最新刊期
      卷 0 ， 期 0 ， 2020
      • Zhu Xikai
        Issue 2, (1992)
        摘要：NEWOPTIC is a universal beam optics program running on personal computers. Its basic functions are described and its application in AMS is introduced. Some tricks and experiences about using this program are also involved.  
          
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        发布时间：2021-04-09
      • Jin Sizhao Chen Jinbo Huang Peihua
        Issue 2, (1992)
        摘要：The accumulated doses of samples are calculated by nonlinear fitting of the ESR dose response curves. The method of calculating AD’s uncertainty has been improved on the basis of Grun’s work. The problems and limitations for the linear fitting usually used are analyzed and the requirements for data in the non-linear fitting are discussed. The uncertainty of ESR ages of the first skull of Peking-Man and deposit at Zhoukoudian （Loc.l） is given.  
          
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        发布时间：2021-04-09
      • Wu Heyu Dai Guangxi Cai Wei
        Issue 2, (1992)
        摘要：The Monte Carlo method is used to simulate ternary fission process. The geometrical factor governing the relation between energy and track detection efficiency in forward 2π geometry for the mass symmetric ternary fission and symmetric fission of hot compound for the reaction systems of （16O+197Au） and （16O + 209Bi） have been calculated. The relation between the counts of 3- and 2- tracks detected by SSNTD and the probability ratio for spatial ternary to binary fission is presented.  
          
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        发布时间：2021-04-09
      • Zhang Guilin Xu Feng Liu Wenhong Hu Wenxiang Yu Fanghua Zhang Yiping
        Issue 2, (1992)
        摘要：The increase of martensitic transformation temperatures of TiNi shape-memory alloy after γ-irradiation is observed. X-ray diffraction, transmissin electron microscopy and positron annihilation parameters analysis have been used to understand its mechanism.  
          
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        发布时间：2021-04-09
      • Li Guisheng
        Issue 2, (1992)
        摘要：The neutron shielding for the high energy reaction of 337 MeV/u 20Ne ions on thick Cu target is calculated with the measured neutron spectrum. Both results of concrete shielding thickness obtained from this method and from Madey’s theory respectively, are completely coincident.  
          
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        发布时间：2021-04-09
      • Qiu Chengfeng Xu Shiru Yang Zhigui
        Issue 2, (1992)
        摘要：Beryllium metal was implanted by N+ with different doses. The relationship between implantation dose and wear rate or microhardness was determined experimentally. The surface structure of the specimen was analysed by X-ray diffraction and the profile of implanted ions was obtained by RBS.Results show that the specimens after implantation have higher microhardness and lower wear rate, and the best implantation dose is 5.4×1017ion/cm2.  
          
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        发布时间：2021-04-09
      • Xu Junquan Xu Xunjiang
        Issue 2, (1992)
        摘要：Using the ECPSSR ionization theory and L-subshell fluorescence yields, the relative intensities of LX-rays induced by 0.18-10MeV protons impact on gold and 1.0-4.0 MeV 4He-ions impact on bismuth have been calculated. The results are in good agreement with experimental measurements reported. The L-subshell coupling effects are not found.  
          
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        发布时间：2021-04-09
      • Hao Luyuan Xu Xiaoliang Xu Kezun Yang Bingxin Wang Jun
        Issue 2, (1992)
        摘要：A continuous beam intensity stabilization apparatus used in experiments is discussed. The range of beam intensity is 5nA-5μA with a stability of better than 2×10-2/h.  
          
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        发布时间：2021-04-09
      • Gu Yingmei Zhu Jieqing
        Issue 2, (1992)
        摘要：A digital scanning graphic monitor based on Apple Ⅱe microcomputer has been at work on the SINR SPM instead of storage oscilloscope. It can display the distribution graphics of trace elements within the micro-area. For data acquisition a dual channel A ID converter samples the X and Y scanning voltage whenever a signal is within a preset energy window and with proper delay. In order to improve the clearness of pictures by adjusting their contrast, four threshold levels with buffers have been set to store pictures at different 4evels. The other three buffers are used to store and restore pictures displayed on the screen. The scanning graphic can be enlarged or lessened when changing the scanning range. The signals which trigger the A/D converter can come from emitted X rays or secondary electrons.  
          
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        发布时间：2021-04-09
      • Ji Changsong
        Issue 2, (1992)
        摘要：A new kind of n-γ combined scintillation detector with n-γamplitude discrimination has been developed. Such a detector is able to detect n andγ rays simultaneously, and give out neutron and gamma signals with different amplitudes. A special device made of 6Li glass as sensitive materials is used as the scintillator. Based on this new developed detector the FT631 Type Combined Moisture/Density Gauge has been designed and produced. The principle and main features of the new detector are described.  
          
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        发布时间：2021-04-09
      • Wang Yinsong Zhuang Guisun Tan Mingguang Zhi Min Cheng Yuandi
        Issue 2, (1992)
        摘要：This paper describes the determination of trace elements in biological materials by RN AA. As the interfering activities are removed by radiochemical separation, RNAA is a precise and reliable analytical method. For quality assurance of measurements, the trace elements As, Cd, Cu, Hg, Se and Zn have been determined in biological blind samples by various research groups from different countries. The results show RNAA is the best method in the blind sample analysis.  
          
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        发布时间：2021-04-09
      • Zhou Meiying Wang Guoping
        Issue 2, (1992)
        摘要：A fast, sensitive and accurate method for the separation and determination of hydrolysate of proteins labelled with tritium is described. Tritium labelled proteins, 3H-ribonuclease A, 3H-soybean trypsin inhibitors and 3H-elastin which dissolved in 6mol/l HCl and sealed in evacuated glass tube, were hydrolyzed for 24 hours at 110℃. The hydrolysate was then concentrated at 50-55℃, and cleaned with SEP-PAK C18 Cartridge. The eluate was injected to Waters Amino Acids Analysis System, the chemical quantity of amino acids was determined with a post-column fluorometric system. Each amino acid was collected respectively and its radioactivity was measured with a liquid scintillation counter. It was confirmed that tritium atoms were labelled at stable position of the amino acids of proteins.  
          
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        发布时间：2021-04-09
      • Hu Miaojun Zhou Weinan
        Issue 2, (1992)
        摘要：A target sample preparation technique is reported for 10Be determination by 2 × 6 MV tandem accelerator mass spectrometry（AMS） in SINR. Due to the high price of 17O enriched water and in order to meet with success in making Be17O, 18O enriched water is used to make Be18O as a test. Be is extracted as Be（OH）2 from the original sample with EDTA as shielding reagents and various ions are precipitated at different pH values- The natural 16O in Be（OH）2 is replaced through exchange by18Oin H218O. Be（18OH）2 is then converted to Be18O at high temperature in vacuum. The exchange efficiency is 49.6%.  
          
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        发布时间：2021-04-09
      • Sun Aimin
        Issue 2, (1992)
        摘要：A comparison of radioiodine labelling methods of SOD with iodogen and chloramine T is reported. The result indicated that the radioiodine labelling rate for the former （55.34%） was higher than that for the latter （42.37%） at the same condition, and the enzyme activity for the former （0.5U/μg） was also higher than that for the latter （0.2U/μg）. And the former is a simple, economic, efficient and speedy method.  
          
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        发布时间：2021-04-09
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