最新刊期
      卷 0 ， 期 0 ， 2020
      • Gongqing Wang
        Vol. 06, Issue 5, (1983)
        摘要：Cubical spline function has been applied to determine internal conversion coefficient of γ-ray with a definite energy which belongs to a particular nuclide. In order to fit the experimental photopeak efficiency of a Ge (Li) detector, three groups of cubic spline function are used. The detection efficiency of any γ-rays can be obtained by spline interpolation.  
          
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        发布时间：2022-09-13
      • Xingmin Xiong
        Vol. 06, Issue 5, (1983)
        摘要：This paper presents a method of eliminating the affects of the time resolution function in the positron annihilation lifetime spectrum fitted with a multi-exponential function. The peeling method has been used to estimate initial value of the parameters, then the iterative process in Gauss-Newton's method is easily converged. The program (PLSEF) has been worked out. Its reliability and applicability has been shown in its applications.  
          
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        发布时间：2022-09-13
      • Qinmin Fan
        Vol. 06, Issue 5, (1983)
        摘要：An unfolding method was applied to doppler broadened spectra in the positron annihilation. In this method the experimental data were used directly in the unfolding process without assuming any functional forms of the spectra. The advantage of this method rested on the decrement of certain errors. These errors may usually be introduced when the functional forms were assumed in some unfolding processes.  
          
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        发布时间：2022-09-13
      • Yufang Zheng,Zhengfang Yu,Jingye Lu
        Vol. 06, Issue 5, (1983)
        摘要：In this paper a method for the analysis of the complex Mössbauer spectra involving computerbased spectrum stripping is described. The reference spectra of various standards are measured and stored in a computer-accessible form. The stripping calculations are performed one by one until the residuals become simple. Then the residual spectra can be analyzed on a least-squares fitting computer program.This method has already been used on a DJS-21 computer whose capacity is small. Spectrum stripping can also be carried out by a TRS-80 microprocessor.  
          
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        发布时间：2022-09-13
      • Jinghua Qian,Yurong Zhang,Xiaofeng Wu,Weilong Wang,Agen Zhang,Longxing Zhang,Chengfu Shen
        Vol. 06, Issue 5, (1983)
        摘要：Elastic recoil detection analysis (ERDA) has been developed for determining the amount of hydrogen-atoms in a film. The principle and some preliminary results of the method are given in this paper. The hydrogen content in a VYNS thin film was measured and found to be in agreement with the PIXE analysis within ±10%. This method is suitable for thin films of thickness of 1~10μm with sensitivity being about 5 × 1015at./cm2.  
          
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        发布时间：2022-09-13
      • Tianxi Hu,Jiazhi Xia
        Vol. 06, Issue 5, (1983)
        摘要：There are three types of BL: functional, dark and inductive BL. Three types of BL were measured by LSC operating in-coincidence summation mode. The results indicate that LSC can be employed to measure all BL — not only weak luminescence but also ultra weak luminescence. LSC for measuring BL has some characters, namely high sensitivety, good reproducity and quickness. At present, as commercial photocounter is not available, LSC is a useful tool for measuring BL. In this study, we also make some suggestions on improving LSC for measuring BL.  
          
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        发布时间：2022-09-13
      • Naizhang Huang,Zhiyong Li
        Vol. 06, Issue 5, (1983)
        摘要：In this paper, advantages and disadvantages between the pulsed photo feedback and the resistance feedback are described. Causes of the noise in resistance feedback and measures taken to reduce noise are discussed. A way to reduce noise slope is described. A charge sensitive preamplifier is made based on the above analyses. The noise of the preamplifier is 140~150 eV with a source capacitance of 0 pF. The energy resolution of 243eV for MnKα X-ray is obtained when it is used with a Si (Li) semiconductor detector.  
          
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        发布时间：2022-09-13
      • Gongqing Wang,Jingyi Liu,Jiabi Zhu,Yiping Zhang
        Vol. 06, Issue 5, (1983)
        摘要：On the basis of the character of Ge (Li) gamma-full-energy-peaks obtained from a multichannel analyzer, minicomputer can be used to analyse gamma-spectrum. The bands of exploration are applied to the automatic peak search. Peak area and position are determined by peak criteria. After energy calibraton, the following can be calculated: peaks energy, absolute detection efficiency of full-energy peak in a certain geometry, absolute activity of γ-peak and so on. Some examples are given and the advantages and disadvantages have been discussed.  
          
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        发布时间：2022-09-13
      • Shengzhu Liang,Jun Xie,Yingxin Luo
        Vol. 06, Issue 5, (1983)
        摘要：The obtained optimum energy resolutions were 11.7% and 12.0% by using the mixtures of Ar + 4% Xe and Ar + 20% Xe respectively for the 5.9 keV X-ray in case of the suitably small values of M and P×a.In order to get conveniently high counting efficiency, satisfactory putting down age and larger effective window area, some experiments have been carried out. Some results are presented.  
          
