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Analyses of p-^(11)B,p-^(11)C and d-^(11)C Reactions

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Chinese journal of nuclear physics 1995年第1期17卷 60-66页

作者： Shen Qing-biao Zhang Jing-shang Han Yin-lu Bai Xi-xiang (china institute of atomic energy,P.O.Box 275(41),beijing 102.13. 中国原子能科学院北京

Aiming at the production of 11C radioactive beam,various nuclear data ofp+11B reaction at incident proton energies spanning 1-25 MeV were obtained by calcu-lation with quasiquantum multistep direct （QMSD） theory and Hauser-Feshbach （HF）*** calculations basically agree with the experimental *** angular distri-butions in lab frame of 11C produced in the reversed geometry reaction 1H(11B,11C)nwere *** cross sections of p+11C and d+11C reactions induced by 11C beamwere also *** results show that the experimental measurement for 11C+d re-action is more feasible than for 11C+p reaction at HI-13 tandem accelerator.

关键词： 11C Radioactive beam Analyses

Evaluation and Testing of Coupled Channel Optical Potentials and Its Parameters for n+238～242Pu and 241,242Am

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中国核科技报告 1999年第S1期 34-41页

作者： Wang Shunuan (china institute of atomic energy, beijing 1024513)

Several sets of coupled channel optical potentials and its parameters for n+238～242Pu and241,242Am below 20 MeV are analyzed and evaluated by direct and compound inelastic scattering cross sections and angular distributions carried out by coupled channel optical model and semi-classical statistical model calculations. The potentials and its parameters recommended to be used in CENDL-3 calculations are presented and discussed.

关键词： ENDF Pu and Evaluation and Testing of Coupled Channel Optical Potentials and Its Parameters for n

NEUMANN SERIES SOLUTION TO A NEUTRON TRANSPORT EQUATION OF SLAB GEOMETRY

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Systems Science and Mathematical Sciences 1993年第1期6卷 13-17页

作者： WANG Zaihua YANG Mingzhu QIN Guoqiang institute of atomic energy,beijing 102.13.china College of Engineer Corps, Nanjing 210007, china 北京原子能所北京南京陆军工程学院江苏南京

This paper deals with the solution to an energy, dependent stationary neutrontransport equation of slab geometry. In L^p space, the equation is converted into an equiva-lent integral equation. By the study of the corresponding integral operator and its spectralradius, results of Neumann series solution are obtained, and an easy-verified condition thatthe transport equation has a nonnegative solution is given.

关键词： Neutron transport equation series solution spectral radius

NONEQUILIBRIUM STATISTICAL TheORY OF FATIGUE FRACTURE(Ⅰ)——The MICROSCOPIC MECHANISM AND STATISTICAL NATURE OF FATIGUE CRACK GROWTH

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Science in china,Ser.A 1986年第10期29卷 1051-1062页

作者：邢修三 institute of atomic energy beijing

In papers (Ⅰ) and (Ⅱ), we try by nonequilibrium statistical concepts and methods to construct a theory of fatigue fracture in connecting mnicroscopic mechanism with macroscopic properties. In this paper the physical picture of fatigue fracture process is described. The stochastic growth equation is given. The dislocation mechanism of growth is discussed. The transport growth rate and fluctuation growth coefficient are obtained, and thus the microcrack distribution function is derived.

关键词： NONEQUILIBRIUM STATISTICAL TheORY OF FATIGUE FRACTURE The MICROSCOPIC MECHANISM AND STATISTICAL NATURE OF FATIGUE CRACK GROWTH length rate exp

Raman Scattering and t-Phase Lattice Vibration of 3% (mole fraction) Y_2O_3-ZrO_2

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Journal of Materials Science & Technology 2004年第5期20卷 485-489页

作者： Xinglun TANG and Xinhua ZheNGSchool of Materials Science and Engineering, beijing institute of Technology, beijing 100081, china Sch. of Mat. Sci. and Eng. Beijing Inst. of Technol. Beijing 100081 China

The Raman spectra of 3% (mole fraction) Y2O3-ZrO2 (3Y) are obtained at different temperature from 77 K to 853 K. The results show that 260 cm-1 Eg and 460 cm-1 Eg modes on the spectra shift toward lower wave number with the increase of temperature; meanwhile, the continuity of the Half Width at Half Maximum (HWHM) and wave number (frequency) of Raman bands are broken and t-phase only partially transforms to m-phase at 523 K. Based on the experimental results, this paper discusses the t-phase lattice vibration of 3Y and presents the images of vibration displacement of six Raman-active modes for t-phase of ZrO2. The analysis indicates that there are diversities existing in the displacement of the atomic vibration of Raman-active modes because of their different symmetries at various temperature, which leads to the different change tendencies of Raman bands. Furthermore, the abrupt changes of some Raman-active modes indicating the atomic displacement are assumed to be the condensations of phonon modes in the t→m phase transition.

