//www.getgobooth.com/ 必威体育下载 daily 15 2024-08-20 10:33:38 apsoffice@iphy.ac.cn apsoffice@iphy.ac.cn 2024-08-20 10:33:38 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.37.881 Author(s): WANG SHUN-JIN <br/><p>The self-consistent mean field in the many-body correlation dynamics is discussed in detail. It is shown that the self-consistent mean field exists in general in many-body correlation dynamics for both stationary and non-stationary cases. The many-body correlations enter the mean field through the two-body correlation c2 and the corresponding collision term I. The role played by I is twofold i.e., dynamical effects and statistical effects on single particle states. The many-body correlations also manifest their effects on the many-body energy and yield an energy expression different from the conventional expression in the HF-Bruc-kner theory.</p> <br/>Acta Physica Sinica. 1988 37(6): 881-891. Published 1988-03-05 Author(s): WANG SHUN-JIN <br/><p>The self-consistent mean field in the many-body correlation dynamics is discussed in detail. It is shown that the self-consistent mean field exists in general in many-body correlation dynamics for both stationary and non-stationary cases. The many-body correlations enter the mean field through the two-body correlation c2 and the corresponding collision term I. The role played by I is twofold i.e., dynamical effects and statistical effects on single particle states. The many-body correlations also manifest their effects on the many-body energy and yield an energy expression different from the conventional expression in the HF-Bruc-kner theory.</p> <br/>Acta Physica Sinica. 1988 37(6): 881-891. Published 1988-03-05 SELF-CONSISTENT MEAN FIELD IN MANY-BODY CORRELATION DYNAMICS WANG SHUN-JIN 1988-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(6): 881-891. article doi:10.7498/aps.37.881 10.7498/aps.37.881 Acta Physica Sinica 37 6 1988-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.881 881-891 //www.getgobooth.com/en/article/doi/10.7498/aps.37.892 Author(s): QU WEI-XING, XU ZHI-ZHAN <br/><p>In this paper, the formulas of quantum differential spectrum of the transition radiation, which are produced when a medium energy relativistic electron passes through a single foil or a stack of foils, are derived on the basis of the macroscopic pola rization theory of me-dium. Using these formulas, we calculate the spectra for a single beryllium foil and a stack of beryllium foils and obtain the results that agree with experiments.</p> <br/>Acta Physica Sinica. 1988 37(6): 892-898. Published 1988-03-05 Author(s): QU WEI-XING, XU ZHI-ZHAN <br/><p>In this paper, the formulas of quantum differential spectrum of the transition radiation, which are produced when a medium energy relativistic electron passes through a single foil or a stack of foils, are derived on the basis of the macroscopic pola rization theory of me-dium. Using these formulas, we calculate the spectra for a single beryllium foil and a stack of beryllium foils and obtain the results that agree with experiments.</p> <br/>Acta Physica Sinica. 1988 37(6): 892-898. Published 1988-03-05 THEORETICAL CALCULATIONS OF THE QUANTUM DIFFERENTIAL SPECTRUM OF TRANSITION RADIATION FROM A STACK OF BERYLLIUM FOILS QU WEI-XING, XU ZHI-ZHAN 1988-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(6): 892-898. article doi:10.7498/aps.37.892 10.7498/aps.37.892 Acta Physica Sinica 37 6 1988-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.892 892-898 //www.getgobooth.com/en/article/doi/10.7498/aps.37.899 Author(s): BAI GUI-RU, LU HONG-JUN, XING XIAO-ZHENG <br/><p>In this paper, formulas of electromagnetic field diffraction on a metal filament are given. We report the experimental and calculated results of diffraction of linear polarized light on a metal slit and its complemencary diffracting screen of filament. The polarization effect in diameter measuremenr of filament by diffraction method is presented quantitatively. Calculated results agree with experimental results.</p> <br/>Acta Physica Sinica. 1988 37(6): 899-905. Published 1988-03-05 Author(s): BAI GUI-RU, LU HONG-JUN, XING XIAO-ZHENG <br/><p>In this paper, formulas of electromagnetic field diffraction on a metal filament are given. We report the experimental and calculated results of diffraction of linear polarized light on a metal slit and its complemencary diffracting screen of filament. The polarization effect in diameter measuremenr of filament by diffraction method is presented quantitatively. Calculated results agree with experimental results.</p> <br/>Acta Physica Sinica. 