最新刊期
      卷 0 ， 期 0 ， 2020
      • Zhiyi Zhou,Miao Chen,Mingjuan Xu,Shaorong Zhang,Chunchang Sun
        Vol. 06, Issue 2, (1983)
        摘要：Duopigatron is a medium charge state heavy ion source. The principle, construction, test system and some experimental results are given in this paper. 1-5+ charge state Argon ions and 1-3+ Nitrogen ions can be observed in the ion mass spectrum.The effects of the magnetic field of the source, the gas pressure, the are voltage and extraction voltage on the ion current and their charge state are measured and discussed.  
          
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        发布时间：2022-09-13
      • Xiangqin Meng,Guijing Lin
        Vol. 06, Issue 2, (1983)
        摘要：The chambers here designed and manufactured are characterized by three terminals, gas flowing and extrapolated. Basic features and parameters were measured in Xray γ-ray and(n, γ) mixed field. The results of the experiments showed that the chambers can be applied to measure neutron absorbed dose in (n, γ) mixed field. It is also suitable for accurate determination of absorbed dose of thin layer sample.  
          
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        发布时间：2022-09-13
      • Heming Chen,Rongbao Tang,Guifang Zhang,Meilan Sha
        Vol. 06, Issue 2, (1983)
        摘要：Acrylic acid was grafted onto a 0.02~0.03mm thick polytetrafluoroethylene (PTFE)film by irradiation. The effect of monomer concentration, dose, dose rate and temperature on the grafting was investigated. The results suggested that the rate of graft polymerization increased with the monomer concentration. Specific electric resistance of the grafted film, dimensional changes, water absorption were dependent only on the grafted amount, but not on the irradiation conditions. The relationship between the specific electric resistance and the grafted amount of the grafted film was calculated by empiric formula: PG1.2696=2857 where, P is the specific electric resistance and G is the percentage of grafted amount. At a higher dose rate, the kinetic curves show a self-acceleration. At a lower dose rate, the kinetic curves tend to saturation, with no critical irradiation intensity.  
          
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        发布时间：2022-09-13
      • Quansheng Li,Huiyang Zhao
        Vol. 06, Issue 2, (1983)
        摘要：99mTc labeled human serum albumin (HSA) kit using stannous chloride (SnCl2) as a reductant, is usually not stable. The purpose of this research is to provide a stable and convenient equilibrium tracer for cardiovascular nuclear medical studies.This paper consists of titrating Sn(11) of storage solution; choosing chemical analysis methods and evaluating the labeling efficiency application of "Latin—square design" experiment to obtain the optimum labeling condition; the compositions of the kit-HSA 7mg, tartrate 1.08mg, SnCl2•2H2O 0.16mg, at pH3.5; and the test of the frozen kits (in five batches)showing labeling rate 95%, blood clearance rate-0.0026 (mean slope), effective shelf live 6 monthes.Conclusion: adopting indirect labeling technique (adding the chelating agent—tartrate)in stead of direct labeling, the stability of 99mTc-HSA kit increases significantly both in vitro and in vivo. The labeling rate of the kit can further increase when the amount of tartrate is much larger than that of SnCl2. Combining the use of the kit in the nuclear stethoscope to study left ventricular function has proved satisfactory.  
          
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        发布时间：2022-09-13
      • Jiarui Liu,Guiju Yu,Wanyin Liu,Duanwei Wang,Hanpeng Liu,Yinguan Sun,Shixuan Shang
        Vol. 06, Issue 2, (1983)
        摘要：When a monoenergetic (175keV, 1µA) beam of 12C+ ions passed through a 5~10µg/cm2 carbon foil, a beam-foil spectroscopic source of atomic and ionic carbon was produced in various stages of ionization and electr onic excitation. Spectra, radiative lifetimes and transition probabilities had been obtained by the beam-foil method for many excited terms in CII-CIII.  
          
