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      卷 0 ， 期 0 ， 2020
      • Yunxia Lan,Minyao Li,Zhangzhi Wang
        Vol. 09, Issue 5, (1986)
        摘要：A new method for radioactivity standardization in liquid scintillation counting was described. In the method a triple to double coincidence ratio was taken for a reference quantity of efficiency change and the coincidence counting was extrapolated to the value of TDCR=1, thus may lead to an approximate value for the sample activity directly.This paper shows the principle of the method, the efficiency calculation and the estimate of the uncertainty. The measured result for tritiated water coincides with the nominal value of the NBS standard within an uncertainty of ±0.63%.  
        关键词：Activity;absolute measurement;Liquid scintillation counting;TDCR method   
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        发布时间：2022-09-13
      • Yiqun Zhang,Xiaolian Wang,Junjie Zhu,Congrong Wang
        Vol. 09, Issue 5, (1986)
        摘要：In this paper the Mössbauer spectroscopy of high counting rate is detailed. It is compared with the normal Mössbauer spectroscopy. If channel counting rate had been over 2×105 c/h on a 512 channel spectrometer, we have obtained the Mössbauer spectra of magnetic type and archaeological samples.  
        关键词：the Mössbauer spectrometer;High counting rate;multiwire chamber;channel counting rate;magnetic type;archaeological sample   
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        发布时间：2022-09-13
      • Zhonglie Wang,Xunliang Ding,Yahong Qian
        Vol. 09, Issue 5, (1986)
        摘要：The conditions of forming tungsten silicide with As ion beam mixing have been studied by means of Rutherford backscattering. The comparison between sintering and ion beam mixing has been performed. The phases have been also identified by X-ray diffraction. The results demonstrated that the refractory metal silicide may be formed at a reduced reaction temperature using ion beam mixing technique. The effect of oxygen impurity on silicide formation has been observed. Finally, the mechanism on the formation of the silicide by ion beam mixing is simply discussed.  
        关键词：Ion beam mixing;refractory metal silicide;sintering;Rutherford backscattering   
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        发布时间：2022-09-13
      • Chaoqing Chen
        Vol. 09, Issue 5, (1986)
        摘要：This paper describes the principle, the structure and the performance of the time projection chamber taking LBL-TPC as an example. Other TPC's are also discussed.  
        关键词：time projection chamber;particle indentification;energy loss;Spatial resolution;Momentum resolution;dE/dx resolution;pattern recognition;relativistic rise;truncated mean;charged couple device   
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        发布时间：2022-09-13
      • Weiguo Jin,Zhuying Zhou,Guoqing Zhao,Yuehua Ren
        Vol. 09, Issue 5, (1986)
        摘要：This paper compares the general properties of a chinesemade cellulose nitrate and two kinds of cellulose acetate films with different thickness in discriminating α particles from protons. The 140 µm cellulose acetate film has finally been selected as the solid state track detector used in nuclear lifetime measurement by the blocking effect.  
        关键词：red film;Shanghai film;discriminating;Protons;α particles   
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        发布时间：2022-09-13
      • Yong Guo,Di Chen,Yisheng Luo,Zhongying Li,Changsheng Wang
        Vol. 09, Issue 5, (1986)
        摘要：The two detector method was applied for kerma measurements in 15 MeV D-T mixed neutron-photon field. The hydrogenous detector employed is the thimble- type IRM 81-TE1 tissue equivalent ion chamber developed by us and the non-hydrogenous detector is the neutron-insensitive philips 18509 Geiger-Mueller counter. This paper describes the experimental devices, methods and measurement results. The results of IRM 81T-TE1 ion chamber are found to be in good agreement with values obtained by the FWT IC-17A ion chamber.  
        关键词：tissue equivalent ion chamber;kerma;15 MeV D-T neutron field   
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        发布时间：2022-09-13
      • Zhaonan Zhu,Shanmei Xu,Dunzhu Lu,Kejian Zhao
        Vol. 09, Issue 5, (1986)
        摘要：When the sugar solution is irradiated, its rotation, pH and OD will be changed. These changes are proportional to dose. We have investigated these properties of sugar solution for determining Mrad level γ-rays dose from 5×105 to 107 rad, Results show that any of these parameters can be used for determining the dose deposited in the sugar solution.  
        关键词：sugar rotation;acidity(pH);optical density (OD)   
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        发布时间：2022-09-13
      • Zhixiang Xu
        Vol. 09, Issue 5, (1986)
        摘要：This paper describes the distribution of the scanning electron beam on irradiated samples, and indicates that the density of the scanning electron beam on samples is not uniform with trigonal magnetic field scanning. It is bigger in the middle. One reason causing this phenomenon is due to the eddy current.  
