最新刊期
      卷 0 ， 期 0 ， 2020
      • HE Bo1 XIONG Yonghong2 XIONG Caoshui2 HE Hongtao1 WEI Shiqiang1 1
        Issue 8, (2003)
        摘要：The local structures of mechanically alloyed Cu-Sn mixtures have been investigated by X-ray absorption fine structure (XAFS) technique. The result indicates that the bond length of the Cu-Cu first shell slightly increases and the coordination number of the Cu-Sn first shell largely increases with the milling times for the Cu-Sn alloys. This means that the inter-diffusion between Cu and Sn grains, driven by mechanical alloying, results in forming Cu-Sn alloy. After milling 4h, the coordination number and the bond length of the Cu-Cu first shell change from 12 to 7.4 and from 2.55 ?to 2.60 ?for the Cu-Sn alloys, respectively. After 12h milling, the coordination number of the Cu-Cu first shell decreases to 6.4 while that of the Cu-Sn first shell increases to 5.1 and its bond length is about 2.80 for the Cu-Sn alloy. Furthermore, the XAFS result for the Cu-Sn alloy milled for 72 h is similar to that for 12 h. This implies that the inter-diffusion between Cu and Sn grains has nearly reached the equilibrium and an amorphous Cu-Sn alloy of Cu6Sn5-like is formed.  
        关键词：XAFS;Mechanical alloying;Cu-Sn alloy   
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        发布时间：2021-03-12
      • SUN Xiaoying DAI Zhimin LIU Guimin
        Issue 8, (2003)
        摘要：The development of magnet database system of Shanghai Synchrotron Radiation Facility (SSRF) com-prises design and realization of the database as well as the realized function. The SSRF magnet database consists of tables to store magnet physics design parameters, magnet field quality measurement data, alignment measurement data, installation information and power supply data. The system plays an essential role in assuring magnet quality, analyzing magnet field and alignment error impact on installation properties, helping assembly alignment of magnet, and testing and running the installation.  
        关键词：Synchrotron radiation facility;Magnet;Database system   
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        发布时间：2021-03-12
      • WU Shuang GU Yuehua ZHAO Ling LIU Jiajuan
        Issue 8, (2003)
        摘要：After wheat seeds were irradiated with different doses of synchrotron radiation (SR) (soft X-rays), the biological effects on the germination rate, the membrane lipids peroxidation product of cells and the activities of some related enzymes were studied. Results showed that with the increase of the SR dose (within the range of 72—216 J·cm-2 ), the germination rate of the wheat seeds rised, but reduced rapidly when the dose beyond 216 J·cm-2; MDA, the peroxidation product of membrane lipids, rised with the SR dose (within 72—216 J·cm-2 ); and that the relative enzymes, such as SOD, CAT and POD, didn抰 increase stably with the rise of MDA. Moreover, the changes of their activities were` not simultaneous though the activity of APX and the content of chlorophyll in treated-group were lower than those in control group all along. Mechanism of the effects was discussed as well.  
        关键词：Synchrotron radiation(SR);Soft X-ray;Wheat cells;Soluble proteins;Peroxidation product of membrane lipids;Chlorophyll;Protective enzymes system   
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        发布时间：2021-03-12
      • ZHANG Tonghe WU Yuguang LIU Andong ZHANG Xu WANG Xiaoyan
        Issue 8, (2003)
        摘要：The properties of corrosion resistance for C and W dual-implanted H13 steel were studied using multi-sweep cyclic voltammetry. The corrosion morphologies were investigated by scanning electron microscopy (SEM). The results show that after corrosion for 30 voltage scanning-loops, serious corrosion morphology appears on the surface of H13 steel: dense corrosion pits are distributed on the surface. Both shape and distribution morphology of these pits indicate the crystal proper-ties: some pits are triangle or rectangle, and the pits are located along grain boundaries. But after corrosion of the W and C dual implantated steel samples, surface corrosion pits are shallow and small. Shallow corrosion pits are dislocated random, their shape and distribution are not provided with crystal properties. When the fluence is increased and after corrosion for 88 voltage scanning-loops, the surface corrosion pits are still shallow and small, showing the corrosion resistance to be enhanced further. Finally the mechanism of corrosion resistance was discussed.  
