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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 {3. physics,{4., shanghai 2.043., China 2. Key Laboratory of Nuclear Analytical Techniques, institute of High Energy physics, Beijing 10003., China 3. shanghai Museum, shanghai 200003. China 4. Department of Cultural Heritage and Museology,{4., shanghai 2.043., China) Applied Ion Beam physics Laboratory 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 {3., Beijing Normal university, Beijing 100875, China 3. {3. of Cultural Relic and Archaeology of Henan Province, Zhengzhou 4.0000, China {4., fudan university, shanghai 2.043., China Faculty of Physical Engineering Zhengzhou University Zhengzhou China Department of physics Beijing Normal University Beijing China institute of Cultural Relic and Archaeology of Henan Province Zhengzhou China institute of modern physics Fudan University Shanghai China

3.0}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.

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 {3., Chinese Academy of Sciences, Lanzhou 73.000, China 2. Nuclear {3. Department, China institute of Atomic Energy, Beijing 1024.3. China 3. Department of Technical {3., Peking university, Beijing 100871, China 4. shanghai institute for Nuclear Research, shanghai 201800, China institute of modern physics Chinese Academy of Sciences Lanzhou China Nuclear physics Department China Institute of Atomic Energy Beijing China Department of Technical physics Peking University Beijing China shanghai institute for Nuclear Research 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 93.d 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.

Main chemical ingredients of the celadon glaze from Qingliangsi kiln and Zhanggongxiang kiln

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Science China(physics,Mechanics & Astronomy) 2006年第4期49卷 487-495页

作者： ZHAO Weijuan1, LU Xiaoke1, LI Guoxia1, GUO Min1, XIE Jianzhong1, GAO Zhengyao1, SUN Xinmin2, GUO Musen2, CHENG Huansheng3.& ZHANG Bin3.1. Faculty of Physical Engineering, Zhengzhou university, Zhengzhou 4.0052, China 2. Research institute of Cultural Relic and Archaeology, Henan Province, Zhengzhou 4.0004. China 3. Research institute of {3. {4., fudan university, shanghai 2.043., China Faculty of Physical Engineering Zhengzhou University Zhengzhou China Research institute of Cultural Relic and Archaeology Zhengzhou China Research institute of modern physics Fudan University Shanghai China

The proton induced X-ray emission (PIXE) is used to determine the chemical ingredients of seven main elements in the samples of Ru Guan porcelain glazes and Ru Civil porcelain from Qingliangsi kiln in Baofeng County and the samples of celadon glaze from Zhanggongxiang kiln in Ruzhou City. The PIXE data are then analyzed by scatter analysis and fuzzy cluster method for determining their classification and provenance. The results show that there are obvious differences between the ingredients of glaze material of Ru Guan porcelain and Ru Civil porcelain from Qingliangsi kiln, of which the former ingredients are stable and its source is localized, and that the sources and ingredients of the glaze of Ru Guan porcelain and those of celadon glaze from Zhanggongxiang kiln are not wholly the same, of which the latter sources are much scattering.

关键词： Zhanggongxiang kiln, Qingliangsi kiln, the source of raw material, the proton induced X-ray emission.

Ultrafast excitation relaxation in light-harvesting complex LH2 from *** 601

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Science China Chemistry 2004年第3期47卷 192-199页

作者： GUO Lijun1,2, LIU Yuan3. LIU Weimin2, GUO Junhua1, XU Chunhe3.& QIAN Shixiong2 1. School of physics and Information Optoelectronics, Henan university, Kaifeng 4.5001, China 2. physics Department, fudan university,{4., China 3. shanghai institute of Plant Physiology, Chinese Academy of Sciences, shanghai 20003., China School of physics and Information Optoelectronics Henan University Kaifeng China physics Department Fudan University Shanghai China shanghai institute of Plant Physiology Chinese Academy of Sciences Shanghai China

The energy relaxation and kinetic evolution of transient spectra of bacteriochloro- phylls (BChls) in light-harvesting complex LH2 from Rb. sphaeroides 601 were investigated using femtosecond pump-probe technique. Upon 783.nm excitation, the energy at B800 BChls ex-periences an intramolecular redistribution with 0.3. ps time constant before transferring to B850 BChls. With tuning the excitation wavelength, the dynamical evolution of excited BChls was clearly observed, which indicates an obvious competition between the ground state bleaching and excited state absorption (ESA) of BChls involved and an isosbestic point near 818 nm, and also demonstrates that from the lower electronic excited state of B800 BChls to the higher exci-tonic state of B850 BChls is an efficient routine for energy transfer. The excitation energy in higher excitonic states of B850 BChls relaxes rapidly to the next lowest excitonic state by inter-conversion, delocalization to adjacent molecular, populating the lowest excitonic state and the change of molecular conformation.

