//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.37.529 Author(s): SU FANG <br/><p>To avoid absorbing moisture from the air, we have sealed all samples in high vacuum, and performed 7Li NMR investigations during pre-crystallization process of amorphous ionic conductor B2O3-0.7Li2O-0.7LiCl-xAl2O3(x = 0.15, 0.10 and 0.05) at 293 K and 77 K. We find that there is only spin-spin relaxation time of lithium ions in solid phase, T2= 87μs, which obeys Gaussian decay law at 77 K. At. room temperature all lithium ions devide into two phases. T2s of lithium ions in solid phase still obeys Gaussian law of decay, T2s =127 μs, but T2l of lithium ions in liquid phase obeys Lorentzian law. For three amorphous lithium-ionic conductor B2O3-0.7Li2O-0.7LiCl-xAl2O3 (x = 0.15, 0.10 and 0.05), T2l of lithium ions in liquid phase increases rapidly, i.e. their width of 7Li NMR absorption line becomes much narrower at about 401°,388°and 381℃ respectively. Hence the physical picture of interfacial effect between amorphous matrix and the crystallites is again confirmed.</p> <br/>Acta Physica Sinica. 1988 37(4): 529-537. Published 1988-02-05 Author(s): SU FANG <br/><p>To avoid absorbing moisture from the air, we have sealed all samples in high vacuum, and performed 7Li NMR investigations during pre-crystallization process of amorphous ionic conductor B2O3-0.7Li2O-0.7LiCl-xAl2O3(x = 0.15, 0.10 and 0.05) at 293 K and 77 K. We find that there is only spin-spin relaxation time of lithium ions in solid phase, T2= 87μs, which obeys Gaussian decay law at 77 K. At. room temperature all lithium ions devide into two phases. T2s of lithium ions in solid phase still obeys Gaussian law of decay, T2s =127 μs, but T2l of lithium ions in liquid phase obeys Lorentzian law. For three amorphous lithium-ionic conductor B2O3-0.7Li2O-0.7LiCl-xAl2O3 (x = 0.15, 0.10 and 0.05), T2l of lithium ions in liquid phase increases rapidly, i.e. their width of 7Li NMR absorption line becomes much narrower at about 401°,388°and 381℃ respectively. Hence the physical picture of interfacial effect between amorphous matrix and the crystallites is again confirmed.</p> <br/>Acta Physica Sinica. 1988 37(4): 529-537. Published 1988-02-05 7Li NMR INVESTIGATIONS DURING PER-CRYSTALLIZATION PROCESS IN AMORPHOUS IONIC CONDUCTOR B2O3- 0.7Li2O-0.7LiCl-xAl2O3 SU FANG 1988-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(4): 529-537. article doi:10.7498/aps.37.529 10.7498/aps.37.529 Acta Physica Sinica 37 4 1988-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.529 529-537 //www.getgobooth.com/en/article/doi/10.7498/aps.37.538 Author(s): CUI WAN-QIU, YIN JIAN, ZHOU JING, HE ZOU-RAN <br/><p>The impedance spectroscopy of non-crystalline ionic Conductors in systems of P2O5-Li2O-LiCl-Al2O3, P2O5-Cul-CuCl, GeO2-Ta2O5-Li2O are studied. The models of equivalent circuit for impedance spectroscopy measurement box of non-crystalline specimen is presented, and the dispersion relations for boundery impedance are obtained under certain conditions, the boundary impedance presented here will transit to the constant phase angle impedance.</p> <br/>Acta Physica Sinica. 1988 37(4): 538-545. Published 1988-02-05 Author(s): CUI WAN-QIU, YIN JIAN, ZHOU JING, HE ZOU-RAN <br/><p>The impedance spectroscopy of non-crystalline ionic Conductors in systems of P2O5-Li2O-LiCl-Al2O3, P2O5-Cul-CuCl, GeO2-Ta2O5-Li2O are studied. The models of equivalent circuit for impedance spectroscopy measurement box of non-crystalline specimen is presented, and the dispersion relations for boundery impedance are obtained under certain conditions, the boundary impedance presented here will transit to the constant phase angle impedance.</p> <br/>Acta Physica Sinica. 