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        发布时间：2022-09-13
      • Lijin Jiang,Zhutang Wen,Bingnan Zhong
        Vol. 06, Issue 5, (1983)
        摘要：The paper describes the determination of the gamma sensitivity and the exposure factor of a tissue-equivalent ionization chamber and an aluminium chamber. The experimental results agreed well with the nominal values within definite uncertainty.  
          
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        发布时间：2022-09-13
      • Zengguang Zhang,Deren Wang,Yuming Liu,Henghui Sun,Yuan Xu
        Vol. 06, Issue 5, (1983)
        摘要：Some Pi+N+ diodes were irradiated with 1.3MeV electron beam. It is found that the minority carrier lifetime will decrease with the increasing of radiation dose. The induced defects by radiation are mainly duel vacancies, and the irradiated devices work stably and reliably.  
          
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        发布时间：2022-09-13
      • Dongchu Lu,Zongliang Lu,Zhiheng Chen,Guangde Hu,Renbo Zhang,Changyun Yan
        Vol. 06, Issue 5, (1983)
        摘要：According to the principle of radon detection in electric field, ThA as well as RaA are both ionized particles with positive charge in its original state, so that they are able to collect within the electric field, Radon meter type FDC-80 was used to measure thorium content. Theoretical calculation and the condition in practical use were studied. The experimental results indicate the method has a greater rapidity and a higher accuracy as compared with both static meter and balloon method.  
          
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        发布时间：2022-09-13
      • Xinbo Ni,Jinlong Xu
        Vol. 06, Issue 5, (1983)
        摘要：The TDPAC (time differential perturbed angular correlation) method is used to investigate the radiation damage induced by electrons in metal material Ag and Ni. The energy and flux of electron are 1 MeV and 2.5×1017~1018 electron/cm2 respectively. Two kinds of defects were found. One of them is stable, and the other is in nonequilibrium diffusion process and depends on the total dose of radiation.  
          
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        发布时间：2022-09-13
      • Xianjia Pan,Zhongtian Sun,Guoqiao Jin
        Vol. 06, Issue 5, (1983)
        摘要：Four pieces of ancient potsherd have been analysed by their Mössbauer spectrum, three of them are the remains of the Longshan culture and the fourth one may be the Peilikong culture but it is in dispute. The aging effect has been observed and the original firing temperature of a ware which belongs to Longshan culture late period is confirmed.  
          
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        发布时间：2022-09-13
      • Shuxin Wang,Benxi Gu,Qi Jiang,Shengkang Liu
        Vol. 06, Issue 5, (1983)
        摘要：In this paper the method of measuring gadolinium content in Ba1-xGdxFe12-xZnxO19 and Ba1-xGdxFe12O19 by thermal neutron transmission is reported. The application of this method is also discussed.  
          
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        发布时间：2022-09-13
      • Diyuan Li,Yun Zhang,Xianmiao Chen,Suling Cao,Baogang Xu,Hao Jiang
        Vol. 06, Issue 5, (1983)
        摘要：Tetrabutyl tin-loaded liquid scintillater has been used for gamma counting of 125iodine with a scintillation counter instead of the use of traditional gamma counter. The results of liquid scintillation counting measurements were closely agreed with those obtained by gamma counting method in the radioimmunoassays of some samples including PRA, AngiotensionⅡ, enkphrine and bradikinin. The results show that this method may extend the liquid scintillation, to gamma counting.  
          
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        发布时间：2022-09-13
      • Meifen Li
        Vol. 06, Issue 5, (1983)
        摘要：Since the concentration of tritium is very low in natural water, the emulsion counting method was applied to increase the water capacity in scintillation solution. Thus its sensitivity can be improved. In order to select the optimal formula of Triton X-114 emulsifier-scintillator or water ratio, equi-merit value line was plotted on equilateral triangle phase diagram to determine the high merit value region. Effect of temperature on equi-merit value curve was observed. Two kinds of emulsifier, Triton X-114 and Triton X-100, were compared under different temperatures.  
          
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        发布时间：2022-09-13
      • Changming Feng,Zhaohe Gong,Zhanfeng Zhang
        Vol. 06, Issue 5, (1983)
        摘要：The twin plates Co source assembly described in this article shows a good success of exploratory development in this field. This adjustable assembly not only provides good uniformity of radiation dosage and wide irradiation zone but also smaller irradiation zone with high rate of radiation dosage. Thus it gives a new way for multi-purpose utilization in polymer irradiation and various fields of application.  
          
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        发布时间：2022-09-13
      • Tiancheng Xiao,Zhijun Peng
        Vol. 06, Issue 5, (1983)
        摘要：Leather and its products mould easili. How to prevent them from mould is a problem which have been studied for a long time. This paper describes a new technique for mould proofing by γ-ray irradiation to heal the mould. It is found that the leather after irradiation can be preserved from mould for more than one year at room temperature under normal condition.  
          
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        发布时间：2022-09-13
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