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      • Changyun Yan,Guangde Hu,Renbo Zhang,Minghai Li
        Vol. 06, Issue 6, (1983)
        摘要：A new method for the measurement of radon is described in this paper. The characteristic that initial RaA carries positive charges was used to make it possible to drift RaA onto the surface of the barrier detector in an oppropiate electric field. The activity of RaA on the detector surface can be measured in high efficiency and the concentration of radon can also be calculated. The new method is distinct from the conventional one using semiconductor device. The Detector acts not only as a signal monitor but also as an ion collection electrode. The sensitivity for one litre measurement chamber is nearly two order higher than that of the conventional instrument with barrier detector for measuring radon.  
          
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        发布时间：2022-08-16
      • Weiqi Shen,Mingli Dong
        Vol. 06, Issue 6, (1983)
        摘要：In this paper, the observation of radiation damage in silver is presented. The radiation damage in silver is induced by 111In ions that have been implanted into cubic Ag lattice following (α,2n) reaction.The silver foils were irradiated with 26MeV α particles under room temperature and liquid nitrogen temperature respectively, the dose rates were 0.5×1012α/cm2•s and 1.2× 1012α/cm•s. The radiation damage induced by nuclear collision have been studied corresponding to the dose rate and radiated temperature.In the experiments with samples irradiated under liquid nitrogen temperature by low dose rate, we have observed a definite sharp quadrupole frequency ω0 ± 82MHz. In quenching experiment, we get ω0±116MHz. In the measurement with samples irradiated under room temperature, we haven't seen any sharp frequency wether using large dose rate or low dose rate.  
          
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        发布时间：2022-08-16
      • Jiayu Xue
        Vol. 06, Issue 6, (1983)
        摘要：In this paper, the usability of multiple-exponential function model in fitting the positron annihilation lifetime spectrum is demonstrated. In preparation for the on-line analysis of positron annihilation lifetime measurement, we composed a versatile computer program (EXPFIT) which can be run on the micro-computer (PDP11/04) . It has been preliminarily verified being efficient and convenient in practice. In the program, three kinds of nonlinear least-squares fitting methods were supplied for processing the complex positron lifetime spectrum.Meanwhile, some discussions, such as errors of the fitting procedure and how to choose the estimate values of parameters and the starting point of fitting etc., are also concerned.  
          
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        发布时间：2022-08-16
      • Hanpeng Liu,Huaying Wang,Wenxun Wang
        Vol. 06, Issue 6, (1983)
        摘要：Both C+ and He+ beam-foil spectra have been obtained by using 200keV ion implanter and single-photon counter. The quantum effeciency of used optics system has been determined. Then the population of excited states of carbon has been found and compared with that predicted by theory.  
          
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        发布时间：2022-08-16
      • Keqing Chen,Jie Cheng,Yunfan Jin,Mingdong Hou,Changlin Li,Baoping Luo,Yuying Yao,Meizhen Wu,Zhichen Tong,Yaoyong Hou,Li Li,Chuan Cao
        Vol. 06, Issue 6, (1983)
        摘要：In this paper, the experiment of radiation damage of nickel and stainless steel by 12C-ions bombardment is described. 12C-ions are accelerated to 72.5MeV by 1.5m cyclotron. Irradiation dose of each sample is in the range of 0.15~0.5 dpa. The radiation effects have been studied by means of three methods: Microstructure of the sample after irradiation has been observed with transmission electron microscope. The activation volume has been measured by means of tensile test. The results of three methods show that voids occur in nickel sample but the radiation damage of stainless steel is not obvious.  
          
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        发布时间：2022-08-16
      • Daan Chen,Zhengmin Liu,Lianbin Wang,Chengde Gong
        Vol. 06, Issue 6, (1983)
        摘要：Transmittance of tubular steel sample was determined and its experimental results are shown. Based upon the results, oxygen of steel was determined by activation analysis with 14MeV neutrons, and it was compared with that by vacuum fusion methods.  
          
