//www.getgobooth.com/ 必威体育下载 daily 15 2024-08-20 10:33:37 apsoffice@iphy.ac.cn apsoffice@iphy.ac.cn 2024-08-20 10:33:37 zh Copyright ©Acta Physica Sinica All Rights Reserved. 京ICP备05002789号-1 Address: PostCode：100190 Phone: 010-82649829，82649241,82649863 Email: apsoffice@iphy.ac.cn Copyright ©Acta Physica Sinica All Rights Reserved apsoffice@iphy.ac.cn 1000-3290 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1894 Author(s): CHEN LU-JUN, LIANG CHANG-HONG <br/><p>A two-parameter soliton cellular automata is proposed. The algebraic expression of soli-ton velocity and soliton fission condition are given. The interaction behavions of solitons and a number of conservative quantities of the system is well analyzed. A new concept, called ‘essential soliton', is introduced and discussed and the application of the properties of the conservative quantities is exhibited.</p> <br/>Acta Physica Sinica. 1993 42(12): 1894-1900. Published 1993-06-05 Author(s): CHEN LU-JUN, LIANG CHANG-HONG <br/><p>A two-parameter soliton cellular automata is proposed. The algebraic expression of soli-ton velocity and soliton fission condition are given. The interaction behavions of solitons and a number of conservative quantities of the system is well analyzed. A new concept, called ‘essential soliton', is introduced and discussed and the application of the properties of the conservative quantities is exhibited.</p> <br/>Acta Physica Sinica. 1993 42(12): 1894-1900. Published 1993-06-05 TWO-PARAMETER SOLITON CELLULAR AUTOMATA CHEN LU-JUN, LIANG CHANG-HONG 1993-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(12): 1894-1900. article doi:10.7498/aps.42.1894 10.7498/aps.42.1894 Acta Physica Sinica 42 12 1993-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1894 1894-1900 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1901 Author(s): LIU LEI, LI JIA-MING <br/><p>Based on the relativistic and non-relativistic self-consistent-field methods, we have calculated the oscillator strength density from 3s state to p-channel states for Li-like atomic ions. The dependence of the oscillator strength density on atomic number and some related relativistic effects are discussed. Using the calculated oscillator strength density as interpolation benchmark points, one can easily obtain oscillator strengthes of all 3s-np transitions for Li-like atomic ions (3≤z≤92).</p> <br/>Acta Physica Sinica. 1993 42(12): 1901-1909. Published 1993-06-05 Author(s): LIU LEI, LI JIA-MING <br/><p>Based on the relativistic and non-relativistic self-consistent-field methods, we have calculated the oscillator strength density from 3s state to p-channel states for Li-like atomic ions. The dependence of the oscillator strength density on atomic number and some related relativistic effects are discussed. Using the calculated oscillator strength density as interpolation benchmark points, one can easily obtain oscillator strengthes of all 3s-np transitions for Li-like atomic ions (3≤z≤92).</p> <br/>Acta Physica Sinica. 1993 42(12): 1901-1909. Published 1993-06-05 THEORETICAL STUDY IN OSCILLATOR STRENGTH DENSITY——Oscillator Strength Density from 3s State to p-Channel States for Li-like Atomic Inos LIU LEI, LI JIA-MING 1993-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(12): 1901-1909. article doi:10.7498/aps.42.1901 10.7498/aps.42.1901 Acta Physica Sinica 42 12 1993-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1901 1901-1909 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1910 Author(s): GAO HAI-BIN, FANG DU-FEI, LU FU-QUAN <br/><p>The C60+ fragmentation caused by electron collision has been studied with a 911A ion source of a mini-separator at the Accelerator Laboratory of Fudan University. The mass spectrum of the fragments has been measured. We found that the fragments contain even number of carbon atoms and the strength of the beam current shows an exponential distribution. Our results show that the fragmentation caused by electron collision has some similarities to that of atomic collision at the energy about 300 keV.</p> <br/>Acta Physica Sinica. 1993 42(12): 1910-1913. Published 1993-06-05 Author(s): GAO HAI-BIN, FANG DU-FEI, LU FU-QUAN <br/><p>The C60+ fragmentation caused by electron collision has been studied with a 911A ion source of a mini-separator at the Accelerator Laboratory of Fudan University. The mass spectrum of the fragments has been measured. We found that the fragments contain even number of carbon atoms and the strength of the beam current shows an exponential distribution. Our results show that the fragmentation caused by electron collision has some similarities to that of atomic collision at the energy about 300 keV.</p> <br/>Acta Physica Sinica. 