检索结果-南通市图书馆

Experimental Study of Highly Ionized Spectra of Titanium

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

IMP & HIRFL Annual Report 2004年 135-136页

作者： Yang Zhihu, Du Shubin, Su Hong, Zhang Yanping, Ren Shouting and Zeng Xiantang china institute of atomic energy, beijing 102413. china.

The spectra of highly charged titanium ions produced by the interaction of 120 MeV titanium ions with carbon foil were investigated with the so-called beam-foil technique using the HI-13 tandem accelerator in china institute of atomic energy. Spectral lines emitted from fifty-three excited energy levels were observed in the

关键词：

Neutron Diffraction Studies of the Magnetic Structure of Ho_2Fe_9Ga_(8～x)Alx

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese journal of nuclear physics 1997年第1期19卷 44-47页

作者： Chen Dongfeng Gou Cheng Sun Kai china institute of atomic energy,P.O.Box 275-30,beijing 102413.an Qiwei Zhang Panlin Shen Baogen Cheng Zhaohua State Key Laboratory of Magnetism,Intstitute of Physics,the Chinese Academy of Sciences,P.O.Box 603,beijing 100080 ***

The crystallographic and magnetic structures of Ho2Fe9Ga8～xAlx（x=2,4 and 6）arestudied by powder neutron diffraction at room *** atom fractional occupancies ofGa and AI and the atom magnetic moments of Ho and Fe are obtained by Rietveld *** magnetic structure of the phase with x=2 shows an easy-axis anisotropy and themagnetic moments of all atoms are parallel to c *** saturation magnetization and Curietemperatures of samples with x in the range 0～8 are investigated.

关键词： Neutron diffraction Magnetic structure

A Quasiquantum Model for Calculating Multistep Direct Reactions of Continuum and Discrete Levels

在线全文

学校读者我要写书评

暂无评论

Chinese journal of nuclear physics 1995年第1期17卷 52-59页

作者： Shen Qing-biao Zhang Jing-shang (china institute of atomic energy,P.O.Box 275(41),beijing 102413. china institute of atomic energy P. O. Box 275(41) Beijing 102413 ***

A method for calculating multistep direct reactions for both continuum anddiscrete levels is *** energy-angle correction scattering kernel is adopted forcontinuum and discrete levels in the semiclassical approach,in which the angular mo-mentum and parity conservations are *** Legendre coefficients of the angu-lar distributions are calculated based on one-step distorted wave Born approximation instead of nucleon-nucleon scattering expressions in nuclear *** calculateddiscrete level neutron angular distributions of 11B（p,n0）11C reaction and the cross sec-tions of11B（p,n0）11C and 11B（p,n）11C reactions reproduce the experimental data *** approach can also be used for composite particle emissions.

关键词： QMSD DWBA Discrete level

Study of the primordial lithium abundance

在线全文

学校读者我要写书评

暂无评论

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 energy, beijing 102413. china 2National Astronomical Observatories, Chinese Academy of Sciences, beijing 100012, china china institute of atomic energy Beijing China (GRID:grid.410655.3) (ISNI:***) Chinese Academy of Sciences National Astronomical Observatories Beijing China (GRID:grid.9227.e) (ISNI:***)

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

Synchronizing spatiotemporal chaos in the coupled map lattices using nonlinear feedback functions

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 1997年第3期 1-7页

作者： Fang Jin Qing ( china institute of atomic energy, beijing 102413. M K Ali △ ( Department of Physics, The University of Lethbridge,Lethbridge, Alberta T1K 3M4, Canada) chinainstituteofatomicenergy Beijing102413 DepartmentofPhysicsTheUniversityofLethbridgeLethbridgeA

ＳｙｎｃｈｒｏｎｉｚｉｎｇｓｐａｔｉｏｔｅｍｐｏｒａｌｃｈａｏｓｉｎｔｈｅｃｏｕｐｌｅｄｍａｐｌａｔｉｃｅｓｕｓｉｎｇｎｏｎｌｉｎｅａｒｆｅｄｂａｃｋｆｕｎｃｔｉｏｎｓＴｈｅｗｏｒｋｉｓｓｕｐｐｏｒｔｅｄｂｙｆｕ... 详细信息

ＳｙｎｃｈｒｏｎｉｚｉｎｇｓｐａｔｉｏｔｅｍｐｏｒａｌｃｈａｏｓｉｎｔｈｅｃｏｕｐｌｅｄｍａｐｌａｔｉｃｅｓｕｓｉｎｇｎｏｎｌｉｎｅａｒｆｅｄｂａｃｋｆｕｎｃｔｉｏｎｓＴｈｅｗｏｒｋｉｓｓｕｐｐｏｒｔｅｄｂｙｆｕｎｄｉｎｇｔｏＦａｎｇＪｉｎＱｉ...

