最新刊期
      卷 0 ， 期 0 ， 2020
      • Shiping Chen,Boli Liu
        Vol. 12, Issue 12, (1989)
        摘要：The development of adrenal imaging agents were reviewed carefully and extensively with an emphasis laid on cholesterol derivatives. The structure-activity relationship(i. e. tissue concentration kinetics) of adrenal imaging agents was discussed in detail to explore and select more practical compounds for adrenal imaging.  
        关键词：Adrenal imaging agent;Cholesterol derivatives;Structure-activity;relationship(SAR);131I;123I;75Se   
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        发布时间：2022-08-16
      • Jimin Li,Guizhen Li,Guodong Lin,Lijuan Liu
        Vol. 12, Issue 12, (1989)
        摘要：With a 109Cd source, the Compton scattering intensity and the X-ray fluorescence intensity of Fe in coal were used to determine the ash content in coal. The maximum deviation was lefs than ±1.5% for the ash contents from 6% to 50%, and the relative error in comparison with the gravimetry was less than ±1.5%. In this paper, the use of different radioisotope sources to determine the ash contents was also discussed.  
        关键词：X-ray method;Compton scattering   
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        发布时间：2022-08-16
      • Huaiqun Guan,Mingqian Wang,Gang Chu
        Vol. 12, Issue 12, (1989)
        摘要：The Monte Carlo calculation of 60Co γ-ray's albedo-doserate from the ?? is reported. A formula is presented with which the relations of the albedo-doseiate with some parameters are simulated and fitted.  
        关键词：Albedo-doserate from the air;Monte Carlo calculation   
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        <引用本文> <批量引用> 28341179 false
        发布时间：2022-08-16
      • Jufeng Pang,Guifang Zheng,Liang Wang,Qingbiao Liu,Rong Wu,Fuxing Yan,Xiaofeng Hou
        Vol. 12, Issue 12, (1989)
        摘要：After Chernobyl nuclear reactor accident, by using an Ge(Li) anti-Compton gammaray spectrometer, we analyzed fallout, aerosol and lettuce leaves in Xi'an area, and khew the contamination levels by radionuclides. On the basis of the data and making use of some models of evaluation, we evaluated the environmental quality in Xi'an area and compared it with that in other areas in China following the accident. The radiation hazard to the public in Xi'an area was discussed and health evaluation was made.  
        关键词：Chernobyl accident;Ge (Li) anti-Compton;gamma-ray;spectrometry;Concentration of radionuclides   
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        <引用本文> <批量引用> 28341197 false
        发布时间：2022-08-16
      • Hong Xu,Jiguan Wei,Zongyou Yan,Wenliang Zou
        Vol. 12, Issue 12, (1989)
        摘要：The levels and variation of 131I contamination in forage grass and milks in Urumqi area following the Chernobyl nuclear power plant accident are reported.The estimated thyroid committed dose equivalents for adults (1.2µSv) and for infants (120µSv) were far lower than the limit set by the Basic Health Standards for Radiological Protection in China, thus it produced no harmful effects toward the health of inhabitants.  
        关键词：Nuclear accident;131I;Euvironmental sample;Activity;Thyroid   
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        <引用本文> <批量引用> 28341181 false
        发布时间：2022-08-16
      • Baokun Cui,Jingcheng Wang
        Vol. 12, Issue 12, (1989)
        摘要：The rule of s line-shape parameters varying with temperatures was investigated for Ti-6Al-4V alloy by means of the positron annihilation technique after high temperature-quenching and isochronous ageing at temperatures ranging from 200 to 1000℃. The trans formation mechanism of α′ martensite was discussed.  
        关键词：Positron;Phase transformation   
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        <引用本文> <批量引用> 28341231 false
        发布时间：2022-08-16
      • Guohuan Dai,Qisheng Liu,Jian Fu,Jiying Sun
        Vol. 12, Issue 12, (1989)
        摘要：A new method was developed for analysing the positron lifetime spectra on the graphical display screen of an IBM PC. The multi-exponential function model was used and the lifetime components of the spectrum were stripped one by one from the longest to the shortest while the graphics on the display screen were changing correspondingly. The obtained initial parameters of a lifetime spectrum are efficient and good enough to be used by the IBM PC (Professional) POSITRONFIT Program as input data.  
