最新刊期
      卷 0 ， 期 0 ， 2020
      • FENG Gan ZHENG Xinhe WANG Yutian YANG Hui LIANG Junwu
        Issue 10, (2002)
        摘要：The GaN layer grown by epitaxial lateral overgrowth on sapphire (0001) has been investigated by synchrotron X-ray diffraction. The results show that ELO GaN stripes bend towards the SiN x mask in directions perpendicular to the stripe direction. This lead to the GaN (0001) crystal planes in the ’ wings’ (overgrown GaN) exhibit crystallographic tilts away from those in the ’ window’ (seed) regions. The GaN (0002) diffraction was used to determine the grain sizes in the wing region and window region, respectively. It is found that the grain size in the wing region increases about three times comparing to those in window region.  
        关键词：GaN;Epitaxial lateral overgrowth;Crystallographic tilt;Grain size;Synchrotron X-ray diffraction   
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        发布时间：2021-03-12
      • WANG Yong JIA Haiqiang WANG Wenchong LIU Cuixiu CHEN Xiangming MAI Zhenhong
        Issue 10, (2002)
        摘要：The Changes of compositions and microstructures of GaAs/AlAS/GaAs trilayers before and after oxidation were investigated. GaAs/Al 2O 3/GaAs thin film was obtained from GaAs/AlAs/GaAs by lateral oxidation and its microstructures were investigated by use of X-ray small angle reflectivity and high angle diffraction. The results show that before oxidation there exists an even transition layer with the thickness of 110 between the AlAs layer and the upper GaAs layer. The AlAs layer was separated into two layers, one is of 40 thickness and the other 1050. The average atomic density of the thin AlAs layer is less than that of the thick AlAs layer. After lateral oxidation, AlAs was oxidized into Al 2O 3, and the thickness and roughness of the transition layer metioned above decrease.  
        关键词：GaAs/AlAs/GaAs;Oxidation;Microstructure   
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        发布时间：2021-03-12
      • SHEN Xiansheng SUN Hao
        Issue 10, (2002)
        摘要：By means of SR X-ray fluorescence, we have studied the heavy elements in leaves for 8 species of plants in Zhongshan mine, Anhui province. These plants are Pteridium aquilinum var. latiusculum, Polygonum cuspidatum, Rumex acetosa, Medicago hispida, Viola yedoensis, Eupatorium japonicum, Erigeron annuus and Taraxacum mongolicum . The results of experiments are that the content of Fe element in Eupatorium japonicum is the highest, and the lowest one is in Taraxacum mongolicum . The sequence of the abundance of Fe element from high to low is Eupatorium japonicum, Rumex acetosa, Medicago hispida, Polygonum cuspidatum, Pteridium aquilinum var. latiusculum, Viola yedoensis, Erigeron annuus and Taraxacum mongolicum . The content of K element in young leaf of Rumex acetosa is about 7 times, and the one of Fe element is 1.5 times, respectively, as high as that in functional leaf. The contents of Fe element of Medicago hispida and Taraxacum mongolicum in iron mine region are 5 times and about 7 times, respectively, as high as that in non-mine region.  
        关键词：Anhui province;Iron mine;Plant;Heavy element;X-ray fluorescence   
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        发布时间：2021-03-12
      • HE Hong 1 LIANG Hongbin 2 WANG Shubin 1 SU Qiang 1,2 TAO Ye 3 JU Xin 3 HOU Xueying 3 1
        Issue 10, (2002)
        摘要：UV-VUV excitation spectra and emission spectra under UV excitation of SrAl 2B 2O 7:Dy 3+ ,BaAl 2B 2O 7:Dy 3+ ,SrAl 3BO 7:Dy 3+ ,La 2CaB 10 O 19 :Dy 3+ are investigated. Yellow-to-blue intensity ratios ( Y/B ) of Dy 3+ emission in these hosts are discussed. The f-d transition of Dy 3+ , charge transfer state (CTS) and host absorption in VUV excitation spectra are assigned.  
