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PIXE and INAA studies on ancient potteries from Guangfulin relics in shanghai

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Progress in Natural Science:Materials International 2007年第11期17卷 1348-1356页

作者： Lin Jiawei1, Cheng Huansheng1, Zhang Zhengquan1, Zhang Bin1, Feng Songlin2, Song Jian3, Gao Menghe4.and Zhu Dan1(1. Applied Ion Beam physics Laboratory, Key Laboratory of the Ministry of Education, institute of modern physics,{4., shanghai 2004.3, China 2. Key Laboratory of Nuclear Analytical Techniques, institute of High Energy physics, Beijing 100039, China 3. shanghai Museum, shanghai 200003, China 4. Department of Cultural Heritage and Museology,{4., shanghai 2004.3, China) Applied Ion Beam physics Laboratory Key Laboratory of the Ministry of Education Institute of Modern Physics Fudan University Shanghai 200433 China Key Laboratory of Nuclear Analytical Techniques Institute of High Energy Physics Beijing 100039 China shanghai Museum Shanghai 200003 China Department of Cultural Heritage and Museology Fudan University Shanghai 200433 China

This paper reports the study of ancient potteries unearthed from the Guangfulin site in shanghai. From the external features of these potteries, archeologists can classify them into two different cultural types: Liangzhu culture (local culture) and a new culture which might be derived elsewhere, but they can not recognize whether they were produced in the same place. Proton induced X-ray emission (PIXE) and instrumental neutron activation analysis (INAA) were used to measure the chemical compositions of the samples and the results were analyzed using multivariate statistics. We found that the two methods can complement each other and their database can be mutually referenced in the study of ancient potteries. Experimental results show that the compositions of the potteries from the two cultural types are different, which means that the materials for ancient potteries of new culture originate from elsewhere. This supports the archaeologists’ speculation that a group of ancient people migrated to shanghai from some other places 4.00 years ago.

关键词： PIXE INAA factor analysis Guangfulin ancient pottery

Proton induced X-ray emission (PIXE) analysis of sources of porcelain body of Ru Guan and Jun Guan porcelains

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Science China(physics,Mechanics & Astronomy) 2006年第4期49卷 411-420页

作者： LI Guoxia1, ZHAO Weijuan1, LI Rongwu2, SUN Hongwei1, GUO Min1, WANG Yanfang1, LIU Hui1, ZHAO Qingyun3, SUN Xinmin3, ZHAO Wenjun3 & CHENG Huansheng4.1. Faculty of Physical Engineering, Zhengzhou university, Zhengzhou 4.0052, China 2. Department of physics, Beijing Normal university, Beijing 100875, China 3. institute of Cultural Relic and Archaeology of Henan Province, Zhengzhou 4.0000, China {4., fudan university, shanghai 2004.3, China Faculty of Physical Engineering Zhengzhou University Zhengzhou 450052 China Department of physics Beijing Normal University Beijing 100875 China institute of Cultural Relic Archaeology of Henan Province Zhengzhou 450000 China institute of modern physics Fudan University Shanghai 200433 China

34.samples of Ru Guan porcelain body and 50 samples of Jun Guan porcelain body (both kinds being in different body colors) were selected with the purpose of finding out the source of raw materials and their classification relationship so as to search for ways of non-destructive discrimination. Proton induced X-ray emission (PIXE) has been applied to these samples to determine their chemical elements. The data of seven major chemical elements collected from these samples were further studied through fuzzy cluster analysis. Results indicate that the origin of raw materials of Jun Guan porcelain body samples is comparatively more concentrated in certain places, while that of Ru Guan porcelain body samples is scattered about. The places of origin of raw materials of the majority of Ru Guan and Jun Guan porcelain body samples have something in common, but some differences still exist. It might be an important way for non-destructive discrimination among Ru Guan and Jun Guan porcelains by combining PIXE with fuzzy cluster analysis.

关键词： Ru Guan and Jun Guan porcelain, source of porcelain body, PIXE, fuzzy cluster analysis, non-destructive discrimination.

