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Trace tritium recovery from the residue of liquid Li_(17)Pb_(83) alloy

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Science china Chemistry 2010年第8期53卷 1825-1828页

作者： XIE Bo,YANG TongZai & WENG KuiPing Institute of nuclear physics and Chemistry,china Academy of Engineering physics,Mianyang 621900,china Institute of nuclear physics and Chemistry China Academy of Engineering Physics Mianyang China

The liquid Li17Pb83 alloy is a prominent breeder material for use in a fusion *** the design of an effective tritium extraction system for the liquid lithium lead bubbler of the test blanket module of such a reactor,finding ways to strictly limit the losses of tritium and to minimize radioactive risks is very *** this purpose,the isotope exchange process has been investigated as a means of trace tritium recovery from a model of the residue from Li17Pb83 *** results indicate that the isotope exchange process is an effective means of tritium recovery from the residue of Li17Pb83 alloy,and the optimum composition of the exchange carrier gas is He + 0.1% *** exchange temperature and number of exchange steps are the main factors influencing the efficiency of tritium recovery from the *** tritium recovery efficiency increases with increasing exchange temperature and number of times of *** recovery efficiency can approach 80% when the residue is treated six times at 823 K.A gas-liquid two-phase contact model to describe the proceeding of tritium release from the liquid Li17Pb83 alloy has been derived on the basis of this experiment.

关键词： Li17Pb83 alloy tritium recovery isotope exchange carrier

Evaluation and Calculation of Activation Cross Sections for 169Tm(n,2n), (n,3n), (n,γ) and (n,x) Reactions Below 20 MeV

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中国核科技报告 1997年第S3期 72-79页

作者： Yu Baosheng (china nuclear Data center, CIAE)Tang Guoyou Shi Zhaomin (Institute of heavy ion physics, Peking University)

IntroductionTm is a rare-earth element. Its activation cross sections are a good indicator for nuclear science and technology applications. However, there are no evaluated data in several nuclear data libraries. The activation cross sections forTm(n,2n), (n,3n), (n,γ) and some emission charged particle (n,x) reactions below 20 MeV were evaluated and calculated on the basis of experimental and theoretical data.

关键词： Evaluation and Calculation of Activation Cross Sections for Tm n,2n n,3n n,x Reactions Below 20 MeV and

Multiparty quantum secret sharing of classical and quantum messages

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Progress in Natural Science:Materials International 2007年第1期17卷 26-31页

作者： CHEN Pan, DENG Fuguo and LONG Guilu ( Key laboratory for Quantum Information and Measurements, and Department of physics, Tsinghua University, Beijing 100084, china Key laboratory of Beam Technology and Material Modification, MOE, Institute of Low Energy nuclear physics, and Department of Material Science and Engineering, Beijing Normal University, Beijing 100875, china Beijing Radiation center, Beijing 100875, china Key laboratory for Atomic and Molecular Nano-Sciences, Tsinghua University, Beijing 100084, china) Key laboratory for Quantum Information and Measurements Department of Physics Tsinghua University Beijing 100084 China Key laboratory of Beam Technology and Material Modification Beijing Normal University Beijing 100875 China Institute of Low Energy nuclear physics Department of Material Science and Engineering Beijing Normal University Beijing 100875 China Beijing Radiation center Beijing 100875 China Key laboratory for Atomic and Molecular Nano-Sciences Tsinghua University Beijing 100084 China

A scheme for multiparty quantum secret sharing of classical and quantum messages is proposed by using entanglement swapping. This scheme can distribute not only the classical information but also the quantum informati... 详细信息

关键词： quantum secret sharing classical message quantum message EPR pair.