1988 37(6): 899-905. Published 1988-03-05 POLARIZATION EFFECT OF LIGHT IN DIAMETER MEAS UREMENT BY DIFFRACTION METHOD BAI GUI-RU, LU HONG-JUN, XING XIAO-ZHENG 1988-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(6): 899-905. article doi:10.7498/aps.37.899 10.7498/aps.37.899 Acta Physica Sinica 37 6 1988-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.899 899-905 //www.getgobooth.com/en/article/doi/10.7498/aps.37.906 Author(s): JIA WEI-YI, LU ZHI-DONG, HUANG YI, ZHOU JUN-MING, LI YUNG-KANG, WANG YAN-YUN <br/><p>Photoluminescence technique are used to diagnose the quality of quantum wells. The influences on the fluorescence spectra of quantum wells due to thickness fluctuations of quantum wells, fluctuation of aluminium content, various defects, and unintentional impurities, are discussed. And inversely, the possible reasons causing degradation of quantum wells are deduced from the photoluminescence spectra. To some extent the diagnosis can provide certain basic information for improving the molecular beam epitaxy technology.</p> <br/>Acta Physica Sinica. 1988 37(6): 906-915. Published 1988-03-05 Author(s): JIA WEI-YI, LU ZHI-DONG, HUANG YI, ZHOU JUN-MING, LI YUNG-KANG, WANG YAN-YUN <br/><p>Photoluminescence technique are used to diagnose the quality of quantum wells. The influences on the fluorescence spectra of quantum wells due to thickness fluctuations of quantum wells, fluctuation of aluminium content, various defects, and unintentional impurities, are discussed. And inversely, the possible reasons causing degradation of quantum wells are deduced from the photoluminescence spectra. To some extent the diagnosis can provide certain basic information for improving the molecular beam epitaxy technology.</p> <br/>Acta Physica Sinica. 1988 37(6): 906-915. Published 1988-03-05 PHOTOLUMINESCENCE DIAGNOSIS OF GaAs/GaAlAs MULTIPLE QUANTUM WELLS JIA WEI-YI, LU ZHI-DONG, HUANG YI, ZHOU JUN-MING, LI YUNG-KANG, WANG YAN-YUN 1988-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(6): 906-915. article doi:10.7498/aps.37.906 10.7498/aps.37.906 Acta Physica Sinica 37 6 1988-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.906 906-915 //www.getgobooth.com/en/article/doi/10.7498/aps.37.916 Author(s): WU WEN-HAO, HAN DA-XING <br/><p>A new method of measuring the density of gap states in amorphous semiconductors by employing a two-beam photoconductivity experiment is reported. In the two-beam experiment, an intensive bandgap pump light is used to create non-equilibrium carriers and most of these carriers are trapped in the gap states. Then, at a latter time td after turning off the pump light, these trapped carriers are re-excited by an infrared probe light A photoconductivity overshoot, which depends on the delay time and temperature, is observed in the onset process of IR excited photoconductivity. The results are discussed using the multiple trapping theory. The distribution of the density of gap states is deduced from the experiment.</p> <br/>Acta Physica Sinica. 1988 37(6): 916-923. Published 1988-03-05 Author(s): WU WEN-HAO, HAN DA-XING <br/><p>A new method of measuring the density of gap states in amorphous semiconductors by employing a two-beam photoconductivity experiment is reported. In the two-beam experiment, an intensive bandgap pump light is used to create non-equilibrium carriers and most of these carriers are trapped in the gap states. Then, at a latter time td after turning off the pump light, these trapped carriers are re-excited by an infrared probe light A photoconductivity overshoot, which depends on the delay time and temperature, is observed in the onset process of IR excited photoconductivity. The results are discussed using the multiple trapping theory. The distribution of the density of gap states is deduced from the experiment.</p> <br/>Acta Physica Sinica. 1988 37(6): 916-923. Published 1988-03-05 MEASUREMENT OF THE DENSITY OF GAP STATES IN AMORPHOUS SEMICONDUCTORS BY INFRARED STIMULATED CURRENTS WU WEN-HAO, HAN DA-XING 1988-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(6): 916-923. article doi:10.7498/aps.37.916 10.7498/aps.37.916 Acta Physica Sinica 37 6 1988-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.916 916-923 //www.getgobooth.com/en/article/doi/10.7498/aps.37.924 Author(s): ZHANG XU, ZHOU JING-FU, XUE ZHEN-QUAN, WU QUAN-DE <br/><p>The growth of Ag ultramicro-particles in BaO semiconductor film are investigated bv tran missive electron microscope. The fine growth of Ag ultramicro-particles in BaO film are discovered in the samples after proper heat treatment. We also contrasted the structure difference of single-layer-made and multilayer-made Ag + BaO films. The growth properties of Ag ultramicro-particles in Ag + BaO films with different Ag content are also studied. The Ag ultramicro-particles do not form maze structure in Ag + BaO film with high Ag content, but form isolated Ag particles. There are BaO layer of a few nm thick between every two Ag particles.</p> <br/>Acta Physica Sinica. 