        关键词：Positron lifetime spectrum;Multi-exponential function model;Spectrum stripping   
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        <引用本文> <批量引用> 28341254 false
        发布时间：2022-08-16
      • Qisheng Liu,Guohuan Dai,Jiying Sun,Yingru Ding,Jianhua Yao
        Vol. 12, Issue 12, (1989)
        摘要：A new method was developed determining the solid solubility of a metal oxide series prepared by precipitation using the positron lifetime parameters. The positron lifetime spectra were measured of a seris of CuO/ZnO catalysts prepared by precipitation in which the CuO at% contents were different before and after reduced. The relations were obtained between the solid solubility of the catalysts and the positron lifetime parameters, from which a result of solid solubility of 12 CuO at% after reduced had been found. The viewpoint that the Cu+ ion acted as the active centre in the CuO/ZnO catalyst was supported.  
        关键词：Precipitation;Methanol synthesis catalyst;Solid solubility;Active centre;Positron annihilation   
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        <引用本文> <批量引用> 28341259 false
        发布时间：2022-08-16
      • Dairong Wan,Xuecai Liang,Yunsheng Dai
        Vol. 12, Issue 12, (1989)
        摘要：To improve the fast neutron position-sensitive spectrometer which was used in small-angle neutron elastic scattering measurements and differential cross section measurements of some nuclear reactions in few-nucleon systems, a large plastic scintillation detector (5×50cm) equipped with two photomultipliers was constructed. The principle and performance of this detector are described.  
        关键词：Fast neutron;Plastic scintillator;Position-sensitive detector   
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        <引用本文> <批量引用> 28341256 false
        发布时间：2022-08-16
      • Jianda Hu,Xianghai Kong,Houren Hu,Dahong Ding,Zhaoyi Zhao,Ruihan Yu
        Vol. 12, Issue 12, (1989)
        摘要：Tritium gas is of strong permeability which depends strongly on the materials contacted. In order to select the best elastic compound materials for the making of tritiumproof gloves, the permeability of tritium gas in various materials were measured by useing the propotional counting technique.  
        关键词：Tritium gas permeability;Protective materials from tritium;Tritium-proof protective glove   
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        <引用本文> <批量引用> 28341271 false
        发布时间：2022-08-16
      • Lanhua Lou,Wenshu Fu
        Vol. 12, Issue 12, (1989)
        摘要：A method differing from the original method of activated carbon separation was introduced. Acetate fibre film separation, similar to that of cGMP determination was used. Comparison between the two methods showed that the efficiencies of isotope measurements are approximate while the significance test of the difference in regression cofficients for the two standard curves revealed P<0.001, and that variations within and between batches were smaller than 10%, and the recovery more than 95%. However, the improved method was increased in sensitivity of measurement, regularity of results and simplicity of operation. It also had advantages such as higher working efficiency and less isotope pollution.  
        关键词：Protein competition assay;Cyclic adenosine monophosphate (cAMP);Acetate fibre film   
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        <引用本文> <批量引用> 28341268 false
        发布时间：2022-08-16
      • Zuoen Zhang,Zhimin Li,Xiongqi Gong
        Vol. 12, Issue 12, (1989)
        摘要：3H-NSP is current important reagent for introduction of tritium into proteins and polypeptide. The precursor, N-succinimidyl acrylate was obtained by the reaction of acrylic acid with N-hydroxysuccinimide in the presence of DCC and it was tritiated with tritium gas in the presence if 10% Pd-C catalyst. The crude product was purified by silica gel chromatography. The radiochemical purity and specific activity were ~95%and 1.35 TBq/mmol respectively.  
        关键词：Tritium;N-succinimidyl acrylate;3H-NSP   
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        <引用本文> <批量引用> 28341291 false
        发布时间：2022-08-16
      • Yuexing Wang,Yongjie Lu,Xiaolin Ma,Changquan Yun,Fuqiang Su
        Vol. 12, Issue 12, (1989)
        摘要：This paper presents a method of calculation the average whole-body absorbed doses and factor F for dogs irradiated with 60Co y-rays. The F values for 10 different d0(dog's shouldor width) are calculated and a comparison between the calculation and the experimental data from other authors is made, showing a good agreement between them.  
        关键词：Absorbed dose;Dog phantom;Graphite ionization chamber;Thermoluminescence detector   
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        发布时间：2022-08-16
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