最新刊期
      卷 0 ， 期 0 ， 2020
      • Issue 6, (1996)
        摘要：The relative efficiencies to detect fission products by using a Φ76.2mm ×76.2mm NaI detector have been calculated for the real--time fuel element rupture detection and analysis.The calculated results show that the optimum gamma energies for the element rupture detection are 81keV（133Xe）,196.3keV（88Kr）,220.9keV（89Kr）, 249.8keV（135Xe）,402.6keV（87Kr） and 529.8keV（133I）.Ganuna ray energy higher than 800 keV is not suitable for the detection due to the interference of gamma rays from the activated products. The calculated results have successfully been applied to analysis of the element safety for a pressurized-water reactor.  
        关键词：Nuclear reactor;Fuel element rupture detection;NaI detector;Fissionproduct;Detection efficiency   
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        发布时间：2021-04-09
      • Tan Yajun
        Issue 6, (1996)
        摘要：The development method of data acquisition and processing software based on MS-Windows 3.X for safegUards is presented.The paper describes the design methods of graphical user interface（GUI）,multiwindow and multitask-based spectrum graph display, data acquisition and processing and the application of object-oriented programming（OOP）.Using the package,an effective prototype design path can be found for MS-Windows-based softwares.The methods and programs have been applied in some safeguard non-destructive assay system.  
        关键词：MS-Windows-based software;Graphical user interface;Spectrumdisplay;Object-oriented programming   
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        发布时间：2021-04-09
      • Hou Xiaolin
        Issue 6, (1996)
        摘要：Neutron activation analysis was used to determine the concentrations of 19 elements in normal and senile cataractous eye lenses. It was found that the concentrations of Ca,Na,Cl,Eu,Sb and Fe were significantly higher, but those of K,Rb,Cs,Cr,Mn,Co,Sc and Ce were significantly lower in senile mature cataractous lenses than those in normal human eye lenses. There was no obvious difference for the concentrations of Se,Zn,Mg,S and Th in the two groups.The positive correlations among Na,Cl and Ca,K,Rb and Cs were shown, whereas a significant negative correlation between Na,Ca,Cl and K,Rb,Cs was observed. The roles of these elements in the evolution of cataract are discussed.  
        关键词：Eye lens;Cataract;Trace elements;Neutron activation analysis   
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        发布时间：2021-04-09
      • Issue 6, (1996)
        摘要：In this paper introduced was the fundamental manipulation of a spectrum analysis software package. The spectrograph software package can provide the capability of selecting and viewing up to 10 spectra simultaneously in three dimensions;automatically optimizing any one of six regions of interest, C2. B-1calculation; full screen parameters editing,saving and recalling of modified spectra.  
        关键词：Liquid scintillation measurement;β spectrum analysis   
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        <引用本文> <批量引用> 8412706 false
        发布时间：2021-04-09
      • Issue 6, (1996)
        摘要：Diffusion of adsorbed deuterium in Ti-D compound has been studied.Theconcentration of deuterium both in the internal and at the surface of titanium afterdecomposing titanium deutride at an annealing temperature of 343oC were measuredby ’He--D forword recoil detection.From the obtained data and diffusion equations,the diffusion coefficient of deuteriu!n in titanium and the surface recombinationcoefficient were deduced.These coefficients are compared with that for the implanteddeuterium in titanium.  
        关键词：Diffusion coefficient;Recombination coefficient;Adsorption;￣4He-D forword recoil detection   
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        <引用本文> <批量引用> 8412298 false
        发布时间：2021-04-09
      • Issue 6, (1996)
        摘要：By assuming that the mass deposition products have irritation effect on cell for repairing irradiation damage and by considering both the energy effect and the mass deposition effect of low energy ion irradiation,a formula of the survival rate of cells is deduced.The chromosome aberration rate and the cell mutation rate are also inferred.With them,some biological effects,such as special "saddle shape"survival rate,are well explained.  