Properties of nuclear Matter in A Nonlinear Realized Approach of the SU(2) Chiral Symmetry Spontaneous Breaking

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Properties of Nuclear Matter in A Nonlinear Realized Approac...

fMRI time series analysis based on stationary wavelet and spectrum analysis

CCAST“第二届粒子物理、核物理及宇宙学前沿问题”研讨会

作者： Xiao-Fu Lu , Bao-Xi Sun, Yu-Xin Liu, Hua Guo, En-Guang Zhao Institute of theoretical physics, The Chinese Academy of Sciences, Beijing 100080, china Department of physics, Sichuan University, Chengdu 610064, china School of physics, Peking University, Beijing 100871, china Institute of High Energy physics, The Chinese Academy of Sciences, P.O. Box 918(4),Beijing 100039, china center of theoretical nuclear physics, national laboratory of heavy ion accelerator, lanzhou 730000, china

A nonlinear realization of SU(2) chiral symmetry spontaneous breaking approach is developed in the composite operator formalism. The properties of nuclear matter, the pion and the quark condensates in nuclear matter are evaluated. The calculated results show that the saturation properties of nuclear matter can be reproduced well with the approach. Meanwhile, the expectation value of (?)2 becomes nonzero in the nuclear matter with minimal density pN - 0.235/m-3, and the quark condensate decreases monotonously with the increasing of the nuclear matter density. It indicates that the chiral symmetry is restored gradually as the nuclear matter density increases.

关键词： net Chiral Symmetry Spontaneous Breaking Properties of nuclear Matter in A Nonlinear Realized Approach of the SU

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Progress in Natural Science:Materials International 2006年第11期16卷 1171-1176页

作者： ZHI Lianhe~ 1,2,3 , ZHAO Xia~4, SHAN Baoci~1**, PENG Silong~5, YAN Qiang~1, YUAN Xiuli~1 and TANG Xiaowei~ 1,6 (1. Key laboratory of nuclear Analysis Techniques, Institute of High Energy physics, Chinese Academy of Sciences, Beijing 100049, china 2. Graduate School of Chinese Academy of Sciences, Beijing 100049, china 3. Department of physics, Zhoukou Normal University, Zhoukou 466100, china 4. Research Imaging center, University of Texas Health Science center, San Antonio, Texas 78229, USA 5. national ASIC Design and Engineering center, Institute of Automation, Chinese Academy of Sciences, Beijing 100049, china 6. Department of physics, Zhejiang University, Hangzhou 310027, china) Key laboratory of nuclear Analysis Techniques Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China Graduate School of Chinese Academy of Sciences Beijing 100049 China Department of physics Zhoukou Normal University Zhoukou 466100 China Research Imaging center University of Texas Health Science Center San Antonio TX 78229 United States national ASIC Design and Engineering center Institute of Automation Chinese Academy of Sciences Beijing 100049 China Department of physics Zhejiang University Hangzhou 310027 China

The low signal to noise ratio (SNR) of functional MRI (fMRI) prefers more sensitive data analysis methods. Based on stationary wavelet transform and spectrum analysis, a new method with high detective sensitivity was developed for analyzing fMRI time series, which does not require any prior assumption of the characteristics of noises. In the proposed method, every component of fMRI time series in the different time-frequency scales of stationary wavelet transform was discerned by the spectrum analysis, then the components from noises were removed using the stationary wavelet transform, finally the components of real brain activation were detected by cross-correlation analysis. The results obtained from both simulated and in vivo visual experiments illustrated that the proposed method has much higher sensitivity than the traditional cross-correlation method.

关键词： fMRI stationary wavelet transform spectrum analysis data analysis.

An Extended Subequation Rational Expansion Method and Solutions of (2+1)-Dimensional Cubic Nonlinear Schr(?)dinger Equation

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Communications in theoretical physics 2007年第12期48卷 987-992页

作者： GUO Wei-Ming~1 LI Biao~(1,3)and CHEN Yong~(1,2,3)~1 Nonlinear Science center and Department of Mathematics,Ningbo University,Ningbo 315211,china~2 Institute of theoretical Computing,East china Normal University,Shanghai 200062,china~3 Key laboratory of Mathematics Mechanization,the Chinese Academy of Sciences,Beijing 100080,china Nonlinear Science center and Department of Mathematics Ningbo University Ningbo 315211 China Key laboratory of Mathematics Mechanization the Chinese Academy of Sciences Beijing 100080 China Institute of theoretical Computing East China Normal University Shanghai 200062 China

An extended subequation rational expansion method is presented and used to construct some exact,analyt-ical solutions of the (2+1)-dimensional cubic nonlinear Schrdinger *** our results,many known solutionsof the (2+1)-dimensional cubic nonlinear Schrdinger equation can be recovered by means of some suitable selections ofthe arbitrary functions and arbitrary *** computer simulation,the properties of new non-travelling waveand coefficient function's soliton-like solutions,and elliptic solutions are demonstrated by some plots.