1988 37(6): 924-930. Published 1988-03-05 Author(s): ZHANG XU, ZHOU JING-FU, XUE ZHEN-QUAN, WU QUAN-DE <br/><p>The growth of Ag ultramicro-particles in BaO semiconductor film are investigated bv tran missive electron microscope. The fine growth of Ag ultramicro-particles in BaO film are discovered in the samples after proper heat treatment. We also contrasted the structure difference of single-layer-made and multilayer-made Ag + BaO films. The growth properties of Ag ultramicro-particles in Ag + BaO films with different Ag content are also studied. The Ag ultramicro-particles do not form maze structure in Ag + BaO film with high Ag content, but form isolated Ag particles. There are BaO layer of a few nm thick between every two Ag particles.</p> <br/>Acta Physica Sinica. 1988 37(6): 924-930. Published 1988-03-05 GROWTH OF Ag ULTRAMICRO-PARTICLES IN BaO SEMICONDUCTOR FILM ZHANG XU, ZHOU JING-FU, XUE ZHEN-QUAN, WU QUAN-DE 1988-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(6): 924-930. article doi:10.7498/aps.37.924 10.7498/aps.37.924 Acta Physica Sinica 37 6 1988-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.924 924-930 //www.getgobooth.com/en/article/doi/10.7498/aps.37.931 Author(s): SHI HANG, CAI JIAN-HUA <br/><p>We discuss the effect of surface roughness on the surface polariton modes on semi-infinite superlattices. We have derived the Green's function for the Maxwell equations in the case of a semi-infinite superlattice with a smooth surface. The dispersion relations for surface polaritons in the case of a rough surface, are then obtained; The main conclusion is that in this case a new mode, the surface localized TE surface polariton, appears, as can be tested experimentally.</p> <br/>Acta Physica Sinica. 1988 37(6): 931-940. Published 1988-03-05 Author(s): SHI HANG, CAI JIAN-HUA <br/><p>We discuss the effect of surface roughness on the surface polariton modes on semi-infinite superlattices. We have derived the Green's function for the Maxwell equations in the case of a semi-infinite superlattice with a smooth surface. The dispersion relations for surface polaritons in the case of a rough surface, are then obtained; The main conclusion is that in this case a new mode, the surface localized TE surface polariton, appears, as can be tested experimentally.</p> <br/>Acta Physica Sinica. 1988 37(6): 931-940. Published 1988-03-05 EFFECT OF SURFACE ROUGHNESS ON THE SURFACE POLARITON MODES ON SEMI-INFINITE SUPERLATTICES SHI HANG, CAI JIAN-HUA 1988-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(6): 931-940. article doi:10.7498/aps.37.931 10.7498/aps.37.931 Acta Physica Sinica 37 6 1988-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.931 931-940 //www.getgobooth.com/en/article/doi/10.7498/aps.37.941 Author(s): JIANG QI, GONG CHANG-DE <br/><p>In this paper, the crossover effect of the dimensionality in the disordered layer system is studied by using the post-CPA method for the vertex. The effective dimensionality of the system is determined by the interlayer coupling t. It is shown that Anderson transition will occur at the critical value tc. Boltzmann conductivity, the dynamical conductivity corresponding to the maximum crossed diagrams, the d. c. conductivity and the localization length near the critical point are calculated.</p> <br/>Acta Physica Sinica. 1988 37(6): 941-949. Published 1988-03-05 Author(s): JIANG QI, GONG CHANG-DE <br/><p>In this paper, the crossover effect of the dimensionality in the disordered layer system is studied by using the post-CPA method for the vertex. The effective dimensionality of the system is determined by the interlayer coupling t. It is shown that Anderson transition will occur at the critical value tc. Boltzmann conductivity, the dynamical conductivity corresponding to the maximum crossed diagrams, the d. c. conductivity and the localization length near the critical point are calculated.</p> <br/>Acta Physica Sinica. 1988 37(6): 941-949. Published 1988-03-05 CONDUCTIVITY IN THE DISORDERED LAYER SYSTEM JIANG QI, GONG CHANG-DE 1988-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(6): 941-949. article doi:10.7498/aps.37.941 10.7498/aps.37.941 Acta Physica Sinica 37 6 1988-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.941 941-949 //www.getgobooth.com/en/article/doi/10.7498/aps.37.950 Author(s): ZHANG YU-HENG, LIU HONG-BAO <br/><p>In the present work, the behaviors of a-Ge/Ag composite layers are studied. These layers are composed of amorphous Ge film with thickness 2000 ? and Ag film with different thickness. It is found that, when the thickness of Ag film decreases, the electrical resistivity of the composite layer at room temperature becomes more and more smaller than that of Ag mono-layer with the same thickness. The proximity effect at room temperature is shown clearly by experiment. As the samples are annealed, we obtain various R(Ta)-T relations under different annealling temperature Ta and various dependences of R300k on Ta for layers withe different thickness of Ag film. Based on structural analysis by XRD and composition analysis by EMP, and observation with TEM and SEM, the new phenomena are explained.</p> <br/>Acta Physica Sinica. 