        关键词：Ions irradiation;Biological effects;Irritation effect model   
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        <引用本文> <批量引用> 8412337 false
        发布时间：2021-04-09
      • Issue 6, (1996)
        摘要：A two-layer Ti-O film prepared by using a technique of d.c.reactive sputter deposition with ion beam bombardment is investigated with XPS and AES.The results show that titanium oxides vary along with the depth of the film.There is a Tio2 layer on the surface of the film after the carbon contamination layer is sputtered away.Titanium and carbon enter the silicon substrate and silicon diffuses into the film during Ar+ bombardment, which causes co-existance of titanium oxides with various stoichiometric composition and the fraction of TiO2 first gradually reduces and then increases along with the film depth.Moreover,the mixed layer at the interface of the substrate and the film consists of TiO2,Ti2O3,TiO,partial oxidized SiO2-x and silicon.  
        关键词：Reactive sputter deposition technology;Two-layer Ti-O film;XPS;AES   
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        发布时间：2021-04-09
      • Issue 6, (1996)
        摘要：Dose distributions in a phantom irradiated by Leksell Ganuna Unit are simulated by Monte Carlo method.Results of the Monte Carlo simulation are in agreement with experimental data.  
        关键词：Gamma knife;Dose planning system;Monte Carlo simulation   
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        <引用本文> <批量引用> 8412360 false
        发布时间：2021-04-09
      • Issue 6, (1996)
        摘要：The parallel measurements were carried out on the n-type Si single crystal and the n-type Si single crystal doped with Er and Gd.All these crystals were irradiated with 14MeV neutrons. The measurementS of resistivity were made, and the infrared absorption spectra were recorded using a Nicolet 170SX FT-IR spectrophotometer.No new infrared absorption peaks of the rare-earth elements in Si were observed after irradiation.However,the measurements of resistivity indicated much smaller changes of resistivity ratio in Si（Er）or Si（Gd）than that in Si.  
        关键词：Neutron irradiation;Rare-earth-impurities;Resistivity;Defects   
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        发布时间：2021-04-09
      • Wang Houwen
        Issue 6, (1996)
        摘要：A combinatory field achromatic 270°deflection system is described.A uniform field is combined with a nonuniform one in a symmetric magnet. Design of the system is based on the achromatic relation derived with the matrix method. Electron beam at the output is small in spot and symmetric with respect both to envelope and to divergent angle,indicating that the system possesses excellent achromatic and focusing properties.  
        关键词：Beam transport;Achromatic bending system;Combinatory field;Doubly symmetric beam   
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        <引用本文> <批量引用> 8412382 false
        发布时间：2021-04-09
      • Issue 6, (1996)
        摘要：An on-line neutron moisture measuring system for discontinuous moving materials（such as ore） mounted over a conveyor is described.A gamma density gauge was used to provide density-corrected direct readout of water content.in terms of weight percentage.Three groups of measuring signals coming from a slow neutron detector,a garnma ray detector and an electronic weigh system were together fed into a PC computer through a count card to realize data processing,recording and displaying.The prompt and average moisture content, as well as total material,pure dry material and water passing the measuring point at a certain time interval can be plotted or tabulated.  
        关键词：Neutron moisture gauge;Discontinuous moving materials;On-line measurement   
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        发布时间：2021-04-09
      • Jiang Bo
        Issue 6, (1996)
        摘要：The grafting reaction of MMA onto hydroxyapatite has been studied with the pre-irradiation method in air. The effects of radiation dose, monomer concentration, reaction temperature and inorganic acid on the system are observed. The grafting copolymerization is found to be controlled by the billetics. If proper kinetic conditions are selected,a better grafting yield can be obtained. Employing weight method, burning method as well as SEM and IR analysis, it has been proved that MMA is definitely grafted onto hydroxyapatite by chemical bonds, which shows that it is possible to improve the interface of inorganic-organic composite meterials and to make bioactive ceramics by using radiation induced-grafting copolymerization.  
        关键词：Radiation grafting;Hydroxyapatite;MMA;Bioceramics;Composite material   
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        发布时间：2021-04-09
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