1993 42(12): 1910-1913. Published 1993-06-05 A STUDY OF C60+ COLLISIONAL FRAGMENTATION GAO HAI-BIN, FANG DU-FEI, LU FU-QUAN 1993-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(12): 1910-1913. article doi:10.7498/aps.42.1910 10.7498/aps.42.1910 Acta Physica Sinica 42 12 1993-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1910 1910-1913 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1914 Author(s): CHEN LU-JUN, LIANG CHANG-HONG, WU HONG-SHI <br/><p>Reflection and transmission spectra of obligue-incident waves at a kind of general contin-uously-Changeable-dimension fractal cantor Layers are investigated. With the self-similarity, a generalized method and formulae as well as a new type of reflection and transmission spectra, i. e. the self-similar spectra, are abbained. This is a new physical phenomena which would find some application.</p> <br/>Acta Physica Sinica. 1993 42(12): 1914-1918. Published 1993-06-05 Author(s): CHEN LU-JUN, LIANG CHANG-HONG, WU HONG-SHI <br/><p>Reflection and transmission spectra of obligue-incident waves at a kind of general contin-uously-Changeable-dimension fractal cantor Layers are investigated. With the self-similarity, a generalized method and formulae as well as a new type of reflection and transmission spectra, i. e. the self-similar spectra, are abbained. This is a new physical phenomena which would find some application.</p> <br/>Acta Physica Sinica. 1993 42(12): 1914-1918. Published 1993-06-05 REFLECTION PROPERTIES OF OBLIGUE-INCIDENT WAVES IN CONTINUOUSLY-CHANGABLE-DIMENSION FRACTAL CANTOR LAYERS CHEN LU-JUN, LIANG CHANG-HONG, WU HONG-SHI 1993-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(12): 1914-1918. article doi:10.7498/aps.42.1914 10.7498/aps.42.1914 Acta Physica Sinica 42 12 1993-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1914 1914-1918 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1919 Author(s): CHEN JIAN-WEN, WANG ZHI-JIANG <br/><p>Principle of electron holography and a new method for producing the electrostatio field specimen are presented. Some dielectric particles supported by a thin carbon film, for example, polystarene latex spheres, 0.31 m in diameter, will become a charged body during the observation in electron microscope because of electrostatic accumulation. Obviously, under the electron beam, the spheres of radius r, acquire a stationary positive charge Q and the resulting field can be simply modelled by that of point charge Q. With the field model, the electrostatic field distribution were observed and the sizes of the charged objects are determined by electron holography.</p> <br/>Acta Physica Sinica. 1993 42(12): 1919-1927. Published 1993-06-05 Author(s): CHEN JIAN-WEN, WANG ZHI-JIANG <br/><p>Principle of electron holography and a new method for producing the electrostatio field specimen are presented. Some dielectric particles supported by a thin carbon film, for example, polystarene latex spheres, 0.31 m in diameter, will become a charged body during the observation in electron microscope because of electrostatic accumulation. Obviously, under the electron beam, the spheres of radius r, acquire a stationary positive charge Q and the resulting field can be simply modelled by that of point charge Q. With the field model, the electrostatic field distribution were observed and the sizes of the charged objects are determined by electron holography.</p> <br/>Acta Physica Sinica. 1993 42(12): 1919-1927. Published 1993-06-05 ELECTRON HOLOGRAPHY AND ITS APPLICATION ON OBSERVATION OF MICRO-ELECTROSTATIC FIELD DISTRIBUTION CHEN JIAN-WEN, WANG ZHI-JIANG 1993-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(12): 1919-1927. article doi:10.7498/aps.42.1919 10.7498/aps.42.1919 Acta Physica Sinica 42 12 1993-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1919 1919-1927 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1928 Author(s): HU XIANG-MING <br/><p>Both nondegenerate Λ-and V-type laser systems can produce lasers without inversion via optical pumping.</p> <br/>Acta Physica Sinica. 1993 42(12): 1928-1932. Published 1993-06-05 Author(s): HU XIANG-MING <br/><p>Both nondegenerate Λ-and V-type laser systems can produce lasers without inversion via optical pumping.</p> <br/>Acta Physica Sinica. 1993 42(12): 1928-1932. Published 1993-06-05 LASERS WITHOUT INVERSION VIA OPTICAL PUMPING HU XIANG-MING 1993-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(12): 1928-1932. article doi:10.7498/aps.42.1928 10.7498/aps.42.1928 Acta Physica Sinica 42 12 1993-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1928 1928-1932 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1933 Author(s): HE SHAO-TANG, CHUNYU SHUTAI, SHEN HUA-ZHONG, YOU YONG-LU, ZHANG QI-REN, DU FENG-YING, GU YUAN-YUAN, YANG SHANG-JIN, HUANG WEN-ZHONG, CAI YU-QIN, KONG LING-HUA, GU YU-QIU, SUN YONG-LIANG, HE AN, LIU SU <br/><p>This paper presents the methods and a part of measurement result about exploration of double exploding foil experiment on inner-shell photoionization X-ray laser scheme. The results show that the line intesities of transitions 3d104p-3d94s2 for Cu-like Pd and Ag ions could be enhanced by the kilovolt pumping X-ray produced in laser-heated NaF and Cu plasmas , but still could not be amplified to form a laser output.