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      • Yuanlu He,Yuhua Wang
        Vol. 10, Issue 2, (1987)
        关键词：cellulose containing raw materials;radiolytic hydrolysis;cellulose lignin;polysaccharide   
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        发布时间：2022-08-16
      • Zengxue Jiang,Shaoyu Yang,Shizhuo Hao,Baifang Yang,Miangong Shi,Jingwei Miao
        Vol. 10, Issue 2, (1987)
        摘要：The design of a high resolution (∆E/Е<±1.9×10-4) electrostatic analyzer with a mean radius of 800mm is described. Its characteristic of structure, performance, installation, preliminary tests and application in the atomic collision study are discussed. An on-line control system of the electrostatic analyzer using an apple II+ microcomputer based voltage will be introduced briefly.  
        关键词：electrostatic analyzer;High resolution   
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        发布时间：2022-08-16
      • Zhongyan Guo,Weimin Qiao,Wenqing Shen,Yongtai Zhu
        Vol. 10, Issue 2, (1987)
        摘要：The program is designed for processing the multi-parameter experimental data acquired by the large area position sensitive ionization chamber in nuclear reactions. The program was written in Fortran Ⅳ-plus language on the DEC's PDP-11/44 computer. The program was constructed in multi-step command mode, so it is easy and convenient for use. The model indepedence structure makes it easy to be reasembled according to various need.  
        关键词：large area two-dimensional position sensitive ionization chamber;Fortran Ⅳ-plus language;data analysis program   
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        发布时间：2022-08-16
      • Xinlu Deng,Shilun Guo,Wu Meng,Shegfen Sun,Pengfa Zhang,Xiuhong Hao
        Vol. 10, Issue 2, (1987)
        摘要：A lot of samples will be measured when the fission track method is used for the uranium exploration. A higher measuring speed and accuracy can be achieved when the automatic measuring method described here is used. This paper presented some results obtained by using a texture analysing system (T. A. S.) for automatic measurement of the fission tracks of some samples in the field. The comparison was made between two results obtained by using the T. A. S. and the microscope.  
        关键词：uranium exploration;fission track method;microscope;texture analysing system;adjustment of the optical path   
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        发布时间：2022-08-16
      • Yuanxian Xia,Chengying Tao,Zhili Wu
        Vol. 10, Issue 2, (1987)
        摘要：In this paper the separation of uranium from thorium in 1B extractor for the acid thorex process was described. The operation of 1B extractor was carried out with 30%TBP-kerosene as scrubbing agent and dilute nitric acid as stripping agent at room temperature. The theoretical stages of the scrub section and strip section, the optimum conditions of the relative flow rates and acidity of the stripping agent were determined by means of batch-wise countercurrent extraction experiments. The decontamination factors for uranium and thorium was also determined, respectively. The separation coefficient of the uranium from thorium is more than 200, the recovery efficiency of the uranium is 99.8%.  
        关键词：232Th;233U;233Pa;Fission products;Extraction separation;TBP   
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        发布时间：2022-08-16
      • Borong Bao,Zhilun Xue,Yuandi Cheng
        Vol. 10, Issue 2, (1987)
        摘要：In the present work, a procedure for the determination of lead in soil samples by 203Pb radioisotope dilution, substoichiometric method is described.Japan NIES No.2 river clay standard sample and 83-40 Tibet soil standard sample were determined. Our values were in good agreement with reference values. The standard deviation of the method was less then 5%. Detection limit was about 0.1µg Pb.  
        关键词：203Pb isotope dilution substoichiometric method;soil samples;determination of lead   
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        发布时间：2022-08-16
      • Tonghe Zhang
        Vol. 10, Issue 2, (1987)
        摘要：The effects of ion sputtering was studied in ion implantation. These are: surface sputtering, profile correction of doping concentration and total amount of doping. Relations among these effects and energy, dose, ions and target atoms were analysed. The calculations showed that the amount of Sn implanted into Fe was saturated when Sn was implanted at 100keV in the dose of greater than 3×1016/cm2. The saturated amount of Sn in Fe is dependent on energy of Sn. For example, the saturated amount of dose is only 1.35×1016/cm2, when Sn is implanted at 5keV. But the amount of Sn reaches 5.6×1016/cm2 when Sn is implanted at 300keV. The amount is raised about four times.  
        关键词：implantation of high dose;ion sputtering;amount of sputtering;surface satuation concentration   
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        发布时间：2022-08-16
      • Chunyuan Yin
        Vol. 10, Issue 2, (1987)
        摘要：The multi-exponential function fitting program for analysis of the positron annihilation life spectrum /NFIXED/ is introduced and discussed in detail. This program was originally provided by Prof. Hsiao- Hua Hsu. In practice, it have been improved and have been run for many α-Fe spectra. The differences of the life time between our computations and references are less than 10ps. Obviously, the program is rather efficient.  