1988 37(4): 538-545. Published 1988-02-05 A STUDY ON IMPEDANCE SPECTROSCOPY OF NON-CRYSTALLINE IONIC CONDUCTORS CUI WAN-QIU, YIN JIAN, ZHOU JING, HE ZOU-RAN 1988-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(4): 538-545. article doi:10.7498/aps.37.538 10.7498/aps.37.538 Acta Physica Sinica 37 4 1988-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.538 538-545 //www.getgobooth.com/en/article/doi/10.7498/aps.37.546 Author(s): CHEN YAN-PING, R. J. HASTIE, KE FU-JIU, CAI SHI-DONG, L. CHEN <br/><p>The Grad-Shafranov equilibrium equation for an anisotropic Tokamak plasma is rederived using the method of Greene, Johnson and Weimer. The stabilizing effect of the anisotropic energetic particle component on the internal kink mode in the Tokamak plasma has been analyzed with the generalized energy principle. Detailed calculation on this effect is performed for two kinds of energetic particle distribution function of slowing down in energy and square top poloidal pressure profile. The stability window of internal kink mode due to the energetic trapped particles with magnetic turning point at high field side is obtained. It's relation with various physical parameters is discussed in some depth.</p> <br/>Acta Physica Sinica. 1988 37(4): 546-556. Published 1988-02-05 Author(s): CHEN YAN-PING, R. J. HASTIE, KE FU-JIU, CAI SHI-DONG, L. CHEN <br/><p>The Grad-Shafranov equilibrium equation for an anisotropic Tokamak plasma is rederived using the method of Greene, Johnson and Weimer. The stabilizing effect of the anisotropic energetic particle component on the internal kink mode in the Tokamak plasma has been analyzed with the generalized energy principle. Detailed calculation on this effect is performed for two kinds of energetic particle distribution function of slowing down in energy and square top poloidal pressure profile. The stability window of internal kink mode due to the energetic trapped particles with magnetic turning point at high field side is obtained. It's relation with various physical parameters is discussed in some depth.</p> <br/>Acta Physica Sinica. 1988 37(4): 546-556. Published 1988-02-05 ENERGETIC TRAPPED PARTICLE STABILIZING EFFECT OF INTERNAL KINK MODE CHEN YAN-PING, R. J. HASTIE, KE FU-JIU, CAI SHI-DONG, L. CHEN 1988-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(4): 546-556. article doi:10.7498/aps.37.546 10.7498/aps.37.546 Acta Physica Sinica 37 4 1988-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.546 546-556 //www.getgobooth.com/en/article/doi/10.7498/aps.37.557 Author(s): XU- ZHI-ZHAN, TANG YONG-HONG, QIAN AI-DI <br/><p>Periodic structure of stimulated Brillouin backscattering spectra have been observed in ex-periments of intense Nd glass laser irradiating planar targets. Analysis and calculation indicate that this period structure results from the interaction between the ion-acoustic wave and the scattering light wave, the former is produced by the stimulated forward scatting and the latter by the stimulated backward scatting or scattering in other directions. From the wavelength shifts and period of the spectra, the temperature or drift velocity of the coronal plasma and the direction of forward scattering can be estimated.</p> <br/>Acta Physica Sinica. 1988 37(4): 557-565. Published 1988-02-05 Author(s): XU- ZHI-ZHAN, TANG YONG-HONG, QIAN AI-DI <br/><p>Periodic structure of stimulated Brillouin backscattering spectra have been observed in ex-periments of intense Nd glass laser irradiating planar targets. Analysis and calculation indicate that this period structure results from the interaction between the ion-acoustic wave and the scattering light wave, the former is produced by the stimulated forward scatting and the latter by the stimulated backward scatting or scattering in other directions. From the wavelength shifts and period of the spectra, the temperature or drift velocity of the coronal plasma and the direction of forward scattering can be estimated.</p> <br/>Acta Physica Sinica. 1988 37(4): 557-565. Published 1988-02-05 INDIRECT EVIDENCE OF FORWARD SCATTERING——PERIODIC STRUCTURE OF THE STIMULATED BRILLOUIN SCATTERING SPECTRA OBTAINED IN LASER.PLASMA INTERACTION EXPERIMENTS XU- ZHI-ZHAN, TANG YONG-HONG, QIAN AI-DI 1988-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(4): 557-565. article doi:10.7498/aps.37.557 10.7498/aps.37.557 Acta Physica Sinica 37 4 1988-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.557 557-565 //www.getgobooth.com/en/article/doi/10.7498/aps.37.566 Author(s): CHEN BAO-ZHEN <br/><p>In this article, the second order perturbation theory is used to obtain the expression of T-matrix for the Simultaneous photon-electron excitations of hydrogen. The convergence and resonance of the T-matrix are discussed in brief.