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X-ray spectra induced by ^(129)Xe^(q+) impacting the metal surface

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Science China(physics,Mechanics & Astronomy) 2008年第1期51卷 82-89页

作者： ZHANG XiaoAn 1,2 ,XIAO GuoQing 1 ,YANG ZhiHu 1 ,CHEN XiMeng 3 ,ZHAO YongTao 1 , LI FuLi 4 ,WANG Li 1,2 ,CUI Ying 3 ,ZHANG HongQiang 3 &ZHAN WenLong 1 1Institute of modern physics,Chinese Academy of Sciences,lanzhou 730000,China 2department of physics,Xianyang Normal university,Xianyang 712000,China 3department of modern physics,lanzhou university,lanzhou 730000,China 4department of Applied physics,Xi’an Jiaotong university,Xi’an 710049,China Institute of modern physics Chinese Academy of Sciences department of physics Xianyang Normal University

Using the slow highly charged ions 129 Xe q+ (q=25,26,27;initial kinetic T0≤4.65 keV/a.u.)to impact Au surface,the Au atomic Mαcharacteristic X-ray spectrum is *** result shows that as long as the charge state of projectile is high enough,the heavy atomic characteristic X-ray can be effectively excited even though the incident beam is very weak(nA magnitude),and the X-ray yield per ion is in the order of 10-8and increases with the kinetic energy and potential energy of *** measuring the Au Mα-X-ray spectra,Au atomic N-level lifetime is estimated at about 1.33×10-18s based on Heisenberg uncertainty relation.

关键词： slow highly charged ions characteristic X-ray level lifetime

Analysis of the negative-parity yrast band in ^(155)Tb

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Nuclear Science and Techniques 2000年第1期11卷 55-59页

作者： WU Xing-Ju XU Jin-Zhang CHEN Xing-Qu (Center of Theoretical Nuclear physics, National Laboratory of Heavy Ion Accelerator, lanzhou 730000 physics department,Lu-an Teacher’s College,Lu-an, Anhui 237012 department of modern physics, lanzhou university, 六安师范专科学校重离子加速器国家实验室安徽六安 237012 兰州大学现代物理系重离子加速器国家实验室甘肃兰州 730000

Using the particle-rotor model, the energy spectrum and the B（MI）/B（E2） ratio of the negative-parity yrast band in 155Tb are investigated and compared with the experimental data before and after the band-crossing. It is noted that before and after the band-crossing the moment of inertia of the core is a smooth function of the total angular momentum I and can be described by the ah formula. The yrast band of 155Tb with negative parity may be triaxially deformed （γ=-13°） before and an axially symmetric shape （γ=0°） after the band-crossing.

关键词：铽155 原子核高自旋态结构性质负跃迁晕转态核子

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 physics,the Chinese Academy of Sciences,lanzhou 730000 (2)department of modern physics 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...

Implantation experiments of low energy（1 keV<E<18 keV）hydrogen ion beamson hydrogen loaded metals are performed with high beam density(Jsub>max/sub>1.2 mA/cmsup>2/sup>)and lowbeam density(Jsub>min/sub>0.02 mA/cmsup>2/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 about8×10sup>4/sup> 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

X-ray spectra induced in highly charged 40Ar^q+ interacting with Au surface

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Science China(physics,Mechanics & Astronomy) 2006年第2期49卷 203-212页

作者： ZHANG Xiao’an1,2, XIAO Guoqing1, YANG Zhihu1, CHEN Ximeng3, ZHAO Yongtao1, LI Fuli4, ZHANG Yinping1, CUI Ying3, ZHANG Hongqiang3, XU Xu3, SHAO Jianxiong3 & ZHAN Wenlong11. Institute of modern physics, Chinese Academy of Sciences, lanzhou 730000, China 2. department of physics, Xianyang Normal university, Xianyang 712000, China 3. department of modern physics, lanzhou university, lanzhou 730000, China 4. department of Applied physics, Xi’an Jiaotong university, Xi’an 710049, China Institute of modern physics Chinese Academy of Sciences Lanzhou 730000 China

By use of optical spectrum technology, the spectra of X-ray induced by highly charged 40Arq+ ions interacting with Au surface have been studied. The results show that the argon Kα X-ray were emitted from the hollow atoms formed below the surface. There is a process of multi-electron exciting in neutralization of the Ar16+ion, with electronic con-figuration 1s2 in its ground state below the solid surface. The yield of the projectile Kα X-ray is related to its initial electronic configuration, and the yield of the target X-ray is related to the projectile kinetic energy.

关键词： highly charged ion hollow multi-electron excitation X- ray.