关键词： Raman scattering Zirconia Phase transition Condensation of phonon

Analysis of Neutron Double-Differential Cross Section of n+14N at 14.2 MeV

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Communications in Theoretical Physics 2005年第7期44卷 128-132页

作者： YAN Yu--Liang DUAN Jun--Feng SUN Xiao--Jun WANG Ji--Min ZHANG Jing--Shang china institute of atomic energy, P. O. Box 275(41), beijing 102.13. china College of Physics and Information Technology, Guangxi Normal University, Guilin 541004, china china institute of atomic energy P.O. Box 275(41) Beijing 102413 China

By using a new reaction model for light nuclei,the double-differential cross section of n+14N reactions atE_n=14.2 MeV has been *** the case of n+（14）N reactions,the reaction mechanism is cery complex,there areover one hundred opened partial reaction channels even at incident energy En=14.2 *** this paper the openedreaction channels are listed in detail. With LUNF code the model calculation is performed to analyze the double-differential cross sections of total outgoing neutron. The calculated results agree fairly with the experimenal *** indicate that the pre-equilibrium mechanism mechanism dominates the whole reation processes,and the recoil effect in lightnuclear reactions is essentially important.5he emission has been considered,but it is only a small contribution to thedonble-differential cross section at incident energy En=14.2 MeV.

关键词： light nucleus reaction double-differential cross section

The Progress of Researches on ADS in china

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工程科学（英文版） 2007年第4期5卷 51-58页

作者： Zhao Zhixiang,Xia Haihong(china institute of atomic energy,beijing 102.13.china)

The conceptual study of the accelerator driven system(ADS)that lasted for about five years ended in 1999 in *** one project of the National Basic Research Program of china(973 Program)in the energy domain,which is sponsored by the china Ministry of Science and Technology(MOST),a five-year-program of fundamental research of ADS physics and related technology was launched in 2000 and passed national review at the end of *** china institute of atomic energy(CIAE),the institute of High energy Physics(IheP),the institute of heavy Ion Physics in Peking University(PKU-IHIP)and other institutions jointly carried out the *** research activities were focused on HPPA physics and technology,reactor physics of external source driven sub-critical assembly,nuclear data base and material *** HPPA,a high current injector consisting of an ECR ion source,LEBT and an RFQ accelerating structure of 3.5 MeV was *** reactor physics study,a series of neutron multiplication experimental study has been carried out and still being *** VENUS facility has been constructed as the basic experimental platform for neutronics study in ADS ***'s a zero power sub-critical neutron multiplying assembly driven by external neutron produced by a pulsed neutron *** theoretical,experimental and simulation study on nuclear data,material properties and nuclear fuel circulation related to ADS is carrying on to provide the database for ADS system *** main results on ADS related researches will be reported.

关键词： nuclear power ADS transmutation

HIGH RESOLUTION STUDY OF TWINS IN Al_(20)Cu_2Mn_3 PHASE

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Acta Metallurgica Sinica(English Letters) 1992年第4期5卷 227-230页

作者： LI Chunzhi WANG Shuncai JIN Yan institute of Aeronautical Materials,beijing,Laboratory of atomic Imaging of Solids,institute of Metal Research,Academia Sinica,Shenyang,china Inst of Aeronautical Materials Beijing China

The dispersoid phase Al_(20)Cu_2Mn_3 in a 2024 Al alloy is commonly composed of twins,An ob- servation of corresponding high resolution image shows that the twin boundary plane is a glide plane other than mirror *** neighbouring components of twins are not symmetry of re- flection or rotation,but of glide ***“diamond”glide plane is(101)and the glide vector is(1/4)(-).Components of twins in the phase take shape of prism with the longitudinal edge being parallel to[010]and side faces being{101}and{100}.

关键词： twin glide reflection high resolution image Al-Cu-Mn alloy

Theoretical Calculation of Neutron Cross Sections for 176Hf

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中国核科技报告 1997年第S2期 53-58页

作者： Huang Xiaolong Lu Hanlin (china institute of atomic energy, beijing)

Neutron activation cross sections calculation forHf in the neutron energy below 20 MeV is carried out with UNF code. The calculated cross sections for (n,γ), (n,p), (n,α), (n,d), (n,t), (n,2n) and (n,3n) reaction are given. The results of the calculation are compared with the available experimental data and a good agreement is obtained. The calculation is also compared with the relevant evaluation data.

关键词： Theoretical Calculation of Neutron Cross Sections for Hf ENDF