        关键词：scanning electron beam;Electron accelerator;irradiation sample   
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        发布时间：2022-09-13
      • Kejian Zhao,Shanmei Xu,Shuyu Lang
        Vol. 09, Issue 5, (1986)
        摘要：This papar reports the posibility of using lyoluminescence of glucose and sodium chloride pair for dose determination.If the parameters Kn, Kt, Hn and Ht are known, the following equations can be used to get Dn and Dγ in a mixed field, they are:公式The respones (the lyoluminescence yield) of the glucose and the sodium chloride are proportional to the absorbed dose in a given dose range.Dn and Dγ of mixed field used for calibration have been measured with pair ionization chamber. The experiments have shown that Kt of the glucose is 0.304 and Kn of the sodium chloride is 0.062, with Ht and Hn taking as 1.  
        关键词：lyoluminescence;mixed radiation field;pair dosimeter   
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        发布时间：2022-09-13
      • Yongyue Liu
        Vol. 09, Issue 5, (1986)
        摘要：The origins of the inconsistencies in the experimental data were analysed. An analytical method was proposed. The acoustic generation mechanism in liquids was examined. The results are inconsistent with any significant contribution from either microbubble formation or molecular dissociation. The thermoacoustic mechanism is dominant.  
        关键词：thermoacoustic mechanism;microbubble formation;molecular dissociation;respence of the hydrophone;Grünaisen coefficient   
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        发布时间：2022-09-13
      • Zongzhi Huang,Hongdi Zhou,Qiying Fang
        Vol. 09, Issue 5, (1986)
        摘要：A method for determination of trace elements in irradiated apples is described. Apple samples dried for 8 h at -40℃ to -50℃ prior to analysis, were burned to ashes in low temperature oven for 20h, and followed by dissolving in 1 mol/1 HCl. A1, Be, Cd, Co, Cr, Cu, Fe, In, Li, Mn, Mo, Ni, Pb, Sb, Se, Sn, Ti, V and Zn in the solution were determined by ICP emission spectrometry with a sensitivity of from 1.0×10-4 to 7.0× 10-9g, recovery rates of 62.8% to 116.96% and relative standard deviations laying between 0.9136% and 231.5%.  
        关键词：irradiated food for fresh;ICP-AES;Trace elements   
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        发布时间：2022-09-13
      • Junjie Ren,Zetao Qu
        Vol. 09, Issue 5, (1986)
        摘要：This paper introduces an instrument for measuring the radioactive contamination. Some home-made CMOS integrated circuits were adopted in the instrument. It provides a six-digit display. Its highest count rate is 106/sec. It can work on AC er DC voltage and its working current is less than 72 mA. It is a portable instrument and can be used in laboratories to measure sample radioactivity.  
        关键词：radioactive contamination;contamination measuring meter   
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        发布时间：2022-09-13
      • Changzheng Liu,Rui Shi,Lei Shi,Zheng Fang,Rongchang Chen,Jinghua Wu,Guanxiang Huang
        Vol. 09, Issue 5, (1986)
        摘要：Experimental result of a rapid labelling method, namely, the hydrothermal melting method is described. Our results indicate clearly that the hydrothermal melting method, which is simple, easy and rapid, obviously excels the heat refluxed method. The best reaction temperature is 180℃; reaction time, 60 min.; reaction solution volume, 20µl; and labelling efficiency, above 95%. The mechanism of isotopic exchange reaction is also studied.  
        关键词：m-iodobenzylguanidine;guanidine;iodobenzylbromide;condensation;hydrothermal melting method;rapid labelling method   
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        发布时间：2022-09-13
      • Bohui Wu,Jixian Zhang,Shengguo Zhang,Chengmo Zhu,Yulin Hu,Yuyuan Xie
        Vol. 09, Issue 5, (1986)
        摘要：A new method of solid exchange labelling of metaiodobezylguanidine was reported. The study of distribution in animal revealed that radioactivity was high in myocandium within lh, after injection and after 24 to 48 h, it localized more in adrenal medulla.  
        关键词：metaiodobenzylguanidine;solid exchange labelling;distribution in animal   
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        发布时间：2022-09-13
      • Jianhuan Zhu
        Vol. 09, Issue 5, (1986)
        关键词：radiochromic dye cyanide;radiochromic dye cyanide film dosimeter;optical waveguide dosimeter;hexahydroxyethyl pararosaniline cyanide;pararosaniline cyanide   
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        发布时间：2022-09-13
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