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      • Yuzheng Wang,Jinxin Lin,Liren Jiang,Lianxue Gu
        Vol. 09, Issue 9, (1986)
        摘要：This paper discribes the thickness determination of magnetic layer on aluminum disc packs using 238Pu excited fluorescence X-rays of Fe. The method is rapid, nondestructive and highly precise. The principle of measurement, design of detection device, elimination of interference factors and data treatment are discussed. The range of thickness measurement is 0.5—15µm. The precision of the thickness measurement is better than 5% when thickness of coating is over 1µm.  
        关键词：energy-dispersive;coating;Mass thickness   
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        发布时间：2022-09-13
      • Haishan Xu,Zhengyu Xiang,Yunshan Mu,Yaoshun Chen,Jinrong Liu
        Vol. 09, Issue 9, (1986)
        摘要：For determining fast neutron radiative capture cross sections a new capture gammaray counter of approximately 4π geometry has been developed. The counter is in a sphere shape with a diameter of 1 meter filled with 680 liter liquid scintillator. The tank in shielded by 10 cm thickness of lead and 40 cm thickness of Li-paraffin. A coincidence method is used for reducing background due to neutron capture by the hydrogen in the liquid scintillator. The counter has been successfully used for measuring the neutron capture cross sections of Au-197, Ta-181 and Tm-169 on a 2.5 MeV pulsed Van de Graaff accelerator.  
        关键词：large liquid scintillation counter;fast neutron capture cross section   
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        发布时间：2022-09-13
      • Zhenxia Wang,Fuying Zhu,Wenbiao Chen,Dexin Cao,Zhengkai Bao,zuyao Zhou
        Vol. 09, Issue 9, (1986)
        摘要：The study of alloy and compound sputtering is very important to applications of material sputtering phenomena and to the theory of atomic collision. The surface layer compositional change of sample under sputtering is an interesting one of many sputtering phenomena. In order to observe this phenomenon and to study its characteristic, we selected the ternary alloy system Si(Co, Ta). The samples were sputtered individually with 20—80 keV Ar+ions. Then we studied how the surface large compositional change had depended on the energy of Ar+ ions.  
        关键词：Sputtering;ternary alloy;surface enrichment   
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        发布时间：2022-09-13
      • Mingzhu Shao,Shiyu Luo,Yansen Zhao
        Vol. 09, Issue 9, (1986)
        摘要：The damage produced in Si(Au)-detectors by ~14 MeV fast neutron irradiation has been studied. The I~V and C~V characteristic curves over wide range of irradiation doses have been tested; The damage coefficient and allowable flux of fast neutrons for silicon surface barrier detectors are introduced.  
        关键词：Neutron;Irradiation;Damage;Si (Au) -detector   
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        发布时间：2022-09-13
      • Dapei Ding,Naifeng Mao
        Vol. 09, Issue 9, (1986)
        摘要：A program TRANSPORT has been used to calculate and analyze the ion optical characteristics of the cyclotron beam transport system in Sichuan University. The results show that: i) the calculations agree with the performance in practice under the parameters operated now in this cyclotron; ii) if the geometry parameters are changed the field parameters will be adjusted moderately, the size of beam envelope in all lines will be decreased, the beam intensity reached the targets will be increased and the beam spot property on the targets will be better.  
        关键词：Cyclotron;Beam transport system;ion optical characteristics;program TRANSPORT   
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        发布时间：2022-09-13
      • Liangming Wang,Weidong Shi
        Vol. 09, Issue 9, (1986)
        摘要：A 10 ns pulsed beam transport system is designed, constructed and used. It is composed of a focusing device with magnetic quadrupole lenses, a magnetic deflector, a beam viewer, a beam tube adjuster, a 10 ns zero time system, a vacuum system and a target chamber. It has been used to determine the 0.72 MeV, 1.01 MeV, 1.21 MeV and 1.44 MeV neutron capture cross sections for Ta, Ga and Tm.  
        关键词：Mobley type magnet;three element magnetic quadrupole lenses;beam transport;10 ns zero time system   
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        发布时间：2022-09-13
      • Zhizheng Zhao,Jianmin Xiao,Yingxiang Guo,Zongyou Pan,Xiangguo Lei,Hongyie Liu,Xijun Sun
        Vol. 09, Issue 9, (1986)
        摘要：The principal problems of in beam γ-rау experiment technique are described. It includes some methods of reducing neutron and γ-rау background, design of beam collimater system, targets, target chamber and rotational table for measuring angular distributions and actual effect.  