</p> <br/>Acta Physica Sinica. 1993 42(12): 1933-1937. Published 1993-06-05 Author(s): HE SHAO-TANG, CHUNYU SHUTAI, SHEN HUA-ZHONG, YOU YONG-LU, ZHANG QI-REN, DU FENG-YING, GU YUAN-YUAN, YANG SHANG-JIN, HUANG WEN-ZHONG, CAI YU-QIN, KONG LING-HUA, GU YU-QIU, SUN YONG-LIANG, HE AN, LIU SU <br/><p>This paper presents the methods and a part of measurement result about exploration of double exploding foil experiment on inner-shell photoionization X-ray laser scheme. The results show that the line intesities of transitions 3d104p-3d94s2 for Cu-like Pd and Ag ions could be enhanced by the kilovolt pumping X-ray produced in laser-heated NaF and Cu plasmas , but still could not be amplified to form a laser output.</p> <br/>Acta Physica Sinica. 1993 42(12): 1933-1937. Published 1993-06-05 INVESTIGATION OF DOUBLE EXPLODING FOIL EXPERIMENT ON INNER-SHELL PHOTOIONIZATION X-RAY LASER SCHEME HE SHAO-TANG, CHUNYU SHUTAI, SHEN HUA-ZHONG, YOU YONG-LU, ZHANG QI-REN, DU FENG-YING, GU YUAN-YUAN, YANG SHANG-JIN, HUANG WEN-ZHONG, CAI YU-QIN, KONG LING-HUA, GU YU-QIU, SUN YONG-LIANG, HE AN, LIU SU 1993-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(12): 1933-1937. article doi:10.7498/aps.42.1933 10.7498/aps.42.1933 Acta Physica Sinica 42 12 1993-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1933 1933-1937 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1938 Author(s): ZHANG WEI-LI, ZHANG RUO-BING, WANG QING-YUE <br/><p>The characteristics of supercontinuum in various nonlinear materials has been investigated with high-gain, Low-dispersion femtosecond amplifier. The wide-band femtosecond laser supercon-tinuum has been obtained.</p> <br/>Acta Physica Sinica. 1993 42(12): 1938-1941. Published 1993-06-05 Author(s): ZHANG WEI-LI, ZHANG RUO-BING, WANG QING-YUE <br/><p>The characteristics of supercontinuum in various nonlinear materials has been investigated with high-gain, Low-dispersion femtosecond amplifier. The wide-band femtosecond laser supercon-tinuum has been obtained.</p> <br/>Acta Physica Sinica. 1993 42(12): 1938-1941. Published 1993-06-05 INVESTIGATION OF CHARACTERISTICS OF WIDE-BAND FEMTOSECOND LASER SUPERCONTINUUM ZHANG WEI-LI, ZHANG RUO-BING, WANG QING-YUE 1993-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(12): 1938-1941. article doi:10.7498/aps.42.1938 10.7498/aps.42.1938 Acta Physica Sinica 42 12 1993-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1938 1938-1941 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1942 Author(s): WEN YANG-JING, FENG YU, FU CHUAN-HONG <br/><p>In this paper, we treat optical soliton propagation with quantum method. We derive the quantum nonlinear Schrodinger equation (QNSE) with corrections by using the micro model of a Kerr-like medium and dispersion relation. We also find the perturbation solution of thisequation and study the influence of corrections on squeezing. The result indicates that thethird-order dispersion has no influence on squeezing and the term in ?/(?τ)(φ+φ2) makes theamount of squeezing decrease.</p> <br/>Acta Physica Sinica. 1993 42(12): 1942-1949. Published 1993-06-05 Author(s): WEN YANG-JING, FENG YU, FU CHUAN-HONG <br/><p>In this paper, we treat optical soliton propagation with quantum method. We derive the quantum nonlinear Schrodinger equation (QNSE) with corrections by using the micro model of a Kerr-like medium and dispersion relation. We also find the perturbation solution of thisequation and study the influence of corrections on squeezing. The result indicates that thethird-order dispersion has no influence on squeezing and the term in ?/(?τ)(φ+φ2) makes theamount of squeezing decrease.</p> <br/>Acta Physica Sinica. 1993 42(12): 1942-1949. Published 1993-06-05 QUANTUM TREATMENT OF OPTICAL SOLITON PROPAGATION WEN YANG-JING, FENG YU, FU CHUAN-HONG 1993-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(12): 1942-1949. article doi:10.7498/aps.42.1942 10.7498/aps.42.1942 Acta Physica Sinica 42 12 1993-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1942 1942-1949 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1950 Author(s): TANG DING-YUAN, LIN XIANG, ZHAO QING-LAN, ZENG WEN-RONG, TAN QI-GUANG, MAO HONG-WEI, ZHONG WEI-ZHUO, HUA SU-KUN <br/><p>A novel type of inclusion—negative crystal in lithium triborate (LBO) crystals,whichis an important new nonlinear optical material,has been observed and investigated by optical microscope,X-ray topography and light scattering topograph. Theirs compositions and nature are made clear and the growth mechanism are also discussed.