最新刊期
      卷 0 ， 期 0 ， 2020
      • Fude Li,Zhiyong Qiang,Guolun Deng,Youyu Zhang,Defu Chen
        Vol. 05, Issue 3, (1982)
        摘要：This paper reports a method for monitoring of 14C in the atmospheric and biological samples. The method involves preparation of carbon dioxide produced from the samples. Acetylene is produced from carbon dioxide sample by lithium carbide formation. A silica-alumina catalyst activated by chromic anhydride employed for the conversion of acetylene to benzene is used. The yield of benzene is about 80% and its purity checked by gas chromatography analysis is better than chromatographic grade benzene. The method is convenient, quick and accurate for monitoring of 14C in environmental samples.  
          
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        发布时间：2022-08-16
      • Faxian Chen,Junru Bao,Qing Shao
        Vol. 05, Issue 3, (1982)
        摘要：This paper described a method in which 3H and 32P, 3H and 14C dual labelled samples were counted by a Beckman LS 8100 or an NE 8312 liquid scintillation spectrometer. An equation for calculating dpm of dual labelled samples was derived from the relation between the counting efficiency of dual labelled samples in different counting channels of a spectrometer and the H-number or external channel ratio value R. The data were processed by a Wang 600 calculator. The result shows that a satisfactory result can be obtained by using this method for measurement and calculation of dual labelled samples.  
          
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        发布时间：2022-08-16
      • Zhifen Chen
        Vol. 05, Issue 3, (1982)
        摘要：The balanced radiator assembly is an efficient means by which the effects of matrix and neighbouring elements can be overcome in radioisotope X-ray fluorescence analysis technique. A special analysis assembly which is used for determinating an element in samples bontaining high concentration of another element with slightly lower atomic number is described. The principle and construction of this assembly and the results of copper content determination in copper concentrates at some mines are given. Samples analyzed with relative error ≤4% account for 98% of total samples.  
          
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        发布时间：2022-08-16
      • Jintian Zhang,Jilian Tan,Yuzhao Zhang,Jiajun Yan
        Vol. 05, Issue 3, (1982)
        摘要：A helical cathode proportional chamber for the end counter of two dimensional drift chambers is described. The sensitive volume is 1,2×1.2×10cm3. The energy loss ΔE resolution of 12.1% and space resolution of 1.2mm (FWHM) were obtained for 5.3 MeV α-particles (ΔE~1MeV) with 90% argon and 10% CH4 mixture at a pressure of 730 torr.  
          
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        发布时间：2022-08-16
      • Weiquan Lai,Senlin Xu
        Vol. 05, Issue 3, (1982)
        摘要：This paper describes the optical properties of 90° deflecting magnets, with emphasis on the advantages of the symmetric double-focusing magnets, such as higher energy resolution, greater beam acceptance and equal entrance and exit angles. In this paper these advantages are demonstrated by means of imaging optical method, and beam optical digital calculations of first order. Some of characteristic curves are given for reference.  
          
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        发布时间：2022-08-16
      • Mingguang Bi
        Vol. 05, Issue 3, (1982)
        摘要：This paper describes the manufacture technology of the mineral (MgO)-insulated hollow cable. This cable is used to fabricate the trim-coil and valley coil for adjusting the magnetic field in a cyclotron. The key problem of eliminating the short circuit between the inner and the outer tubes and the properties of the cable are discussed in detail.  
          
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        发布时间：2022-08-16
      • Guolin Wang,Sikang Wang
        Vol. 05, Issue 3, (1982)
        摘要：A low background beta measuring instrument is described here. This instrument consists of a 20mm Au-Si surface barrier semiconductor detector and an anticoincidence scintillation counter with a plastic scintillator and a lead chamber with a wall 8cm thick which is used as a shield.Under these conditions the background is equal to 0.12±0.04 cpm. The detection efficiency is about 48% for 90Sr-90Y.  
          
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        发布时间：2022-08-16
      • Xielong Yang,Yuanji Gu,Jianmin Zhao
        Vol. 05, Issue 3, (1982)
        摘要：Introduced in this article is a constant velocity Mössbauer spectrometer, which has a laser-velocity-measuring-system for calibrating absolute velocity. It adopts a special reference singnal waveform to reduce the disturbances of the fast flyback, and the designs of the spring and the drive-power-amplifier circuit were improved. The stability of the spectrometer is better than 0.1% (24 h) with line width < 0.27mm/s(α-Fe, the third and fourth lines).  
          
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        发布时间：2022-08-16
      • Xueshi Chen,Shengmo Zhou,Yiping Zhang,Kuanzhong Xie
        Vol. 05, Issue 3, (1982)
        摘要：The possibility of measuring characteristic X-rays, emitted following IT or EC decay, for element analysis in 14 MeV neutron activation was investigated. The mass sensitivity was evaluated to 0.1~1 mg for most elements. X-ray spectra from Rh, Ag, Cd and In were observed clearly. This technique is particularly advantageous for those nuclides of which the IT or EC ratio is large and for those samples of which the matrix consists of light elements and which contain a considerable number of intermediate or heavy element to be detected.  
          
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        发布时间：2022-08-16
      • Hongjin Pan,Haochang Pan,Jinlong Xu,Kuanzhong Xie
        Vol. 05, Issue 3, (1982)
        摘要：Some experimental apparatus and equipments for semi-automatic fast neutron activation analysis are described briefly. Since 1976 they have been used in the analysis of short-lived radionuclides, particularly in the activation analysis of oxygen. The stability of this system is quite satisfactory.  
          
