最新刊期
      卷 0 ， 期 0 ， 2020
      • Deng Yufu
        Issue 8, (1998)
        摘要：Based on the Gaussian distribution of D and T ion beam currents on the target of a neutron tube, a dependence of the neutron generation rate on the neutron flux density at a certain point in the neutron field was derived theoretically. Then the neutron generation rate for the 60mm neutron tube was estimated to be 2.2×10/s by measuring the flux density at a certain point with the activation method.  
        关键词：Neutron tube;Neutron generation rate;Neutron flux density;Activation method   
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        发布时间：2022-08-16
      • Issue 8, (1998)
        摘要：High speed CMOS circuits 54HC04 were subjected to irradiations with the same total dose of 1×10Gy（Si） but at two different dose rates, and annealing measurements were performed at room temperature. The variance of both damage mechanism and failure mode for different dose rates was analysed, and the influence of dose rate on the reliability of high speed CMOS circuits in radiation environments Was disscussed.  
        关键词：High speed CMOS circuit;Irradiation;Annealing;Dose rate   
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        发布时间：2022-08-16
      • Issue 8, (1998)
        摘要：Solid state glycine（Gly） films were implanted with 20 keV N+ ions. Then theinduced damages were studied by the measurements of electric conductivity, aminocontent in aqueous solution and α- particle transmission spectra. It is shown thatthe amount of damage products increases with increasing implantation dose and thendecreases after reaching a peak. The XPS data revealed that several damage productswere formed in which C and N elements have different binding energies that those inunimplanted glycine.  
        关键词：Ion implantation;Implantation-induced damage;Glycine;Low energy heavy ions   
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        发布时间：2022-08-16
      • Issue 8, (1998)
        摘要：Relative doses of 75MeV/u 12C ion beam after passing through different thickness of degraders were measured with the double ionization chamber method. The degrader’s thickness as then equalized to penetration depth of the beam in water and its Bragg curve was obtained. The measured Bragg curve is compared with that calculated based on a model set up by the authors. Meanwhile, the inactivation effect of the ion beam passing through different thickness of degraders on melanoma （B16）cells was measured, and the corresponding survival fraction data for B16 cells were acquired.  
        关键词：C ion beam;Bragg curve;lonization chamber;Melanoma cells;lnactivation effect   
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        发布时间：2022-08-16
      • Issue 8, (1998)
        摘要：A new method to correct complex matrix effect in EDXRF by using characteristic pararneters and assortment simulation has been expounded in this paper, and some results of on-the-spot application are given. The method can be spread to some other complicated samples and be widely used.  
        关键词：EDXRF;Matrix effect;Characteristic parameters;Assortment simulation   
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        发布时间：2022-08-16
      • Issue 8, (1998)
        摘要：用仪器中子活化法测定了６种马尾藻中５种常量元素和２１种微量元素的含量，研究了其中各种元素的水浸出率。发现马尾藻对以三价和三价以上价态存在的元素富集系数较高，而对以一价和二价存在的同一族元素，原子半径越大则富集系数越高。主要以一价存在的元素８０％以上以水溶性存在，以二价或多价存在的元素水浸出率小于５０％，主要以三价存在的元素水浸出率介于二者之间。碱金属和碱土金属随原子半径的增大水浸出率减小。  
        关键词：马尾藻。无机元素;赋存状态;中子活化分析   
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        发布时间：2022-08-16
      • ZHANG Chao,ZHOU Zhuying,ZHAO Guoqing,SUN Chuanchen (Accelarator- based Atomic and Nuclear Physics Laboratory
        Issue 8, (1998)
        摘要：报道了聚酚亚胺薄膜在高能（６５０ｋｅＶ－２ＭｅＶ）Ｂ＋、Ｃ＋和Ｃｕ＋离子注入后硬度的变化。对注入样品进行了显微硬度测量和ＸＰＳ及ＲＢＳ分析，观察了硬度与离子种类、能量及注入剂量的依赖关系。结果表明，离子注入之后薄膜样品的显微硬度值明显提高，注入离子在样品中的电子能量损失对聚合物材料改性起着关键作用。ＸＰＳ和ＲＢＳ分析显示，离子注入之后聚酰亚胺薄膜中Ｃ的含量增加，形成了以苯环结构为主的新的交联网状结构。  
        关键词：高能离子注入;聚酚亚胺;显微硬度;XPS;RBS   
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        发布时间：2022-08-16
      • Issue 8, (1998)
        摘要：采用Ｉｏｄｏｇｅｎ为氧化剂，成功地对人血清白蛋白和纤维蛋白原进行了碘化标记。然后用这些标记化合物分析和比较了４种二氧化钛材料对白蛋白和纤维蛋白原的吸附性质。发现样品日能够较多而又稳定地吸附白蛋白，而吸附纤维蛋白原则较少，表明其血液相容性优于其它几种样品。  
        关键词：￣（125）I标记;白蛋白;纤维蛋白原;血液相容性;二氧化钛   
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        发布时间：2022-08-16
      • SHI Huisheng
        Issue 8, (1998)
        摘要：The foundamental principle on the measurement of density distribution of liners is presented in this paper. The measurement is based on the detection of γ-rays passing through the liner of shaped charge used in petroleum production. The measured results were compared with those from the penetration test, and a good agreement was observed. The technique is therefore useful for improving the liner’s manufacture and raising quality of the shaped charge .  
        关键词：Shaped charge;Liner;Density determination   
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        发布时间：2022-08-16
      • CHEN Jie
        Issue 8, (1998)
        摘要：采用预辐射接枝法，对聚丙烯纤维分别采用电子束和６０Ｃｏｙ射线在空气和氮气氛下进行辐照，然后将样品置于苯乙烯－醇溶液体系中进行接枝反应。研究了吸收剂量、反应温度、反应时间、苯乙烯浓度等对接枝率的影响以及预辐照样品的开放时间、存放条件等对接枝率的影响，并比较了两种不同辐射源在预辐射接枝中的差别。  
        关键词：辐射接枝;苯乙烯;聚丙烯纤维   
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        发布时间：2022-08-16
      • Issue 8, (1998)
        摘要：用扫描力显微镜（ＳＦＭ）观测高能重离子轰击云母样品造成的潜径迹在不同的ＳＦＭ图象中的表现形式，并探讨了针尖在表面扫描时摩擦力对ＳＦＭ图象中离子潜径迹反差的影响。  
        关键词：离子潜径迹;扫描力显微镜;图象反差   
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        发布时间：2022-08-16
      • Issue 8, (1998)
        摘要：Abstract  
        关键词：Ar离子辐照;Si;非晶化;双空位   
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        发布时间：2022-08-16
      • Issue 8, (1998)
        摘要：＠王震遐，李学鹏，王玫珉，许浔江，唐紫超，黄荣彬，郑兰苏￥中国科学院上海原子核研究所，厦门大学固体表面物理化学国家重点实验室Ｃ＿（６０），恐龙蛋壳化石，ＴＯＦ质谱，ＨＰＬＣ恐龙蛋壳化石中Ｃ＿（６０）的研究王震遐，李学鹏，王玫珉，许浔江(中国科学院上海原子核...  
        关键词：C＿（60）;恐龙蛋壳化石;TOF质谱;HPLC   
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        发布时间：2022-08-16
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