</p> <br/>Acta Physica Sinica. 1993 42(12): 1950-1955. Published 1993-06-05 Author(s): TANG DING-YUAN, LIN XIANG, ZHAO QING-LAN, ZENG WEN-RONG, TAN QI-GUANG, MAO HONG-WEI, ZHONG WEI-ZHUO, HUA SU-KUN <br/><p>A novel type of inclusion—negative crystal in lithium triborate (LBO) crystals,whichis an important new nonlinear optical material,has been observed and investigated by optical microscope,X-ray topography and light scattering topograph. Theirs compositions and nature are made clear and the growth mechanism are also discussed.</p> <br/>Acta Physica Sinica. 1993 42(12): 1950-1955. Published 1993-06-05 OBSERVATION OF NEGATIVE CRYSTALS IN LITHIUM TRIBORATE SINGLE CRYSTALS TANG DING-YUAN, LIN XIANG, ZHAO QING-LAN, ZENG WEN-RONG, TAN QI-GUANG, MAO HONG-WEI, ZHONG WEI-ZHUO, HUA SU-KUN 1993-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(12): 1950-1955. article doi:10.7498/aps.42.1950 10.7498/aps.42.1950 Acta Physica Sinica 42 12 1993-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1950 1950-1955 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1956 Author(s): QI MING, J. SHIRAKASHI, E. TOKUMITSU, S. NOZAKI, M. KONAGAI, K. TAKAHASHI, LUO JIN-SHENG <br/><p>The growth and electrical properties of carbon doped p-type GaAs and InGaAs grown by metal-organic molecular beam epitaxy (MOMBE) using trimethylgallium (TMG), solid arsenic and solid indium as source materials have been studied systematically. The experimental results show that the growth rate and hole concentration of the samples are affected strongly by growth temperature and molecular beam fluxes,especially for InGaAs epilayers. The mechanism of carbon incorporation and its influence on the properties of the samples were also analysed based on the experimental results. It is shown that the changes in growth rate and hole concentration are mainly due to the dependence of TMG decomposition process on the growth condition.</p> <br/>Acta Physica Sinica. 1993 42(12): 1956-1962. Published 1993-06-05 Author(s): QI MING, J. SHIRAKASHI, E. TOKUMITSU, S. NOZAKI, M. KONAGAI, K. TAKAHASHI, LUO JIN-SHENG <br/><p>The growth and electrical properties of carbon doped p-type GaAs and InGaAs grown by metal-organic molecular beam epitaxy (MOMBE) using trimethylgallium (TMG), solid arsenic and solid indium as source materials have been studied systematically. The experimental results show that the growth rate and hole concentration of the samples are affected strongly by growth temperature and molecular beam fluxes,especially for InGaAs epilayers. The mechanism of carbon incorporation and its influence on the properties of the samples were also analysed based on the experimental results. It is shown that the changes in growth rate and hole concentration are mainly due to the dependence of TMG decomposition process on the growth condition.</p> <br/>Acta Physica Sinica. 1993 42(12): 1956-1962. Published 1993-06-05 MOMBE GROWTH OF CARBON DOPED p-TYPE GaAs AND InGaAs QI MING, J. SHIRAKASHI, E. TOKUMITSU, S. NOZAKI, M. KONAGAI, K. TAKAHASHI, LUO JIN-SHENG 1993-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(12): 1956-1962. article doi:10.7498/aps.42.1956 10.7498/aps.42.1956 Acta Physica Sinica 42 12 1993-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1956 1956-1962 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1963 Author(s): WANG JING, WU XI-JUN, WANG YING <br/><p>The fracture behavior of tilt Cu-Bi tricrystals were studied and a contrast with that of Cu-Bi bicrystals was made. The results indicate that the triple junction affected the fracture behaviors of Cu-Bi tricrystals and made a grain boundary exhibit different fracture modes in bicrystal and tricrystal,The high internal stress near triple junction produced incompatibility of plastic deformation, as well as appearing of inhomogeneity of platic glide and lattice rotation. These are discussed by calculating stress field near triple junction.</p> <br/>Acta Physica Sinica. 1993 42(12): 1963-1957. Published 1993-06-05 Author(s): WANG JING, WU XI-JUN, WANG YING <br/><p>The fracture behavior of tilt Cu-Bi tricrystals were studied and a contrast with that of Cu-Bi bicrystals was made. The results indicate that the triple junction affected the fracture behaviors of Cu-Bi tricrystals and made a grain boundary exhibit different fracture modes in bicrystal and tricrystal,The high internal stress near triple junction produced incompatibility of plastic deformation, as well as appearing of inhomogeneity of platic glide and lattice rotation. These are discussed by calculating stress field near triple junction.