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Anomalous Phenomena in E<18 keV Hydrogen Ion Beam Implantation Experiments on Pd and Ti

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Chinese journal of nuclear physics 1997年第4期19卷 244-249页

作者： Wang Tieshan~(1) Piao Yubo~(2. Hao Jifang~(1) Wang Xuezhi~(2. Jin Genming~(1) Niu Zhanqi~(2. (1)institute of modern{2.,the Chinese Academy of Sciences,Lanzhou 730000 (2.Department of modern{2. of Lanzhou university,Lanzhou 730000 中科院近代物理所甘肃兰州兰州大学现代物理系甘肃兰州

Implantation experiments of low energy（1 keVmax1.2.mA/cm2.and lowbeam density(Jmin0.02.mA/cm2..Palladium and titanium foils（plates）are bombarded withproton and deuteron beams in order to compare the atomic and nucl... 详细信息

Implantation experiments of low energy（1 keVmax1.2.mA/cm2./sup>)and lowbeam density(Jmin0.02.mA/cm2./sup>).Palladium and titanium foils（plates）are bombarded withproton and deuteron beams in order to compare the atomic and nuclear interactions between dif-ferent ion beams.X-ray and charged particles are measured,and neutron and gamma doses arealso monitored during the implantation *** anomalous peak in X-spectra,whoseenergy is about four times the beam energy,is observed during the high beam density *** peak moves from about 40 keV to 62.keV and FWHM reduces rapidly,while thebeam energy and intensity *** wide peak with over twice the beam energy is mea-sured in experiment with low beam *** is located between 16 keV and 30 keV,and itspeak energy increases with the increase of implantation dose（implantation time）.Some anoma-lous intensities of neutrons correlated with a charged particle peak（2.93,3.85 MeV）are alsoobserved in the deuteron-palladium *** highest neutron intensity reaches about8×104 n/s,while the beam energy and intensity are about 15 keV and 1.0 mA,respectively.

关键词： Hydrogen ion beam Low energy Implantation Palladium and titanium foils

Investigation into the rotational bands of ^(185)Pt with the particle-rotor model

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Science China(physics,Mechanics & Astronomy) 2011年第S1期54卷 114-118页

作者： LI GuangShun1,2. ZHOU xiaoHong1,2. ZHANG ShuangQuan3, ZHANG YuHu1 & MENG Jie3 1 institute of {2. {2., Chinese Academy of Sciences, Lanzhou 730000, China 2.Graduate university of Chinese Academy of Sciences, Beijing 100049, China 3 School of {2. and SK Laboratory of Nuclear {2. & Technology, Peking university, Beijing 100871, China institute of modern{2. Chinese Academy of Sciences Lanzhou China Graduate university of Chinese Academy of Sciences Beijing China School of physics and SK Laboratory of Nuclear physics & Technology Peking University Beijing China

Theoretical calculations have been performed for the ν9/2.[62.](i13/2. and ν7/2.[503](f7/2. bands of 185Pt in the framework of particle-rotor model. The band properties of signature splitting and configuration mixing have been analyzed. The level energy and signature splitting before the band crossing can be well interpreted by introducing triaxiality. The positive-parity yrast band is pro posed to be dominated by the ν9/2.[62.](i13/2. component, while the negative-parity band shows strong mixing of ν7/2.[503](f7/2. and ν9/2.[505](h9/2. configurations.