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        发布时间：2022-08-16
      • Zhenjie Chen,Shisheng Xu,Daze Sun,Liping Xu,Shaoxian Zhang,Jike Wang,Yuzhi Zhao,Xuexin Yan,Zhaomei Sun
        Vol. 06, Issue 6, (1983)
        摘要：This paper gives a brief introduction of quantitative analysis using XRF method (excited by radioisotope) , of about ten elements of worker's hair engagen in CS2 work. Of man's hair Ca, Cu, Zn, Pb, Cr, Sr and Cu/Zn are evidently lower than contrast group; women's hair is lower in Zn; no difference in Fe for both sexes.  
          
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        发布时间：2022-08-16
      • Meifen Huang
        Vol. 06, Issue 6, (1983)
        摘要：This paper describes two methods for the scattering and absorbed correction in a radioisotope source excited X-ray fluorescence analysis technique, that is two channel counting method and slope correction method. In the two channel counting method, the matrix effect can be controlled to about ±1% by using a two channel pulse height analyzer. The slope correction method has been applied to the thickness gauge for on line measurement of the thickness of a magnetic layer deposited on the tape. The accuracy of the measurement of the thickness is about ±5% (95% confidence level) .  
          
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        发布时间：2022-08-16
      • Sichun Zhou,Ye Zhang
        Vol. 06, Issue 6, (1983)
        摘要：This paper described a new absorption correction model by scattered radiation, which can be applied to portable X-ray fluoresence analyzes with scintillation or proportional counter. On the basis of this correction model, a new correction method called "equivalent model" has been established. With this method, we have measured Sb, Sn, Cu, Zn in some mines, and good results have been Obtained.  
          
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        发布时间：2022-08-16
      • Naitan You
        Vol. 06, Issue 6, (1983)
        摘要：The fabrication and characteristics of a 50mm2×1.5mm Si (Hp) detector are described in this paper. The detector was made of single crystal of ultra-high purity silicon, which was supplied by Zhejiang University. At room temperature 10℃, the energy resolution of the detector in 6.3keV and 8.58keV for 207Bi 481.6keV and 976keV internal conversion electron respectively, and 7.1keV for 137Cs 625keV internal conversion electron.  
          
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        发布时间：2022-08-16
      • Xiamin Shi
        Vol. 06, Issue 6, (1983)
        摘要：By using timing compensation system which consitsts of three ARC discriminators, the timing walk of coaxial Ge (Li) detectors was compensated and the time resolution was improved without counting loss. The pulse shape and the timing properties were analysed and calculated qualitatively. The experimental results coincide with the calculation values reasonably.  
          
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        发布时间：2022-08-16
      • Junliang Tian,Puling Liu,Yaqi Li
        Vol. 06, Issue 6, (1983)
        摘要：This paper describes a method of analysing gamma-ray spectra by a programmable calculator and presents two programs which have been used in the analysis of multicomponent gamma-ray spectra obtained from NaI (Tl) scintillation spectrometer. The results show that this method is satisfactory, and the programs can also be used in other types of small computer.  
          
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        发布时间：2022-08-16
      • Borong Bao,Luona Chen,Hesheng Qian,Yanfei Li
        Vol. 06, Issue 6, (1983)
        摘要：61Cu produced by alpha particle bombordment of natural nickel target was separated from target and purified with anion exchanger. The method is as follows. 61Cu is adsorpted on strong alkali anion exchanging column from 8N HC1 with a large amount of Ni passing through. 2N HC1 is then used to elute 61Cu from the column. By checking of γ-spectrum and half-life the 61Cu thus formed is proved pure enough for determination of its nuclear parameters. The method can also be applied to prepare medical radioisotope 62Zn from 30MeV a particle bombarded Ni target. However, 0.05N HC1 is used to elute 62Zn.  
          
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        发布时间：2022-08-16
      • Junheng Wu,Daming Zhang,Wenmin Wang,Muyao Zhou,Rongfa Zhang
        Vol. 06, Issue 6, (1983)
        摘要：This paper describes that light elements thickness on a heavy substrate have been measured by RBS (Rutherford backscattering spectroscopy) .From the backscattered energy spectrum shift of the substrate Ge, the thickness of the thin CaF2 layer on the monocrystal Ge has been determined. The results of measurements for sample 1 and 2 are 99Å (1+25%) , 113Å (1+25%) respectively.  
          