</p> <br/>Acta Physica Sinica. 1988 37(4): 566-572. Published 1988-02-05 Author(s): CHEN BAO-ZHEN <br/><p>In this article, the second order perturbation theory is used to obtain the expression of T-matrix for the Simultaneous photon-electron excitations of hydrogen. The convergence and resonance of the T-matrix are discussed in brief.</p> <br/>Acta Physica Sinica. 1988 37(4): 566-572. Published 1988-02-05 SIMULTANEOUS PHOTON-ELECTRON EXCITATIONS OF HYDROGEN CHEN BAO-ZHEN 1988-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(4): 566-572. article doi:10.7498/aps.37.566 10.7498/aps.37.566 Acta Physica Sinica 37 4 1988-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.566 566-572 //www.getgobooth.com/en/article/doi/10.7498/aps.37.573 Author(s): LIN REN-MING, HUANG SI-XIAN, ZHANG LIN <br/><p>The systematic method of Fokker-Planck equation (FPE) for the generalized Wigner distribution is used to study the multi-photon transition process of a driven optical system. The general multi-photon FPE, the state equation and the spectrum of transmitted light in good cavity limit are obtained- The two-photon optical bistability spectrum of transmitted light is calculated and compared with single-photon case. It is shown that for multi-photon case, the atom -atom correlation is also negligible in the good cavity limit.</p> <br/>Acta Physica Sinica. 1988 37(4): 573-581. Published 1988-02-05 Author(s): LIN REN-MING, HUANG SI-XIAN, ZHANG LIN <br/><p>The systematic method of Fokker-Planck equation (FPE) for the generalized Wigner distribution is used to study the multi-photon transition process of a driven optical system. The general multi-photon FPE, the state equation and the spectrum of transmitted light in good cavity limit are obtained- The two-photon optical bistability spectrum of transmitted light is calculated and compared with single-photon case. It is shown that for multi-photon case, the atom -atom correlation is also negligible in the good cavity limit.</p> <br/>Acta Physica Sinica. 1988 37(4): 573-581. Published 1988-02-05 THE MULTI-PHOTON QUANTUM STATISTICAL THEORY OF DRIVEN OPTICAL SYSTEMS (Ⅰ)——FOKKER-PLANCK EQUATION AND GOOD CAVITY CASE LIN REN-MING, HUANG SI-XIAN, ZHANG LIN 1988-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(4): 573-581. article doi:10.7498/aps.37.573 10.7498/aps.37.573 Acta Physica Sinica 37 4 1988-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.573 573-581 //www.getgobooth.com/en/article/doi/10.7498/aps.37.582 Author(s): GU GUO QING, TAO RUI-BAO <br/><p>The first-principle approach for calculating the D. C. conductivities of the composites is discussed systematically. The integral equation for determining the effective conductivities of the composites with local anisotropic componentes is derived, and a convenient method for calculating effective conductivity tensor is proposed. We have dealt with effective conductivity tensor of the composites with local anisotropic components. A theoretical method which can treat the more common composites with no periodicity is developed. A new approximate method for solving integral equation by means of expansion with two bases is also proposed, by which we can calculate composites with large porosity and complicate structure with high precision, and it could have the advantage of saving lot of computing time.</p> <br/>Acta Physica Sinica. 