关键词： High-spin states particle-rotor model signature splitting configuration mixing

Overexpression of coxsackie and adenovirus receptor inhibit growth of human bladder cancer cell in vitro and in vivo

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Acta Pharmacologica Sinica 2007年第6期28卷 895-900页

作者： Lin-lin ZHANG~2.Da-lin HE~(2.3,4),xiang LI~2.Lei LI~2.Guo-dong ZHU~2.Dong ZHANG~2.xin-yang WANG~2.2.{2. of Urology,First Hospital of xi'an Jiaotong university,xi'an 710061,China ~3 {2. of Oncology,Key Laboratory of Environ-ment and Genes Related to Diseases of the Ministry of Education,xi'an Jiaotong university,xi'an 710061,China institute of Urology First Hospital of Xi'an Jiaotong University Xi'an China institute of Oncology Key Laboratory of Environment and Genes Related to Diseases of the Ministry of Education Xi'an Jiaotong University Xi'an China

Aim:To study the effect of the overexpression of coxsackie and the adenovirusreceptor (CAR) on the growth of the human bladder cancer cell in vitro and ***:A retroviral vector pLXSN-CAR expressing CAR was constructedand confirmed by restriction enzyme *** pLXSN-CAR vector and con-trol vector pLXSN were transfected into the PT67 packaging cell line to generateretrovirus with high *** CAR-negative T2. cell was infected with the pLXSN-CAR and the pLXSN retrovirus,*** positive clone cells wereselected with G418 for 2.*** expression level of the CAR protein wasdetected by Western blot assay.T2. cell growth in vitro was determined by 3-(4,5-dimethylthiazol-2.yl)-2.5-diphenyltetrazolium bromide (MTT) ***-age-independent growth was measured by soft-agar colony formation *** cell growth was determined by a nude mice xenograft ***:ThepLXSN-CAR vector containing full-length CAR cDNA was *** blot analysis showed that a 46 kDa specific band wasfound in pLXSN-CA-transfected T2. *** assay identified the growthinhibition of T2./pLXSN-CAR *** cell colony forming ability of T2./pLXSN-CAR cells was significantly lower than that of T2./pLXSN and parental T2. *** was a reduction in the tumor size in the T2./pLXSN-CAR group as com-pared with that of the T2./pLXSN group and parental T2. ***:The overexpression of CAR in T2. bladder cancer cells can inhibit cell growthboth in vitro and in vivo.

关键词： coxsackie and the adenovirus receptor bladder cancer cell growth nude mice

The formation and stability of Si_(1-x)C_x alloys in Si implanted with carbon ions

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Chinese Science Bulletin 2001年第3期46卷 200-204页

作者： WANG Yinshu, LI Jinmin, JIN Yunfan, WANG Yutian, SUN Guosheng & LIN Lanying1. Department of physics, Beijing Normal university, Beijing 100875, China 2.{2. of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China 3.{2. of modern physics, Chinese Academy of Sciences, Lanzhou 730000, China Department of physics Beijing Normal University Beijing China institute of Semiconductors Chinese Academy of Sciences Beijing China institute of modern{2. Chinese Academy of Sciences Lanzhou China

Si1-xCx alloys of carbon (C) concentration between 0.6%-1.0% were grown in Si by ion implantation and high temperature annealing. The formation of Si1-xCx alloys under different ion doses and their stability during annealing were studied. If the implanted dose was less than that for amorphizing Si crystals, the implanted C atoms would like to combine with defects produced during implantation and it was difficult to form Si1-xCx alloys after being annealed at 850℃. With the increment of implanted C ion doses, the lattice damage increased and it was easier to form Si1-xCx alloys. But the lattice strain would become saturate and only part of implanted carbon atoms would occupy the substitutional positions to form Si1-xCx alloys as the implanted carbon dose increased to a certain degree. Once Si1-xCx alloys were formed, they were stable at 950℃, but part of their strain would release as the annealing temperature increased to 1 000℃. Stability of the alloys became worse with the increment of carbon

关键词： ion implantation Si1-xCx alloys stability of Si1-xCx alloys.

