最新刊期
      卷 0 ， 期 0 ， 2020
      • Yaojie Zhao
        Vol. 04, Issue 6, (1981)
        摘要：A simple analysis method of Ge (Li) complex γ-ray spectrum of a mixture containing several radioactive nuclides is described. By reconstructing the response matrix of the standard spectrum, the concentration of each component can be determined. Applying this method to the relative comparison detection, it is possible to compute the concentration very easy by manual operations or, with the aid of an electronic computer, to save much time.  
          
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        发布时间：2022-08-16
      • Liucheng Yang,Lü Feng,Guoan Cheng
        Vol. 04, Issue 6, (1981)
        摘要：This paper describes the measuring of the absolute activity of 144Ce by the 4πβ-γ coincidence absorption method. The corrections of background, dead time and resolving time have been done respectively with the measured results. The total uncertainty of the measurement is about ±0.6%.  
          
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        发布时间：2022-08-16
      • Yusheng Liang,Gongqing Wang,Yiping Zhang
        Vol. 04, Issue 6, (1981)
        摘要：We describe a method and show the measurement results of the radioactive fallout samples collected in Shanghai area soon after the March 1978 nuclear test of China. These environmental samples which contain about 20 short-lived γ-emitting isotopes, have very weak radioactivity (10-11 ~10-9 curies) . Two algorithms are used to determine the peak areas: the Wasson Algorithm (WA) for single peaks, and the nonlinear least-squares fitting algorithm without matrix inversion (AWMI) for unresolved peaks. It has been proved successful to apply this combined method to low-level γ ray spectrum assay.  
          
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        发布时间：2022-08-16
      • Guanghou Wang,Deming Liu,Zuomin Zou
        Vol. 04, Issue 6, (1981)
        摘要：This paper introduces a method of linearized least square fit to experimental data of Mössbauer spectra. An available, easy to use and wellfunctioned FORTRAN (IV) program is given, including experimental data fitting drafting as well as the calculation of Mössbauer parameters.  
          
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        发布时间：2022-08-16
      • Fule Lou,Zhongmei Zhao,Guozhen Li,Jianhua Wu,Guangquan Liu,Shenbo Liu,Suokang Yang
        Vol. 04, Issue 6, (1981)
        摘要：The electro-deionizing mechanism of packed bed electrodialysis and the transferation behavior of some radioactive nuclides passing through the electrodialyzer were investigated. The formulae for calculating the deionizing current efficiency were derived and proved by experiments. A DPC process including electrodialysis and packed bed electrodialysis for the treatment of low-level radioactive waste water was proposed with the operating data listed.  
          
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        发布时间：2022-08-16
      • Chongguo Yao
        Vol. 04, Issue 6, (1981)
        摘要：In this paper the specifications and computational method of the constant gradient waveguide are discussed. A group of data for approximately estimating and designing the waveguide is also given.  
          
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        发布时间：2022-08-16
      • Deming Zhu
        Vol. 04, Issue 6, (1981)
        摘要：This article describes a selector for multiple input multichannel scaling which should be used in combination with a multichannel analyzer. It can be used for multipoint measurement, for example, to measure the neutron distribution changing from time to time at different positions in a nuclear reactor, or in a multi-sample mode to measure the half-lifes of some short-lived isotopes. In the selector P-MOS integrated circuit components are adopted and this makes it light in weight and easy to handle.  
          
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        发布时间：2022-08-16
      • Zhe Zhang,Yu Zhou,Wenxiang Chen
        Vol. 04, Issue 6, (1981)
        摘要：Several methods for measuring the wire tension in constructing multi-wire proportional chambers (MWPC) have been discussed. One of these methods, tentatively named as the electrostatic resonance method, has been given in detail, including the principles of the method, the experimental set-up and the results. It has been shown that this method is easy to apply and the performance of it is satisfactory.  
          
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        发布时间：2022-08-16
      • Shouli Yang
        Vol. 04, Issue 6, (1981)
        摘要：In liquid scintillation counting while automatic quenching compensation (or automatic efficiency control) is carried on, some abnormal phenomena may occur with the sample channels ratio curves. For Instance channels ratio may return or over one. In these cases, the values of the sample channels ratio can not be used for quenching calibration. The abnormal phenomena could be used to identify whether the lower discriminators of the two channels are equivalent.  
          
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        发布时间：2022-08-16
      • Wenzhao Gao,Quanqi Jiang,Xiulan Liu
        Vol. 04, Issue 6, (1981)
        摘要：We developed a method for reducing the resonant frequency of the R. F. system on the H-120 cyclotron with a ceramic vacuum capacitor. The capacitance, voltage and current in the capacitor were calculated and the operation performance of the capacitor was reported.  
          
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        发布时间：2022-08-16
      • Xiuying Wang
        Vol. 04, Issue 6, (1981)
        摘要：The ordinary method of resistance heating is only used for vacuum evaporation of materials of low melt point. Generally, special methods are needed for high melt point elements or oxide. One method is using electron bombardment heating. Present paper discussed the adjustment of geometric parameters in order to optimize the focusing condition at a simple laboratory made system and, as a test, self supporting boron film has been prepareted.  
          