</p> <br/>Acta Physica Sinica. 1993 42(12): 1963-1957. Published 1993-06-05 INFLUENCE OF TRIPLE JUNCTION ON THE FRACTURE BEHAVIOR IN COPPER-BISMUTH TILT TRICRYSTAL WANG JING, WU XI-JUN, WANG YING 1993-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(12): 1963-1957. article doi:10.7498/aps.42.1963 10.7498/aps.42.1963 Acta Physica Sinica 42 12 1993-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1963 1963-1957 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1968 Author(s): WEI XING, GONG DA-WEI, YANG XIAO-PING, LU HONG-QIANG, CUI QIAN, SHENG CHI, ZHANG XIANG-JIU, WANG XUN, WANG QIN-HUA, LU FANG, SUN HENG-HUI <br/><p>A stable hydrogen-terminated Si (100) surface was obtained by using a modified mothed. The Si (100) surface was hydrogen passivated during the ex-situ HF-dip followed by the in-situ low-temperature desorption of physisorbed residues. It was found that this procedure is very effective to eliminate the boron spike at the Si MBE layer/p-Si substrate interface. The origon of the boron spike is also discussed.</p> <br/>Acta Physica Sinica. 1993 42(12): 1968-1973. Published 1993-06-05 Author(s): WEI XING, GONG DA-WEI, YANG XIAO-PING, LU HONG-QIANG, CUI QIAN, SHENG CHI, ZHANG XIANG-JIU, WANG XUN, WANG QIN-HUA, LU FANG, SUN HENG-HUI <br/><p>A stable hydrogen-terminated Si (100) surface was obtained by using a modified mothed. The Si (100) surface was hydrogen passivated during the ex-situ HF-dip followed by the in-situ low-temperature desorption of physisorbed residues. It was found that this procedure is very effective to eliminate the boron spike at the Si MBE layer/p-Si substrate interface. The origon of the boron spike is also discussed.</p> <br/>Acta Physica Sinica. 1993 42(12): 1968-1973. Published 1993-06-05 ELIMINATION OF INTERFACIAL BORON SPIKES IN Si MOLECULAR BEAM EPITAXY BY HYDROGEN PASSIVATION TREATMENT OF Si (100) SUBSTRATE WEI XING, GONG DA-WEI, YANG XIAO-PING, LU HONG-QIANG, CUI QIAN, SHENG CHI, ZHANG XIANG-JIU, WANG XUN, WANG QIN-HUA, LU FANG, SUN HENG-HUI 1993-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(12): 1968-1973. article doi:10.7498/aps.42.1968 10.7498/aps.42.1968 Acta Physica Sinica 42 12 1993-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1968 1968-1973 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1974 Author(s): LI JUN-DA, SHEN YAO-WEN, HUANG MEI-CHUN <br/><p>The ground-state properties of Nb(C1-x□x) have been calculated by using a LDF-LM-TO-ASA supercell method. The calculation was performed by quadruple unit-cell such as Nb4C3□0, Nb4C3□1, Nb4C2□2 ,Nb4C1□3 and Nb4C0□4. The equilibrium lattice constant a(x) , bulkmoduli B(x), Debye temperatures θD(x) and heat of formation h (x) obtained from LM-TO calculation were combined with Bernoull's distribution. These results are in agreement with experimental data.</p> <br/>Acta Physica Sinica. 1993 42(12): 1974-1978. Published 1993-06-05 Author(s): LI JUN-DA, SHEN YAO-WEN, HUANG MEI-CHUN <br/><p>The ground-state properties of Nb(C1-x□x) have been calculated by using a LDF-LM-TO-ASA supercell method. The calculation was performed by quadruple unit-cell such as Nb4C3□0, Nb4C3□1, Nb4C2□2 ,Nb4C1□3 and Nb4C0□4. The equilibrium lattice constant a(x) , bulkmoduli B(x), Debye temperatures θD(x) and heat of formation h (x) obtained from LM-TO calculation were combined with Bernoull's distribution. These results are in agreement with experimental data.</p> <br/>Acta Physica Sinica. 1993 42(12): 1974-1978. Published 1993-06-05 A SUPERCELL LMTO-ASA CALCULATION OF GROUND-STATE PROPERTIES OF Nb(C1-x□x) LI JUN-DA, SHEN YAO-WEN, HUANG MEI-CHUN 1993-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(12): 1974-1978. article doi:10.7498/aps.42.1974 10.7498/aps.42.1974 Acta Physica Sinica 42 12 1993-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1974 1974-1978 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1979 Author(s): LIU XIANG-NA, HE YU-LIANG, F. WANG, R. SCHWARZ <br/><p>We employed the constant photo-conductivity method (CPM) to measure the optical absorption spectra of nano-crystalline siilicon films (nc-Si :H) in the energy range of 0. 9-2. 5eV. We analysed some possible major optical transition processes resulting from the photo-conductivity at different photon energy range and the variation of optical absorption spectra while the films were transformed from amorphous silicon into microcrystalline silicon and then nano- crystalline silicon films. We found that the carriers' optical transition and transport process at the interfaces between grains play an important role in the optical absorption spectra in the whole energy range. We make use of the novel structure of nc-Si:H films to explain our experimental results.</p> <br/>Acta Physica Sinica. 