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        发布时间：2022-09-13
      • Yunyu Wang,Jiayu Xue
        Vol. 06, Issue 2, (1983)
        摘要：We have checked the reliability in the data analysis of a positron lifetime spectrum, in which the least-square fit method was used, but have not taken the deconvolution procedure to consider the resolution function. We have also defined the best region to take the experimental points for analyzing the lifetime spectrum. In addition, as the intensity of each component was being calculated, the transfer of t0 to right was interpreted.  
          
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        发布时间：2022-09-13
      • Naitan You,Guijun Gu,Weisheng Shen
        Vol. 06, Issue 2, (1983)
        摘要：In this paper, the fabrication and performance of p-type ultra high purity silicon detectors are described. A 50mm2×1.73mm Si (HP) detector consists of a single crystal of p-type ultra high purity silicon supplied by Zhejiang University, and at 77 K, the resolution of the detector for 207Bi 1063.4keV K-electrons was 1.72keV.  
          
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        发布时间：2022-09-13
      • Bingde Huang,Qingcheng Zhang,Yanshu Han
        Vol. 06, Issue 2, (1983)
        摘要：Though some results can be obtained in searching the crevice water in bedrock by using an ordinary radio-active mine locator to make a survey of natural γ ray, yet the feeble γ abnormality, because of the low sensitivity of a mine locator, is very difficult to be discovered, The present apparatus "DTF-1" has a relatively high accuracy and sensitive reaction. Its principle and characteristics are described briefly and the applied effects in fields are also presented.  
          
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        发布时间：2022-09-13
      • Guantao Shen,Daihua Liang,Deyi Li,Muyao Zhou,Yongfa Zhang,Yitai Chen,Chuanshan Wang,Shuxin Zhou,Shengjun Zhang
        Vol. 06, Issue 2, (1983)
        摘要：This paper gives a brief account about the principle method, sample treatment and apparatus in the measurement of the fluorine concentration of environmental pollution by using the 19F (p,αγ) 16O prompt nuclear reaction. The results of the two groups of soil samples are given, which to a certain degree reflect the fluorine pollution around the steel works.  
          
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        发布时间：2022-09-13
      • Guoji Xu,Yuhua Zhao,Shengnan Zheng,Yongchang Xu
        Vol. 06, Issue 2, (1983)
        摘要：This paper describes the analysis of nuclear target impurity contaminated by substrate, crucible and remainder gases with the backscattring method. Some examples of anaylsis of target impurity are given. Both the advantages and the drawbacks of this method are mentioned.  
          
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        发布时间：2022-09-13
      • Shixiong Sun
        Vol. 06, Issue 2, (1983)
        摘要：This paper deals with theoretical and practical problems related to exploring hot water by γ-ray measurement method in karstified limestone areas of South Spring, Chongqing. It has been discovered that higher values are usually measured in the regions of hot-waterbearing structures, and lower γ values, in the regions of karstified cold-water-bearing strata. The factors that influence γ values and the significance of the derived conclusions to exploring the terrestrial hot energy and karst water are also discussed.  
          
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        发布时间：2022-09-13
      • Ying Yu,Xinnong Wan,Yuanyuan Li,Yuanhua Shen
        Vol. 06, Issue 2, (1983)
        摘要：The special self-suporting monocrystalline Au films with 500Å thickness were prepared by evaporating gold onto some monocryatslline Ag films in vaccum, and then separating the Au films by dissolving silver in diluted nitric acid. The optical transmittance of a light beam of films helped monitor the thickness and the rate of deposition during evaporation. The surface of films were examined by a scanning electron microscope (SEM). The monocry-stallinity of the films was excellent as measured by both X ray and electron diffraction methods. The normalized yield of the aligned spectrum measured by back-scattering method is 30% of that of the random direction.  
          
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        发布时间：2022-09-13
      • Fang Niu,Baobi Cheng
        Vol. 06, Issue 2, (1983)
        摘要：The conditions for preparation of MgO layers with electrophoresis are introduced. Taking acetone as medium, and Pt and Cu plates as electrodes, we found the optimum voltage(150 volts) and concentration of the suspension (10mg/ml). The maximum yield and the thickness of the layers obtained are 60 mg and 15 mg/cm2 respectively. The quality of the layers is rather satisfactory.  
          