1988 37(6): 950-958. Published 1988-03-05 Author(s): ZHANG YU-HENG, LIU HONG-BAO <br/><p>In the present work, the behaviors of a-Ge/Ag composite layers are studied. These layers are composed of amorphous Ge film with thickness 2000 ? and Ag film with different thickness. It is found that, when the thickness of Ag film decreases, the electrical resistivity of the composite layer at room temperature becomes more and more smaller than that of Ag mono-layer with the same thickness. The proximity effect at room temperature is shown clearly by experiment. As the samples are annealed, we obtain various R(Ta)-T relations under different annealling temperature Ta and various dependences of R300k on Ta for layers withe different thickness of Ag film. Based on structural analysis by XRD and composition analysis by EMP, and observation with TEM and SEM, the new phenomena are explained.</p> <br/>Acta Physica Sinica. 1988 37(6): 950-958. Published 1988-03-05 THE PROXIMITY EFFECT AND MUTUAL DIFFUSION IN a-Ge/Ag LAYERS ZHANG YU-HENG, LIU HONG-BAO 1988-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(6): 950-958. article doi:10.7498/aps.37.950 10.7498/aps.37.950 Acta Physica Sinica 37 6 1988-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.950 950-958 //www.getgobooth.com/en/article/doi/10.7498/aps.37.959 Author(s): SHEN WEN-DA, ZHU SHI-TONG <br/><p>The maximal and complete analytic extension of a globally regular Schwarzschild black hole is given in the Kruskal coordinate. The junction conditions on null hypersurface are discussed. The asymptotic space-time stuctures of singular and nonsingular Schwarzschild black holes are compared. It is shown that a nonsingular stable black hole can exist.</p> <br/>Acta Physica Sinica. 1988 37(6): 959-966. Published 1988-03-05 Author(s): SHEN WEN-DA, ZHU SHI-TONG <br/><p>The maximal and complete analytic extension of a globally regular Schwarzschild black hole is given in the Kruskal coordinate. The junction conditions on null hypersurface are discussed. The asymptotic space-time stuctures of singular and nonsingular Schwarzschild black holes are compared. It is shown that a nonsingular stable black hole can exist.</p> <br/>Acta Physica Sinica. 1988 37(6): 959-966. Published 1988-03-05 MAXIMAL AND COMPLETE ANALYTIC EXTENSION OF A GLOBALLY REGULAR SCHWARZSCHILD BLACK HOLE SHEN WEN-DA, ZHU SHI-TONG 1988-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(6): 959-966. article doi:10.7498/aps.37.959 10.7498/aps.37.959 Acta Physica Sinica 37 6 1988-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.959 959-966 //www.getgobooth.com/en/article/doi/10.7498/aps.37.967 Author(s): FENG SHI-PING <br/><p>Using the Anderson lattice, the heavy-fermion superconductivity is discussed. In the long wavelength limit of Slave boson field, the mutual interaction between the same type quasipar-ticles is attractive by one-Slave boson exchange and the heavy-fermion superconductivity is induced by the first type quasiparticles-quasi-f electrons only.</p> <br/>Acta Physica Sinica. 1988 37(6): 967-973. Published 1988-03-05 Author(s): FENG SHI-PING <br/><p>Using the Anderson lattice, the heavy-fermion superconductivity is discussed. In the long wavelength limit of Slave boson field, the mutual interaction between the same type quasipar-ticles is attractive by one-Slave boson exchange and the heavy-fermion superconductivity is induced by the first type quasiparticles-quasi-f electrons only.</p> <br/>Acta Physica Sinica. 1988 37(6): 967-973. Published 1988-03-05 A POSSIBLE HEAVY-FERMION MECHANISM OF SUPERCONDUCTIVITY——ELECTRON-SLAVE BOSON SUPERCONDUCTING MECHANISM FENG SHI-PING 1988-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(6): 967-973. article doi:10.7498/aps.37.967 10.7498/aps.37.967 Acta Physica Sinica 37 6 1988-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.967 967-973 //www.getgobooth.com/en/article/doi/10.7498/aps.37.974 Author(s): LIU ZHENG, ZHAN WEN-SHAN, ZHAO JIAN-GAO, SHEN BAO-GEN <br/><p>We reported here the effect of transition metals TM (TM = Nb, V, Cr, Mn, Co, Ni and Cu) on magnetic moment. Curie temperature and crystallization temperature of amorphous Nd15Fe79B6 alloys. The average internal fields for these alloys were obtained by M?ssbauer spectroscopy.</p> <br/>Acta Physica Sinica. 1988 37(6): 974-977. Published 1988-03-05 Author(s): LIU ZHENG, ZHAN WEN-SHAN, ZHAO JIAN-GAO, SHEN BAO-GEN <br/><p>We reported here the effect of transition metals TM (TM = Nb, V, Cr, Mn, Co, Ni and Cu) on magnetic moment. Curie temperature and crystallization temperature of amorphous Nd15Fe79B6 alloys. The average internal fields for these alloys were obtained by M?ssbauer spectroscopy.</p> <br/>Acta Physica Sinica. 