        关键词：Dy 3+;VUV;Borate;Luminescence   
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        发布时间：2021-03-12
      • CHEN Yonghu 1 SHI Chaoshu 1 WEI Yaguang 1 TAO Ye 2 1
        Issue 10, (2002)
        摘要：Synchrotron radiation source was used to investigate the spectral characteristics of Gd 2SiO 5:Eu 3+ in VUV-UV range. The various energy transfers at room temperature and 10K, including from host or Gd 3+ ions to Eu 3+ ions and transfer between Eu 3+ ions at two different lattice sites, were discussed. In addition the emission spectra under 186nm and 276nm excitation were compared from the view of quantum cutting. The results indicate that Gd 2SiO 5:Eu 3+ is a kind of material with potential high efficiency quantum cutting.  
        关键词：Gd 2SiO 5:Eu 3+;Energy transfer;Quantum cutting   
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        发布时间：2021-03-12
      • WU Chunxue 1,3 HUANG Yuying 2 YANG Chun 1 LI Jing 1 HE Wei 2 YU Zhenwei 3 LIN Kexiang 1 LI Kuifa 1 1
        Issue 10, (2002)
        摘要：The experimental device and methods of nondestructive analysis on individual fluid inclusion by synchrotron radiation X-ray fluorescence microprobe are described. With the standard sample NIST612 as reference, the detection limits of some elements are calculated and the typical organic inclusions taken from the western basin of China which contain oil gas are analyzed nondestructively. The semi-quantitative detection results of K, Ti, V, Cr, Mn, Ge, Co, Ni, Cu, Zn, Rb, Sr, Y, Zr, Ba, Pb etc. are given, and the application of the results in oil geology is discussed.  
        关键词：Synchrotron radiation;X-ray fluorescence microprobe;Individual fluid inclusion;Nondestructive analysis;Trace element   
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        发布时间：2021-03-12
      • TAN Weishi SHA Hao SHEN Bo CAI Hongling WU Xiaoshan JIANG Shusheng
        Issue 10, (2002)
        摘要：Modulation-doped Al x Ga 1- x N/GaN heterostructures with various thickness of Si-doped n-Al 0.22 Ga 0.78 N barrier (n-AlGaN) were deposited on (0001)-oriented sapphire (α-Al 2O 3) by MOCVD. The reciprocal space mappings (RSMs) of symmetric reflection (0002) and asymmetric reflection (1014) were measured with the methods of high resolution X-ray diffraction (HRXRD). The results indicate that the microstructure and strain status of barrier correlate to those of the i-GaN layer. The strained barrier starts to be relaxed while its thickness is larger than 750 and the critical thickness t c is larger than 500. The barrier holds an "abnormal" relaxation status, which probably results from the internal defects of n-AlGaN and the strain relaxation status at the i-GaN/α-Al 2O 3 interfaces.  
        关键词：Al x Ga 1- x N/GaN heterostructure;High resolution X-ray diffraction;Microstructure;Strain;Relaxation line model   
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        发布时间：2021-03-12
      • ZHANG Peng 1 GUO Minghuan 2 1
        Issue 10, (2002)
        摘要：Based on the study of the algebraic reconstruction techniques (ART) and the fan beam interpolative algebraic reconstruction techniques (FIART), two novel algorithms to reconstruct high resolution CT image from overlapped low resolution fan beam projection data are presented. One of the algorithms is called fan beam virtual detector algorithm, and the other is called fan beam direct reconstruction algorithm. Some simulation results are shown and analyzed.  
        关键词：Computed tomography;Overlapped sampling;Interpolative algebraic reconstruction techniques;Low resolution fan beam projection data;High resolution CT image   
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        发布时间：2021-03-12
      • GUO Hongxia HAN Fubin CHEN Yusheng ZHOU Hui HE Chaohui
        Issue 10, (2002)
        摘要：Experimental results of X-ray dose enhancement effects are given for CMOS4069 and floating gate ROMs irradiated in Beijing Synchrotron Radiation Facility and in cobalt source. Shift of threshold voltage vs. total dose for CMOS4069 and the errors vs. total dose for 28f256 and 29c256 have been tested on line and the equivalent relation of total dose damage under the same accumulated dose is provided comparing the response of devices irradiated by X-ray and γ-ray source. These results can be provided for X-ray radiation hardening technology as an effective evaluation data.  