1988 37(4): 582-588. Published 1988-02-05 Author(s): GU GUO QING, TAO RUI-BAO <br/><p>The first-principle approach for calculating the D. C. conductivities of the composites is discussed systematically. The integral equation for determining the effective conductivities of the composites with local anisotropic componentes is derived, and a convenient method for calculating effective conductivity tensor is proposed. We have dealt with effective conductivity tensor of the composites with local anisotropic components. A theoretical method which can treat the more common composites with no periodicity is developed. A new approximate method for solving integral equation by means of expansion with two bases is also proposed, by which we can calculate composites with large porosity and complicate structure with high precision, and it could have the advantage of saving lot of computing time.</p> <br/>Acta Physica Sinica. 1988 37(4): 582-588. Published 1988-02-05 A METHOD FOR CALCULATING D. C. CONDUCTIVITIES OF THE POROUS MEDIUM AND COMPOSITE (Ⅱ)——AN APPROACH TO THE ISOTROPIC AND ANISOTROPIC COMPOSITE GU GUO QING, TAO RUI-BAO 1988-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(4): 582-588. article doi:10.7498/aps.37.582 10.7498/aps.37.582 Acta Physica Sinica 37 4 1988-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.582 582-588 //www.getgobooth.com/en/article/doi/10.7498/aps.37.589 Author(s): SHI HANG, CAI JIAN-HUA <br/><p>Electromagnetic modes are studied in the long wavelength limit, with a nonlocal dielectric tensor valid in this limit and at low temperatures and adaptable to type-l semiconductor superlauices, such as GaAs/GaAlAs alternative multilayers. The TM and TE modes are considered and dispersion relations are obtained respectively.</p> <br/>Acta Physica Sinica. 1988 37(4): 589-597. Published 1988-02-05 Author(s): SHI HANG, CAI JIAN-HUA <br/><p>Electromagnetic modes are studied in the long wavelength limit, with a nonlocal dielectric tensor valid in this limit and at low temperatures and adaptable to type-l semiconductor superlauices, such as GaAs/GaAlAs alternative multilayers. The TM and TE modes are considered and dispersion relations are obtained respectively.</p> <br/>Acta Physica Sinica. 1988 37(4): 589-597. Published 1988-02-05 ELECTROMAGNETIC MODES IN SUPERLATTICES WITH NONLOCAL DIELECTRIC FUNCTION SHI HANG, CAI JIAN-HUA 1988-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(4): 589-597. article doi:10.7498/aps.37.589 10.7498/aps.37.589 Acta Physica Sinica 37 4 1988-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.589 589-597 //www.getgobooth.com/en/article/doi/10.7498/aps.37.598 Author(s): XU WANG, LI ZHENG-ZHONG <br/><p>A two-conduction band lattice Anderson hamiltonian is studied by the Slave-Boson technique and the functional integral method. The electronic density of states (DOS) of the system as well as low temperature thermodynamic quantities are obtained under the saddle point approximation. The results show that a pseudo-gap structure in DOS appears near the Fermi level due to the f-c hybridization and the coherence effect, and the low temperature thermodynamic quantities of the system possess the heavy-fermion properties.</p> <br/>Acta Physica Sinica. 1988 37(4): 598-607. Published 1988-02-05 Author(s): XU WANG, LI ZHENG-ZHONG <br/><p>A two-conduction band lattice Anderson hamiltonian is studied by the Slave-Boson technique and the functional integral method. The electronic density of states (DOS) of the system as well as low temperature thermodynamic quantities are obtained under the saddle point approximation. The results show that a pseudo-gap structure in DOS appears near the Fermi level due to the f-c hybridization and the coherence effect, and the low temperature thermodynamic quantities of the system possess the heavy-fermion properties.</p> <br/>Acta Physica Sinica. 1988 37(4): 598-607. Published 1988-02-05 A SLAVE-BOSON MEAN FIELD THEORY FOR THE TWO-CONDUCTION BAND LATTICE ANDERSON MODEL XU WANG, LI ZHENG-ZHONG 1988-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(4): 598-607. article doi:10.7498/aps.37.598 10.7498/aps.37.598 Acta Physica Sinica 37 4 1988-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.598 598-607 //www.getgobooth.com/en/article/doi/10.7498/aps.37.608 Author(s): TAO RUI-BAO, CHEN CHUAN-HONG, CHEN SHI-JIE <br/><p>General expressions for elastic constants and analytic formulas for calculating force constants from the elastic constants were derived by means of group theory. On the basis of an approxomation of four nearest neighbour force constants, several ultrasonic wave velocities were calculated for LaNbO4 crystal.