1988 37(6): 974-977. Published 1988-03-05 THE EFFECT OF TRANSITION METALS ON THE MAGNETIC PROPERTIES OF AMORPHOUS Nd15Fe79B6 ALLOYS LIU ZHENG, ZHAN WEN-SHAN, ZHAO JIAN-GAO, SHEN BAO-GEN 1988-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(6): 974-977. article doi:10.7498/aps.37.974 10.7498/aps.37.974 Acta Physica Sinica 37 6 1988-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.974 974-977 //www.getgobooth.com/en/article/doi/10.7498/aps.37.978 Author(s): ZHANG KANG-HOU, ZHOU YUE-HUA, ZHAO HUAI-ZHI, CHEN LI-LI <br/><p>The metallic glasses AgxCu50-xZr50 are prepared by an induction furnace followed by melt spinning in vacuum. It is found that amorphous alloys can be obtained in the range xc of the metallic glasses AgxCu50-xZr50 with x = 2, 4, 6 and 10 are obtained. The activation energys En of crystallization are determined by the Kissinger method. It is shown that the bigger is the x in metallic glasses AgxCu50-xZr50, the less stable is the glasses. A comparison of the study on the crystallization of the glasses in argon with that in the air suggests that the second exothermal peaks are oxidation peaks.</p> <br/>Acta Physica Sinica. 1988 37(6): 978-982. Published 1988-03-05 Author(s): ZHANG KANG-HOU, ZHOU YUE-HUA, ZHAO HUAI-ZHI, CHEN LI-LI <br/><p>The metallic glasses AgxCu50-xZr50 are prepared by an induction furnace followed by melt spinning in vacuum. It is found that amorphous alloys can be obtained in the range xc of the metallic glasses AgxCu50-xZr50 with x = 2, 4, 6 and 10 are obtained. The activation energys En of crystallization are determined by the Kissinger method. It is shown that the bigger is the x in metallic glasses AgxCu50-xZr50, the less stable is the glasses. A comparison of the study on the crystallization of the glasses in argon with that in the air suggests that the second exothermal peaks are oxidation peaks.</p> <br/>Acta Physica Sinica. 1988 37(6): 978-982. Published 1988-03-05 THE AMORPHOUS AgxCu50-xZr50 ALLOYS AND THEIR CRYSTALLIZATION ZHANG KANG-HOU, ZHOU YUE-HUA, ZHAO HUAI-ZHI, CHEN LI-LI 1988-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(6): 978-982. article doi:10.7498/aps.37.978 10.7498/aps.37.978 Acta Physica Sinica 37 6 1988-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.978 978-982 //www.getgobooth.com/en/article/doi/10.7498/aps.37.983 Author(s): ZHANG SEN, QIU JI-ZHEN, HU SU-FEN, LU JIE, ZHONG JIAN-WEI, LIANG YI, SUN JIA-ZHEN <br/><p>Stark structure of Sr atom Rydberg states in the vicinity of n = 12 and n = 13 were me-asured by multistep excitation method with ππ polarized lasers. The Stark map exhibited the linear behaviour of Stark manifold of Sr atom in low electric field. The crossing and antic-rossing structure of levels, which depends on the quantum effects, were discussed.</p> <br/>Acta Physica Sinica. 1988 37(6): 983-988. Published 1988-03-05 Author(s): ZHANG SEN, QIU JI-ZHEN, HU SU-FEN, LU JIE, ZHONG JIAN-WEI, LIANG YI, SUN JIA-ZHEN <br/><p>Stark structure of Sr atom Rydberg states in the vicinity of n = 12 and n = 13 were me-asured by multistep excitation method with ππ polarized lasers. The Stark map exhibited the linear behaviour of Stark manifold of Sr atom in low electric field. The crossing and antic-rossing structure of levels, which depends on the quantum effects, were discussed.</p> <br/>Acta Physica Sinica. 1988 37(6): 983-988. Published 1988-03-05 ELECTRIC FIELD EFFECTS ON Sr ATOM RYDBERG STATES ZHANG SEN, QIU JI-ZHEN, HU SU-FEN, LU JIE, ZHONG JIAN-WEI, LIANG YI, SUN JIA-ZHEN 1988-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(6): 983-988. article doi:10.7498/aps.37.983 10.7498/aps.37.983 Acta Physica Sinica 37 6 1988-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.983 983-988 //www.getgobooth.com/en/article/doi/10.7498/aps.37.989 Author(s): TAN WEI-HAN, LIN ZUN-QI, YU WEN-YAN, GU MIN, CHEN WEN-HUA, ZHENG YU-XIA, WANG GUAN-ZHI, CUI JI-XIU, CHENG RUI-HUA, DENG XI-MING <br/><p>After analyzing different experiments of population inversion in the X-ray region, we proposed a new method of a micro-tube heated by a laser beam, and observed the high population inversion between ls3p and 1s4p levels and ls3p and ls5p levels. The physical mechanism was discussed in some detail.</p> <br/>Acta Physica Sinica. 1988 37(6): 989-995. Published 1988-03-05 Author(s): TAN WEI-HAN, LIN ZUN-QI, YU WEN-YAN, GU MIN, CHEN WEN-HUA, ZHENG YU-XIA, WANG GUAN-ZHI, CUI JI-XIU, CHENG RUI-HUA, DENG XI-MING <br/><p>After analyzing different experiments of population inversion in the X-ray region, we proposed a new method of a micro-tube heated by a laser beam, and observed the high population inversion between ls3p and 1s4p levels and ls3p and ls5p levels. The physical mechanism was discussed in some detail.</p> <br/>Acta Physica Sinica. 1988 37(6): 989-995. Published 1988-03-05 HIGH SOFT X-RAY POPULATION INVERSION OBSERVED IN A LASER-IRRADIATED MICRO-TUBE TAN WEI-HAN, LIN ZUN-QI, YU WEN-YAN, GU MIN, CHEN WEN-HUA, ZHENG YU-XIA, WANG GUAN-ZHI, CUI JI-XIU, CHENG RUI-HUA, DENG XI-MING 1988-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(6): 989-995. article doi:10.7498/aps.37.989 10.7498/aps.37.989 Acta Physica Sinica 37 6 1988-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.989 989-995 //www.getgobooth.com/en/article/doi/10.7498/aps.37.996 Author(s): WANG YU-MIN, A. ERNEST <br/><p>Some modifications are made on the Molnar theory. And the analytical method for finding the transient wave-form in Townsend discharge with various kinds of metastables is given.