        关键词：positron annihilation life time spectrum;multi-exponential function;non-linear function;matrix;Life time;Intensity   
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        发布时间：2022-08-16
      • Chunhan Tong,Heguo Guan
        Vol. 10, Issue 2, (1987)
        摘要：The paper has made a general discussion about the conditions under which the ENAA will be valid and listed the respective analysis results at two different quantities.It is discussed that a proper quantity of the standard sample depends on the sensitivity of the method and the size of gold; and also under discusion is the interference to 411.8keV from 153Sm and 152Eu in the trace gold analysis. It was shown that 3—5%of influence was produced for the content less than 10ppb. ENAA is satisfying as compared with RNAA. The analysis result of gold in USGS-GXR-4 agrees with the recommanded value which suggests the analysis work with satisfying precision.  
        关键词：trace gold standard samples;Epithermal neutron activation analysis   
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        发布时间：2022-08-16
      • Yuanxiang Xie,Xiaoming Wang,Yongtai Zhu
        Vol. 10, Issue 2, (1987)
        摘要：The operation principle, construction and characteristics of the Bragg curve spectroscopy detector (BCS detector) are described in this paper.Our BCS detector with its field parallel to the particle trajectories was tested by 8.78MeV and 6.02MeV α particles from a ThC-ThC' source. The energy resolutions of 1.5% and 2.6% respectively for two group of α particles and the charge resolution of 2.7% were obtained. Further test experiments with heavy ions will be arranged.  
        关键词：Particle identification;Bragg curve;Bragg peak;Bragg curve spectroscopy detector   
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        发布时间：2022-08-16
      • Zhenlan Tao,Fuying Zhu,Gongqing Wang
        Vol. 10, Issue 2, (1987)
        摘要：By means of the high-resoluton Ge (Li) γ ray detector and on-line γ spectrum analysis and stacked foils technology, the excitation function for the reaction 27A1 (d, αp) 24Na was measured for deuteron energies from about 12 to 15.7MeV.  
        关键词：deuteron beam;A1 target;cross section σ(E)   
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        发布时间：2022-08-16
      • Lianzhong Chen,Yaqin Sha
        Vol. 10, Issue 2, (1987)
        摘要：This paper describes two mathematical statistic methods for testing the homogeneity of environmental soil sample, i. e. classical variance analysis and "degree of inhomo-geneity" method. The soil samples were analysed by instrumental neutron activation analysis (INAA). The elements determined were Th, La, Cr, Fe, Co. The result of "degree of inhomogeneity" method is discussed in comparison with classical variance analysis.  
        关键词：homogeneity test;INAA;soil standard sample   
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        发布时间：2022-08-16
      • Fenzhi Lin
        Vol. 10, Issue 2, (1987)
        摘要：The preparation, purification of 3H (2H) -selagine and distribution of tritium in the molecule are described. It was shown that the isotope exchange reaction between tritium and hydrogen in molecules could be performed at stated conditions. 3H-selagine was separated from dihydroselagine and tetrahydroselagine by silica-gel loaded paper chromatography. The radiochemical purity of 3H-selagine is over 99%. The specific activity is 3.37 Ci/mmol. Distribution of 3H in selagine is shown as following: 3,4-T—10.09%, 6,12-Т—36.70%, 8,10-Т—16.51%, methyl-T—36.70%.  
        关键词：selagine;Tritium;labelled;silica-gel loaded paper chromatography   
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        发布时间：2022-08-16
      • Shuyu Wang
        Vol. 10, Issue 2, (1987)
        摘要：Compound beef extract agar medium with 14C of specific radioactivity of 10µCi/ml to label xanthomonas oryzae bacterium by culture.Using sample concentrated filter paper-liquidscientillation method to determine the sample bacterium. By the method of x2 tests, the stability the apparatus was determined. taking from 19 determinations of the back-ground and the sample, the 2σerror of the average value of 13 caounting data were duse to uncertain the existance of the tracer bacterium.  
        关键词：xanthomonas oryzae;14C tracer method   
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        发布时间：2022-08-16
      • Reiying Fang,Huiyang Zhao,Feng Qian,Wenguan Liu
        Vol. 10, Issue 2, (1987)
        摘要：Technetium-99m labelled urokinase (a kind of embolus imaging agent) has been successfully applied to the clinical work in our department. Apart from the biological activity, this paper reported two methods for the measurement of the activity of the 99mTc-urokinase. One was air bubble method, another was fibrinous stereotyped method. Both of them appeared some advantages of a high-speed, simple, convenient, reliable and easy to practice.  
        关键词：activity measurement;99mTc-urokinase;fibrin   
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        发布时间：2022-08-16
      • Huacong Guo
        Vol. 10, Issue 2, (1987)
        关键词：analysis of light element depth profile;nuclear reaction method;proton elastic scattering method;front scattering coincidence method   
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        发布时间：2022-08-16
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