最新刊期
      卷 0 ， 期 0 ， 2020
      • Yuanfu Xia
        Vol. 11, Issue 12, (1988)
        摘要：Mössbauer spectroscopy has become very important for elucidating the hyperfine interactions between nucleus and its environment. Its features are given in this paper. The main emphasis is put on the description of recent advances on the methodology and the applications. Finally, the prospects are indicated.  
        关键词：Mossbauer spectroscopy;nuclear method   
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        发布时间：2022-08-16
      • Yuren Liu
        Vol. 11, Issue 12, (1988)
        摘要：The element analysis technique based on 252Cf neutron activation for industrial process control has been introduced. The present situation, characteristics, prospects of applications and the task in this field in our country have been discussed.  
        关键词：Neutron activation analysis;Prompt gamma rays;delayed gamma rays;HPGe detectors;microcomputer multichannel analyzers online;element analysis;industrial process control   
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        发布时间：2022-08-16
      • Yuguang Wu,Huixing Zhang,Xiaoji Zhang,Yan Luo,Tonghe Zhang,Zhuen Han
        Vol. 11, Issue 12, (1988)
        摘要：The MeV implantation is very important for fabricating semiconductor devices and very large scale integrated circuits. The carrier concentration profiles of high energy P+ implanted into silicon have been studied. P+ ions with energy ranging from 0.5 to 7.5 MeV were implanted into silicon with dose ranging from 2×1012 to 1013/cm2. The results indicate that carrier concentration profiles consist of two Gaussians with different deviation σfront and σback. A method of forming uniform profiles with multiple implantation was suggested.The various specific carrier concentration profiles can be obtained by multiple implantations with different energies, doses and masking technology. Rapid thermal annealing(RTA) has been used to obtain good reliability and repeatability. The residual defects of the samples are measured by high voltage TEM. It is shown that after RTA no defects appear. Specific transistors produced using P+ multiple implantation have satisfactory characters.  
        关键词：High energy ion implantation;carrier concentration profile;profile composition   
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        发布时间：2022-08-16
      • Songjiang Xia
        Vol. 11, Issue 12, (1988)
        摘要：A four parameter nuclear spectrum data acquisition system based on an IBM-PC/AT microcomputer is described. Each parameter has a maximum word-length of 12 bit, and one event recorded in sequential DMA mode consists of two to four parameters. The interface of this system is composed of a multiparameter controller and a DMA controller. The main features of the system are simple and low cost, so it can be applied widely.  
        关键词：multi-parameter;nuclear spectrum;Data acquisition   
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        发布时间：2022-08-16
      • Jinxin Lin,Renbo Zhang,Yong Zhao,Peifen Shen,Minghai Li
        Vol. 11, Issue 12, (1988)
        摘要：A microcomputer-based intelligent RIA gamma counter, Model FMJ-82, is introduced. The sample conveyance, data acquiring, data processing and the output of results are controlled or performed by the microcomputer with an efficiency >75%, background <70cpm (for 125I), counting resolution time <50 ns and sample capacity 250. Four data processing modes are provided.  
        关键词：microcomputer;Radioimmunoassay;gamma counter interface;intelligence;program   
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        发布时间：2022-08-16
      • Yuren Liu,Yali Xie,Yonghai Wang
        Vol. 11, Issue 12, (1988)
        摘要：The recent development of the sediment concentration gauge consisting of a 238Pu low-energy X-ray source, a proportional counter and a microcomputer is reported. The measuring method and its software, as well as the error analyses, are given. The minimum measurable sediment concentration is as low as 0.072 kg/m3, and the standard error is 0.024 kg/m3. The effective measuring range of the probe is less than 5 cm, so the gauge is suitable for measuring the concentration of the sediment near the bottom of a river.  
        关键词：sediment concentration;Proportional counter;low energy X-ray;microcomputer   
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        发布时间：2022-08-16
      • Luona Chen,Borong Bao,Yanfei Li,Yuanxian Xia
        Vol. 11, Issue 12, (1988)
        摘要：A method is presented for the measurement of integrated thermal neutron flux in a high flux reactor by a Co-activation method. The measured value of integrated thermal neutron flux was compared with the calculated value. The method is very useful for the determination of a higher integral thermal neutron flux in a high flux reactor for a long period of irradiation time.  