        关键词：CMOS;EEPROM;X-ray;Dose enhancement effects;Synchrotron radiation   
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        发布时间：2021-03-12
      • CHEN Dapeng YE Tianchun XIE Changqing LI Bing DONG Lijun XU Xingcai ZHAO Lingli HAN Jingdong
        Issue 10, (2002)
        摘要：Lithography technique has been the key point to push forward the USL fabricator. X-ray lithography (XRL) is one of the next generation lithography techniques (NGL), which has the probability of industrialization. The mask technique is the crux cell. This paper reports the latest development of XRL and mask fabricator technique in BSRF.  
        关键词：Lithography;X-ray lithography;NGL;Mask   
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        发布时间：2021-03-12
      • LEI Yong FENG Songlin XU Qing FENG Xiangqan FAN Dongyu ZHANG Ying SHA Yin CHENG Lin HUANG Yuying HE Wei
        Issue 10, (2002)
        摘要：Sancai (Tri-color pottery) of Tang Dynasty is a kind of glaze pottery. The Sancai is famous for its distinctive color in China. The compositional differences among those kinds of kilns’ Sancai haven’ t been studied until now. In this work, SRXRF was used to analyze the specimens of two important Sancai kilns, i.e. Huangye and Huangbu kilns and to study the compositional differences among the two kinds of samples in the body. The contents of K, Rb, Sr, Zn and Zr in the body from Huangye kiln’s are higher than those from Huangbu kiln’ s, contrary to the body contents of Ti, Mn, Fe and Y. Cr contents in both of the kilns’ samples are comparable. The study contributes much to characterization study and provenience study of different kinds of Sancai of Tang Dynasty.  
          
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        发布时间：2021-03-12
      • FENG Xiangqian FENG Songlin XU Qing ZHANG Ying LEI Yong FAN Dongyu CHENG Lin HUANG Yuying HE Wei
        Issue 10, (2002)
        摘要：samples were chosen from the fine white porcelain sherds excavated in Xing, Ding and Jingxing kilns of Hebei province. Their bodies and glaze were analyzed for 19 elements by SRXRF, followed by the cluster analysis and principal factor analysis. The statistical results show that porcelains of each kiln are classified as one class according to their elemental composition. It indicates that provenance of the fine white porcelains may be identified based on their chemical components.  
        关键词：Fine white porcelains;SRXRF non-destructive analysis;Discriminating criteria   
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        发布时间：2021-03-12
      • FAN Dongyu FENG Songlin FENG Xiangqian LEI yong XU Qing HUANG Yuying HE Wei
        Issue 10, (2002)
        摘要：elements of eighty ancient celadon samples were analyzed by using synchrotron radiation X-ray fluorescence (SRXRF). V, Ni, Zn and Mn display variable dynastic orderliness. Results of statistic analysis show that Yue kiln ancient celadon has distinctively born character on different dynasty and kiln. The statistic analysis results of SRXRF and NAA are similar.  
        关键词：Yue kiln ancient celadon;SRXRF;Statistic analysis   
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        发布时间：2021-03-12
      • ZHAO Hui DONG Baozhong
        Issue 10, (2002)
        摘要：The thickness of transition layer of crystal polymer is generally calculated by one dimensional electron density correlation function. If the transition layer of crystal polymer is diffusive, corrected Porod’s law is an effective method to deal with diffuse transition layer of pseudo two-phase material. The method of Porod’s law is used to compute the thickness of transition layer of crystal polymer and compared with the result of correlation function method. The conclusion is that two methods obtain identical thickness of transition layer.  
        关键词：Small angle X-ray scattering;Crystal polymer;Thickness of transition layer;Correlation function;Porod’s law   
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        发布时间：2021-03-12
      • MA Yanming 1,2 MA Hongan 2 PAN Yuewu 2 CUI Qiliang 2 LIU Bingbing 2 CUI Tian 2 ZOU Guangtian 2 LIU Jing 3 WANG Lijun 1 1
        Issue 10, (2002)
        摘要：Diamond anvil cell (DAC) is adopted to carry out in situ high pressure measurements for Y 2O 3 powder sample in the range from ambient to 23GPa, by using synchrotron X-ray diffraction method. Two structural phase transitions were observed in the pressure range. At P =12.8GPa, Y 2O 3 transforms from cubic to monoclinic structure. At P =21.8GPa, Y 2O 3 transforms from monoclinic to another new phase. However, the crystal structure of the new phase cannot be determined, because the diffraction pattern of the sample disappears. The decompressed sample is monoclinic structure, indicating that the first pressure-induced phase transition is irreversible.  
