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Catalytic protection of stannous ion by ascorbic acid in diphosphonic acids solutions

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nuclear Science and Techniques 1998年第2期9卷 121-123页

作者： Liu Guo-Zheng Liu Fei Miao Zeng-Xing Wang Yi-Shan and Fang Ji-Dong (Isotope department, China institute of {2. energy, beijing 102.13. Isotope department China Institute of Atomic Energy Beijing 102413 China

The protective ability of ascorbic acid(Vc) on stannous ion and the influence of light irradiation on the stability of stannous ion in diphosphonate medium at pH=5 have been examined in order to attain minimal loss of stannous ion during the production of lyophilized radiopharmaceutical *** sum of stanous ion and Vc was determined with iodometric *** was shown that the protective ability of Vc was still strong at Vc concentration much lower than that of stannous ion and the illumination by fluorescent lamp was unfavorable to the stability of stannous *** change of pH in the range 3-9 did not affect the action of Vc significantly.

关键词：锡离子稳定性骨造影工具

Microscopic Calculation of Parameters of the sdg Interacting Boson Model for ^(104-110)Pd Isotopes

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Chinese journal of nuclear physics 1995年第3期17卷 194-199页

作者： Liu Yong~1 Shi Zhu-yi~2.Dan Han-jou~3 Sang Jian-ping~41 institute of Particle physics,Huazhong Normal University,Wuhan 4300702.{2. of physics,Guizhou institute for Nationalities,Guiyang 55002.3 {2. of physics,Xianning Teacher’s College,Xianning 4370004 {2. of physics,Wuhan University,Wuhan 430072 华中师范大学粒子物理所湖北武汉贵州民族学院物理系贵州贵阳 550025 咸宁师范高等专科学校物理系湖北咸宁 437000 武汉大学物理系湖北武汉

The parameters of the sdg interacting boson model Hamiltonian are calculated for the 104-110*** calculations utilize the microscopic procedure based on the Dyson boson mapping proposedby Yang-Liu-Qi and extended to include the g boson *** calculated parameters reproduce thosevalues from the phenomenological *** resulting spectra are compared with the experimental spectra.

关键词： sdg interacting boson model Dyson boson mapping Microscopic investigation

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AR模型预测误差比在地震事件识别中的应用

数据采集与处理 2004年第4期19卷 446-449页

作者：唐恒专清华大学工程物理系

根据天然地震与核爆地震信号的 P波差异 ,提出了基于 AR模型预测误差比的地震信号分类和识别方法。该算法首先应用 AR模型对地震信号 P波初至时段及其后一时段进行建模 ,分别求出其预测误差 ,从而计算得出 P波的预测误差比 ,然后利用预... 详细信息

根据天然地震与核爆地震信号的 P波差异 ,提出了基于 AR模型预测误差比的地震信号分类和识别方法。该算法首先应用 AR模型对地震信号 P波初至时段及其后一时段进行建模 ,分别求出其预测误差 ,从而计算得出 P波的预测误差比 ,然后利用预测误差比作为特征判据对地震信号进行分类与识别。对 2.0次地震时间的分类和识别实验结果表明 ,本文方法能够对天然地震及核爆地震两类事件进行有效的分类与识别。

关键词：地震信号 P波天然地震地震事件预测误差时段 AR模型识别建模算法

Variational calculation of the Intrashell 2.^2.~3P^e State for Heliumlike F^( 7+) ion

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原子与分子物理学报 2000年第4期17卷 743-747页

作者： GUANG Xiao xu 1, WANG Zhi wen(Z.W.Wang) 2.1.Wuhan institute of physics and Mathematics, Chinese Academy of Science, Wuhan 430071 2.{2. of physics,Liaoning Normal University, Dalian 11602.) 中科院武汉物理与数学所湖北武汉 430071 辽宁师范大学辽宁大连 116029

Doubly excited intrashell 2. 2.3P e state in heliumlike F 7+ ion is calculated by using the modified configuration interaction wave function. Using the modified Slater type wave function having up to 362.terms, the energy position of the discrete 2. 2.3P e state in F 7+ is determined to be -18.812.62. 78 a.u., Several expectation values of r i,r -1 12.and r 12.are also given in the present work. The present results indicate that the modified Slater type wave function in which r coordinates are incorporated is effective and powerful for the description of the 2. 2.3P e state showing strong correlation effect in two electron systems.