Hydrogenation of CO over carbides of tungsten

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Chinese Journal of Chemistry 1992年第1期10卷 5-9页

作者： QIN,Dai-Yi GAO,Zi Department of Chemistry,fudan university,shanghai 2004.3 QIU,Yue-Ming DONG,Shu-Zhong Department of modern {4.,fudan university,shanghai 2004.3 1Department of Chemistry Fudan University Shanghai 2004332Department of Modern Physics Fudan University Shanghai 200433

CO hydrogenation on tungsten carbides has been *** methanation activities of tungsten carbides are comparable to that of supported Group VIII metal ***- programmed thermal desorption spectra of CO on tungsten carbide ... 详细信息

关键词： Hydrogenation of CO over carbides of tungsten CO over

β-delayed proton decays near the proton drip line

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Science China(physics,Mechanics & Astronomy) 2005年第3期48卷 257-267页

作者： XU Shuwei 1 , LI Zhankui 1 , XIE Yuanxiang 1 , HUANG Wenxue 1 , SHU Nengchuan 2 , CHEN Yongshou 2 , XU Furong 3 , WANG Kun 4., PAN Qiangyan 1 , WANG Xudong 1 , YU Yong 1 & XING Yebing 1 1. institute of modern physics, Chinese Academy of Sciences, Lanzhou 730000, China 2. Nuclear physics Department, China institute of Atomic Energy, Beijing 1024.3, China 3. Department of Technical physics, Peking university, Beijing 100871, China 4. shanghai institute for Nuclear Research, shanghai 201800, China 1. institute of modern physics Chinese Academy of Sciences 730000 Lanzhou China 2. Nuclear physics Department China Institute of Atomic Energy 102413 Beijing China 3. Department of Technical physics Peking University 100871 Beijing China 4. shanghai institute for Nuclear Research 201800 Shanghai China

We briefly reviewed the experimental study on a-delayed proton decays near the proton drip line published by our group during the period of 1996―2004. namely the first observation of the a-delayed proton decays of 9 new nuclides in the rare-earth region and the new measurements of a-delayed proton decays of 5 nuclides in the mass ～90 region near the N = Z line with the aid of the “p-?” coincidence in combination with a He-jet tape transport system. In the meantime some important experimental technique details were supplemented. The experimental results, including the half -lives, spins, parities, deformations and production reaction cross sections for the 14.nuclei were summarized and compared with the current nuclear-model predictions, and then the following points were represented. (1) The experimental half-lives for 85Mo and 92Rh as well as the predicted “waiting point” nuclei 89Ru and 93Pd are 5―10 times longer than the theoretical predictions given by M?ller et al. using a macroscopic-microscopic model. It considerably influences the predictions of the abundances of the nuclides produced in the rp-process. (2) The current-model predictions are not consistent with the experimental assignments of the spins and parities for the proton drip-line nuclei 14.Ho and 128Pm. However, the nuclear potential energy surface (PES) calculated by using a Woods- Saxon-Strutinsky method reproduced the experimental results. (3) The Alice code overestimated the production reaction cross sections of the studied 9 rare-earth nuclei by one order of magnitude or two, while HIVAP code overestimated them by one order of magnitude approximately.

关键词： proton drip line, β-delayed proton decay, He-jet tape transport system, "p-γ" coincidence, spin, parity, deformation, production reaction cross section.

TURNING-OVER OF THE ELECTRIC DIPOLE IN A POLYMER

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Chinese Journal of Polymer Science 2001年第6期19卷 573-578页

作者： Guang-qi Li Xin Sun and Sheng Li State Key Laboratory of Surface physics and Research Center for Theoretical physics, fudan university shanghai 2004.3, China National Laboratory of Infrared physics, shanghai institute of Technical physics,shanghai 200083, China fudan Univ State Key Lab Surface Phys Shanghai 200433 Peoples R China fudan Univ Res Ctr Theoret Phys Shanghai 200433 Peoples R China Acad Sinica Shanghai Inst Tech Phys Natl Lab Infrared Phys Shanghai 200083 Peoples R China

The transition from the biexciton to the exciton can turn over the direction of the electric dipole of a polymericmolecule. This turning-over action combined with the photoinduced polarization reversion can be used as a switch. Theswitching speed is governed by the relaxation time of the turning-over process, which can be determined by a dynamicalsimulation.

