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      • Renyuan Hu
        Vol. 09, Issue 3, (1986)
        关键词：Ion implantation;Ion mixing;physic-metallurgy;Ion irradiation   
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        发布时间：2022-08-16
      • Zongying Tao,Weinan Zhou
        Vol. 09, Issue 3, (1986)
        摘要：In this paper we prove that the optimization objective function Smin in data fitting of Mössbauer spectrum is not to be distributed as the χ2 distribution, therefore it can not be taken as the criterion of the goodness of fitting  
        关键词：Mössbauer spectrum;data fitting chi-square testing;Least square method   
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        发布时间：2022-08-16
      • Zhongming Liu,Shilin Xing,Zhongmin Wang
        Vol. 09, Issue 3, (1986)
        摘要：A simple neutron-gamma discriminating system is described. A detector and a pulse shape discriminator are suitable for the neutron-gamma discriminating system. The influence of the constant fraction discriminator threshold energy on the neutron-gamma resolution properties is shown. The neutron-gamma timing distributions from an 241Am-Be source, 2.5MeV neutron beam and 14MeV neutron beam are presented.  
        关键词：neutron-gamma discriminating system;resolution property;timing distribution   
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        发布时间：2022-08-16
      • Shixin Xu,Hefeng Yang,Qingkang Shen,Huimin Wang
        Vol. 09, Issue 3, (1986)
        摘要：This paper is a brief summary of the coloration of quartz samples from different places of China by 60Co-γ irradiation. The test was carried out in recent 3 years. The results show that after radiation, natural colorless quartz may convert its color to smoky even to black without any change of its crystal structure as well as its chemical composition. The coloration is quite stable under ordinary condition without any induced radioactivity.  
        关键词：color variation of the quartz after radiation;stability test;test for physical and chemical properties   
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        发布时间：2022-08-16
      • Dexin Cao,Congxin Ren,Jie Yang,Zuyao Zhou,Wei Zhou,Shichang Zou
        Vol. 09, Issue 3, (1986)
        摘要：This paper reported the study on the surface damage, and its annealing of R-IBЕ(reaction ion beam etched) crystal by RBS-channeling technique. The topography of the etched surface was observed by SEM.The experimental results show that the reactive ion beam etching with CF4 results in a surface damage layer and the amount of the damage increases with increasing the energy of the ion beam.  
        关键词：reaction ion beam etching;Damage;Thermal annealing;channeling technique   
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        <引用本文> <批量引用> 28328759 false
        发布时间：2022-08-16
      • Chengde Shen,Mantao Jiang
        Vol. 09, Issue 3, (1986)
        摘要：A gas proportional counter with a ring anticoincidence shield has been designed in this laboratory. The effective volume of the counter is 1.0 litre with background 10 cpm and efficiency more than 90%. The proportional counter is designed to withhold pressures up to 3 ATM at STP and the future design modifications will ensure that a pressure is expected to be within 4—6 ATM. The voltage plateau, using pure C2H2, extends over a range of 600V with a slope of 1%/100V.  
        关键词：14C dating;the proportional counter with ring anticoincidence shield   
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        <引用本文> <批量引用> 28328760 false
        发布时间：2022-08-16
      • Jiachi Xu,Dehong Zhang,Xiaolin Xu,Jiaying Wang,Xiangti Meng
        Vol. 09, Issue 3, (1986)
        摘要：The principle, technology and characteristic of the neutron transmutation doping of GaAs are presented in this paper. The preliminary experimental result is given.  
        关键词：gallium arsenide;Transmutation;Doping;mobility;compensation ratio   
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        <引用本文> <批量引用> 28328836 false
        发布时间：2022-08-16
      • Weipeng Xu,Mingyao Li
        Vol. 09, Issue 3, (1986)
        摘要：Basic principle, numeral treatment and computation of electric and magnetic field for beam — optical units are briefly described in this paper.  
        关键词：boundary element method;Electromagnetic field;Accelerator   
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        发布时间：2022-08-16
      • Yunmin Sun,Mingzhu Shao
        Vol. 09, Issue 3, (1986)
        摘要：This paper describes an experiment about the effect of the thickness of stripping carbon foils on the charge state distribution of carbon and neon which are extracted from 1.5m classical cyclotron. The energies of the particles are 72 MeV and 140 MeV respectively. The results show that the thicker foils were used, the more number of the high charge state particles were obtained after stripping.  
        关键词：thickness of carbon stripping foil;charge state distribution   
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        发布时间：2022-08-16
      • Sujing Pan,Yuying Gao
        Vol. 09, Issue 3, (1986)
        摘要：The article describes the determination of forteen rare earth elements in the apatite by neutron activation analysis. The method is rapid, and sensitive and can determine several elements simultaneously. The radiochemical separation is adopted in our work. The chemical recovery is over 95%.  
        关键词：Neutron activation analysis;radiochemical separation;rare earth element   
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        发布时间：2022-08-16
      • Yin Sha,Pingsheng Liu,Runhua Zhang,Zhenxin Zhang,Yinkun Feng,Guodong Liu,Guiqin Sun,Shizhen Wang
        Vol. 09, Issue 3, (1986)
        摘要：The PIXE technique was used to analyse the elemental composition of human hair. The PIXE experimental facility used in the Institute of High Energy Physics was described. The methods of sample preparation and elemental quantitative analysis were introduced in detail. The accepted intercomparison material for trace element studies from human hair was analysed and the results were in good agreement with those by other well established traditional methods. The hair from patients with hepatolenticular degeneration(Wilson's disease) was also analysed and compared with that from normal persons. The apparent abnormality of calcium and copper contents in the patient's hair were not observed.  