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        发布时间：2022-08-16
      • Guohui Hu,Honghai Zhong,Yuyuan Ling
        Vol. 05, Issue 3, (1982)
        摘要：This article described the principle of the method, measuring program, experiment and equipments of analysis of the elements O and Si in mineral by 14 MeV neutront activation. The results of measurement were compared with those of chemical analysis. It shows that the method is a quick, accurate and non-destructive one for the elements O and Si in mineral.  
          
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        发布时间：2022-08-16
      • Group of Nuclear Reaction Analysis, Shanghai Institute of Nuclear Research, Academia Sinica,Radioactive Ray Application Laboratory, Shanghai Scientific and Technical University
        Vol. 05, Issue 3, (1982)
        摘要：This paper introduces the method, principle and instruments to measure the fluorine concentration in tea using the 19F (p, α γ) 16O prompt nuclear reaction analysis The results are 81±12 ppm in the green tea of Zhejiang Province and 56±9ppm in the black tea of Anhui Province respectively.  
          
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        发布时间：2022-08-16
      • Guoshun Zhuang,Adi He,Jingjuan Tang,Zuzhan Yu,Zhibing Zhang
        Vol. 05, Issue 3, (1982)
        摘要：The main complex ions in the system of AgNO3-NH3-pyridinemonocarboxylic acid have been investigated by radiotracer paper electrophoresis method. The results show that radiotracer paper electrophoresis method is more intuitive and sensitive to identify the forms of discharging ions.  
          
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        发布时间：2022-08-16
      • Hongxiang Liu
        Vol. 05, Issue 3, (1982)
        摘要：During the past three decades many fluoro-glass readers have been developed to increase the sensitivity and reproducibility of the measuring devices. However almost all of them are of special design which can not be used in other areas except glass dosimetry. In our dosimetry systems we have utilized commercially available fluorescence spectrophometers (Hitachi Model 650-60 and Shimadzu QR-50). During one year of use they have provided a realiable and accurate dosimetric tool which afforts cumulative dose range of 10-5~102Gy (10-2Gy=1 rad).  
          
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        发布时间：2022-08-16
      • Yaozhang Huang,Yongxin Wang
        Vol. 05, Issue 3, (1982)
        摘要：The distribution of 99mTc-gluconate, 203Hg-chlomerodrin, 99mTc-DMSA, 113mIn-DMSA and 169Yb-DTPA in rat kidneys was studied by autoradiography. The experimental results shaw that the above-mentioned five radiopharmaceuticals could be accumulated and distributed in renal cortex. The 169Yb-DTPA were retained in the kidney in a short time and excreted rapidly, while the 203Hg-chlomerodrin remained longer and discharged slowly, accumulated from the outer cortex to the inner part. The 99mTc-DMSA and 113mIn-DMSA lied between the 169Yb-DTPA and 203Hg-Chlomerodrin.  
          
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        发布时间：2022-08-16
      • Limin Zhang,Qi Chen,Qingwu Mao,Yanping Zhu
        Vol. 05, Issue 3, (1982)
        摘要：α-Bungarotoxin labelled with 125I was obtained by chloramine-T method. It was purified by the use of sephadex G-25 chromatography. The results were as the following: specific activity 90~100Ci/mmol, labelling rate 50%, protein recover 65% and free iodine content less than 3%. The biological experiment showed that the structure and the activity of 125I-α-Bungarotoxin have no significant change.  
          
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        发布时间：2022-08-16
      • Lianghua Ye,Zhoulei Mei,Yundi Yang
        Vol. 05, Issue 3, (1982)
        摘要：Copolymers of grafting styrene with polyvinylidene fluoride (VF2) films were prepared in air by preirradiation techniques.The effects of dose, temperature, thickness, reaction time and plasticizer on grafting of films were investigated.Structure of graft copolymers was examined by solvent reaction, swelling and infrared methods.  
          
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        发布时间：2022-08-16
      • Qixiang Xiang,Weizong Min,Zhiyong Ni,Hongying Yuan
        Vol. 05, Issue 3, (1982)
        摘要：In this paper the adsorbing properties of the basic magnesium carbonate for the Th in sea water and a spectrophotometric method are described. For Th concentration of 10-6~10-8g/l the recovery is greater than 95%. The precision of the method, expressed by the standard error, is ≤ 14%. The lowest limit of the determination of Th has reached 5.0×10-8g/l, and the coexisting ions in sea water don't interfere the determination and recovery of Th.  
          
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        发布时间：2022-08-16
      • Nianbao Zhang,Rusong Wang
        Vol. 05, Issue 3, (1982)
        摘要：Deuterium or tritium-labelled 5-hydroxytryptamine creatinine sulphate was prepared by heating 5-hydroxytryptamine creatinine sulphate with deuterium or tritium gas in 4N HC1 and 5% PdO/BaSO4 catalyst with an overall yield of 10~19%.The mass spectrum data showed that with about 76% of deuterium was incorporated to 5-hydroxyptamine.The specific radioactivity of the tritiated compound was 25.3Ci/mM, with a radiochemical purity of more than 93%.  
          
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        发布时间：2022-08-16
      • Fasheng Fan,Zentang Zhou,Dequn Shen,Yun Wang,Yifang Ye,Qixun Sun,Yongchuan Wang,Qianmei Ji,Jiong Zhang,Yongjian Li
        Vol. 05, Issue 3, (1982)
        摘要：123I-hippuran was synthesized from home-made Na 123I and othoiodohippuric acid(OIH) by fusion at 180℃ within 3 minutes. It gave yields of > 90% with > 98% of radiochemical purity. The mice distributions and renal γ-camera imagings of rabbit and dog with 123I-OIH thus obtained shew it to be promise in clinical application.  
          
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        发布时间：2022-08-16
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