        关键词：in beam γ-rау technique;beam collimater system;shield room;Doppler shift   
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        发布时间：2022-09-13
      • Yunlong Qian,Yougan Wang,Fugen Bao
        Vol. 09, Issue 9, (1986)
        摘要：The preliminary experiments on the removal of SO2 from gases by electron beam irradiation were completed. The results show that the rate of SO2 removal is proportional to the dose absorbed by the gases; and at the presence of NH3 the required dose for the same removal rate is reduced apparently. The products are the liquid of sulfur acid without NH3 and the powder of ammonium sulfate with NH3.  
        关键词：Electron beam irradiation;removal of SO2;Absorbed dose   
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        发布时间：2022-09-13
      • Haoyuan Shen
        Vol. 09, Issue 9, (1986)
        摘要：A new method of treating noise and breakdown phenomenon in transmission surface barrier detectors is reported. While a reverse bias is applied to the devices, the devices warm-up for short time and then cool down to room temperature, some may be recovered to normal characteristics. The result indicated that production rate of detectors were raised from 50—66% to about 80% by this method  
        关键词：surface barrier detector   
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        发布时间：2022-09-13
      • Qiliang Wang
        Vol. 09, Issue 9, (1986)
        摘要：FD-71 NaI(Tl) scintillation radiometer is a sensitive, simple and portable instrument. The characteristics for this radiometer are described in this paper.The detection capability of FD-71 radiometer is 0.5—500 µRh-1 for terrestrial gamma radiation. The differences of the readings between different instruments are generally within 5% and the differences in reproducibility and stability of different instruments are within 3% and 5%, respectively.  
        关键词：FD-71 scintillation radiometer 〔NaI (Tl) 〕;environmental;radiation flux range;Uniformity;reproducibility;Stability   
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        发布时间：2022-09-13
      • Huhou Li,Jingxin Sun,Yuqi Wang,Liangcai Lu
        Vol. 09, Issue 9, (1986)
        摘要：Contents of trace elements in the reference material of ancient ceramics (KPS-1)were determined by means of activation analysis, using thermal neutron irradiation produced in nuclear reactor. The KPS-1 favoured the analysis of ancient ceramics because it had not only many kinds of element but also appropriate contents of composition. The values presented here are reliable within the experimental precision, and have shown that the reference material had a good homogeneity. So the KPS-1 can be used as a suitable reference material for the ancient ceramics analysis.  
        关键词：ancient ceramics;reference material;Neutron activation analysis   
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        发布时间：2022-09-13
      • Zongzhi Huang,Hongdi Zhou
        Vol. 09, Issue 9, (1986)
        摘要：A method of trace element analysis by ICP-AES in serum from animals fed with irradiated food is described. In order to demonstrate that irradiated food is suitable for human consumption, it is necessary to perform an experiment of animal feeding with these food before use for human. Trace element analysis in animal serum could provide an actual evidence for further humen consumption study.53 serum samples of the rats fed with irradiated food were obtained. After ashed and solved, ICP-AES analysis has been used for determining 20 trace elements in specimen solution. The detection limitations are in the range of 10-2—10-3 ppm for different elements. The recoverys of elements are from 70.08% to 98.28%. The relative standard deviations are found to be 0.71% to 11.52%.  
        关键词：irradiated food;serum from animals;ICP-AES analysis   
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        发布时间：2022-09-13
      • Wenxiu Shen,Jianhuan Zhu,Kezhong Li,Xiangrui Guan,Jianping Li,Weigang Li
        Vol. 09, Issue 9, (1986)
        摘要：The sensitivities and absorption spectra of two kinds of radiochromic dye cyanide —hexahydroxyethyl pararosaniline(HPR-CN)and pararosaniline cyanide(PR-CN)syn-thesised in our own laboratory are identified spectrophotometrically. The results show that the dosimetric characteristics of HPR-CN are nearly the same as of the product of Far West Technology Inc., U.S.A.. The gamma ray responsibilities of these two radiochromic dye cyanide dosimeter solutions are evaluated.  
        关键词：radiochromic dye cyanide dosimeter;gamma ray dosimetry;hexahydroxyethyl pararosaniline cyanide;pararosaniline cyanide   
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        发布时间：2022-09-13
      • Guoping Fan,Rongzhen Cao
        Vol. 09, Issue 9, (1986)
        摘要：Tritiated L-arginine was prepared by catalytic exchanging in tritiated aqueous medium. The tritiated water of high activity was prepared by the reaction of PtO2 and tritium gas in acetic acid medium. The mixture of L-arginine, solid catalyst(10% Pd/C)and acetic acid containing tritiated water was sealed in a small glass vessel, then heated at 120℃ for 6h. After reaction, the tritiated water and acetic acid as well as catalyst were removed. The crude product was purified by paper chromatography. The specific activity of the product was 778mCi/mmol (28.8GBq/mmol) with radiochemical purity over 96%.  