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        发布时间：2022-09-13
      • Cifu Yan,Jiezheng Wu
        Vol. 06, Issue 2, (1983)
        摘要：In this paper the sublimate method of preparation of WO3 target is described. The thickness of target is up to 5mg/cm2 and the random tearing problem has been solved.  
          
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        发布时间：2022-09-13
      • Xinsheng Ma,Jialan Jin
        Vol. 06, Issue 2, (1983)
        摘要：The improvement made on our electrostatic accelerator to enhance its focusing performance with a single potential lens is described. Since the improvement, the size of the focus of the beam has become smaller. Besides, the figure of the focalizer and testing results are given.  
          
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        发布时间：2022-09-13
      • Bingjun Luo,Wenxiang Gao
        Vol. 06, Issue 2, (1983)
        摘要：The γ ray from 241Am source were used to excite silver target for producing characteristic K radiation. The collimated beam of K radiation is passed through the sample cell. The intensity of the unabsorbed radiation is measured with a NaI(T1) crystal. Near the absorption edges of molybdenum, its mass absorption coefficient is bigger, so the interference of some impurities in the solution is eliminated. The method gives very good accuracy (better than 1%). Twenty samples can be analyzed in about an hour.  
          
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        发布时间：2022-09-13
      • Zhili Wu,Xinwei Chen
        Vol. 06, Issue 2, (1983)
        摘要：We studied the effect of consitituent concentration, chemical purity, irradiation temperature, absorbed dose and dose rate on dose response of the ethanol-chlorobenzene dosimeter on 60Co-γ ray, and the dosimeter's stability before and after irradiation was also considered carefully. The G (C1-) values of 10 vol% chlorobenzene-4 vol% water system at different dose rate are given in this paper. The results show that such dosimeter is suitable, in an irradiation plant, for determination of ordinary dose within 103~105 Gy.  
          
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        发布时间：2022-09-13
      • Deren Wang,Chao Wu,Yonglu Chen,Meisheng Wu,Xingyuan Cao,Gentu Cao,Aming Zhang
        Vol. 06, Issue 2, (1983)
        摘要：In this paper the radiation vulcanization technology of medical silica rubber tube and the production line of 6t/year are described. Batch process can be achieved by using SYP device with homogeneous radiation and high efficiency. The results indicated that the product obtained by means of electron radiation is relatively pure, comparing with heat vulcanization both the energy consumption and cost are low.  
          
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        发布时间：2022-09-13
      • Jingfeng Chen,Xiuezhong Kou,Zhaohua Ge,Zhongquan Yie,Yuejing Zhang,Yue Yu
        Vol. 06, Issue 2, (1983)
        摘要：A simple and safe method is described to detect the radioactivity leakage from the stainless-steel shelled high-level cobalt-60 sources in water well. The source checked is placed in a small special sealable sampling can filled with water. After being kept a few days, the water in sampling can is pumped out and assayed. Since even a weak leakage from the source can result in a significant enhancement of activity concentration in sampling water, it makes the detection quite sensitive.  
          
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        发布时间：2022-09-13
      • Xichang Shi,Yongchuan Wang,Qianmei Ji,Defeng Xie,Qixun Sun
        Vol. 06, Issue 2, (1983)
        摘要：The time course of radio thallium-201, 200, 200 monochloride (Tl) uptake by washed human erythrocytes was studied in vitro. There was an initial rapid influx of Tl, which decreased with the time. The uptake of Tl is inhibited by ouabain and enhanced with the increase of concentration (10-9~10-5M). The uptake of Tl was greatly reduced with the presence of potassium in the suspending media. Our results indicate that transport of Tl through cell membrance of human erythrocyte may be related to Na+ K+-ATP dse.  
          
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        发布时间：2022-09-13
      • Chaoyi Wang
        Vol. 06, Issue 2, (1983)
        摘要：This paper introduces a method for determining 210Po in soil. We adopt concentrated nitric acid and 40% hydrofluoric acid to dissolve the sample. 210Po is electroplated spontaneously on the nickel disc and measured by α-counter. The total chemical yield is 83.7± 0.7%.  
          
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        发布时间：2022-09-13
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