1993 42(12): 1979-1984. Published 1993-06-05 Author(s): LIU XIANG-NA, HE YU-LIANG, F. WANG, R. SCHWARZ <br/><p>We employed the constant photo-conductivity method (CPM) to measure the optical absorption spectra of nano-crystalline siilicon films (nc-Si :H) in the energy range of 0. 9-2. 5eV. We analysed some possible major optical transition processes resulting from the photo-conductivity at different photon energy range and the variation of optical absorption spectra while the films were transformed from amorphous silicon into microcrystalline silicon and then nano- crystalline silicon films. We found that the carriers' optical transition and transport process at the interfaces between grains play an important role in the optical absorption spectra in the whole energy range. We make use of the novel structure of nc-Si:H films to explain our experimental results.</p> <br/>Acta Physica Sinica. 1993 42(12): 1979-1984. Published 1993-06-05 A STUDY OF OPTICAL ABSORPTION SPECTRA OF NANO-CRYSTALLINE SILICON FILMS LIU XIANG-NA, HE YU-LIANG, F. WANG, R. SCHWARZ 1993-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(12): 1979-1984. article doi:10.7498/aps.42.1979 10.7498/aps.42.1979 Acta Physica Sinica 42 12 1993-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1979 1979-1984 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1985 Author(s): ZHANG XIAO-JUN, WANG JIN-SONG, XU ZHU-AN, ZHANG QI-RUI <br/><p>Based on data of neutron diffraction measurements, the oxidation states in Y1-xPrxBa2Cu3O7-δ system are determined by bond valence sums (BVS) calculation. It is found that a close correlation between the BVS value of Cu(2) and superconducting critical temperature (Tc) exists. We believe that the increase of Pr content leads to the variation of charge distribution when the content of oxygen remains almost constant. At the same time ,the BVS value of Cu(l) and Cu(2) decreases,while that of Y(Pr) increases,and the holes in CuO2 plane are partly localized in Pr-O bond. The quenching of superconductivity by Pr ions is mainly attributed to this localization of the holes in CuO2 plane by Pr ions.</p> <br/>Acta Physica Sinica. 1993 42(12): 1985-1989. Published 1993-06-05 Author(s): ZHANG XIAO-JUN, WANG JIN-SONG, XU ZHU-AN, ZHANG QI-RUI <br/><p>Based on data of neutron diffraction measurements, the oxidation states in Y1-xPrxBa2Cu3O7-δ system are determined by bond valence sums (BVS) calculation. It is found that a close correlation between the BVS value of Cu(2) and superconducting critical temperature (Tc) exists. We believe that the increase of Pr content leads to the variation of charge distribution when the content of oxygen remains almost constant. At the same time ,the BVS value of Cu(l) and Cu(2) decreases,while that of Y(Pr) increases,and the holes in CuO2 plane are partly localized in Pr-O bond. The quenching of superconductivity by Pr ions is mainly attributed to this localization of the holes in CuO2 plane by Pr ions.</p> <br/>Acta Physica Sinica. 1993 42(12): 1985-1989. Published 1993-06-05 BOND VALENCE CHARACTER AND SUPERCONDUCTIVITY IN Y1-xPrxBa2Cu3O7-δ SYSTEM ZHANG XIAO-JUN, WANG JIN-SONG, XU ZHU-AN, ZHANG QI-RUI 1993-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(12): 1985-1989. article doi:10.7498/aps.42.1985 10.7498/aps.42.1985 Acta Physica Sinica 42 12 1993-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1985 1985-1989 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1990 Author(s): LIN NIAN, YU ZU-RONG <br/><p>We present a new approach which is completely based on the permutation group theory to solve the eigenvalue problem of the S = 1/2 Heisenberg finite-chain with free-ends boundary. All of the eigenvalues and the corresponding eigenstates are obtained. The properties of the ground state and the low-lying excited states of the antiferromagnetic chain are examined.</p> <br/>Acta Physica Sinica. 1993 42(12): 1990-1997. Published 1993-06-05 Author(s): LIN NIAN, YU ZU-RONG <br/><p>We present a new approach which is completely based on the permutation group theory to solve the eigenvalue problem of the S = 1/2 Heisenberg finite-chain with free-ends boundary. All of the eigenvalues and the corresponding eigenstates are obtained. The properties of the ground state and the low-lying excited states of the antiferromagnetic chain are examined.</p> <br/>Acta Physica Sinica. 