最新刊期
      卷 0 ， 期 0 ， 2020
      • Yujun Qiang
        Vol. 06, Issue 1, (1983)
        摘要：The described multiplier is basedon the variable transconductance principle. The instrument fist the equation Z=X · (Y+KX+Y0). When the X and Y inputs vary from 0V to 10V, the non-linearities are both less than 7‰. It is designed for identifying the sorts of nuclear particles in charged particle reactions. At present, It has succeeded in identifying p. d and a particles.  
          
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        发布时间：2022-08-16
      • Zewu Yao
        Vol. 06, Issue 1, (1983)
        摘要：The expansion of SCORPIO-2104 software system and the establishment of a new real-time measuring system are described. A practical example in experimental reactor physics is also given.  
          
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        发布时间：2022-08-16
      • Ruiju Zhou,Yuanlong Ye,Meiying Zhou
        Vol. 06, Issue 1, (1983)
        摘要：The β-radioactivity of HPLC eluent were measured by homogeneous and heterogeneous scientillation.Two kinds of flow cells were designed and their uses while studies.In heterogeneous system, the eluent passed directly through a U-shaped cell packed with finely devided solid scintillators, including POPOP, poly-naphthalene esters or plastic scintillator.Such system is suitable for preparative liquid chromatography. The detective efficiency of 3H and l4C were 1.9%, 40% respectively. The corresponding limits of detection were 0.1µCi/ml, 0.02µCi/ml.In homogeneous system the eluents were mixed with liquid scintillator by a spiral shaped or U-shaped flow cell, sample used in such system was non-recoverable. And the detective efficency of 3H and 14C were 50% and 80%, limits of detection 0.02µCi/ml. 0.001µCi/ml.  
          
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        发布时间：2022-08-16
      • Mingjun Wang,Yonglu Chen
        Vol. 06, Issue 1, (1983)
        摘要：The effect of dose rate and filler weight on radiation crosslinking of silicone rubber (SR)have been investigated in present work.The values of various crosslinking parameters may be calculated from the equations of crosslinking theory. We found that values are proportional to dose rate and weight of filler. From experimental data it can be seen that:values decrease with increase indose rate and filler weight. In the presence of filler, under the condition that total dose remains unchanged the effect of dose rate on sol fraction still follows the equation: logs=logso+B/IWhen q0 is constant, the relation between crosslinking density and dose can be written as for lower dose the experimental results shows that the equation can be reduced simplified to the well know form <n>-1=q0R.The effect of dose rate on crosslinking density is very small at low irradiation dose.  
          
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        发布时间：2022-08-16
      • Changai Wang,Peiling Xu,Jiqing Gu,Jianyi Huang
        Vol. 06, Issue 1, (1983)
        摘要：Absolute determination equipment of exposure for 10~50 kilovolt X-ray and correction factors were described in this paper. The uncertainty of measurement was about 1.8% for 10~50 kV X-ray.  
          
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        发布时间：2022-08-16
      • Xiangtong Lin,Shouzhen Deng,Weiren Zhang,Jinming Zhang
        Vol. 06, Issue 1, (1983)
        摘要：In this paper, enzymatic radioiodination of five polypeptide hormones (HTSH, HGH, HCG, HLH, OFSH) accomplished since 1978 is described studies were carried out in three respects: (1) The influance of various experimental conditions on enzymatic radioiodination, such as, amounts of LPO and H2O, pH value, time and temperature of reaction etc; (2)Stability of polypeptide hormones in storage and comparison between LPO method and CT method. It was shown that immunoactivity of former method is better and move persistant than that of the latter; (3) Beyond polypeptide hormones, radioiodination of LPO were studied. With practical amount of LPO, the iodination of LPO was trifle.  
          