        关键词：Tritium;3H-L-arginine   
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        发布时间：2022-09-13
      • Jixian Zhang,Shengguo Zhang,Chengmo Zhu,Zhenduo Tang
        Vol. 09, Issue 9, (1986)
        摘要：This paper reported a new scintigraphy for 36 patients with enterogastric bile reflux, and 18 patients with obstructive jaundice. 99mTc-EHIDA scintigraphy used in evaluation of diagnosis of two kinds of patients were discussed. 20 of 36 patients with enterogastric bile reflux appeared positive results which associated with severe symptoms and pathological changes. It was sure that this method is useful in diagnosis of patients with enterogastric bile reflux. In addition, we discussed this method used in differential diagnosis of obstructive jaundice. Our studies appeared that this method is a simple, safe, non-invasive and highly physiological.  
        关键词：enterogastric bile reflux   
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        发布时间：2022-09-13
      • Jiazhi Xia,Tianxi Hu
        Vol. 09, Issue 9, (1986)
        摘要：In this report, the amounts of 3H-TdR incorporated into the ascites tumour cells were used as index to study the effects of X-ray, cytosin arabinoside, microwave and combination factors of two or three on DNA synthesis. The results showed that DNA synthesis of ascites tumour cells was inhibited by these factors respectively. The destructive effects were enhanced by combination factors, with three combination factors as the best. The report also probed into the mechanism of three physical and chemical factors damaging on ascites tumour cells.  
        关键词：ascites tumour cells;DNA synthesis;soft X-ray cytosin arabinoside;microwave   
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        发布时间：2022-09-13
      • Qizhong Mo,Jun Fang,Bin Gong,Jumei Wang,Xuping Qian,Xingwei Kuang,Rong Chen,Bohui Wu
        Vol. 09, Issue 9, (1986)
        摘要：This paper describes labelled-iodine radioimmunoassay for the cyclic AMP. Preparations of antigen, antibody, radioligand were described. A simple high sensitive method for the assay of cyclic AMP was presented. The separation of bound from free labelled compound was performed by the second antibody method.The cross-reactivity of this cyclic AMP antiserum with cyclic GMP, ATP and GTP were 0.01%, 《3.1×10-5% and 3.8 × 10-5% respectively.The assay is sensitive to 1.5 mol cyclic AMP pertube. Recovery of the method is 99.1±9.0% and variety coefficient in batch is 2.7%.Cyclic AMP content in the plasm of normal man is 23.1±7.7 pmol/ml.  
        关键词：125I-labelled-radioimmunoassay;determination of the cyclic AMP;preperations of antigen and antibody   
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        发布时间：2022-09-13
      • Dengren Xu,Sichuan Chen,Wenzhou Pan,Jian Yang,Wuxun Tian,Tongsui Liu,Shanyin Zhao,Quanfa Wen
        Vol. 09, Issue 9, (1986)
        摘要：rCBF was measured by 133Xe inhalation technique in 106 normal adults, 22 patients of functional headache and 22 patients of ischemic cerebral vascular disease. The total normal rCBF values (M±SD) were 63.2±7.7 ml/(min•100g) for the left and 63.4± 8.2 ml/(min•100g) for the right. The normal values of age over forty were 59.2± 6.3ml/(min•100g) for left and 60.2±7.1 ml/(min•100g)for right. The rCBF values of functional headache were 67.4±7.1 ml/(min•100g) for the left and 67.2±5.3 ml/(min•100g) for the right. In ischemic cerebral vascular disease the rCBF values were 45.6±9.2 ml/(min•100g) for the left and 47.0±8.4 ml/(min•100g) for the right. Acco rding to the level of rCBF the 22 patients of ischemic cerbral vascular disease were divided into three groups, and discussed. The ligusticum(Chuanxiong) can raise rCBF. The rCBF was raised significantly in 6 cases after giving ligusticum intramuscularly.  
        关键词：133Xe;rCBF;Ischemic cerebral vascular disease   
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        发布时间：2022-09-13
      • Puling Liu,Yaqi Li,Tianqing Qi
        Vol. 09, Issue 9, (1986)
        关键词：one by one channel least square method;Natural radioactivity;sensitivity and precision;Soil   
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        发布时间：2022-09-13
      • Yijian Chen
        Vol. 09, Issue 9, (1986)
        关键词：AMS targets for 14C dating;C- ions conversion efficiency of target;residual background and contamination   
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        发布时间：2022-09-13
      • Shizhen Wang
        Vol. 09, Issue 9, (1986)
        关键词：computer tomography;nuclear magnetic resonance imaging;positron emission tomography;medical cyclotron   
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        发布时间：2022-09-13
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