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      卷 0 ， 期 0 ， 2020
      • Fujia Yang
        Vol. 13, Issue 12, (1990)
        摘要：The work on so-called cold fusion is reviewed. The prospects for the cluster-impact fusion and the importance of studing the interactions between cluster molecules (or atoms) very solids are described.  
        关键词：Fusion;Cluster molecules   
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        发布时间：2022-08-16
      • Zi Xie
        Vol. 13, Issue 12, (1990)
        摘要：This paper describes the present status and development of radiation protection standard s, the eatures of radiation protection in nuclear energy age, and the purposes of the complete revision of ICRP publication 26 by the Commission. Some recent debates or fight in this field are also reviewed.  
        关键词：Standard;Radiation protection;Exemption limit   
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        发布时间：2022-08-16
      • Lianqiang Zou,Songlin Lu
        Vol. 13, Issue 12, (1990)
        摘要：Some up-to-date microcomputer-based optical fiber isolated remote control systems are studied, and a kind of design of high electric potential dual optical fiber isolated microcomputer controlled system with interruption communication is suggested.An equipment of this design has been fabricated and been used in monitoring and manipulating parameters of ion source power supplies in the EMIS' (Electro-Magnetic Isotope Separator) ion implanter. The results of tuning increment and output stability within 8 hours are both about 0.024%FSR.  
        关键词：Optical fiber isolated remote control;Interruption communication;Ion impianter   
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        发布时间：2022-08-16
      • Shipu Li,Guomei Wang,Ning Xing,Wei Ren,Xiaoming Chen
        Vol. 13, Issue 12, (1990)
        摘要：Surface electrical properties of Fe implanted Al2O3 followed by thermal annealling are presented. The Rutherford backscattering technique, Auger electron spectra and X-ray electron spectra have been used to study the structure of the implanted layer, the implanted ion range and the ion profile. Finally, the conduction mechanism in the implanted layer is discussed briefly.  
        关键词：Hall effect;LSS theory;Projection range;Concentration distribution;Lattice damage;Acceptor level   
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        发布时间：2022-08-16
      • Tiesheng Kang,Shicheng Wang,Pengji Zhai
        Vol. 13, Issue 12, (1990)
        摘要：A method for studying etching sensitivity of mineral tracks by measuring maximum projected lengths of spontaneous fission tracks from 238U is reported. This method can effectively solve the problems of selecting etching conditions of minerals. The etching sensitivities under three etching conditions for apatite from the Fish Canyon Tuff of Southwestern Colorado, USA were measured successfully.  
        关键词：Spotaneous fission track;Maximum projected length;Etching sensitivity   
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        发布时间：2022-08-16
      • Heqin Zhou
        Vol. 13, Issue 12, (1990)
        摘要：In this paper was presented an IBM—PC microcomputer based data acquisition and processing system for EXAFS with MWPC as its detectors. The design prineiple, hardware circuits and programming methods were described. The data acquisition program was written in BASIC.  
        关键词：EXAFS spectrometer;Data acquisition;Interface   
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        发布时间：2022-08-16
      • Xu Cai,Hong Huang,Lianshou Liu,Wanyan Qian,Haiqiao Wang,Daicui Zhou,Jingchen Zhou
        Vol. 13, Issue 12, (1990)
        摘要：Oxygen and sulphur ion-beams were accelerated at energies up to 200 GeV/nucleon in the CERN/SPS, which opened a new energy region for investigation on ultrarelativistic nucleusnucleus interactions. A new type of digital controlled apparatus is developed for efficiently measuring high multiplicity of the high-energy heavy-ion induced central reactions in nuclear emulsion chambers.  
        关键词：Nuclear interaction;Nuclear emulsion chamber;Digital controlled measurement;Reconstruction of events   
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        发布时间：2022-08-16
      • Renkang Cai
        Vol. 13, Issue 12, (1990)
        摘要：The acceptance diagrams of the components in a beam optics system are transformed to a certain point to form the acceptance diagram of the whole system. The task of beam optics calculation is to match the beam emittance diagram with the acceptance diagram of the system. The beam transportation efficiency can then be estimated. The ion implanter of LC-2B type is used as an example to illustrate the application of this technique.  
        关键词：Beam optics;Acceptance diagram;Emittance diagram;Ion implanter   
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        发布时间：2022-08-16
      • Borong Bao,Luona Chen,Yanfei Li,Yuanxian Xia
        Vol. 13, Issue 12, (1990)
        摘要：This paper describes a procedure for purification of 233U obtained from old MnO2 precipitate containing 233Pa and irradiated ThO2. Anion exchange and DMHMP solvent extraction were used for this purpose. The purity of 233U was checked by liquid scientillation counting and radioisotope X ray fluorescence analysis. A method for the preparation of standard a source is also given.  
        关键词：233U;Anion exchange;Solvent extraction;P-350   
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        发布时间：2022-08-16
      • Shengyun Zhu,Anli Li,Shengnan Zheng,Hanchen Huang,Donghong Li,Hongshan Du,Honglin Ding
        Vol. 13, Issue 12, (1990)
        摘要：The application of BaF2 detectors in high resolution TDPAC and TDPAD studies hasoeen reported. Probe nuclei with a lifetime of several nanoseconds could be used and very high hyperfine interaction frequencies could be precisely determined. The study of YBaCuO superconductor with 3.4ns 99Tc probe nuclei demonstrates the potentialities and advantages of BaF2 detectors in TDPAC and PDPAD studies.  
        关键词：BaF2 detector;TDPAC;TDPAD   
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        发布时间：2022-08-16
      • Gc Chen,Wenquan Zou,Jianzhong Sun,Yanggang Zhang,Bohua Shu,Shenpei Liu,Xiaoliang Gong
        Vol. 13, Issue 12, (1990)
        摘要：According to the quenching principle in beta ray measurement, liquid scintillation counters were used for quantitative measurement of protein. The results show linear relationship between the colored protein samples with different concentrations and the counting rate of LSC. It has been proved that LSC method is less erroneous and has larger measurement range than the traditional photoelectric colorimetry, and the analysis is easy to be automatized.  
        关键词：Liquid scintillation counting;Quenching effect;Protein quantification;Lowry's method   
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        发布时间：2022-08-16
      • Weiyu He
        Vol. 13, Issue 12, (1990)
        摘要：The methed of efficiency calibration for a HpG e detector is described in detail. An efficiency curve of spot source was determined for γ-ray energy region of 40-1400keV. For convenience of routine measurement, an efficiency curve of volume source was obtained in the same energy region with a total uncertainty of ± 3%.The satisfactory applications of this method to analysing medical radionuclides 201Tl and 77Br were briefly introduced.  
        关键词：γ spectrometer;Efficiency calibration;Medical radionuclide;Activity;Nuclear purity   
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        发布时间：2022-08-16
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