关键词： (2+1)-d cubic nonlinear Schrdinger equation soliton solution elliptic function soltuions

A 3.9 V polyanion-type cathode material for Li-ion batteries

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Progress in Natural Science:Materials International 2011年第3期21卷 211-215页

作者： Lei LIU,Bin ZHANG,Xue-jie HUANG Beijing national laboratory for Condensed Matter physics, Institute of physics,Chinese Academy of Sciences,Beijing,100190,china Beijing national laboratory for Condensed Matter physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China

Monoclinic phase LiFeSO4F was synthesized by a simple fast solid state reaction from the mixture of FeSO4·7H2O and LiF pulverized by high energy ball milling.m-LiFeSO4F was confirmed by GITT measurement to be a 3.9 V polyanion-type cathode materials for Li-ion *** electrochemical activity can be enhanced by addition of carbon.A discharge capacity of 105 mA·h/g (70%of theoretical value) was achieved for a m-LiFeSO4F/CNT *** separation behavior during lithium extraction and insertion was observed by ex-situ XRD test.

关键词： LiFeSO4F polyanion cathode Li-ion battery

A 12-bit multichannel ADC for pixel detectors in particle physics and nuclear imaging

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Science china(Technological Sciences) 2010年第5期53卷 1208-1214页

作者： WEI Wei1,2,3,WANG Zheng1,3 & ZHAO JingWei1,3 1 Institute of High Energy physics,Chinese Academy of Sciences,Beijing 100049,china 2 Graduate University of Chinese Academy of Sciences,Beijing 100049,china 3 Key Lab of nuclear Detection Technology and nuclear Electronics of Chinese Academy of Sciences,Beijing 100049,china Institute of High Energy physics Chinese Academy of Sciences Beijing China Graduate University of Chinese Academy of Sciences Beijing China Key Lab of nuclear Detection Technology and nuclear Electronics of Chinese Academy of Sciences Beijing China

Modern pixel detectors in nuclear and particle physics experiments and also in nuclear imaging,starve for highly integrated application specified integrated circuit(ASIC),whereas in china the study of ASIC still stays far away from practical *** lack of ASIC strictly limits the research and development of domestic high energy physics field.A 12-bit multichannel ADC designed for high density readout is introduced as a major candidate for solution.A precise model is discussed and the simulation fully agrees with the model,which indicates a key principle of *** is performed according to the given rule,and novel layout techniques are carried *** results in all aspects are also obtained,showing an excellent real performance,which satisfies the practical requirement.

关键词： application specified integrated circuit high density readout Wilkinson ADC multi-channel ADC

Cyclic Heating-Annealing and Boltzmann Distribution of Free Energies in a Spin-Glass System

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Communications in theoretical physics 2007年第7期48卷 179-182页

作者： ZHOU Hai-Jun Institute of theoretical physics,the Chinese Academy of Sciences,Beijing 100080,china Institute of theoretical physics the Chinese Academy of Sciences Beijing 100080 China

Ergodicity of a spin-glass is broken at low temperatures;the system is trapped in one of many ergodicconfigurational *** between different ergodic domains are achievable through a *** this experiment is repeated infinite times,all ergodic configurational domains will be visited with frequencesthat decreasing exponentially with their free *** mean free energy density of a spin-glass system on a randomgraph is calculated based on this free energy Boltzmann distribution in the present work,by means of the cavity approach.

关键词： spin-glass ergodicity-broken cavity method