关键词： photosynthesis, light-harvesting complex, energy transfer, ultrafast, dynamics, purple bacteria.

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{3. QIU,Yue-Ming DONG,Shu-Zhong Department of {4. physics,fudan university,shanghai{3. Department of Chemistry Fudan University Shanghai 200433 Department 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

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{3., China National Laboratory of Infrared physics, shanghai institute of Technical physics,shanghai 200083. China Stt. Key Lab. of Surface physics Res. Center for Theoretical Physics Fudan University Shanghai 200433 China Natl. Laboratory of Infrared physics Shanghai Inst. of Technical Physics Shanghai 200083 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

Structure analysis of ^(159)Sm and properties of odd-mass neutron-rich nuclei in mass-160 region

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Science China(physics,Mechanics & Astronomy) 2011年第S1期54卷 81-87页

作者： YANG YingChun1 & SUN Yang1,2,3.1 Department of physics, shanghai Jiao Tong university, shanghai 20024., China 2{4. of modern physics, Chinese Academy of Sciences, Lanzhou 73.000, China 3.epartment of physics and Astronomy, university of Tennessee, Knoxville, Tennessee 3.996, USA Department of physics Shanghai Jiao Tong University Shanghai China institute of modern physics Chinese Academy of Sciences Lanzhou China Department of physics and Astronomy University of Tennessee Knoxville USA

Recent fission experiment data provide interesting structure information for neutron-rich nuclei in the mass A ～ 160 region. We apply the projected shell model to study the strongly-deformed, neutron-rich Sm isotopes. We perform calculations for rotational bands up to spin I = 20 (29/2) for even-even (odd-neutron) Sm isotopes, and analyze the band structure of low-lying states with quasiparticle excitations. Emphasis is given to rotational bands based on one-quasiparticle (1-qp) configurations in the odd-mass 159Sm. The 159 Sm result is discussed together with those of the even-even isotopes 158,160Sm. New bands in 159Sm based on neutron 1-qp 1/2 and 5/2+ configurations are predicted. Electromagnetic transition probabilities are discussed.

关键词： projected shell model neutron-rich nuclei low-lying excitations isomeric states

Jackknife and Bootstrap Tests of the Composition Vector Trees

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Genomics, Proteomics & Bioinformatics 2010年第4期8卷 262-267页

作者： Guanghong Zuo1,2, Zhao Xu1,3. Hongjie Yu1,4. and Bailin Hao1,5,6 1T-Life Research Center & Department of physics, fudan university,{3., China 2shanghai {4. of Applied physics, Chinese Acadamy of Sciences, {3. 201800, China 3.pplied Biosystems, Inc., Beijing 100027, China 4.7}-VARI Center for Genetic Epidemiology, fudan university,{3., China 5{4. of Theoretical physics, Chinese Acadamy of Sciences, Beijing 100190, China 6Santa Fe {4., Santa Fe, NM 87505, USA. T-Life Research Center & Department of physics Fudan University Shanghai 200433 China.

Composition vector trees （CVTrees） are inferred from whole-genome data by an alignment-free and parameter-free method. The agreement of these trees with the corresponding taxonomy provides an objective justification of the inferred phylogeny. In this work, we show the stability and self-consistency of CVTrees by performing bootstrap and jackknife re-sampling tests adapted to this alignment-free approach. Our ultimate goal is to advocate the viewpoint that time-consuming statistical re-sampling tests can be avoided at all in using this alignment-free approach. Agreement with taxonomy should be taken as a major criterion to estimate prokaryotic phylogenetic trees.

关键词： composition vector phylogeny topological distance bootstrap jackknife CVTree