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        发布时间：2022-08-16
      • Gengen Zhu,Jialing Gong,Tong Zhu
        Vol. 04, Issue 6, (1981)
        摘要：A method for the preparation of 3H-naloxone with high specific activity (57Ci/m mol) is discribed. It was found that the high-affinity binding and lowaffinity binding for 3H-naloxone with opiate receptor have dissociation constants of =1.25±0.185nM and =24.5±5.05nM respectively. When Na was kept at 100mМ, and using 3H-naloxone as the tracer, there was no "sodium effect". Moreover, we have designed a system having the same chemical composition but using a different tracer to study the property of an unknown endorphin. It was found that the methionineenkephalin is morphine-like and not naloxone-like.  
          
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        发布时间：2022-08-16
      • Deming Zhao,Miaoshen Qian,Chengquan Tang,Zhengzhong Gu
        Vol. 04, Issue 6, (1981)
        摘要：Antiphrine-14C made in China was used in quantitative measurement of the regional cerebral blood flow in rat by means of the autoradiographic technique. As soon as the tracer was injected intravenously, the rat's brain was freezed. Serial histoiogical sections and autoradiograms were made under freezing condition. The local transparencies of the autoradiogram were measured and the cerebral blood flow in different regions was then indirectly calculated.  
          
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        发布时间：2022-08-16
      • Yibao Wang,Guoqiang Zhang,Enan Wu
        Vol. 04, Issue 6, (1981)
        摘要：The application of the programmable electronic controller of a 5000g. Ra. eq. 60Co irradiation chamber is presented. The design of the output cricuit of the controller is also described. With the help of the controller, the machine of the 60Co irradiation chamber can be operated automatically.  
          
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        发布时间：2022-08-16

        知识介绍

      • 东元 刘
        Vol. 04, Issue 6, (1981)
        摘要：高能辐射以及放射性核素日益广泛地应用在工业、农业、国防的各个部门。射线技术、放射性示踪剂、活化分析等已渗透到化学、生物学、物理学、医学、地质学、考古学等各门学科领域。因此，熟悉并正确使用放射性强度单位和辐射剂量单位，不仅对专业研究者是有意义的，而且对从事与放射性有关的一般工作者也是十分必要的。  
          
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        发布时间：2022-08-16

        来稿摘登

      • 素仙 葛,秀英 王
        Vol. 04, Issue 6, (1981)
        摘要：众所周知，没有一种薄膜制备的方法能对各种材料普遍适用。目前，少数稀土元素可用真空蒸发的方法制备核物理实验用靶，但收集效率较低，同时由于稀土金属蒸发温度高，使靶造成污染。而分子镀方法是适于稀土元素快速定量的一种电沉积方法。它和一般电沉积方法的区别在于：电流通过期间以化合物的形式沉积在阴极上，保持恒定的高电压，使用有机溶剂。这种方法制备靶的优点是能给出极薄的薄膜或较厚的膜（10～2000µg/cm2以上）；大多数情况下沉积的膜是比较均匀的，并有很好的附着力，沉积效率可达100%，沉积时间短，制备样品所需的材料量少并易处理，所以对稀有或贵重材料如放射性同位素制靶是特别适用的。本文叙述了在异丙醇溶液中电沉积制备Nd靶的方法。  
          
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      • 根祥 顾,鸿贵 李,宗坤 仲,茂柏 陈,崇觉 姚
        Vol. 04, Issue 6, (1981)
        摘要：为了开展质子激发X荧光分析和带电粒子活化分析，要求1.2米回旋加速器提供3.5MeV质子束和7 MeV氘束。在工作磁场为16kGs，引出束流半径为52.5cm，D电路工作频率为12MHz时，为了加速荷质比为1/3的H3+离子，我们在1978年8月，采用在D电路第一耦合孔处共振丝上并接了二只CKT-150pF、40kV、170A的陶瓷真空电容器，将D电路的工作频率降到8MHz，成功地加速了H3+和氘氢混合气体（D+H）离子，分解后得到3.5MeV的质子（H+）和7MeV的氘核（D2+），扩展了原设计中加速粒子的能量，有效地满足了开展核技术研究工作的需要。  
          
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        发布时间：2022-08-16
      • 辛 章,正修 杨,瑞勤 丁
        Vol. 04, Issue 6, (1981)
        摘要：双炔失碳酯、1,8-双二氯乙酰辛二胺（又称Win 18446）是两种避孕药物，前者为女用避孕药，后者能抑制生精过程，是有希望的男性抗生育药物。为了研究它们在体内的吸收分布和代谢以指导合理用药，我们合成了它们的14C-标记化合物。双炔失碳酯（Ⅰ）的标记其合成路线基本与非标记合成[1]相似，但操作上作了适当改进。所用乙炔-14C2，是用碳酸钡-14C（0.5g， 5mCi）按文献方法[4]制备。  
          
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        发布时间：2022-08-16
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