</p> <br/>Acta Physica Sinica. 1988 37(4): 608-617. Published 1988-02-05 Author(s): TAO RUI-BAO, CHEN CHUAN-HONG, CHEN SHI-JIE <br/><p>General expressions for elastic constants and analytic formulas for calculating force constants from the elastic constants were derived by means of group theory. On the basis of an approxomation of four nearest neighbour force constants, several ultrasonic wave velocities were calculated for LaNbO4 crystal.</p> <br/>Acta Physica Sinica. 1988 37(4): 608-617. Published 1988-02-05 CALCULATIONS OF ELASTIC CONSTANTS AND ULTRASONIC VELOCITIES FOR LaNbO4 CRYSTAL TAO RUI-BAO, CHEN CHUAN-HONG, CHEN SHI-JIE 1988-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(4): 608-617. article doi:10.7498/aps.37.608 10.7498/aps.37.608 Acta Physica Sinica 37 4 1988-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.608 608-617 //www.getgobooth.com/en/article/doi/10.7498/aps.37.618 Author(s): LI XIAO-SHEN, GONG CHANG-DE <br/><p>The surface-dressed optical Bloch equations and the Maxwell equations are combined consistently to obtain spontaneous decay rates and frequency shifts for an atom near the surface of a superlattice film with periodic or quasi-periodic structure. The effects of the number, thickness and dielectric properties of the layers constructing this film on the spontaneous emission properties are discussed. The results for the two different cases of periodic structure and quasi periodic structure are comparable.</p> <br/>Acta Physica Sinica. 1988 37(4): 618-628. Published 1988-02-05 Author(s): LI XIAO-SHEN, GONG CHANG-DE <br/><p>The surface-dressed optical Bloch equations and the Maxwell equations are combined consistently to obtain spontaneous decay rates and frequency shifts for an atom near the surface of a superlattice film with periodic or quasi-periodic structure. The effects of the number, thickness and dielectric properties of the layers constructing this film on the spontaneous emission properties are discussed. The results for the two different cases of periodic structure and quasi periodic structure are comparable.</p> <br/>Acta Physica Sinica. 1988 37(4): 618-628. Published 1988-02-05 SPONTANEOUS EMISSION OF AN ATOM NEAR THE SURFACE OF A SUPERLATTICE FILM WITH PERIODIC OR QUASI-PERIODIC STRUCTURE LI XIAO-SHEN, GONG CHANG-DE 1988-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(4): 618-628. article doi:10.7498/aps.37.618 10.7498/aps.37.618 Acta Physica Sinica 37 4 1988-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.618 618-628 //www.getgobooth.com/en/article/doi/10.7498/aps.37.629 Author(s): JIANG ZUI-MIN, WU ZI-QIN <br/><p>In this paper, the atomic vibration modes of Si(lll) planar strcture with different layers have been calculated using the dynamic matrix method. The Raman frenquency shift, which moves to lower wave number greatly for microcrystals compared with single crystals, can be explained by the activation of surface modes. By hybridized orbical theroy, the change of surface force constants was obtained. The calculated frequency of surface modes, 469cm-1, is close to the experimental result 430 cm-1 first reported by Okada.</p> <br/>Acta Physica Sinica. 1988 37(4): 629-637. Published 1988-02-05 Author(s): JIANG ZUI-MIN, WU ZI-QIN <br/><p>In this paper, the atomic vibration modes of Si(lll) planar strcture with different layers have been calculated using the dynamic matrix method. The Raman frenquency shift, which moves to lower wave number greatly for microcrystals compared with single crystals, can be explained by the activation of surface modes. By hybridized orbical theroy, the change of surface force constants was obtained. The calculated frequency of surface modes, 469cm-1, is close to the experimental result 430 cm-1 first reported by Okada.</p> <br/>Acta Physica Sinica. 