</p> <br/>Acta Physica Sinica. 1988 37(6): 996-1002. Published 1988-03-05 Author(s): WANG YU-MIN, A. ERNEST <br/><p>Some modifications are made on the Molnar theory. And the analytical method for finding the transient wave-form in Townsend discharge with various kinds of metastables is given.</p> <br/>Acta Physica Sinica. 1988 37(6): 996-1002. Published 1988-03-05 TRANSIENT CURRENT ANALYSIS IN TOWNSEND DISCHARGE WITH VARIOUS KINDS OF METASTABLES WANG YU-MIN, A. ERNEST 1988-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(6): 996-1002. article doi:10.7498/aps.37.996 10.7498/aps.37.996 Acta Physica Sinica 37 6 1988-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.996 996-1002 //www.getgobooth.com/en/article/doi/10.7498/aps.37.1003 Author(s): ZHOU QING <br/><p>The crystal theory is formulated for treating the vibrational Green's functions of alloys. The configurations of the alloy could be symmetrized in virtue of the theory of permutation groups. The Hamiltonian of the alloy could be block diagonalized using the franslation group of the lattice, and completely diagonalized by applying Wilson's GF matrix method. So the inverse matrix of Green's functions is solved. Phonon's Hamiltonian and Green's func-tions are also mentioned.</p> <br/>Acta Physica Sinica. 1988 37(6): 1003-1009. Published 1988-03-05 Author(s): ZHOU QING <br/><p>The crystal theory is formulated for treating the vibrational Green's functions of alloys. The configurations of the alloy could be symmetrized in virtue of the theory of permutation groups. The Hamiltonian of the alloy could be block diagonalized using the franslation group of the lattice, and completely diagonalized by applying Wilson's GF matrix method. So the inverse matrix of Green's functions is solved. Phonon's Hamiltonian and Green's func-tions are also mentioned.</p> <br/>Acta Physica Sinica. 1988 37(6): 1003-1009. Published 1988-03-05 DIAGONALIZATION OF HAMILTONIAN FOR VIBRATION OF AB ALLOYS ZHOU QING 1988-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(6): 1003-1009. article doi:10.7498/aps.37.1003 10.7498/aps.37.1003 Acta Physica Sinica 37 6 1988-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.1003 1003-1009 //www.getgobooth.com/en/article/doi/10.7498/aps.37.1010 Author(s): XIONG XIAO-MING, ZHOU SHI-XUN <br/><p>The fractional quantum Hall effect system is analysed in the mass centre coordinate. An equation which restricts the combination of the single electron angular momentum is obtained. By using this restrictive relation, the dimension of the Hamiltonian eigenequations could be reduced. We also calculated the eigenenergies in the mass centre coordinate with the effect of the neutralizing background charges included.</p> <br/>Acta Physica Sinica. 1988 37(6): 1010-1013. Published 1988-03-05 Author(s): XIONG XIAO-MING, ZHOU SHI-XUN <br/><p>The fractional quantum Hall effect system is analysed in the mass centre coordinate. An equation which restricts the combination of the single electron angular momentum is obtained. By using this restrictive relation, the dimension of the Hamiltonian eigenequations could be reduced. We also calculated the eigenenergies in the mass centre coordinate with the effect of the neutralizing background charges included.</p> <br/>Acta Physica Sinica. 1988 37(6): 1010-1013. Published 1988-03-05 EIGENENERGIES OF THE FRACTIONAL QUANTUM HALL EFFECT SYSTEM IN THE MASS CENTRE COORDINATE XIONG XIAO-MING, ZHOU SHI-XUN 1988-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(6): 1010-1013. article doi:10.7498/aps.37.1010 10.7498/aps.37.1010 Acta Physica Sinica 37 6 1988-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.1010 1010-1013 //www.getgobooth.com/en/article/doi/10.7498/aps.37.1014 Author(s): TANG KUN-FA, HU JIA-ZHEN <br/><p>An exact real space renormalisation group is applied to study the adsorption of a single self-avoiding walk on fractal spaces. Exact results of critical exponent ν and crossover exponent φ show that de Gennes' conjecture φ =1-ν is invalid. The phase diagram has qualitatively the same shape as it has on Euclidean space, except for a unique and important difference that the adsorption transition would take place for a single polymer chain at a hard wail exerting a infinitesimal short-range attractive force on the fractal space instead of a finite one as on Euclidean space.</p> <br/>Acta Physica Sinica. 1988 37(6): 1014-1017. Published 1988-03-05 Author(s): TANG KUN-FA, HU JIA-ZHEN <br/><p>An exact real space renormalisation group is applied to study the adsorption of a single self-avoiding walk on fractal spaces. Exact results of critical exponent ν and crossover exponent φ show that de Gennes' conjecture φ =1-ν is invalid. The phase diagram has qualitatively the same shape as it has on Euclidean space, except for a unique and important difference that the adsorption transition would take place for a single polymer chain at a hard wail exerting a infinitesimal short-range attractive force on the fractal space instead of a finite one as on Euclidean space.