关键词：变分计算壳层氟离子氦状态

Study of the primordial lithium abundance

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Science China(physics,Mechanics & Astronomy) 2011年第S1期54卷 67-72页

作者： LI ZhiHong1, LI ErTao1, SU Jun1, LI YunJu1, BAI XiXiang1, GUO Bing1, WANG YouBao1, CHEN YongShou1, HOU SuQing1, ZENG Sheng1, LIAN Gang1, SHI JianRong2.& LIU WeiPing1 1 China institute of atomic {2., beijing 102.13. China 2.ational Astronomical Observatories, Chinese Academy of Sciences, beijing 100012. China China Inst Atom energy Beijing 102413 Peoples R China Chinese Acad Sci Natl Astron Observ Beijing 100012 Peoples R China

Lithium isotopes have attracted an intense interest because the abundance of both 6Li and 6Li from big bang nucleosynthesis (BBN) is one of the puzzles in nuclear astrophysics. Many investigations of both astrophysical observation and nucleosynthesis calculation have been carried out to solve the puzzle, but it is not solved yet. Several nuclear reactions involving lithium have been indirectly measured at China institute of atomic energy, beijing. The Standard BBN (SBBN) network calculations are then performed to investigate the primordial Lithium abundance. The result shows that these nuclear reactions have minimal effect on the SBBN abundances of 6Li and 7Li.

关键词： big bang nucleosynthesis element abundance nuclear reaction network

Magnetic properties of small Fe clusters: a nonorthogonal Hamiltonian study

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原子与分子物理学报 2000年第4期17卷 583-588页

作者： REN Yun 1,2.,SUN hou qian 1,2., WANG Bao lin 1, LUO You hua 1, WANG Guang hou 1(1. National Laboratory of Solid State Microstructures and department of physics, Nanjing University, Nanjing 2.0093 2.Yancheng {2. of Technology, Jia 南京大学固体微结构物理国家重点实验室江苏南京 210093

We calculate the magnetic properties of small Fe N clusters( N =2.7,9,13,15) by using a parameterized Hubbard tight binding spd band model Hamiltonian, with the parameters obtained from nonorthogonal Hamiltonian parameters. the average magnetic moments, and the spin polarized charge distribution within clusters are in agreement with those obtained by first principle and tight binding calculations. The effect of the nonorthogonal basis is discussed.

关键词：铁团磁性 Hubbard模型

π~±Elastic Scattering and Excitation Function of Pion SCX Reaction on ^(13)C

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Chinese journal of nuclear physics 1997年第3期19卷 142-146页

作者： Ren Yongjian~(1,2. Gu Jianzhong~1) Lei Yian~1) Zeng Guomo~(1,3)1)institute of Theoretical physics,the Chinese Academy of Sciences,P.O.Box 2.35,{2. 1000802.Teaching and Research Section of physics,Agriculture University of China,{2. 1000833)department of physics,Jiliu University,Changchun 13002. 中科院理论物理所北京

The elastic scattering of 162.MeV л± from 13C and the excitation function of 13C（л+,л0）13N are analyzed in the frame of the Glauber *** nuclear wave function is assumedto be constructed by a valence nucleon plus a core of 12./sup>C which is described by an independent αcluster model.A good agreement between the theory and experiment is obtained.

关键词： Glauber theory α cluster model Scattering cross section Excitation function

Density functional theory study on the structural and electronic properties of Ag-adsorbed (MgO)_n clusters

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Science China(physics,Mechanics & Astronomy) 2009年第5期52卷 734-741页

作者： GE GuiXian1, JING Qun1 & LUO YouHua2.3 1 Key Laboratory of Ecophysics and department of physics, Normal College, Shihezi University, Shihezi 832.03, China 2.School of Science, East China University of Science and Technology, Shanghai 2.02.7, China 3 institute for Theoretical physics, Henan University, Kaifeng 475004, China Key Laboratory of Ecophysics and department of physics Normal College Shihezi University Shihezi 832003 China School of Science East China University of Science and Technology Shanghai 200237 China institute for Theoretical physics Henan University Kaifeng 475004 China

Equilibrium geometries, charge distributions, stabilities and electronic properties of the Ag-adsorbed (MgO)n (n = 1-8) clusters have been investigated by density functional theory (DFT) with generalized gradient approximation (GGA) for exchange-correlation functional. The results show that hollow site is energetically preferred for n≥4, and the incoming Ag atoms tend to cluster on the existing Ag cluster. The Mulliken populations indicate that the interaction between the Ag atom and Magnesia clusters is mainly induced by a weak atomic polarization. The adsorbed Ag atom only causes charge redistributions of the atoms near itself. The effect of the adsorbed Ag atom on the bonding natures and structural features of Magnesia clusters is minor. Furthermore, the investigations on the first energy difference, fragmentation energies and electron affinities show that the Ag(MgO)4 and Ag(MgO)6 are the most stable among studied clusters.

关键词： Ag (MgO)_n clusters geometries electronic properties

Estimation of Soot and Airborne Radionuclide Emission Factors from Coal-Fired Power Plants in China

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Estimation of Soot and Airborne Radionuclide Emission Factor...