1988 37(4): 629-637. Published 1988-02-05 SURFACE VIBRATION MODES OF Si(111) JIANG ZUI-MIN, WU ZI-QIN 1988-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(4): 629-637. article doi:10.7498/aps.37.629 10.7498/aps.37.629 Acta Physica Sinica 37 4 1988-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.629 629-637 //www.getgobooth.com/en/article/doi/10.7498/aps.37.638 Author(s): YANG GUO-CHEN, ZHANG ZHI-DONG <br/><p>A cell theory of nematic liquid crystals is presented, which provides a calculable theoretical model for investigation of molecular short-range correlations. Numerical calculations are made for PAA The theoretical values are improved in compared with the other theories'. The effects of molecular correlations on calculated results and relations between the cell theory and the other theories are discussed.</p> <br/>Acta Physica Sinica. 1988 37(4): 638-644. Published 1988-02-05 Author(s): YANG GUO-CHEN, ZHANG ZHI-DONG <br/><p>A cell theory of nematic liquid crystals is presented, which provides a calculable theoretical model for investigation of molecular short-range correlations. Numerical calculations are made for PAA The theoretical values are improved in compared with the other theories'. The effects of molecular correlations on calculated results and relations between the cell theory and the other theories are discussed.</p> <br/>Acta Physica Sinica. 1988 37(4): 638-644. Published 1988-02-05 SHORT-RANGE CORRELATIONS IN MOLECULAR THEORIES OF NEMATIC LIQUID CRYSTALS YANG GUO-CHEN, ZHANG ZHI-DONG 1988-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(4): 638-644. article doi:10.7498/aps.37.638 10.7498/aps.37.638 Acta Physica Sinica 37 4 1988-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.638 638-644 //www.getgobooth.com/en/article/doi/10.7498/aps.37.645 Author(s): ZHONG WEN-DING, LAN JIAN, LIU ZUN-XIAO <br/><p>The magnetic properties of the pseudobinary compounds Dy (Fe0.9M0.1)2 (M = B, Al, Ga) have been studied. Substitution of M atoms for Fe atoms decreases the Curie temperature and varies the magnetic moment of the Fe atom. The coercivity of the samples increases very rapidly with decreasing temperature. This increase is considerably enhanced by the substitution elements. Anomalous phenomena and pronounced thermomagnetic history effects are observed in the temperature dependence of the magnetization. These effects may be explained by a local environment of iron atom and by an exponential increase in magnetic hardness on lowering the temperature.</p> <br/>Acta Physica Sinica. 1988 37(4): 645-649. Published 1988-02-05 Author(s): ZHONG WEN-DING, LAN JIAN, LIU ZUN-XIAO <br/><p>The magnetic properties of the pseudobinary compounds Dy (Fe0.9M0.1)2 (M = B, Al, Ga) have been studied. Substitution of M atoms for Fe atoms decreases the Curie temperature and varies the magnetic moment of the Fe atom. The coercivity of the samples increases very rapidly with decreasing temperature. This increase is considerably enhanced by the substitution elements. Anomalous phenomena and pronounced thermomagnetic history effects are observed in the temperature dependence of the magnetization. These effects may be explained by a local environment of iron atom and by an exponential increase in magnetic hardness on lowering the temperature.</p> <br/>Acta Physica Sinica. 1988 37(4): 645-649. Published 1988-02-05 MAGNETIC STUDY OF THE PSEUDOBINARY Dy(Fe0.9M0.1)2 (M= B, Al, Ga) COMPOUNDS ZHONG WEN-DING, LAN JIAN, LIU ZUN-XIAO 1988-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(4): 645-649. article doi:10.7498/aps.37.645 10.7498/aps.37.645 Acta Physica Sinica 37 4 1988-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.645 645-649 //www.getgobooth.com/en/article/doi/10.7498/aps.37.650 Author(s): WANG WEI, YAO XI-XIAN <br/><p>Under the mean-field approximation, the Josephson tunnelling of superconductor-grain-superconductor junction is analyzed in this paper by using the path-integral formulation. For the cases with coupling and without coupling between the grains, the temperature deperdence of Josephson critical current Ic and the phase dependence of Josephson current I are obtained.</p> <br/>Acta Physica Sinica. 