The dynamical properties of Rydberg hydrogen atom near a metal surface

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Science China(physics,Mechanics & Astronomy) 2005年第6期48卷 667-675页

作者： GE Meihua1, ZHANG Yanhui1, WANG Dehua2. DU Mengli3 & LIN Shenglu1 1. College of physics and Electronics, Shandong Normal university, Jinan 2.0014, China 2. Department of Mathematics and physics, Shandong institute of Architecture and Engineering, Jinan 2.0014, China 3. institute of Theoretical physics, Chinese Academy of Sciences, Beijing 100080, China College of physics and Electronics Shandong Normal University Jinan China Department of Mathematics and physics Shandong Institute of Architecture and Engineering Jinan China institute of Theoretical physics Chinese Academy of Sciences Beijing China

The dynamical properties of Rydberg hydrogen atom near a metal surface are presented by using the methods of phase space analysis and closed orbit theory. Transforming the coordinates of the Hamiltonian, we find that the phase space of the system is divided into vibrational and rotational region. Both the Poincaré surface of section and the closed orbit theory verify the same conclusion clearly. In this paper we choose the atomic principal quantum number as n = 2.. The dynamical character of the exited hydrogen atom depends sensitively on the atom-surface distance d. When d is sufficiently large, the atom-surface potential can be expressed by the traditional van der Waals force and the system is integrable. When d becomes smaller, there exists a critical value dc. For d > dc, the system is near-integrable and the motion is regular. While chaotic motion appears for d < dc, and the system tends to be non-integrable. The trajectories become unstable and the electron might be captured onto the metal surface.

关键词： Rydberg hydrogen atom, van der Waals interaction, Poincaré surface of section, closed orbit theory, chaos.

Pressure-induced crystallite breaking in La_(0.7)Sr_(0.3)Mn_(0.9)Fe_(0.1)O_3 nanosolids

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Chinese Science Bulletin 1998年第6期43卷 458-461页

作者： ZHENG Fanlei 1, 2. SUI Yu 1, 3, XU Dapeng 1 and SU Wenhui 1, 4 1. Department of physics, Jilin university, Changchun 13002., China 2. Changchun{2. of physics, Chinese Academy of Sciences, Changchun 13002., China 3.{2. of Metal R Department of physics Jilin University Changchun Chinas Changchun institute of physics Chinese Academy of Sciences Changchun China institute of Metal Research Chinese Academy of Sciences Shenyang China International Center for Materials physics Chinese Academy of Sceinces Shenyang China Center for Condensed Matter and Radiation physics CCAST (World Lab.) Beijing China

In the compacting process of the La 0.7Sr 0.3Mn 0.9Fe 0.1O 3 nanosolids under the pressure range of 0.0-4.5 GPa, the apparent pressure-induced crystallite breaking phenomenon in these nanosolids was observed. With increasing pressure up to 4.5 GPa, the average grain size decreases by 46% while the magnetization of nanosolids decrease by 40% and their coercive increases by 35%. This kind of breaking has a close relation to the existence of oxygen deficiency in La 0.7Sr 0.3Mn 0.9Fe 0.1O 3 nanoparticles. A simple and convenient method for preparing the bulk nanosolids with a large number of clean interfaces has been suggested.

关键词： nanosolid pressure-induced breaking high pressure.

Geochronological evidence of Indosinian(high-pressure) metamorphic event and its tectonic significance in Taxkorgan area of the Western Kunlun Mountains,NW China

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Science China Earth Sciences 2010年第10期53卷 1445-1459页

作者： YANG WenQiang1,LIU Liang1,CAO YuTing1,WANG Chao1,2.HE ShiPing2.LI RongShe2.& ZHU xiaoHui1 1 State Key Laboratory of Continental Dynamics,Department of Geology,northwest {2.,xi’an {2.,China 2.xi’an institute of Geology and Mineral Resource,xi’an 710054,China State Key Laboratory of Continental Dynamics Department of Geology Northwest University Xi’an China xi’an institute of Geology and Mineral Resource Xi’an China

