        Issue 9, (2003)
        摘要：The extraction of U(Ⅵ) and Th(Ⅳ) from nitric acid media by disulfoxides RSO(CH2)OR(n=4, 6; R=CH3(CH2)2CH2-, CH3CH(CH3)CH2CH2-, CH3(CH2)3CH(C2H5)CH2-) was studied. The extraction laws for U(Ⅵ) and Th(Ⅳ) by disulfoxides are similar to that by tributylphosphate(TBP),but their extracting and separating ability is superior to that of TBP. The relations between the structure of disulfoxides and their extracting and separating ability are briefly discussed.  
        关键词：Disulfoxides;Tributylphosphate;Extracting;Uranium;Thorium   
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        发布时间：2021-03-12
      • WANG Peilu LIU Zhongyang LIAO Xiaodong ZHENG Sixiao SUN Guanqing WANG Changxiang CHEN Zhiqing
        Issue 9, (2003)
        摘要：A thin calcium sodium hydroxypolyphosphate film on titanium alloy substrate was deposited by an argon ion beam with 60keV energy. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIRS) and X-ray photoelectron spectroscopy (XPS) were used to characterize the as-deposited film. These analyses revealed that the as-deposited film was amorphous or no apparent crystallinity and each other diffusion between film and substrate was quite obvious. Contaminations from carbon and oxygen appeared during the deposition process. At the same time, a CO32- group was introduced into the as-deposited film. Ca-P ratio in the film was decreased with the increase of the assisting ion dose and the dissolubility resistance in the salt solution was increased with the increase of the assisting dose. In the experiment, we observed also that the electrochemical properties of the films in the Hanks solution exhibited an obvious difference before and after annealing. The film presented a high passivity all the time before the annealing, a polarization current expressing dissolubility increased only from 1 μA to 2μA when an electrode potential went up from 0 to 1500mV, while after annealing in an argon atmosphere at 600℃, polarization current was quite small (<0.5μA), the dissolubility resistance was obviously superior to the former when the electrode potential ≤ 200mV. Its dissolubility was almost the same as that before annealing, however, when the potential was between 400mV and 800mV. When the electrode potential >800mV, the electrochemical properties became quickly poor and the polarization current was rapidly increased.  
        关键词：Calcium sodium hydroxypolyphosphate;Ion beam assisted deposition;Dissolubility;Electrochemic behaviour   
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        发布时间：2021-03-12
      • WUDazhen GE Xuewu ZHANG Zhicheng CHANG Zhenqi
        Issue 9, (2003)
        摘要：Polymerization of styrene (St) and n-butyl methacrylate (BMA) was induced by 60Co 7 ray radiation in the presence of dithiobenzoic acid. The structure, molecular weight and polydispersity of the polymers were characterized by ’H NMR and GPC. The results exhibit characters of the living polymerization: narrow molecular weight polydispersity, molecular weight linearly increasing with conversion, and the living end group being retained in the polymeric products. Polymerization mechanism was also discussed.  
        关键词：Dithiobenzoic acid;Radiation polymerization;Living radical polymerization;Reversible addi- tion-fragmentation chain transfer reaction   
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        发布时间：2021-03-12
      • WU Shengwei GUO Jinxue LI Yulan HUANG Xuan LI Wenxin
        Issue 9, (2003)
        摘要：Opened carbon nanotubes (CNTs) were immersed in radioactive (125I)NaI and (110Agm)AgNO3 solutions, and then washing and elution were carried out. Observation with high-resolution electron microscopy (HREM) and X-ray energy dispersive spectrometry (EDS) revealed that the soluble inorganic salt could be filled into CNTs by using the simple method described in this paper. The results indicate that radioactive tracing is an effective technique to study the filling and release behaviors of of CNTs.  
        关键词：Carbon nanotubes;Filling;(125I)NaI;(110Agm)AgNO3   
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        发布时间：2021-03-12
      • TANG Lijun LU Songlin
        Issue 9, (2003)
        摘要：A variety of magnetic cores were examined. It shows that the super microcrystalline iron core with high Br/Bs is more suitable to make a zero-flux sensor head, as high sensibility and great stability can be achieved for the zero-flux sensor made with this magnetic material. In addition, the ferrite core with high permeability seems to be another acceptable material to make a zero-flux sensor head.  
        关键词：Zero-flux sensor;Super microcrystalline;Magnetic core material   
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        发布时间：2021-03-12
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