1993 42(12): 1990-1997. Published 1993-06-05 A NEW METHOD TO SOLVE THE S = l/2 HEISENBERG SPIN CHAIN LIN NIAN, YU ZU-RONG 1993-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(12): 1990-1997. article doi:10.7498/aps.42.1990 10.7498/aps.42.1990 Acta Physica Sinica 42 12 1993-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1990 1990-1997 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1998 Author(s): SHEN BAO-GEN, KONG LIN-SHU, CAO LEI, GONG HUA-YANG, WANG FANG-WEI, ZHAN WEN-SHAN, GUO HUI-QUN, ZHAO JIAN-GAO <br/><p>Formation,structure and magnetic properties of Ho2Fe17Cx compounds prepared by melt-spinning were studied. These carbides are found to be stable at high temperature. Their crystal structure changes from the hexagonal Th2Zn17-type to rhombohedral Th2Zn17-type,as x increases. Saturation magnetization of Ho2Fe17Cx compounds at 1. 5 and 300K were measured, and no dependence of Fe magnetic moment on carbon concentration was found. The introduction of carbon atoms results in the expansion of unit cell volumes and the rising of Curie temperature. According to the molecular field model,we suggest that the rising of Curie temperature with x is mainly due to the enhancement of Fe-Fe exchange interactions by introduction of interstitial carbon atoms.</p> <br/>Acta Physica Sinica. 1993 42(12): 1998-2004. Published 1993-06-05 Author(s): SHEN BAO-GEN, KONG LIN-SHU, CAO LEI, GONG HUA-YANG, WANG FANG-WEI, ZHAN WEN-SHAN, GUO HUI-QUN, ZHAO JIAN-GAO <br/><p>Formation,structure and magnetic properties of Ho2Fe17Cx compounds prepared by melt-spinning were studied. These carbides are found to be stable at high temperature. Their crystal structure changes from the hexagonal Th2Zn17-type to rhombohedral Th2Zn17-type,as x increases. Saturation magnetization of Ho2Fe17Cx compounds at 1. 5 and 300K were measured, and no dependence of Fe magnetic moment on carbon concentration was found. The introduction of carbon atoms results in the expansion of unit cell volumes and the rising of Curie temperature. According to the molecular field model,we suggest that the rising of Curie temperature with x is mainly due to the enhancement of Fe-Fe exchange interactions by introduction of interstitial carbon atoms.</p> <br/>Acta Physica Sinica. 1993 42(12): 1998-2004. Published 1993-06-05 STRUCTURE AND MAGNETIC PROPERTIES OF Ho2Fe17Cx SHEN BAO-GEN, KONG LIN-SHU, CAO LEI, GONG HUA-YANG, WANG FANG-WEI, ZHAN WEN-SHAN, GUO HUI-QUN, ZHAO JIAN-GAO 1993-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(12): 1998-2004. article doi:10.7498/aps.42.1998 10.7498/aps.42.1998 Acta Physica Sinica 42 12 1993-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.42.1998 1998-2004 //www.getgobooth.com/en/article/doi/10.7498/aps.42.2005 Author(s): WANG QI, BAO JIA-SHAN, CAI YING-SHI, A. D. BOARDMAN <br/><p>The dynamic nonlinear magnetization of different order induced by microwaves in a ferromagnetic material is derived by using perturbation theory. The characteristics of the nonlinear magnetostatic surface wave with wavevector k, making an arbitrary angle to the bias magnetic field, is analysed rigorously. We conclude that the envelope magnetostatic surface solitons in ferromagnetic films can not be generated in all possible direction of propagation.</p> <br/>Acta Physica Sinica. 1993 42(12): 2005-2013. Published 1993-06-05 Author(s): WANG QI, BAO JIA-SHAN, CAI YING-SHI, A. D. BOARDMAN <br/><p>The dynamic nonlinear magnetization of different order induced by microwaves in a ferromagnetic material is derived by using perturbation theory. The characteristics of the nonlinear magnetostatic surface wave with wavevector k, making an arbitrary angle to the bias magnetic field, is analysed rigorously. We conclude that the envelope magnetostatic surface solitons in ferromagnetic films can not be generated in all possible direction of propagation.</p> <br/>Acta Physica Sinica. 1993 42(12): 2005-2013. Published 1993-06-05 CHARACTERISTICS OF NONLINEAR MAGNETOSTATIC SURFACE WAVES WANG QI, BAO JIA-SHAN, CAI YING-SHI, A. D. BOARDMAN 1993-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(12): 2005-2013. article doi:10.7498/aps.42.2005 10.7498/aps.42.2005 Acta Physica Sinica 42 12 1993-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.42.2005 2005-2013 //www.getgobooth.com/en/article/doi/10.7498/aps.42.2014 Author(s): MENG JIN-FANG, ZOU GUANG-TIAN, CUI QI-LIANG, LI XI, TANG JIAN-XIN, ZHAO MU-YU <br/><p>The Raman spectra of Pb1-xBaxTiO3(x=0,0. 2,0. 3) have been measured. Experimental results show that there is an obvious effect of small size of crystal in the system.</p> <br/>Acta Physica Sinica. 1993 42(12): 2014-2018. Published 1993-06-05 Author(s): MENG JIN-FANG, ZOU GUANG-TIAN, CUI QI-LIANG, LI XI, TANG JIAN-XIN, ZHAO MU-YU <br/><p>The Raman spectra of Pb1-xBaxTiO3(x=0,0. 2,0. 3) have been measured. Experimental results show that there is an obvious effect of small size of crystal in the system.</p> <br/>Acta Physica Sinica. 