The CL images,LA-ICP-MS in situ trace elements analysis,and U-Pb dating for zircons indicate that the metamorphic ages of the sillimanite-garnet-biotite gneiss and the garnet-amphibole gneiss from eastern Taxkorgan of the Western Kunlun Mountains are 2.0±2.and 2.0±3 Ma respectively,and their protolith ages are younger than 2.3±2.and 480±8 Ma *** samples were collected at the same outcrops with HP mafic granulite and HP pelitic *** assemblage of the sillimanite-garnet-biotite gneiss(Grt+Sill+Per+Q) is consistent with that of HP pelitic granulite at early high amphibolite-granulite facies *** assemblage of the garnet-amphibole gneiss(Grt+Amp+Pl+Q) is consistent with retro-metamorphic assemblage of HP mafic granulite at amphibolite facies *** dating results suggest that these HP granulites underwent peak metamorphism at 2.0±2.to 2.3±2.***,the Kangxiwar tectonic zone was probably formed by subduction and collision of the Paleo-Tethys Ocean during *** ages of the two samples,together with previously published U-Pb zircon dating age,suggest that the sillimanite-garnet schist-quartzite unit is a late Paleozoic unit,not a part of the Paleoproterozoic Bulunkuole Group.

关键词： Western Kunlun Mountains LA-ICP-MS zircon dating Bulunkuole Group Indosinian Kangxiwar tectonic zone

A complex variable meshless method for fracture problems

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Science China(physics,Mechanics & Astronomy) 2006年第1期49卷 46-59页

作者： CHENG Yumin1 & LI Jiuhong2.1. Shanghai institute of Applied Mathematics and Mechanics, Shanghai university, Shanghai 2.0072. China 2. Department of Building Engineering, {2.’an university of Technology, {2.’an 710048, China Shanghai institute of Applied Mathematics and Mechanics Shanghai University Shanghai China Department of Building Engineering Xi’an University of Technology Xi’an China

Based on the moving least-square (MLS) approximation, the complex variable moving least-square approximation (CVMLS) is discussed in this paper. The complex variable moving least-square approximation cannot form ill-conditioned equations, and has greater precision and computational efficiency. Using the analytical solution near the tip of a crack, the trial functions in the complex variable moving least-square approxi- mation are extended, and the corresponding approximation function is obtained. And from the minimum potential energy principle, a complex variable meshless method for fracture problems is presented, and the formulae of the complex variable meshless method are obtained. The complex variable meshless method in this paper has greater precision and computational efficiency than the conventional meshless method. Some examples are given.

关键词： moving least-square approximation, complex variable moving least-square approximation, meshless method, complex variable meshless method, fracture.

Properties of the 3/2.-[52.] band in the odd-N rare-earth nuclei

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Science China(physics,Mechanics & Astronomy) 2011年第S1期54卷 37-43页

作者： CHEN Liang1,2. ZHOU xiaoHong1,2. ZHANG YuHu1, ZHANG ShuangQuan3 & ZHU LiHua4 1institute of {2. {2., Chinese Academy of Sciences, Lanzhou 730000, China 2.raduate university of Chinese Academy of Sciences, Beijing 100049, China 3State Key Laboratory of Nuclear {2. and Technology, School of {2., Peking university, Beijing 100871, China 4China institute of Atomic Energy, Beijing 102.13, China institute of modern{2. Chinese Academy of Sciences Lanzhou China Graduate university of Chinese Academy of Sciences Beijing China State Key Laboratory of Nuclear physics and Technology School of Physics Peking University Beijing China China institute of Atomic Energy Beijing China

High-spin states in 161Er have been studied experimentally via the 150Nd(16O, 5n) reaction at a beam energy of 86 MeV. Three rotational bands built on the 5/2.[642., 3/2.[52.], and 11/2.[505] configurations have been extended up to high-spin states, and particularly, the α = -1/2.branch of the ground state 3/2.[52.] band has been revised significantly. It is found that signature inversion occurs in the 3/2.[52.] band after the band crossing in 161Er. The systematics of the signature inversion associated with the 3/2.[52.] configuration in the rare-earth region is discussed. The band properties are analyzed within the framework of a triaxial particle-rotor model, and a triaxial deformation is proposed to the 3/2.[52.] band.

关键词： high-spin states signature inversion triaxial particle-rotor model