        关键词：Carbon and tungsten dual implantation;H13 steel;Corrosion resistance mechanism;Multi-sweep cyclic voltammetry CLC TN305.3   
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        发布时间：2021-03-12
      • LI Guangsheng LI Daming CHEN Xilin PENG Chaohua YANG Yi WEN Shuxian BAO Jie YUAN Guanjun YANG Zhihong ZHANG Shengdong CUI Anzhi
        Issue 8, (2003)
        摘要：Emission Probabilities for the low-energy γ-rays following the decay of 161Tb were measured precisely by using a 4疴-γ coincidence apparatus and low-energy photon spectrometer. Determined results are 0.2327 0.0053, 0.1700 0.0031 and 0.1001 0.0019 for the 25.7, 48.9 and 74.6 keV γ-rays,respectively. The uncertainty of the present measurement has been considerably decreased as compared with previous data.  
        关键词：ray emission probability;4疴-γ coincidence;Low-energy photon spectrometer   
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        发布时间：2021-03-12
      • ZHAO Weijuan1 LI Rongwu2 GAO Zhengyao1 LI Guoxia1 XIE Jianzhong1 HAN Guohe 1 FENG Songlin3 FAN Dongyu3 ZHANG Ying3 CAI Zhifang3 ZHANG Zhongli4 ZHU Junxiao4 1
        Issue 8, (2003)
        摘要：Terracotta Warriors and Horses in Qin Shihuangs Mausoleum are famous in the world, but the provenance of their raw materials is still a puzzle up to now. We collected 20 samples of pottery warriors and horses in Pit No.1, 20 clay samples from nearby regions and one sample of Yaozhou porcelain body, and the contents of 32 trace elements in these samples by neutron activation analysis (NAA). These data were processed by fuzzy cluster analysis, and the trend cluster diagram was obtained. The result showed that the Lishan clay may be considered as the origin of raw materials of the Terracotta Warriors and Horses in Qin Shihuangs Mausoleum, thus the kiln sites may also be located near the Qin憇 Mausoleum.  
        关键词：Raw materials provenance;Terracotta Warriors and Horses of Qin Shihuangs Mausoleum;Neutron activation analysis;Fuzzy cluster analysis   
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        发布时间：2021-03-12
      • LIU Shengkang ZHANG Zhiping GUO Dayong
        Issue 8, (2003)
        摘要：The response of the grease stain thickness in petroleum pipelines using the amplitude spectrum of the transmitted γ-ray was studied. The simulated experimental device consists of a collimating beam of 137Cs γ-ray and a collimating NaI(Tl)scintillation detector. The BH1224 multichannel spectrometer was used in the simulated experiment. The grease stain sample was from Xinjiang. The experimental result exhibited a very good linear relationship between the logarithm of the response and the grease stain thickness. The measuring accuracy of the grease stain thickness was 0.19 cm.  
        关键词：Petroleum pipeline;Grease stain thickness;γ-ray;Transmission;Amplitude spectrum   
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        发布时间：2021-03-12
      • SONG Wenjie
        Issue 8, (2003)
        摘要：While the RIBLL was being built in the experimental hall of HIRFL, nuclear physical experiments had to continue. By improving the shielding and strenthening the management, the personnel radiation safety was ensured. The safety measures taken and consequences were described in the paper.  
        关键词：RIBLL;Building;Physical experiment;Safety implementation   
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        发布时间：2021-03-12
      • LUO Shishi WANG Zegang FENG Min MA Fei GE Cailin
        Issue 8, (2003)
        摘要：Leaves of rice and tobacco were irradiated by g-ray, and the dynamic change of electrical resistance and ion leakage of leaf tissue was studied. It is shown that, with the radiation dose rising, the leaf tissue electrical resistance for both plants rises firstly, and when the radiation dose exceeds a certain value, the resistance declines. But this change rule is different from the rule for ion leakage. And the method of measuring electrical resistance of leaf tissue can reveal the g-ray’s influence on plant more sensitively.  
