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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 atomic energy, beijing 102413) 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

Measurement of ^(79)Se by accelerator mass spectrometry using projectile X-ray technique

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Nuclear Science and Techniques 2000年第1期11卷 1-5页

作者： HE Ming JIANG Shan JIANG Song-Sheng WU Shao-yong Zhao Zhan-Xia Dong Yue-An(china.institute of atomic energy, beijing 102413) 中国原子能科学院北京 102413

In order to carry out the measurement of heavy nuclei in accelerator mass spectrometry, characteristic X-rays of the incident projectile have been explored and used as a method for isobar discrimination. The projectile X-ray combined with AMS technique has been set up in china.institute of atomic energy. The measurement of 79Se was performed by resorting to the projectile X-ray AMS technique and the detection sensitivity of 79Se was improved more than 2 orders of magnitude. The detection limit was about 3.6x 10-9 for 79Se/Se.

关键词： X射线技术硒79 重核原子核测量 AMS 加速器质谱

Analytic Solution of a Two-Level Model Coupled by Y_(5,μ)Field

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Chinese journal of nuclear physics 1995年第2期17卷 142-148页

作者： Zhang Xi-zhen Dong Bao-guo liu Bin(china.institute of atomic energy,P.O.Box 275,beijing 102413) 中国原子能科学院北京

An analytic solution of a two-level model coupled by Y5μ field was given inthe limit of large angular momentum 11.

关键词： Two-level model Y5μ-deformation Metallic clusters

Brownian ratchets driven by flashing noise strength

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Chinese Science Bulletin 1999年第21期44卷 1956-1961页

作者： ZHAO Tongjun, ZHAN yong, ZHUO Yizhong and WU XizhenDepartment of Applied Mathematics and Physics , Hebei University of Technology , Tianjin 300130, china.china.institute of atomic energy, beijing 102413, china.institute of Theoretical Physics, Chinese Academy of Sciences , beijing 100080, china.Corresponding author Department of Applied Mathematics and Physics Hebei University of Technology Tianjin China china.institute of atomic energy Beijing China institute of Theoretical Physics Chinese Academy of Sciences Beijing China

The stochastic transport driven by flashing multi-noise sources in a ratchet is studied. The stationary current versus the noise strength and the colored noise correlated time T is obtained . At a fixed flip rate and strength of the colored noises, the novel phenomenon of the current reversal occurs as T reaches a certain value. More than one reversal point exists when

关键词： flashing force ratchet current reversal Langevian equation.

Neutron halo state of ^(13)C

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Chinese Science Bulletin 2001年第1期46卷 43-45页

作者： liu Zuhua, liN Chengjian, li Zhichang, ZHANG Huanqiao, CHEN Baoqiu, MA Zhongyu, WU Yuewei, liu Jiancheng & li Shuyuanchina.institute of atomic energy, beijing 102413, china china.institute of atomic energy Beijing China

Angular distributions for the 12C(d, p)13C transfer reactions have been measured at Ed = 11.8 MeV, and compared with those of the DWBA calculations. By means of this comparison, density distributions of the last neutron in the ground state and the first 1/2+ state of 13C are extracted. The properties of these states in 13C have also been studied in the framework of the nonlinear relativistic mean-field theory with NL-SH parameters. It is found that the first l/2+ state in 13C is a neutron halo state shown by both the experimental and theoretical density distributions of the last neutron.

关键词： transfer reaction DWBA relativistic mean-field theory nucleon density distributions neutron halo of excited state.

Correlations Between the Conditional Moments in ^(16)O and ^(32)S Fragmentation at High energy

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Chinese journal of nuclear physics 1995年第1期17卷 13-16页

作者： liu Fu-hu (institute of High energy Physics,Chinese Academy of Sciences,beijing 100039)Sun Han-cheng (china.institute of atomic energy,B.O.Box 275(94),beijing 102413) institute of High energy Physics Chinese Academy of Sciences Beijing 100039 asteur.fr

The conditional moments of the charge distributions of the projectile frag-ments in 16O and 32S fragmentation behaviour are obtained by using a partition *** logarithmic correlations between the conditional moments are observed,Thecalculated results are in agreement with the experimental data of 3.7 and 200GeV N 16O-emulsion and 200 GeV/N 32S-emulsion interactions.

关键词： Projectile fragment Charge distribution Conditional moment Logarithmic correlation

Track Fading and Its Applications in Archaeology, Tectonics and Geothermal Chronology in china

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Journal of Earth Science 2013年第4期24卷 645-651页

作者：郭士伦袁万明陈宝流黄慰文刘顺生 Department of Nuclear Physics China Institute of Atomic Energy School of Earth Sciences and Resourses China University of Geosciences Department of Radioisotopes China Institute of Atomic Energy institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences Guangzhou institute of Geochemistry Chinese Academy of Sciences

Track fading is a basic phenomenon in track science and has been the source of informa- tion in geosciences. This article summarizes the knowledge of track fading and gives some examples of successful applications of track fading in archaeology, tectonics and geothermal chronology in china. The applications of track fading are classified into 5 modes：（1） mode of complete fading （annealing）; （2） mode of partial fading; （3） use of the dependence of track fading on time and temperature; （4） use of the differences of track fading between coexisting minerals; and （5） use of fading-reduced track length. Track fading mechanisms hints that scientists in geothermal chronology should adopt microprobes for quantitative elemental analysis to determine the detailed chemical compositions of each mineral grain or at least of the grains from each position of geological structures in order that one becomes well aware of the relation between the track fading behavior and chemical compositions of the mineral used.

关键词： track fading archaeology tectonics geothermal chronology.

Optimal reactions for the synthesis of superheavy nucleus ^(270)Hs

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Science china.Physics,Mechanics & Astronomy) 2006年第6期49卷 641-648页

作者： liu Zuhua1,3 & BAO Jingdong1,2 1. Key Laboratory of Beam Technology and Material Modification of Ministry of Education, beijing Normal University, beijing 100875, china.2. Physics Department, beijing Normal University, beijing 100875, china.3. china.institute of atomic energy, beijing 102413, china Key Laboratory of Beam Technology Material Modification of Ministry of Education Beijing Normal University Beijing 100875 China Physics Department Beijing Normal University Beijing 100875 China china.institute of atomic energy Beijing 102413 China

The superheavy nucleus 270Hs is expected to be a “double-magic” deformed nucleus. We have calculated its cross sections of evaporation residue for the reactions 248Cm(26Mg,4n)270Hs, 244Pu(30Si,4n)270Hs, 238U(36S,4n)270Hs and 226Ra(48Ca,4n)270Hs using a two-parameter Smoluchowski equation. It is found from our results that 226Ra(48Ca,4n)270Hs and 238U(36S,4n)270Hs are two optimal reactions for the synthesis of the superheavy nucleus 270Hs due to their large negative Q-values.

关键词： diffused fusion barrier,Smoluchowski equation,superheavy nuclei.

Tungsten-182 Mssbauer experiments at liquid nitrogen temperature

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Chinese Science Bulletin 2001年第9期46卷 732-734页

作者： HUANG Runsheng, liu Bing, ZHANG Jinrong, liu Cong & GAO Xuekui1. Physics Department of Nanjing University, Nanjing 210093, china.2. china.institute of atomic energy, beijing 102413, china Physics Department of Nanjing University Nanjing China china.institute of atomic energy Beijing China

A good 182Ta Mossbauer source and an apparatus designed specially were made. 182W transmission Mossbauer experiments were successfully carried out, both of the source and absorber at liquid nitrogen temperature. It wa... 详细信息

关键词： Mossbauer effect 182W Mossbauer effect.