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        发布时间：2022-08-16
      • Yaozu Yan,Fuzeng Yao,Yuanfang Wu,Liufang Zhang
        Vol. 06, Issue 6, (1983)
        摘要：The leak detection tests of oil pipe line were carried out in Nu county Shandong province, using oil tracer of iodo-benzene (C6H5131I) labeled by 131I. C6H5131I was obtained through iodination of diazotized aniline. Because of the diazo-compound is unstable, thus the iodo-benzene must be prepared in site. Apparatus for semi-automic and remote operation was designed. More than 300 mCi of C6H5131I were prepared successfully and mixed with ten tons of petroleum, for leak detection of oil pipe line. It was demonstrated that the test was safe and reliable.  
          
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        发布时间：2022-08-16
      • Shenghai Cao,Dexi Wang,Shunchao Guan,Mingguang Yi,Chen Lin,Tanmu Zhang
        Vol. 06, Issue 6, (1983)
        摘要：Tritiated rubescensine A was prepared by tritium gas exposure method under 1kV electric discharging. The specific activity of product was 207.7mCi/mmol with radiochemical purity over 95%.  
          
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        发布时间：2022-08-16
      • Limin Zhang,Qi Chen,Jie Sun,Dihua Zhang
        Vol. 06, Issue 6, (1983)
        摘要：Labelad pectin and dextran was obtained by condensation of the polysaccharides with 14C-labeled cyanide in the presence of a carbonate-bicarbonate buffer. The products were purified using an ion exchange resin. Experimental results show that the structures of labeled polysaccharides were not change. Evidently specific activities of products were 3~4Ci/mg (14C-pectin) and 1μCi/mg (14C-dextran) . Radiochemical purities of products were more than 97%. The content of monosaccharide is less than 3%.  
          
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        发布时间：2022-08-16
      • Qianmei Ji,Yongchuan Wang,Jiong Zhang,Xichang Shi,Yun Wang,Zhentang Zhou,Yifang Ye,Shengyang Chen,Caijie Gu,Fasheng Fan,Liufang Zhang,Haiqiu Bao,Weiyu He,Qixun Sun,Yongjian Li
        Vol. 06, Issue 6, (1983)
        摘要：After 11C-benzoic acid was intravenously injected to mice of ICR strain, the radioactivity was rapidly localized in kidney. The maximum uptake rate of kidney reached 52±5.7 D%/g. Observation of concentrating and elimination of 11C-benzoic can be carried out within 15 minutes after intravenous injection to the rabbit under kinetic imaging. The propioic acid uptake rate of myocardium of mice was 12.5±4.2D%/g Either uptake ratio of heart to lung or that of heart to liver was around 1.9.  
          
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        发布时间：2022-08-16
      • Dazhi Guo,Xuelin Cai,Feng Yang,Anguo Zhou,Zaimian Ming,Jihui Deng
        Vol. 06, Issue 6, (1983)
        摘要：The fattening swine were rationed with different portions of rapeseed meal, terramycin, berberine hydrochloride and andrographolide. The effects of these factors on the uptake of radioiodine (131I) in thyroid glands and on the serum level of thyroxine (T4) and swine's weight gain per day were observed. The results indicated that the uptakes of 131I, serum levels of T4 and weight gains in the groups rationed with rapeseed meal of less than 18% were higher than that of the control group; the highest was that of the group fed with 12% rapeseed meal. When the swine were rationed with 100~1500ppm terramycin, the 131I uptakes and weight gains were higher than that of the control, but the T4 levels were lower than that of the control. In the groups rationed with 10ppm berberine hydrochloride or andrographolide the 131I uptakes, T4 concentration and weight gains were higher than that of the control. In the groups supplied with 50ppm of berberine hydrochloride or andrographolide, the 131I uptakes and T4 concentration were lower than that of the control; but the weight gains were still higher than that of the control. The data obtained would contribute to the understanding of the relationship between thyroid function and weight gain of swine, and to the make-up of diet for swine.  
          
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        发布时间：2022-08-16
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