        关键词：g-ray;Leaf tissue electrical resistance;Ion leakage;Biomembrane   
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        发布时间：2021-03-12
      • WEI Mengfu ZHANG Hailu ZHANG Lianping QI Honglian QI Lianzhu FEI Yue LIU Jidong
        Issue 8, (2003)
        摘要：The paper has presented a nondestructive analysis technique for the isotopic composition of uranium in the high radioactivity wastebins. A three-dimensional rotary sample holder was designed and made. A series of samples with total uranium quantity from 2g to 600g was measured by a coaxial HPGe detector, and gamma-rays from uranium isotopes in 120—1001keV were analyzed by PC/FRAM program. This technique provides an uncertainty of less than 0.6% for 235U in 20%—93% and that of less than 1.3% for 238U.  
        关键词：Uranium;Isotopic composition;Gamma-ray;Nondestructive analysis   
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        发布时间：2021-03-12
      • WANG Haobo1,2 GAO Xiuwu2 GU Yunhong1 CHENG Guowang1,2 YU Zengliang1 1
        Issue 8, (2003)
        摘要：Three kinds of watermelon seeds irradiated by Ar+ ion beam (25keV, 6.24×1016 ions/cm2) were inoculated in MS medium with 15mg/L FA. Cotyledons from the sterile seedling as explants were inoculated in MS+BA 2.0mg/L+FA 15mg/L. And the adventitious shoots of resistance to FA were cultured in MS+NAA 0.2mg/L+FA 15mg/L. The results showed that both the irradiation of Ar+ and FA affected the germination rate and seedling of watermelon line 3-27 and YH-5, and the joint effect of Ar+ and FA showed an enhanced restraint. The adventitious shoot and rootage induction rate from the seeds irradiated by Ar+ were respectively bigger than the unirradiated seeds in 3-27 and YH-5. The increasing ranges were different between two watermelon lines and between the shoot and rootage induction rates.  
        关键词：Watermelon;Low energy ion beam;Somatic cell;Resistance mutant   
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        发布时间：2021-03-12
      • ZHANG Huabei LI Bo QI Chuanmin DAI Mei GUO Xuefeng
        Issue 8, (2003)
        摘要：To explore the synthetic methods of phosphine mixed complexes of technetium-99m and look for new heart imaging agents, one N3S ligand (MVNE) and three phosphine ligands were synthesized. 99Tcm-MVNE prepared at room temparature through ligand-exchange reaction reacts with the three phosphine ligands respectively to obtain three mixed complexes of 99Tcm-MVNE-phosphine. The biodistribution studies in mice indicate that these complexes exhibit pretty high myocardial uptake and high blood clearance rate.  
        关键词：Myocardial perfusion imaging agents;99Tcm-phosphine mixed complexes;Heart uptake   
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        发布时间：2021-03-12
      • TANG Ganghua1 TANG Xiaolan2 LUO Lei1 1
        Issue 8, (2003)
        摘要：O-(2-18F-Fluoroethyl)-L-tyrosine (FET) and O-(3-18F-fluoropropyl)-L-tyrosine (FPT) were prepared by a two-step reaction. First, nucleophilic fluorination reaction of 18F-fluoride with 1,2-di (4-methylphenylsulfonyloxy) ethane (TsOCH2CH2OTs) and 1,3-di(4-methylphenylsulfonyloxy) propane (TsOCH2CH2CH2OTs) gave 2-18F-1-(4- methylphenylsulfonyloxy) ethane (18FCH2CH2OTs) and 3-18F-1-(4-methylphenylsulfonyloxy) propane (18FCH2CH2CH2 OTs), respectively. Then, 18F-fluoroalkylation of L-tyrosine di-sodium salt formed FET and FPT respectively, with the whole synthesis time of less than 90 min. Purification of resultant FET and FPT by acetonitrile precipitation gave an overall radiochemical yield of 4.7% and 8% with no decay correction, and purification by HPLC gave an overall radiochemical yield of 20% and 30% with no decay correction, respectively. The radiochemical purity of FET and FPT injection was above 95%, and all quality parameters met the quality requirements of radiopharmaceuticals.  