          
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        发布时间：2021-03-12
      • WEI Risheng 1 AN Lizhi 1 ZHANG Jing 1 ZHANG Fengyun 1 FENG Zhihui 1 ZHANG Sunxi 1 HUANG Yuying 2 HE Wei 2 1
        Issue 10, (2002)
        摘要：By using Synchrotron radiation X-ray fluorescence (SRXRF) micro-probe, the relative levels of intracellular important elements (such as K, Ca, Fe, Ni, Cu, Zn, La) in single smooth muscle cell of rat under the actions of 10 -8 mol/L La(NO 3) 3 within 4h, 8h and 24h, were detected respectively. The changes of intracellular important elements distribution in single smooth muscle cell were observed. The accumulation of La 3+ in cell, causing the change of intracellular important elements distribution, is one of the mechanisms of biological effect of rare earth element (REE) in cells.  
        关键词：SRXRF micro-probe;La(NO 3) 3;Smooth muscle cell   
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        发布时间：2021-03-12
      • ZHU Jian MAO Zhenwei YANG Yimin FENG Min WANG Changsui
        Issue 10, (2002)
        摘要：The technique of the SRXRF line scan analysis was used to measure contents of 11 elements at the broken plane of the Ru porcelain from porcelain glaze to body. It is found that there exists a great different layer of contents of elements between the porcelain glaze and body. The mechanism may be that in the process of firing the porcelain, materials of glass-glaze of porcelain glaze infiltrate into the surface of porcelain body, that could fit the phenomenon of observation by different microscopes (stereomicroscope, polarizing microscope and scanning electron microscope).  
        关键词：SRXRF;Ru porcelain;Line scan analysis;Midst layer   
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        发布时间：2021-03-12
      • CHEN Zhigang 1,2 IBRAHIM Kurash 2 DONG Yuhui 2 WU Ziyu 2 WEI Long 3 WANG Yutian 3 WANG Yunbo 1 Yu Jun 1 1
        Issue 10, (2002)
        摘要：LaFe 1- x Cr x O 3 systematic compounds were prepared by Cr 3+ doping into the end component LaFeO 3. The crystal constants have been evaluated by using MarqX code. The analysis of the XRD data confirms that the perovskite compounds are in their single-phase state. We have also performed O 1s core-level photoemission experiments using photon energies above and below Fe 2p absorption edge, respectively, in order to investigate the crystal structure variation trend in terms of electronic structure. A preliminary conclusion has been drawn that the charge transfer amount from O 2p to Cr 3d varies regularly with the doping level of Cr 3+ in LaFe 1- x Cr x O 3.  
        关键词：Crystal structure;Photoelectron spectroscopy   
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        发布时间：2021-03-12
      • YANG Chun 1,2 HUANG Yuying 1 HE Wei 1 WU Chunxue 2 LI Kuifa 2 1
        Issue 10, (2002)
        摘要：The domestic and the international progress of analysis of single fluid inclusions by synchrotron radiation X-ray fluorescence in recent decades was reviewed. The estimation and correction method of the quantitative analysis of trace elemental concentration in single fluid inclusions were described. The application of single fluid inclusions in the petroleum geology field was also presented.  
        关键词：Single fluid inclusion;Synchrotron radiation;X-ray fluorescence   
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        发布时间：2021-03-12
      • ZHAO Guangjun 1 LI Tao 1 HE Xiaoming 1 XU Jun 1 TIAN Yulian 2 HUANG Wanxia 2 1
        Issue 10, (2002)
        摘要：The defects in Ce:YAlO 3 single crystals grown by Czochralski method were investigated by transmission white beam synchrotron radiation topography method. It was shown in experiments that the growth striations, inclusions precipitations, twins, core and dislocation group were the main growth defects in Ce:YAP single crystals. The mechanism of the defects formation was also discussed in the paper. The results showed that the doped concentration, purity of starting materials and growth conditions are the main causes for defects formation in Ce:YAP single crystals.  