X-ray spectra induced by slow highly charged Ar^(q+) ions in collision with Nb surface

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Science China(physics,Mechanics & Astronomy) 2008年第10期51卷 1463-1469页

作者： YANG ZhiHu1, CUI Ying2, CHEN XiMeng2, SONG ZhangYong1, SHAO JianXiong2, RUAN FangFang1, ZHANG HongQiang2, DU Juan2, LIU YuWen2, GAO ZhiMing2, ZHANG XiaoAn3, ZHU KeXin1, YU DeYang1 & CAI XiaoHong1 1 Institute of modern physics, Chinese Academy of Sciences, lanzhou 730000, China 2 department of modern physics, lanzhou university, lanzhou 730000, China 3 department of physics, Xianyang Normal College, Xianyang 712000, China Institute of modern physics Chinese Academy of Sciences Lanzhou China department of modern physics Lanzhou University Lanzhou China department of physics Xianyang Normal College Xianyang China

The X-ray spectra of Nb surface induced by Arq+ (q =16,17) ions with the energy range from 10 to 20 keV/q were studied by the optical spectrum technology. The experimental results indicate that the multi-electron excitation occurred as a highly charged Ar16+ ion was neutralized below the metal surface. The K shell electron of Ar16+ was excited and then de-excited cascadly to emit K X-ray. The intensity of the X-ray emitted from K shell of the hollow Ar atom decreased with the increase of projectile kinetic energy. The intensity of the X-ray emitted from L shell of the target atom Nb increased with the increase of projectile kinetic energy. The X-ray yield of Ar17+ is three magnitude orders larger than that of Ar16+.

关键词： highly charged ion hollow atom multi-electron X-ray

APPLICATION OF SURFACE-ENHANCED RAMAN SPECTORSCOPY FOR CHARACTERIZING HUMIC SUBSTANCES

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Chinese Chemical Letters 1993年第4期4卷 361-362页

作者： Tong Wen NI Analytical And Testing Centre Of Gansu Province,lanzhou 730000Yu Hui YANG department of modern physics,lanzhou university,lanzhou 730000

Surface-enhanced Raman Spectroscopy(SERS)has been used to characterize hurnic *** using HNO_3 -roughened silver foils as the enhancing surface,both fluorescence quenching and strong SERS signals have been observed at the same *** results obtained herein show that SERS is a particularly sensitive and highly selective technique for the characterization of humic substances in the environment. Humic substances axe receiving ever-inereasing attention because of their importance in the environment. Very recently,we have reported the first successful application of Raman spectroscopy for characterizing humic *** this present paper,the application of surface-enhanced Raman spectroscopy(SERS)for humic substances has further been *** our knowledge,no such studies have previously been *** results obtained herein dearly demonstrate that SERS has a great deal of promise as an analytical method for“In Situ”characterizing humic substances in the environment.

关键词： SERS SEI APPLICATION OF SURFACE-ENHANCED RAMAN SPECTORSCOPY FOR CHARACTERIZING HUMIC SUBSTANCES

STUDIES ON THE ADSORPTION OF ANTIBIOTICS OF THE TETRACYCLINE GROUP ONTO SULFOCATIONITES

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Chinese Journal of Reactive Polymers 1993年第1期2卷 7-14页

作者： Li Tianbao Zhao Aimin(department of modern physics,lanzhou university,lanzhou,730000 China)

The adsorption processes of antibiotics of the tetracyline group (ATG) by several home-made sulfocationites are studied in this *** results show that the adsorption may be of nonequivalent normality under certain pH *** adsorption mechanism is discussed with infrared *** can be concluded that ATG can interact with sulfocationites by ion exchange mechanism or ion-transfer mechanism or both of them.

关键词：吸附性抗菌素抗生素四环素磺基阳离子交换剂离子交换机理

FORMATION OF ALLOY MICROSPHERES UNDER THE IMPLANTATION OF INTENSE PULSED ION BEAMS

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Chinese Science Bulletin 1989年第17期34卷 1421-1424页

作者：江兴流王天民李秉清高金城 department of modern physics. lanzhou university department of physics Lanzhou University department of Biology Lanzhou University

I. INTRODUCTION Implantation with intense pulsed ion beams causes great changes of morphology, microstructure and physicochemical behaviours of doped area of the metal target due to atomic mixing, rapid melting and quenching, and shock pressure. In the previous works,the results of microcrystallization and noncrystallization of implanted samples by pulsed

关键词： ion implantation microstructure shock pressure amorphous TEM analysis

Calculations of Superdeformed Bands in j_(15/2^-)Model

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Chinese journal of nuclear physics 1994年第3期 233-238页

作者： Chen Xing-qu Xing Zheng (department of modern physics,lanzhou university,lanzhou 730000)

Using the particle-rotor model,some features of superdeformed bands builtupon j15 orbitals have been *** excellent agreement between the caleu-lated and observed transition energies,kinematic and dynamic moments of in...

Using the particle-rotor model,some features of superdeformed bands builtupon jsub>15/sub> orbitals have been *** excellent agreement between the caleu-lated and observed transition energies,kinematic and dynamic moments of inertiaof Hg（bl）is obtained.

关键词： Nuelear structure Superdeformed bands Particle-rotor model Electromagnetic transition