1988 37(4): 650-654. Published 1988-02-05 Author(s): WANG WEI, YAO XI-XIAN <br/><p>Under the mean-field approximation, the Josephson tunnelling of superconductor-grain-superconductor junction is analyzed in this paper by using the path-integral formulation. For the cases with coupling and without coupling between the grains, the temperature deperdence of Josephson critical current Ic and the phase dependence of Josephson current I are obtained.</p> <br/>Acta Physica Sinica. 1988 37(4): 650-654. Published 1988-02-05 THE JOSEPHSON TUNNELLING OF SUPERCONDUCTOR-GRAIN-SUPERCONDUCTOR JUNCTION (S-G-S) WANG WEI, YAO XI-XIAN 1988-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(4): 650-654. article doi:10.7498/aps.37.650 10.7498/aps.37.650 Acta Physica Sinica 37 4 1988-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.650 650-654 //www.getgobooth.com/en/article/doi/10.7498/aps.37.655 Author(s): ZHANG YAN-ZHONG <br/><p>Disaccommodation (DA) of initial permeability of metallic glass (Fe0.8Ni0.15Cr0.05)78Si8B14 was measured at various temperatures in the range of 77-553 K. The measurements have shown that DA exhibits an asymmetric spectrum with a single relaxation peak. Kinetic behaviour of DA was examined at 273 K. An asymmetric activation energy spectrum with a single peak and the most probable activation energy of 1.40 eV was obtained by fitting a kinetic curve of DA by means of Hesse-Rubartsch's method. Effect of annealing on DA and kinetic behaviour of the annealing were examined. It was shown that the annealing essentially affects on DA and the kinetice behaviour of the annealing is approximateiy governed by Int kinetics.</p> <br/>Acta Physica Sinica. 1988 37(4): 655-659. Published 1988-02-05 Author(s): ZHANG YAN-ZHONG <br/><p>Disaccommodation (DA) of initial permeability of metallic glass (Fe0.8Ni0.15Cr0.05)78Si8B14 was measured at various temperatures in the range of 77-553 K. The measurements have shown that DA exhibits an asymmetric spectrum with a single relaxation peak. Kinetic behaviour of DA was examined at 273 K. An asymmetric activation energy spectrum with a single peak and the most probable activation energy of 1.40 eV was obtained by fitting a kinetic curve of DA by means of Hesse-Rubartsch's method. Effect of annealing on DA and kinetic behaviour of the annealing were examined. It was shown that the annealing essentially affects on DA and the kinetice behaviour of the annealing is approximateiy governed by Int kinetics.</p> <br/>Acta Physica Sinica. 1988 37(4): 655-659. Published 1988-02-05 DISACCMMODATION PHENOMENON IN METALLIC GLASS (Fe0.8Ni0.15Cr0.05)78Si8B14 ZHANG YAN-ZHONG 1988-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(4): 655-659. article doi:10.7498/aps.37.655 10.7498/aps.37.655 Acta Physica Sinica 37 4 1988-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.655 655-659 //www.getgobooth.com/en/article/doi/10.7498/aps.37.660 Author(s): SHI YOU-CHUN, LIU GUANG-ZHAO, ZHONG WEI-ZHUO <br/><p>We use the stress energy function suggested by van der Hoek et al. to simulate the formation of dislocation hollow cores. Both average formation energy of the solid-fluid bond ω and driving force △μ affect the formation of hollow cores greatly. The relation between radius of hollow core and diffussion is expressed by the back-force effect. The results of our Monte-Carlo simulation show that a straight step passing a dislocation will be retarded by the stress field.</p> <br/>Acta Physica Sinica. 1988 37(4): 660-665. Published 1988-02-05 Author(s): SHI YOU-CHUN, LIU GUANG-ZHAO, ZHONG WEI-ZHUO <br/><p>We use the stress energy function suggested by van der Hoek et al. to simulate the formation of dislocation hollow cores. Both average formation energy of the solid-fluid bond ω and driving force △μ affect the formation of hollow cores greatly. The relation between radius of hollow core and diffussion is expressed by the back-force effect. The results of our Monte-Carlo simulation show that a straight step passing a dislocation will be retarded by the stress field.</p> <br/>Acta Physica Sinica. 