最新刊期
      卷 0 ， 期 0 ， 2020
      • Issue 1, (1999)
        摘要：The damage of Mylar films by the keV ions was analysed with a transmissionenergy. spectrum of 5.5MeV a particles. The experiment showed that the keV ionscan pass through 18.3μm Mylar films. It was thought that the keV ion can sputterinterstitial atoms in the films and produce cavities, so the follow-up ions impingingupon the films have longer range. The maximum range of the ions is associated withthe radiation damage and a linear correlation between the maximum range of theions and the dose is established.  
        关键词：Low energy (keV) ion;Mylar film;Sputtering;Range   
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        发布时间：2021-03-12
      • Issue 1, (1999)
        摘要：The TiCxNy films were formed on 9Cr18 steel matrix using the ion beam assisteddeposition. The TEM analysis revealed the films with a polycrystalline structure with(111), (200) and (220) preferred orientation. The fact that TiCxNy films contain oxygencoordination was further confirmed by AES and XPS. Microhardness of the films wasfound dependent on its N content, and it was decreased for an excessively high Ncontent. An assisted dose of 3 X 1017/cm2 is optimum in this experiment. A dry frictiontest indicated that oxidation resistance of the films is excellent, and oxidation of thesteel matrix in the friction process can be obviously inhibited. Both the abrasive andadhesive wears of matrix are improved, and a trend of transformation from adhesiveinto abrasive wear appears for the steel matrix.  
        关键词：Ion beam assisted deposition;Titanium carbonitride;Friction;Adhesivewear;Abrasive wear   
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        发布时间：2021-03-12
      • Issue 1, (1999)
        摘要：A high-pressure twin gridded ionization chamber is introduced. After someadjustments, the chamber was used to measure the 58Ni(n,p) reaction. The resultsshow that the current system and method are suitable for the research of (n,p)reactions.  
          
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        <引用本文> <批量引用> 7199768 false
        发布时间：2021-03-12
      • Issue 1, (1999)
        摘要：A focused ion beam optical column with microwave ion source used formicrofabrication of cells is described in this paper. Both analytic calculation of beamdiameter in the column and numerical simulation of space- charge-induced beambroadening were made, and main factors influencing beam size and methods ofreducing the beam spot were found. By this system, a 25keV N+ beam of about 20 mdiameter with 148nA current was finally achieved when the aperture diameter was0. 1mm.  
        关键词：Focused ion beam;Microwave ion source;Beam size   
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        发布时间：2021-03-12
      • Issue 1, (1999)
        摘要：In order to improve dynamitron’s performance, a new scanning power supply hasbeen developed which provides triangular waveform current. This power supply hasmany advantages over original one: small size, light weight and easy to operate. Itcan also restrain high frequency noise, raise notably sweep homogeneity and add the.function of displaying output waveform..  
        关键词：Dynamitron;Scanning power supply;Triangular waveform   
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        <引用本文> <批量引用> 7199625 false
        发布时间：2021-03-12
      • Issue 1, (1999)
        摘要：In order to upgrad the current manual control system of the tandem accelerator,a distributed control system has been developed with a computer and some chips. It isused for automatic adjusting particle energy in a precise energy interval, dynamicdisplaying and stabilizing the status of the accelerator, as well as acquiring andsaving experimental data in database for future use.  
        关键词：Automatic energy scanning system;Distributed control system(DCS);Virtual instrument(VI);Communication   
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        发布时间：2021-03-12
      • Issue 1, (1999)
        摘要：The p-tert-butylcalix[4]-arene and p-tert-butylcalix[4]-arene acetate havebeen synthesized. The solvent extraction of uranium(VI ) with p-tert-butylcalix[4]-arene acetate was studied, including the effects of acidity in aqueous phase andconcentration of extractant in organic phase on the distribusion ratio. Theequilibrium constants of the extraction reaction were determined, and the reactionmechanism was discussed.  
        关键词：Calix-arene;Uranium(VI);Extraction   
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        发布时间：2021-03-12
      • Issue 1, (1999)
        摘要：The release curves, diffusion coefficients and release efficiencies of somerare-earth elements were obtained by studying the release behaviour of the 18O beamirradiated tantalum foil and tungsten/graphite powder mixed target. It is confirmedthat those elements can be fast released from the tungsten/graphite powder target athigh temperature.  
        关键词：Release efficiency;Release curve;Diffusion coefficient;Rare-earthelement;Solid target   
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        发布时间：2021-03-12
      • Issue 1, (1999)
        摘要：The CMOS operational amplifiers LF7650 were subjected to irradiation by 60Co rays, 1MeV electrons and protons of 4, 7 and 30MeV, respectively, and theradiation responses under these irradiation conditions were studied. The annealingmeasurements were also performed on the radiation damage caused by 60Co raysand 1MeV electrons at room temperature and 100 respectively. The reason whydifferent rays (in species and energies) cause different responses was discussed, andan explanation was given to the difference in response characteristics betweenCMOS analogue and digital circuits.  
        关键词：CMOS operational amplifier;Ionizing radiation;Radiation damage   
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        发布时间：2021-03-12
      • Issue 1, (1999)
        摘要：The surveillance of totalα and βradioactivities in soil, plants and water in theenvironment around the HIRFL is described. Continuous monitoring of seven-yearsshows that the activity of all samples collected around the HIRFL is at backgroundlevel and the facility’s operation has not caused any measurable contamination to theenvironment.  
        关键词：Environmental radiation monitoring;Heavy Ion Research Facility inLanzhou   
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        <引用本文> <批量引用> 7199719 false
        发布时间：2021-03-12
      • Issue 1, (1999)
        摘要：An on-line analysis program for quick appraisal of precious stamps by X rayfluorescence technique was designed. The program contains many functions such asmeasuring control, data acquisition, analysis and differentiation, stamp databaseadjustment etc., and the data acquisition and analysis can be completed while themeasurement is going on. Based on the program and some previous experiments, aterse and effective criterion can be established which makes quick appraisal possible.  
        关键词：Stamp;PIXE;Appraisal;On-line analysis program   
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        发布时间：2021-03-12
      • Issue 1, (1999)
        摘要：The brief history and present status of the electron beam purification of fluegases is presented. The reaction mechanism of removal of sulfur dioxide and nitrogenoxides is described, and some important parameters that influence the removalefficiencies are discussed according to the work conducted in SINR. The conceptualdesign and feasibility study of an industrial-scale unit of EB flue gases treatment arein progress.  
        关键词：Electron beam;Flue gases purification;Irradiation dose;Sulfur dioxide;Nitrogen oxides;Removal efficiency   
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        发布时间：2021-03-12
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