最新刊期
      卷 0 ， 期 0 ， 2020
      • Zhangzhi Wang,Weizhi Lü,Shuilong Wu,Yongkang Zhu,Yongkang Tan
        Vol. 05, Issue 2, (1982)
        摘要：A new method, by which we use single gas-flow multi-wire proportional counter for αβ simultaneous measurements, is recommended. Its measuring efficiency is higher than that of same kinds of products using multiple counters. For example, the detecting efficiency for 90Sr-90Y is more than 80% (2π), with the background less than 1cpm; the detecting efficiency for 239Pu is more than 75% (2π), with the background less than 0.05cpm. The lowest level the instrument can detect is 4×10-13Ci during the measuring period for general low level samples (for example 60 minutes).  
          
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        发布时间：2022-08-16
      • Daihua Liang,Guangtian Du,Houzhi Si,Guantao Shen,Weiquan Lai
        Vol. 05, Issue 2, (1982)
        摘要：The general design, construction, assembly techniques and the test results of five model radioisotopic power generators for surface use are briefly described. The rated power is 3 watts and the total energy converting efficiency obtained is 5.6%. The effective lifetime is more than 3 years.  
          
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        发布时间：2022-08-16
      • Zexia Zhang,Hailin Hou,Shuanghui Shi
        Vol. 05, Issue 2, (1982)
        摘要：A semiconductor fast neutron spectrometer consisting of a Au-Si surface barrier detector and a conical polyethylene foil radiator is described. It is characterized by the simple construction high energy resolution suitable detective efficiency and so on. The spectrometer serves the purpose of the measurement of fast neutron spectra of parallel beams from 2 MeV to 10MeV.  
          
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        发布时间：2022-08-16
      • Chunxiang Zhang,Daling Luo
        Vol. 05, Issue 2, (1982)
        摘要：A computer program is presented for calculating air concentrations of the short lived progenies of radon and thoron by use of either total alpha counts technique or alpha-particle spectrometry. The program is written in BASIC language. A TRS-80 model I microcomputer has been used in the calculation. It takes about 40 seconds to output the concentrations of radon and thoron daughters in air and the accuracies in the measurements.  
          
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        发布时间：2022-08-16
      • Jiaju Zhang
        Vol. 05, Issue 2, (1982)
        摘要：For determining axial power distribution in a reactor from in-core detector readings spline fitting method was described. It was assumed that the axial power distribution may be represented by quadratic spline. The results showed that this method was better than Fourier fitting.  
          
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        发布时间：2022-08-16
      • Zhenjie Wang,Yuqing Peng,Heling Yuan,Jingcheng Wang
        Vol. 05, Issue 2, (1982)
        摘要：The present work studied the dislocation densities in cold-rolled stainless steel by measuring the doppler broadening of the annihilation line. The specific trapping rate of dislocation for positron was given.The γ-rays due to annihilation were detected by a pure germanium detector with the sensitive volume being 0.1cm3. The resolution of the system for 514keV γ-rays of 85Sr was 1.2keV.Dislocation densities were calculated according to the formulae for F. C. C. pure metal. Results showed that they increased from 9×108cm-2 to 5.7×1011cm-2 as percent thickless reduced from 1% to 25%. The specific trapping rate for positrons was obtained: μd=0.58cm2·s-1.The results of present work made it clear that positron annihilation technique could be used to measure the densities of dislocation in alloys. However, the upper limit of dislocation density was about 10-12cm-2 due to the saturation effect of the annihilation parameters.  
          
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        发布时间：2022-08-16
      • Hongjin Pan,Tianbi Feng,Jingyi Rui
        Vol. 05, Issue 2, (1982)
        摘要：The 14MeV neutron can successfully be used for activation analysis of samples from lunar and stony meteorites. The contents of O, Si, Fe, A1, Mg in chordrules from Jilin and Allendu's meteorites have been measured elsewhere with other methods. In this paper, the major element analysis for Jilin and Allendu's meteorites with 14MeV instrumental neutron activation is described briefly.The results obtained in this way are compared with the data from other methods and an accuracy of about 2~20% can be achieved by this method.  
          
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        发布时间：2022-08-16
      • Caiqin Yu,Huizhen Xue,Zhangzhi Wang
        Vol. 05, Issue 2, (1982)
        摘要：According to the principle of our LB low background simultaneous α and β countting systems, the relation between the activity of the measured sample and the counts in α and β channels has been approached. Two methods for processing the counts from measured samples have been advanced, and one of them has been used in the measurement of environmental samples.  
          
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        发布时间：2022-08-16
      • Shicheng Wang,Maorong Huang
        Vol. 05, Issue 2, (1982)
        摘要：The effects of temperature on such properties as bulk etch rate, sensitivity, stability of latent tracks and registration efficiency have been investigated for Fuji film. The appliable temperature region for the registration of α particles and protons using Fuji film has been found.  
          