        关键词：O-(2-18F-Fluoroethyl)-L-tyrosine;O-(3-18F-Fluoropropyl)-L-tyrosine;Synthesis;Quality control   
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        发布时间：2021-03-12
      • WANG Weidong1 CHEN Shaoliang1 XU Lanwen2 SHI Hongcheng1 XU Kaiping1 1
        Issue 8, (2003)
        摘要：A new method of preventing restenosis is the use of a liquid-filled balloon containing a beta-emitting radionuclide. Rhenium-188 is one of the most common used radionuclides. In order to reduce the injury caused by high dose radioactivity in the event of balloon rupture, we have succeeded in preparing the 188Re-DTPA compound because DTPA can be excreted from kidney rapidly. The labeling methods and conditions were described. The yield of 188Re-DTPA was more than 90%. The biodistribution studies of 188Re-DTPA and 188Re perrhenate showed that radioactivity levels of 188Re perrhenate in the thyroid gland and stomach were higher than that of 188Re-DTPA, and the excretion of 188Re-DTPA was much faster than that of 188Re perrhenate. Data of the estimated absorbed doses of various tissues in rats using software of MIRDOSE showed the same results. The thyroid radiation values in the 188Re-DTPA group and 188Re perrhenate group were 0.041 and 0.563nGy / Bq, respectively. And the stomach radiation values were 0.043 and 0.118nGy / Bq, respectively. Our study therefore suggested that 188Re-DTPA was superior to 188Re perrhenale for use in endovascular brachytherapy.  
        关键词：Endovascular brachytherapy;188Re-DTPA;188ReO4-;Radiation dose   
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        发布时间：2021-03-12
      • TIAN Haibin YIN Duanzhi ZHANG Lan ZHANG Chunfu LI Junling ZHOU Wei WANG Yongxian
        Issue 8, (2003)
        摘要：L-750,667 is a novel, high-affinity (Ki = 0.51 nmol/L) and selective D4 receptor ligand. A L-750,667 analogue, 3-{[4-(4-[18F]fluorobenzyl)]piperazin-1-yl}methyl-1H-pyrrolo[2,3-b]pyridine, was prepared by reacting 3- (piperazin-1-yl)-methyl-1H-pyrrolo[2,3-b]pyridine with 4-[18F]fluorobenzaldehyde. The 4-[18F] fluorobenzaldehyde was prepared by nucleophilic substitution using no carrier added [18F]fluoride from trimethylammonium- benzaldehyde triflate in DMSO. The radiochemical yield of 3-{[4-(4-[18F]fluorobenzyl)] piperazin-1-yl}methyl-1H- pyrrolo[2,3-b]pyridine was 12.0% (decay –corrected) with a radiochemical purity better than 98% and a specific activity greater than 37GBq/mmol, and the synthesis time including HPLC purification was 73 min. This labeled compound may be a useful PET tracer for dopamine D4 receptors.  
        关键词：Fluorine-18;7-azaindole analogue;Dopamine D4 receptor;PET;Radiosyntheses   
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        发布时间：2021-03-12
      • WU Zhaozhong WU Boyi LIN Wei WEI Xueli WU Hengfu FAN Ziwen OUYANG Zhi WU Changwei YUAN Gewen
        Issue 8, (2003)
        摘要：The purpose of this study was to assess the diagnostic value of scans with 99Tcm(V)-dimercaptosuccinic acid (DMSA) to localize bone metastases and to evaluate the capability to diagnose bone/joint infections with scans using 99TcmCitrate. Eighteen patients referred to bone metastases and eighteen patients referred to bone and joint in-fection were studied. In all patients, a bone scan of 99TcmMDP was obtained initially. Subsequently, comparative scans with 99Tcm (V)DMSA and 99TcmCitrate were conducted successively. Pathologic finding and/or microbi-ological finding, X-ray CT and /or MRI, and /or clinical follow-up (until symptoms disappeared) were considered to be proof of the presence of bone metastases and bone/joint infection. All of the eighteen patients with diagnosed bone metastases and of the eighteen patients with diagnosed bone and joint infection had positive 99TcmMDP scintigraphy. The fifteen patients with diagnosed bone metastases and the fifteen patients with diagnosed bone/joint infection had increased 99Tcm(V) DMSA accumulation at certain areas matched with those shown in 99TcmMDP scans, and only one patient with diagnosed bone metastases and the fifteen patients with diagnosed bone and joint infection had in-creased 99TcmCitrate accumulation at certain areas matched with those shown in 99TcmMDP scans. 