        关键词：Scintillation crystals;Ce:YAP;Growth defects;White beam topography   
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        发布时间：2021-03-12
      • MA Hongan 1 JIA Xiaopeng 1 CUI Qiliang 1 PAN Yuewu 1 ZHU Pingwen 1 GUO Weili 1 CHEN Lixue 1 REN Guozhong 1 LIU Jing 2 ZOU Guangtian 1 1
        Issue 10, (2002)
        摘要：In situ high pressure energy dispersive X-ray diffraction experiments have been carried out on C 3N 6H 6 by using diamond anvil cell (DAC) device with synchrotron radiation source. Two structural phase transitions of C 3N 6H 6 have been observed within 14.7GPa pressure range, from monoclinic to triclinic structure at 1.3GPa and from triclinic to orthorhombic structure at 8.2GPa, respectively.  
        关键词：C 3N 6H 6;Structural phase transition;Synchrotron radiation;X-ray diffraction under high pressure   
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        发布时间：2021-03-12
      • LI Chunlin FU Yilu MENG Ming BIAN Guozhu
        Issue 10, (2002)
        摘要：Ni/CeO 2-ZrO 2-Al 2O 3 catalysts were prepared using hydro-thermal method. CO 2 reforming of CH 4 reactions were carried out with or without vapor. The amount of carbon deposit and the EXAFS of K-edge of Ni were measured. The result shows that the nearest Ni-Ni coordination distances do not change obviously, but the coordination numbers of the nearest Ni-Ni shell change obviously. The nearest Ni-Ni coordination number reduces largely after reaction without vapor. For the condition of accession of vapor, the nearest Ni-Ni coordination numbers reduce much smaller than that of without vapor. The accession of vapor can reduce the amount of carbon deposit, stabilize the Ni structure, and thereby increase the stability of CO 2 reforming of CH 4 reaction.  
        关键词：Hydrothermal synthesis method;CO 2 reforming CH 4;CeO 2-ZrO 2 solid solution;Ni catalyst;EXAFS;Addition of vapor   
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        发布时间：2021-03-12
      • GAO Yang 1,2 LI Mei 2 PENG Liangqiang 3 ZHANG Jufang 3 HUANG Junrong 3 1
        Issue 10, (2002)
        摘要：Based on the viewpoints of engineering applications of LIGA technology, essential design and fabrication challenges of Micro/Milli- safety combination lock mechanisms and Micro/Milli- acceleration switch are briefly presented. Demands and requirements of those two devices’ LIGA fabrication process are also outlined in the paper.  
        关键词：LIGA;Combination lock;Acceleration switch;MEMS   
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        发布时间：2021-03-12
      • CHEN Haiyong 1 LI Dongmei 1 CUI Qiliang 1 PAN Yuewu 1 LIU Bingbing 1 LIU Jing 2 ZOU Guangtian 1 1
        Issue 10, (2002)
        摘要：In situ high pressure energy dispersive X-ray diffraction experiments have been carried out on Te+MCM41 by using diamond anvil cell (DAC) device with synchrotron radiation source. The highest pressure is 37GPa. In the range of our experimental pressure, a cubic phase transitions of Te inside MCM41 from 5GPa is observed. Its peak intensity is weak.  
        关键词：Te;MCM41;Structural transition induced by high pressure;Synchrotron radiation   
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        发布时间：2021-03-12
      • HUANG Junrong 1,2 PENG Liangqiang 1 YI Futing 1 YU Runsheng 1 WEI Long 1 JIANG Yijian 2 ZHANG Jufang 1 HAN Yong 1 1
        Issue 10, (2002)
        摘要：High aspect ratio and great structural height, the most outstanding excellences of LIGA process, are used to fabricate reticulate nikel structure with abundant holes as antielectron modulator. The study of fabrication of antielectron modulator by LIGA was reported in this paper.  
        关键词：LIGA process;Antielectron modulator   
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        发布时间：2021-03-12
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