关键词： exciton biexciton electric dipole switch relaxation

Electronic Structure Calculation for Co_6(μ_6-C)(μ_3-S)_2(CO)_(12) Cluster

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Chinese Chemical Letters 1997年第4期8卷 351-352页

作者： Wen LI Ye LIU Yuan Qi YIN( Lanzhou institute of Chemical physics, Academia Sinica)(Research Center of Analysis and Measurement, fudan university, shanghai 2004.3) ACAD SINICA LANZHOU INST CHEM PHYSLANZHOUPEOPLES R CHINA fudan UNIV RES CTR ANAL & MEASUREMENTSHANGHAI 200433PEOPLES R CHINA

The electronic Structure ofCo6(μ_6-C)(μ_3-S)_2(CO)_(12) molecule has been calculated by DV-Xα method. The results show that the reaction mechanism of CS_2 and Co2(CO)8 in synthsis seems only to undergo the additive and decarbonyl processes. The other result worthy of being mentioned is the calculated atonmic charges that are Co0.3+,S1.29+,μ6-Cl. 16-,C0.06- and O0.21-.S atom has not only the positive charge but also four times as much as that of Co atom. This is not in accordance with the electronegativihes of 1.7 and 2.5 respectively for Co and S atom

关键词： Co CO Cluster

I-V and C-V properties of TiO_2 thin film by pulsed-laser reactive deposition

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Chinese Science Bulletin 1998年第16期43卷 1344-1349页

作者： FU Zhengwen 1, ZHOU Mingfei 1, ZHANG Shengkun 2,CHEN Lianyao 2 and QIN Qizong 1 1. Laser Chemistry institute, fudan university, shanghai 2004.3, China 2. Department of physics, fudan university, shanghai 2004.3, China Laser Chemistry institute Fudan University Shanghai China Department of Pnysics Fudan University Shanghai China

TiO-2 thin films have bee deposited on p-Si(111) substrates by pulsed-laser ablation of metallic Ti target in the O-3 ambient. The current-voltage and capacitance-voltage of the Al/TiO-2/Si capacitors are measured. The results show that the dielectric constant of thin film after being annealed at 700℃ is found to be 4., and the border trap density and the interface state density at the TiO-2/p-Si interface are 1.8×10 12 cm -2 and 2×10 12 eV -1·cm -2, respectively. The conduction mechanisms of as-deposited films are also discussed.

关键词： TiO-2 dielectric properties electrical properties pulsed-laser deposition.

PREPARATION AND TRANSPORT PROPERTIES OF SUPERCONDUCTING BPSCCO THIN FILMS

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低温物理学报 1993年第5期 350-352页

作者： Yang Yu Surface physics Laboratory, fudan university, shanghai, 2004.3.Li Guozhen, Cao yan, Zeng GuangliKunming institute of physics, Kunming, 650223

The perparation of BPSCCO thin films by DC magnetron sputtering is reported. We prepared high mass density target of Bi2Pb0.6Sr2Ca2Cu3O10. By varying the substrate temperature, ratio of Ar and O2 pressure as well as the distance between target and substrate, we were able to optimize the process for c -axis oriented thin films of Bi-Compounds. As deposited films show Tcon at about 95K. These films were examined using the electron-probe microanalysic (EMPA) and X-ray diffraction (XRD). The results of electrical resistivity and Hall effect have been discussed. Hall voltage in the mixed state is strongly nonlinear, showing certain features that suggests that vortex depinning mechanism plays an important role in the Hall effect behaviour.

关键词： Hall PREPARATION AND TRANSPORT PROPERTIES OF SUPERCONDUCTING BPSCCO THIN FILMS Pb Figure

Temporal Characteristics of Luminescencefrom Ultrashort-pulsed Infrared LaserStimulated Electron Trapping Materials

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Chinese Journal of Lasers 1997年第1期B6卷 86-90页

作者： RUAN Hao CHEN Shuchun GAN Fuxi(shanghai institute of Optics & Fine Mechanics,Chinese Academy of Sciences, shanghai 201800)XU Jianhua ZHOU Guangpeng LU Xingze(Lases physics Laboratory,physics Department,fudan university,shanghai 2004.3,China) fudan Univ Shanghai China

Temporal characteristics of luminescence from picosecond infrared laser stimulated electron trapping materials (ETM's) are demonstrated. The measurements show that the luminescent lifetimes of SrS(Eu,Sm) and SrS(Ce,Sm) are 4. ns and 4. ns, respectively. The results indicate that use of electron trapping materials in real-time optical information processing is possible.

关键词： electron trappig materials infrared stimulated luminescence temporal characteristics real-time information processing