        关键词：high flux reactor;intergral thermal neutron flux;cobalt activation method   
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        发布时间：2022-08-16
      • Limin Zhang,Guangcai He,Qi Chen
        Vol. 11, Issue 12, (1988)
        摘要：Effects of some scintillating solutes and solvents on counting efficiency for 3H and 14C were presented.  
        关键词：scintillation solute;solvent liquid;scintillation counting   
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        发布时间：2022-08-16
      • Shulan Wu,Renfei Feng,Kezun Xu,Fuyun Xi
        Vol. 11, Issue 12, (1988)
        摘要：The function and result, as well as its design idea, of the microcomputer-based four scalers, applied in the Cerenkov line spectrum rediation experiments, were described. The hardware interface can simultaneously accept four inputs of NIM logic unit. It can also complete the level translation, judgement and count of signals, etc. The software, adopting both the machine and BASIC languages, can complete the data acquisition, interrupt processing, real time display, data saving and processing, etc. The system can simultaneously carry out both the real time measuring and the data processing.  
        关键词：Data acquisition;Data processing;microcomputer;Scaler;Cerenkov line spectrum radiation   
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        发布时间：2022-08-16
      • Wensen Hu,Mingjie Wu,Jigao An,Hongbin Chen,Jianliang Cai
        Vol. 11, Issue 12, (1988)
        摘要：Model FD-86 radiometer is introduced and its main characteristics are described. It cabe used to measure α,β, γ -rays. The instrument is simple in structure, easy for operation and stable in performance.  
        关键词：radiometer;measurement of α, β, γ-rays   
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        发布时间：2022-08-16
      • Sanjun Zheng,Xiangtong Lin,Wanting He
        Vol. 11, Issue 12, (1988)
        摘要：A radioreceptor assay for human growth hormone was developed. The receptor preparation was 25,000g pellet from the livers of pregnant rabbits. Iodination of GH with 125I was preformed by the methods of Lactoperoxidase and Iodogen. The sensitivity of assay was 0.67±0.11 ng/ml serum.Serum hGH levels in 72 cases of normal subjects, 102 cases of acromegaly were mea sured by RRA, and the results were compared with those obtained by RIA.  
        关键词：human growth hormone;radioreceptor assay;liver cell membrane;iodination   
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        <引用本文> <批量引用> 28339024 false
        发布时间：2022-08-16
      • Ruiying Fang,Huiyang Zhao,Lihong Cai,Aina Yuan,Liren Shao,Maoqin Liu,Jingquan Wen,Jianzhong Wang,Wuben Cheng
        Vol. 11, Issue 12, (1988)
        摘要：The cerebral perfusion imaging agent 99mTc (DL)-HM-PAO has some good characteristics which make it very ideal in measuring regional cerebral blood flow.The (DL)-HM-PAO was synthesized and labelled with 99mTc by ourselves. The results of animal experiments and preliminary clinical triols were very satisfactory.  
        关键词：cerebral blood perfusion;disstereoisomer (DL)   
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        <引用本文> <批量引用> 28339025 false
        发布时间：2022-08-16
      • Xigei Guo,Zhenqing Liu
        Vol. 11, Issue 12, (1988)
        摘要：Normal dog blood lymphocytes were irradiated by 60Co γ-rays at doses of 0.50, 0.25, 0.05, 0.01 and 0.005 Gy with dose-rates of 0.20, 0.10, 0.01, 0.003, 0.001 and 0.0003 Gy per min. in vitro. Lymphocyte survival was distinguished with an exclusion test of trypan blue. The results from the examination at intervals of 0.4 and 8h after exposure suggest that a relation between effects and doses is not obvious at the initial duration and is gradually increased with time by a linear correlation. On the other hand, an inverse dose rate effects on lymphocyte survival was observed from begining to end.  
        关键词：dog;lymphocytes;small dose radiation;radiation damage effects;radiation dose response   
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        发布时间：2022-08-16
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