99TcmMDP scans show 64 bone lesions in the bone metastases while 49 lesions by the 99Tcm(V) DMSA scans and only one le-sion by the 99TcmCitrate scans respectively. And 99TcmMDP scans show 22 bone lesions in the bone and joint infec-tion while 17 lesions by the 99Tcm(V) DMSA imaging and 16 lesions by the 99TcmCitrate imaging respectively. For bone metastases diagnosis, the sensitivity of 99Tcm(V) DMSA imaging and 99TcmCitrate imaging were 76.56% and 1.56%, respectively, and the specificity were only 22.73% and 27.27%, respectively. For bone and joint infection di-agnosis, the sensitivity of two kinds of imaging were 77.27% and 72.73%, respectively, and the specificity were 23.44% and 98.44%, respectively. Therefore, we should be cautious in the differentiating diagnoses of bone metasta-ses and bone/joint infection using99Tcm(V) DMSA imaging, for 99Tcm(V) DMSA scan actually could not discrimi-nate the malignant from the benign. On the other hand, 99TcmCitrate scan showed a higher specificity for detecting bone and joint infection as compared with 99TcmMDP scan and 99Tcm(V) DMSA scan.  
        关键词：Bone malignant tumor;Bone and joint infection;Radionuclide 99Tcm imaging;MDP;DMSA;Citrate   
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        发布时间：2021-03-12
      • LI Junling WANG Yongxian ZHANG Xiuli ZHOU Wei LIN Yingwu YIN Duanzhi
        Issue 8, (2003)
        摘要：The application of biologically active peptides labeled with positron-emitting nuclides has emerged as a useful and interesting field in nuclear medicine. Among a number of positron-emitting nuclides, fluorine-18 appears to be the best candidate for labeling peptides by virtue of its favourable physical and nuclear characteristics. Small peptides are currently the preferred reagents over proteins and antibodies for dignostic imaging, and the 18F-labelled peptides hold enormous clinical potenial . This review presents the recent progress in 18F-labelled small active pep-tides. In addition, different 18F labeling reagents, radiofluorination techniques and pharmacokinetics of 18F-labelled bioactive peptides are described.  
        关键词：Positron-emitting nuclides;Bioactive peptides;18F labeling reagents;Radiofluorination techniques;Pharmacokinetics   
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        发布时间：2021-03-12
      • SUN Punan
        Issue 8, (2003)
        摘要：A new type nuclear device for measuring the oil-water interface level as well as the total liquid level was presented. A series of new methods, such as non-linear fitting of the level, automatic compensations for the deviation caused by the decay of radioactive source, the medium’s temperature, etc., were employed. Comparing with other non-nuclear techniques, this device has the following advantages: non-contact surveying, anti-interference of paraffin wax coagulating and a little of repairing. The measuring range is 0—200cm for total liquid level and 0—100cm for oil-water interface level respectively. The measurement precision is 1% for total liquid level and 2% for the interface level respectively. The respond time is ≤10s, the long time stability ≤ 0.5% FS / 48h and the temperature influence ≤0.01% FS /℃. The gauge can be used in surveying oil-water interface level and total liquid level in oil-water separation tanks on oil fields. It is also suitable to measure the interface level of two kinds of liquids as well as the total liquid level in various storage tanks.  
        关键词：Oil-water interface level;Total liquid level;Nuclear level gauge   
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        发布时间：2021-03-12
      • QU Guopu GUO Lanying XU Shaoyi
        Issue 8, (2003)
        摘要：This paper introduces a Ca / Fe XRF analyzer specially designed for the purpose of teaching the related courses on nuclear engineering and nuclear technology in the university. Both working principle and constitution of the instrument are presented. A comparison between XRF analysis and chemical analysis showed that the two results were in agreement with an error of ±0.7%.  
        关键词：X-ray fluorescence analysis;Ca / Fe analyzer;Nuclear technology   
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        发布时间：2021-03-12
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