</p> <br/>Acta Physica Sinica. 1988 37(6): 1014-1017. Published 1988-03-05 ADSORPTION OF A SELF-AVOIDING WALK ON FRACTAL SPACES TANG KUN-FA, HU JIA-ZHEN 1988-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(6): 1014-1017. article doi:10.7498/aps.37.1014 10.7498/aps.37.1014 Acta Physica Sinica 37 6 1988-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.1014 1014-1017 //www.getgobooth.com/en/article/doi/10.7498/aps.37.1018 Author(s): LI GENG-YING, WANG DONG-SHENG, WU XUE-WEN <br/><p>The comb-pulse response of a system of half-integer quadruplar nuclei depends on the quadrupolar coupling constant ωq. When the average rf field strength ωe (in rad. s-1) satisfies the condition ωq/ωee/(2π); and when ωq/ωe &lt; 2.0, the resul tant line appears at 2ωe/(2π). Theoretical calculations are in agreement with experiments.These consequences indicate that the comb-pulse sequence will probably become a powerful technique for investigating phase transitions and dynamic processes in these systems.</p> <br/>Acta Physica Sinica. 1988 37(6): 1018-1024. Published 1988-03-05 Author(s): LI GENG-YING, WANG DONG-SHENG, WU XUE-WEN <br/><p>The comb-pulse response of a system of half-integer quadruplar nuclei depends on the quadrupolar coupling constant ωq. When the average rf field strength ωe (in rad. s-1) satisfies the condition ωq/ωee/(2π); and when ωq/ωe &lt; 2.0, the resul tant line appears at 2ωe/(2π). Theoretical calculations are in agreement with experiments.These consequences indicate that the comb-pulse sequence will probably become a powerful technique for investigating phase transitions and dynamic processes in these systems.</p> <br/>Acta Physica Sinica. 1988 37(6): 1018-1024. Published 1988-03-05 RESPONSE OF HALF-INTEGER QUADRUPOLAR NUCLEAR TO COMB-PULSE IN SOLID STATE NMR LI GENG-YING, WANG DONG-SHENG, WU XUE-WEN 1988-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(6): 1018-1024. article doi:10.7498/aps.37.1018 10.7498/aps.37.1018 Acta Physica Sinica 37 6 1988-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.1018 1018-1024 //www.getgobooth.com/en/article/doi/10.7498/aps.37.1025 Author(s): PENG CHENG, SHENG CHI, SUN HENG-HUI <br/><p>The C-V characteristic of a silicon p-n diode grown by molecular beam epitaxy (MBE) technique was carefully studied in the case that the space charge region reached the edge of MBE layer. Based on the theoretical analysis and experimental measurement, the impurity concentration in unintentionally doped n-type MBE layer was determined to be 8.0×1014cm-3. This method is shown to be a new way to find out impurity concentrations in supper-thin semiconductor layers.</p> <br/>Acta Physica Sinica. 1988 37(6): 1025-1029. Published 1988-03-05 Author(s): PENG CHENG, SHENG CHI, SUN HENG-HUI <br/><p>The C-V characteristic of a silicon p-n diode grown by molecular beam epitaxy (MBE) technique was carefully studied in the case that the space charge region reached the edge of MBE layer. Based on the theoretical analysis and experimental measurement, the impurity concentration in unintentionally doped n-type MBE layer was determined to be 8.0×1014cm-3. This method is shown to be a new way to find out impurity concentrations in supper-thin semiconductor layers.</p> <br/>Acta Physica Sinica. 1988 37(6): 1025-1029. Published 1988-03-05 NEW C-V CHARACTERISTIC OF Si pn DIODES PREPARED BY MOLECULAR BEAM EPITAXY PENG CHENG, SHENG CHI, SUN HENG-HUI 1988-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(6): 1025-1029. article doi:10.7498/aps.37.1025 10.7498/aps.37.1025 Acta Physica Sinica 37 6 1988-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.1025 1025-1029 //www.getgobooth.com/en/article/doi/10.7498/aps.37.1030 Author(s): LI YAN-MIN, ZHANG LI-YUAN <br/><p>The effect of diagonal disorder on the upper critical field of the local electron pair system is studied in the framework of the mean field approximation. It is obtained that this kind of disorder greatly changes the temperature behavior of H(c2). Comparing che upper critical field of this system with those of heavy fermion superconductors CeCu2Si2 and UPt3, we find that it could have the similar unusual temperature dependence.</p> <br/>Acta Physica Sinica. 1988 37(6): 1030-1035. Published 1988-03-05 Author(s): LI YAN-MIN, ZHANG LI-YUAN <br/><p>The effect of diagonal disorder on the upper critical field of the local electron pair system is studied in the framework of the mean field approximation. It is obtained that this kind of disorder greatly changes the temperature behavior of H(c2). Comparing che upper critical field of this system with those of heavy fermion superconductors CeCu2Si2 and UPt3, we find that it could have the similar unusual temperature dependence.</p> <br/>Acta Physica Sinica. 