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        发布时间：2022-08-16
      • Gongqing Wang,Jingyi Liu,Genlai Xiao,Shangnu Lü
        Vol. 05, Issue 2, (1982)
        摘要：Radioactive waste liquid of DPC-electrodialysis technological process was measured by Ge(Li) γ-spectrometer at every node. The efficiency was calibrated. Autoanalysis programme of γ-spectrum was used. Concentration of 12 radioactive nuclides has been determined quantitatiuely.  
          
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        发布时间：2022-08-16
      • Mingqian Wang,Fang Zhang
        Vol. 05, Issue 2, (1982)
        摘要：This article introduces a γ-transmitting type thickness measuring instrument which consists of a NaI(Tl) scintillation counter and an 241Am radioadive isotope source. The measuring range is equivalent to steel thickness of 0~3mm. The error is not more than ±0.03µm.  
          
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        发布时间：2022-08-16
      • Yongyue Liu,Zhuguo Lu,Changquan Shen,Yuju Dong,Xingui Wei
        Vol. 05, Issue 2, (1982)
        摘要：The nonuniformity in various light collection methods had been measured.  
          
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        发布时间：2022-08-16
      • Xiangqin Meng,Fengzhang Li,Shuyu Lang,Liangyan Xue,Zhonglun Zhang
        Vol. 05, Issue 2, (1982)
        摘要：A tissue equivalent conductive plastic made in our lab. is similar to A-150 in basic properties. The tissue equivalence and fabricating procedure of the plastic are described. The important properties of the a plastic are recounted and compared with some plastics similar to A-150, which were made by other lab.The density of the plastic is 1.11±0.01g/cm3. The electrical conductivity of it is 5.4cmΩ. It is lower than that published in ICRU report-26. The content of hydrogen in this plastic is the same as that in similar plastics within a range of ±1%.  
          
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        发布时间：2022-08-16
      • Hongshan Du,Qizong Qin
        Vol. 05, Issue 2, (1982)
        摘要：The extractabilities of Pb, Bi and Po in the tribenzylamine/CHC13~HC1 system have been investigated. A procedure for the separation of radio-nuclides 212Pb-212Bi and 210Pb-210Bi-210Po was suggested. The separation method was easily be adopted and the separated products were carrier-free and radiochemically pure.  
          
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        发布时间：2022-08-16
      • Yunxia Lan,Weiyu He
        Vol. 05, Issue 2, (1982)
        摘要：The correspondance of the channel ratios was checked to evaluate the correspondance of the experimental spectra of two nuclides in a simplified efficiency tracing measurement of disinteg rating rate of tritium using 14C as a tracer. A linear efficiency tracing curve was successfully obtained with an interpolation method of the channel ratio, in which the efficiency loss ratio is about 1.000±0.001.  
          
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        发布时间：2022-08-16
      • Rongzhen Cao,Nianbao Zhang,Yuanlong Yie
        Vol. 05, Issue 2, (1982)
        摘要：[5,6(n)-3H] prostaglandin E1 was prepared by the catalytic reduction of prostaglandin E2. RhCl(pph3)3 was used as a catalyst.The specific activity of the product was 41Ci/mM. Its radiochemical purity was over 95%. The labelled compound can be used in the radioimmunoassay. [5,6(n)-3H]prostaglandin A1 was prepared by the acidification of [5,6(n)-3H] prostaglandin E1.  
          
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        发布时间：2022-08-16
      • Bohui Wu,Xingzhi Shao,Yongxing Li
        Vol. 05, Issue 2, (1982)
        摘要：We present a rapid one-step procedure (based on the melting method) for the labelling of Hippuran with radioactive iodine-131 isotope. The method has a high yield without additional purification.  
          
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        发布时间：2022-08-16
      • Wenkai Wu,Baoping Liu
        Vol. 05, Issue 2, (1982)
        摘要：The electrocardiogram-triggered gating device is used to control a gamma camera to take cardiac images at the end-systole and end-diastole. By means of this device, it is possible to make use of radionuclides to measure the cardiac function and estimate the condition of left ventricular wall's movement. The principle and the circuits of the device are presented in this paper.  
          
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        发布时间：2022-08-16
      • Jinglun He,Jinlian He
        Vol. 05, Issue 2, (1982)
        摘要：With the development of medicine, the production and application of the domestic 60Co therapy unit are increassing year by year. Does its physical performance conform to the requirement of the clinical use? It is necessary to make systematical measurement. This paper describes the systematical determination of the physical performance of the FYC-50H rotatheropy unit by a high precision ionization chamber dosimeter. The method can be used as a reference for comparsison in our metrological and medical departments.  
          
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        发布时间：2022-08-16
      • Keze Jin,Dezhong Zhou,Chengfa Fan,Hexiang Yiao,Shiqing Ou
        Vol. 05, Issue 2, (1982)
        摘要：This paper introduces a 60Co radiation facility designed and built by our institute. It can provide the multipurpose utilization for the radiation treatment of grain. The radiation facility has been demonstrated a good ability for radiation preservation and storage of rice. And it is also very economical in the expenditure as compared with the preservatioh of grain by chemical fumigation and storage by packing in vacuum.  
          
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        发布时间：2022-08-16
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