关键词： Nonlinear feedback functions Synchronization Spatiotemporal chaos Coupled map lattices Noise effect

Neutron　Diffraction　Study　on　Structure　of　α－LiIO_3　Single　Crystal　under　DC　Voltage

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 1995年第6期 11-14页

作者： Cheng Yu-Fen Yang Zhen Cheng Zhi-Xu Guo Li-Ping(china institute of atomic energy,beijing 102413.E.Legrand(SCK/CEN Boeretang 200 B-2400 Mol,Belgium)

A detailed investigation of anisotropy of neutron diffraction intensity enhancement observed in α-LiIO-3 single crystal under a DC field was carried out on a Four-Circle Neutron Diffractometer installed at the BR2 reactor in Belgium and CIAE *** was found that the intensity increase must be ascribed to small displacements of oxygen and iodine atoms rather than the explanation which is only based on changes in the defect of the crystal structure,since the movement of lithium atom to interstitial sites or holes in the crystal may cause displacement of the other atoms.

关键词： neutron diffraction single crystal structure α-LiIO3

BRIF and CARIF progress

在线全文

学校读者我要写书评

暂无评论

Science china(Physics,Mechanics & Astronomy) 2011年第S1期54卷 14-17页

作者： LIU WeiPing, LI ZhiHong, BAI XiXiang, WANG YouBao, GUO Bing, PENG ChaoHua, YANG Yi, SU Jun, CUI BaoQun, ZHOU ShuHua, ZHU ShengYun, XIA HaiHong, GUAN XiaLing, ZENG Sheng, ZHANG HuanQiao, CheN YongShou, TANG HongQing, HUANG Li & FENG BeiYuan china institute of atomic energy, P. O. Box 275(1), beijing 102413. china china institute of atomic energy Beijing China

china institute of atomic energy (CIAE) is currently constructing beijing rare ion beam facility (BRIF) and is proposing china advanced rare ion beam facility (CARIF). This paper is aiming at introducing the progress of BRIF project and the con ceptual design CARIF. The ISOL type facility BRIF under construction is composed of a 100 MeV 300 ?A proton cyclotron, an ISOL with mass resolution of 20000, and a super-conducting LINAC of 2 MeV/q, and will be commissioned in 2013. CARIF facility proposed is planned to use both ISOL and PF techniques. It is based on a china advanced research reactor CARR that was critical, with ISOL separation of fission fragment, post acceleration to 150 MeV/u, and fragmentation of neu tron-rich fission fragment beam like 132Sn. Such unique combination will allow CARIF to deliver beam intensity better than the best world facilities by more than one order of magnitude.

关键词： rare ion beam ISOL PF

Photoionization Cross Section and Resonance Structure of Mn+

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2006年第5期45卷 911-913页

作者： LU Peng-Fei,~1 LIU Jin-Chao,~2 and YANG Xiang-Dong~2 ~1 School of Science, beijing University of Posts and Telecommunication, beijing 100876, china ~2 institute of atomic and Molecular Physics, Sichuan University, Chengdu 610065, china School of Science Beijing University of Posts and Telecommunication institute of atomic and Molecular Physics Sichuan University

A photoionization cross section calculation of Mn;is performed in the formalism of many-body perturbation theory for photon energies ranging from 48 eV to 56 eV. We consider excitations from the 3p, 3d, and 4s subshells. The effects of the strong 3p→3d and 3p→4s transitions are included as resonant contributions to the total cross sections. Good agreement with experiment is found.

关键词： many-body perturbation theory effective single-particle potential generalized resonance method

NEUTRON DIFFRACTION STUDY ON R_2Fel_(17)N_x(R=Y,Dy,Nd)

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 1993年第11期6卷 345-348页

作者： YANG Jilian ZHANC Baisheng DINC Yongfan china institute of atomic Engergy,beijing,chinaYANG Yingchang ZHANG Xiaodong Peking University,beijing,chinaPAN Shuming General Research institute for Non-Ferrous Metals,beijing,china associate professor,P.O.Box 275,Branch No.30,beijing 102413.china

The N occupying sites and magnetic structures in R_2Fe_(17)N_x(R=Y,Dy,Nd)are de- termined by neutron *** effects of the site occupation of N on magnetic properties are discussed primarily.

关键词： neutron diffraction Curie temperature permanent magnet (Y Dy Nd)_2Fe_2N_x