        关键词：PIXE;Human hair;Wilson's disease   
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        <引用本文> <批量引用> 28328877 false
        发布时间：2022-08-16
      • Yuanfu Xia,Zhiqian Chen,Shuxin Wang,Rongchuan Liu
        Vol. 09, Issue 3, (1986)
        摘要：The Fe-57 Mössbauer effect was used for analyzing the green-stains on the barks of plane-trees. It can be successfully used for determining the degree of the iron pollution and obtaining some information on the microstructure of the pollutants. It was also possible to apply the effect in the investigations of iron concentration variations due to nuclear explosions made in the atmosphere.  
        关键词：57Fe;iron pollution;Mossbauer spectroscopy   
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        <引用本文> <批量引用> 28328878 false
        发布时间：2022-08-16
      • Xianfang Wen,Dongyang Li,Xizhong Zhang,Yizhu Chen
        Vol. 09, Issue 3, (1986)
        摘要：This paper describes the application of urea plus ordinary superphospate (OSP)which gave higher grains yield than by application of compound fertilizer UPA (urea plus compound ammonium phosphates). Isotopes tracer experiment showed that the utilization of nitrogen fertilizer are: mixed urea and OSP>urea and OSP separately> urea>urea - ammonium phosphates. The utilization of phosphorus by rice are: urea - ammonium phosphate>mixed urea and OSP>urea and OSP separately>OSP. It is shown that the AN-value of soil was significantly correlated with yield of rice grains.  
        关键词：soil AN-value;plastic scintillation cup method   
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        <引用本文> <批量引用> 28328880 false
        发布时间：2022-08-16
      • Fude Fang,Jin Zuo,Guanyun Wu
        Vol. 09, Issue 3, (1986)
        摘要：Four kinds of 14C-aminoacyl-tRNA were preparated by means of enzymatic method. Specific activity of products prepared was 7476—132394 cрm per mg tRNA. It has been found that these products possess good biological activity in vitro.  
        关键词：14C-aminoacyl-tRNA;protein biosynthesis   
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        发布时间：2022-08-16
      • Liyi Lu,Zhenghao Liu,Zhigang Tang,Cheng Luo,Qunxia Duan,Jimin Zhang,Yanyan Zhang
        Vol. 09, Issue 3, (1986)
        摘要：The preparation methods for the labelled proteins and peptides, with the radionuclide 211At, are described.The 211At-labelled proteins and peptides, for example BSA, RbIgG and met-enkaphalin etc., are obtained by several radioastatonation labelling methods, such as solid phase enzymes, H2O2 and chloramine T etc., among which the second is the best.  
        关键词：astatine-211 solid phase enzymes;proteins;peptides   
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        <引用本文> <批量引用> 28328929 false
        发布时间：2022-08-16
      • Lianxiang Chen,Denren Xu,Yongnian Shen
        Vol. 09, Issue 3, (1986)
        摘要：This paper presents a new method in the diagnosis of metabolic bone disease. Using a shadow-shield whole-body counter, we have measured whole-body retention(WBR)of 99mTc-MDP as up to 24h. in normal and diseased in bone metabolism. This test may provide a sensitive method for detecting increasing bone turnover in adults and children.  
        关键词：whole body retention;Metabolic bone disease;the diagnosis of metabolic bone disease;bone turnover;whole-body counter   
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        发布时间：2022-08-16
      • Jianan Qian,Jixian Zhang,Shengguo Zhang,Ziqiang Weng,Weijia Tian,Maoran Pan,Chengmo Zhu,Qing Tao
        Vol. 09, Issue 3, (1986)
        摘要：Radionuclide angiography is a non-invasive detection of cardiac functions. This paper described five cases of patients using frequency-programed pacer. LVEF and ventricular wall motion were detected by radionuclide angiography in different frequency. It is helpful in choosing the frequency to meet the physiological requirements for improving the dynamic of blood flow. This method can also be served as a index of monitering cardiac function of pacer-using patients.  
        关键词：pacer radionuclide angiocardiography;rate programmable pacemaker;left veutricular ejection fraction;wall motion   
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        发布时间：2022-08-16
      • Shaoliang Chen,Huiyang Zhao,Xiaoming Yan
        Vol. 09, Issue 3, (1986)
        摘要：A derivative of N-pyridoxylamino acid-N-pyridoxyl-tryptophan (PHT) was synthesized by a new method and the Sn-PHT kit was prepared. The 99mTc-complex of this compound was prepared by stannous chloride reduction of sodium pertechnetate and heated for 10 minutes in a boiling water bath. 99mTc-PHT was excreted into the bile and we can obtain better hepatobiliary image. We also discussed the drawback of this agent.  
        关键词：hepatobiliary image;hepatobiliary radiopharmaceutics;99mTc;99mTc-PHT   
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        发布时间：2022-08-16
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