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        发布时间：2022-08-16
      • Haochang Pan,Shijun Wei,Yuyuan Zheng
        Vol. 06, Issue 1, (1983)
        摘要：A low background automatic scintillation counter YSJ-SH79 was developed. In this instrument we adopted the technology of optical crosstalk discrimination and the four layer shield combined by lead, silver, copper and perspex. The samples are fed from underneath and samples can be automaticlly measured in turn. The quality reached by the instrument for 14C is as follows: the background is 2.222 cpm the detection efficiency is 78% and the figure of merit is 2738.  
          
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        发布时间：2022-08-16
      • Chunmei Zhou,Miaosun Chen,Panshui Yu,Runsheng Hong
        Vol. 06, Issue 1, (1983)
        摘要：In this paper, we have briefly described the method, the electronics circuit and the performance test of eliminating the irradiation effects in BF3 counter by high voltage modulating.  
          
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        发布时间：2022-08-16
      • Shengqing Yan,Dingyu Shen,Weijiang Zhao,Huiqing Fu,Jiaer Chen
        Vol. 06, Issue 1, (1983)
        摘要：The procedure of emittance measurement in 2 dimensional phase space is described, and retated formulas for different conditions are given. Considering various sources of errors the emittance-meter is then calibrated by means of setting standard acceptance and the results are presented.  
          
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        发布时间：2022-08-16
      • Yongxing Xu
        Vol. 06, Issue 1, (1983)
        摘要：The magnetic vetor potential A is used for calculation of two-dimensional magnetic field. The difference equations with irregular rectangular meshes are deduced from variational derivation, with the formula satisfying the boundary condition ∂A/∂n=0 derived naturally. Finally the simultaneous non-linear equations are solved by non-linear successive overrela-xation method. The results of calculation are rather well for the example magnet.  
          
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        发布时间：2022-08-16
      • Maosan Liu,Renhuai Chen,Wentai Wu,Shuzhen Li,Yucheng Liu,Caitu Shi
        Vol. 06, Issue 1, (1983)
        摘要：According to the principle of "Uniform magnetization" the 2-dimensional space expression for the constant direction magnetized multi-piece ring structure with plane head is given by the method of harmonic analysis. The imaginary project of 16-piece plane head quadrupole is computed, and comparison has been made with selected ordinary electromagnetic lens system.  
          
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        发布时间：2022-08-16
      • High Frequency Group of Cyclotron
        Vol. 06, Issue 1, (1983)
        摘要：In order to expand the frequency range and save the time needed for energy variation, the inductive coupling has been changed into capacitive. The coupling system now can be adjusted in a wide.  
          
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        发布时间：2022-08-16
      • Jingzhong Chen,Changrong Mu,Junfang Xie,Shiji Yang,Qingzhang Lei,Xingyuan Xia,Shulan Peng,Shaokuan Sun,Xiaohua Liu
        Vol. 06, Issue 1, (1983)
        摘要：In this paper the measurement of angular distribution of the bremsstrahlung in the target chamber of J-2 Van de Graaff electron accelerator is presented. X method for evaluating the exposure rate of bremsstrahlung in the target chamber was obtained in connection with the measurement. The exposure rate was thus employed in radiation protection of surroundings.  
          
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        发布时间：2022-08-16
      • Shoupeng Zhu,Guangren He
        Vol. 06, Issue 1, (1983)
        摘要：The autoradiographic study show that 99mTc-PYP was retained more than 99mTc-MDP in the blood stream. This was attributed to the rapid diffusion of the 99mTc-PYP into the circulating blood cell. The autoradiography of bone marrow smear shew that 99mTc-PYP localized predominately in the blast cell and freezing microautoradiography demonstrated that 99mTc-MDP deposited more in bone tissue than 99mTc-PYP. All of these might explain why 99mTc-MDP could produced good image shortly after administration.  
          
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        发布时间：2022-08-16
      • Xialing Zhao,jingzhi Liu
        Vol. 06, Issue 1, (1983)
        摘要：L-[3,5-3H] tyrosine is an important radiochemical used in biochemical research. In this paper its stability in different storage conditions was described. The mechanism of self-decomposition was thus discussed.  
          
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        发布时间：2022-08-16
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