1988 37(6): 1030-1035. Published 1988-03-05 EFFECT OF DIAGONAL DISORDER ON THE UPPER CRITICAL FIELD OF THE LOCAL ELECTRON PAIR SYSTEM LI YAN-MIN, ZHANG LI-YUAN 1988-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(6): 1030-1035. article doi:10.7498/aps.37.1030 10.7498/aps.37.1030 Acta Physica Sinica 37 6 1988-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.1030 1030-1035 //www.getgobooth.com/en/article/doi/10.7498/aps.37.1036 Author(s): ZHANG QI-RUI, ZHOU XIAN-YI, WANG JIN-SONG, GUAN WEI-YAN <br/><p>When the temperature is far below Tc, a set of electric voltage steps appear on the H-V or I-V curves of the metallic glass Zn78Co22 under longitudinal magnetic fields. The oc-curing conditions and the structural characteristic of steps have been compared systematically with the steps existing in homogeneous superconductors of quasi-one or quasi-two dimension systems. A model of superconducting phase separation and the idea of phase slip centers have been used to explain the observed phenomena.</p> <br/>Acta Physica Sinica. 1988 37(6): 1036-1041. Published 1988-03-05 Author(s): ZHANG QI-RUI, ZHOU XIAN-YI, WANG JIN-SONG, GUAN WEI-YAN <br/><p>When the temperature is far below Tc, a set of electric voltage steps appear on the H-V or I-V curves of the metallic glass Zn78Co22 under longitudinal magnetic fields. The oc-curing conditions and the structural characteristic of steps have been compared systematically with the steps existing in homogeneous superconductors of quasi-one or quasi-two dimension systems. A model of superconducting phase separation and the idea of phase slip centers have been used to explain the observed phenomena.</p> <br/>Acta Physica Sinica. 1988 37(6): 1036-1041. Published 1988-03-05 RESISTIVE STATE OF THE SUPERCONDUCTING GLASS Zr78Co22 IN LONGITUDINAL MAGNETIC FIELDS ZHANG QI-RUI, ZHOU XIAN-YI, WANG JIN-SONG, GUAN WEI-YAN 1988-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(6): 1036-1041. article doi:10.7498/aps.37.1036 10.7498/aps.37.1036 Acta Physica Sinica 37 6 1988-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.1036 1036-1041 //www.getgobooth.com/en/article/doi/10.7498/aps.37.1042 Author(s): ZHAO YONG, ZHANG HAN, SUN SHI-FANG, SUN DUN-MING, YU DAO-QI, YU WEI-CHAO, CHEN ZU-YAO, ZHANG QI-RUI <br/><p>The relation between superconductivity and phase structure of YBa2-xSrxCu3O7-δ system has been studied systematically. It is found that when 0c increases monotonously. The mechanism of the effect of Sr atom on Tc and superconductivity have also been discussed.</p> <br/>Acta Physica Sinica. 1988 37(6): 1042-1047. Published 1988-03-05 Author(s): ZHAO YONG, ZHANG HAN, SUN SHI-FANG, SUN DUN-MING, YU DAO-QI, YU WEI-CHAO, CHEN ZU-YAO, ZHANG QI-RUI <br/><p>The relation between superconductivity and phase structure of YBa2-xSrxCu3O7-δ system has been studied systematically. It is found that when 0c increases monotonously. The mechanism of the effect of Sr atom on Tc and superconductivity have also been discussed.</p> <br/>Acta Physica Sinica. 1988 37(6): 1042-1047. Published 1988-03-05 THE RELATION OF SUPERCONDUCTIVITY AND STRUCTURE IN YBa2-xSrxCu3O7-δ ZHAO YONG, ZHANG HAN, SUN SHI-FANG, SUN DUN-MING, YU DAO-QI, YU WEI-CHAO, CHEN ZU-YAO, ZHANG QI-RUI 1988-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(6): 1042-1047. article doi:10.7498/aps.37.1042 10.7498/aps.37.1042 Acta Physica Sinica 37 6 1988-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.1042 1042-1047 //www.getgobooth.com/en/article/doi/10.7498/aps.37.1048 Author(s): YU DAO-QI, PAN GUO-QIANG, ZHAO YONG, SUN SHI-FANG, CHEN ZU-YAO, ZHANG QI-RUI <br/><p>We have studied the relation between the low-temperature resistance of single phase Ba2YCu3O7-δ and magnetic field, temperature and measuring current. The results show that the resistance behavior varies obviously with the strength and direction of the field as well as the measuring current. We suggest that all the results are associated with the granular structure of the sample.</p> <br/>Acta Physica Sinica. 1988 37(6): 1048-1052. Published 1988-03-05 Author(s): YU DAO-QI, PAN GUO-QIANG, ZHAO YONG, SUN SHI-FANG, CHEN ZU-YAO, ZHANG QI-RUI <br/><p>We have studied the relation between the low-temperature resistance of single phase Ba2YCu3O7-δ and magnetic field, temperature and measuring current. The results show that the resistance behavior varies obviously with the strength and direction of the field as well as the measuring current. We suggest that all the results are associated with the granular structure of the sample.</p> <br/>Acta Physica Sinica. 1988 37(6): 1048-1052. Published 1988-03-05 CHARACTERISTICS OF THE LOW-TEMPERATURE RESISTIVITY OF GRANULAR SUPERCONDUCTOR Ba2YCu3O7-δ YU DAO-QI, PAN GUO-QIANG, ZHAO YONG, SUN SHI-FANG, CHEN ZU-YAO, ZHANG QI-RUI 1988-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(6): 1048-1052. article doi:10.7498/aps.37.1048 10.7498/aps.37.1048 Acta Physica Sinica 37 6 1988-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.1048 1048-1052

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