1993 42(12): 2014-2018. Published 1993-06-05 A STUDY OF RAMAN SPECTRA AND SOFT MODE BEHAVIOR IN NANOCRYSTALLINE MATERIALS Pb1-xBaxTiO3 MENG JIN-FANG, ZOU GUANG-TIAN, CUI QI-LIANG, LI XI, TANG JIAN-XIN, ZHAO MU-YU 1993-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(12): 2014-2018. article doi:10.7498/aps.42.2014 10.7498/aps.42.2014 Acta Physica Sinica 42 12 1993-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.42.2014 2014-2018 //www.getgobooth.com/en/article/doi/10.7498/aps.42.2019 Author(s): XIE JIAN-PING, CHEN FENG-HUA, REN BAO-RUI, MING HAI, NIU YA-PING, LI CHUAN-QI, S. OZON <br/><p>In Fraunhofer diffraction of a slit, the slit widths obtained with the fringes produced by polarized light whose vibration is parallel or perpendicular to the slit edge are different. The experimental results about this polarization effect are firstly given. The physical reason of the effect is analysed with boundary diffraction wave. Good coincidence between theory and experiment is achieved.</p> <br/>Acta Physica Sinica. 1993 42(12): 2019-2023. Published 1993-06-05 Author(s): XIE JIAN-PING, CHEN FENG-HUA, REN BAO-RUI, MING HAI, NIU YA-PING, LI CHUAN-QI, S. OZON <br/><p>In Fraunhofer diffraction of a slit, the slit widths obtained with the fringes produced by polarized light whose vibration is parallel or perpendicular to the slit edge are different. The experimental results about this polarization effect are firstly given. The physical reason of the effect is analysed with boundary diffraction wave. Good coincidence between theory and experiment is achieved.</p> <br/>Acta Physica Sinica. 1993 42(12): 2019-2023. Published 1993-06-05 EFFECT OF LIGHT POLARIZATION IN SLIT DIFFRACTION XIE JIAN-PING, CHEN FENG-HUA, REN BAO-RUI, MING HAI, NIU YA-PING, LI CHUAN-QI, S. OZON 1993-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(12): 2019-2023. article doi:10.7498/aps.42.2019 10.7498/aps.42.2019 Acta Physica Sinica 42 12 1993-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.42.2019 2019-2023 //www.getgobooth.com/en/article/doi/10.7498/aps.42.2024 Author(s): DU ZHI-QIANG, ZHANG XUN-SHENG <br/><p>The chemisorption of CH3NO2 on Cu(111) surface has been studied by the semiempirical quantum mechanical method (CNDO/2) of cluster models. The results indicate that the bridge site of Cu(111) is preferable for CH3NO2 adsorption, the orientation of CH3NO2 adsorption is that -NO2 points downward to the Cu surface, and the angle between the plane ONO and Cu-Cu bond is 60o. The orientation of adsorption and the density of states calculated by CNDO/2 calculation are in agreement with the experimental results. The analyses of atomic orbital percentages show that CH3NO2 adsorption is the result of interaction of 2p atomic orbitals of 0 for CH3NO2 with 3d atomic orbitals of Cu.</p> <br/>Acta Physica Sinica. 1993 42(12): 2024-2031. Published 1993-06-05 Author(s): DU ZHI-QIANG, ZHANG XUN-SHENG <br/><p>The chemisorption of CH3NO2 on Cu(111) surface has been studied by the semiempirical quantum mechanical method (CNDO/2) of cluster models. The results indicate that the bridge site of Cu(111) is preferable for CH3NO2 adsorption, the orientation of CH3NO2 adsorption is that -NO2 points downward to the Cu surface, and the angle between the plane ONO and Cu-Cu bond is 60o. The orientation of adsorption and the density of states calculated by CNDO/2 calculation are in agreement with the experimental results. The analyses of atomic orbital percentages show that CH3NO2 adsorption is the result of interaction of 2p atomic orbitals of 0 for CH3NO2 with 3d atomic orbitals of Cu.</p> <br/>Acta Physica Sinica. 1993 42(12): 2024-2031. Published 1993-06-05 A STUDY OF THE CHEMISORPTION OF CH3NO2 ON Cu(lll) SURFACE DU ZHI-QIANG, ZHANG XUN-SHENG 1993-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(12): 2024-2031. article doi:10.7498/aps.42.2024 10.7498/aps.42.2024 Acta Physica Sinica 42 12 1993-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.42.2024 2024-2031 //www.getgobooth.com/en/article/doi/10.7498/aps.42.2032 Author(s): XU JIAN-MEI, LIU LIAO <br/><p>In this paper, we find out that there is the wormhole solution in the vicinity of vacuum of the Higgs field in induced gravity theory even in the absence of other matter fields.</p> <br/>Acta Physica Sinica. 1993 42(12): 2032-2038. Published 1993-06-05 Author(s): XU JIAN-MEI, LIU LIAO <br/><p>In this paper, we find out that there is the wormhole solution in the vicinity of vacuum of the Higgs field in induced gravity theory even in the absence of other matter fields.</p> <br/>Acta Physica Sinica. 1993 42(12): 2032-2038. Published 1993-06-05 WORMHOLE SOLUTION IN THE INDUCED GRAVITY XU JIAN-MEI, LIU LIAO 1993-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(12): 2032-2038. article doi:10.7498/aps.42.2032 10.7498/aps.42.2032 Acta Physica Sinica 42 12 1993-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.42.2032 2032-2038

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