1988 37(4): 660-665. Published 1988-02-05 A MONTE-CARLO SIMULATION STUDY ON THE INFLUENCE OF THE STRESS FIELD ASSOCIATED WITH A DISLOCATION ON CRYSTAL GROWTH SHI YOU-CHUN, LIU GUANG-ZHAO, ZHONG WEI-ZHUO 1988-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(4): 660-665. article doi:10.7498/aps.37.660 10.7498/aps.37.660 Acta Physica Sinica 37 4 1988-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.660 660-665 //www.getgobooth.com/en/article/doi/10.7498/aps.37.666 Author(s): QIU YUN-QING, XIA MENG-FEN <br/><p>The unperturbed separatrix crossings driven by a single wave are discussed. The separa-trix crossings are followed by a mixing process, and a small-scale structure occurs in the distribution function in h-ψ plane. The separatrix crossings form a convective process in h-ψ plane, and the convective flux and the net flux are calculated. The separatrix crossings are accompanied by a radial flux, which is composed of a directional flux and a diffusional flux, both of them are calculated.</p> <br/>Acta Physica Sinica. 1988 37(4): 666-669. Published 1988-02-05 Author(s): QIU YUN-QING, XIA MENG-FEN <br/><p>The unperturbed separatrix crossings driven by a single wave are discussed. The separa-trix crossings are followed by a mixing process, and a small-scale structure occurs in the distribution function in h-ψ plane. The separatrix crossings form a convective process in h-ψ plane, and the convective flux and the net flux are calculated. The separatrix crossings are accompanied by a radial flux, which is composed of a directional flux and a diffusional flux, both of them are calculated.</p> <br/>Acta Physica Sinica. 1988 37(4): 666-669. Published 1988-02-05 THE EFFECTS OF TRANSITIONAL PARTICLES DRIVEN BY SINGLE WAVE QIU YUN-QING, XIA MENG-FEN 1988-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(4): 666-669. article doi:10.7498/aps.37.666 10.7498/aps.37.666 Acta Physica Sinica 37 4 1988-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.666 666-669 //www.getgobooth.com/en/article/doi/10.7498/aps.37.670 Author(s): WANG ZHENG-MIN, YANG LI-SHU, LIU ZONG-CAI, WU CHUANG-XIU <br/><p>The optothermal spectrum of infrared MPA of CF3CDC12 obtained by using optothermal cell with a platinum filament as a detector is reported here. It is found that the absorption peak at 944 cm-1 in infrared linear absorption spectrum splits into two peaks at 947 cm-1 and 927cm-1 in MPA spectrum. This phenomenon could be related to-the coupling of normal vibrations produced by Coriolis forces and anharmonisity. So one could select a more suitable excited wavelength according to this new result in laser separation of deuterium isotop. The absoption peak at 986 cm-1 in infrared linear absorption spectrum shows a red shift of 6cm-1 in MPA spectrum. This is due to the anhamonicity of vibrational levels of the molecule.</p> <br/>Acta Physica Sinica. 1988 37(4): 670-673. Published 1988-02-05 Author(s): WANG ZHENG-MIN, YANG LI-SHU, LIU ZONG-CAI, WU CHUANG-XIU <br/><p>The optothermal spectrum of infrared MPA of CF3CDC12 obtained by using optothermal cell with a platinum filament as a detector is reported here. It is found that the absorption peak at 944 cm-1 in infrared linear absorption spectrum splits into two peaks at 947 cm-1 and 927cm-1 in MPA spectrum. This phenomenon could be related to-the coupling of normal vibrations produced by Coriolis forces and anharmonisity. So one could select a more suitable excited wavelength according to this new result in laser separation of deuterium isotop. The absoption peak at 986 cm-1 in infrared linear absorption spectrum shows a red shift of 6cm-1 in MPA spectrum. This is due to the anhamonicity of vibrational levels of the molecule.</p> <br/>Acta Physica Sinica. 1988 37(4): 670-673. Published 1988-02-05 THE OPTOTHERMAL SPECTRA OF INFRARED MULTIPHOTON ABSORPTION OF CF3CDCl2 WANG ZHENG-MIN, YANG LI-SHU, LIU ZONG-CAI, WU CHUANG-XIU 1988-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(4): 670-673. article doi:10.7498/aps.37.670 10.7498/aps.37.670 Acta Physica Sinica 37 4 1988-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.670 670-673 //www.getgobooth.com/en/article/doi/10.7498/aps.37.674 Author(s): TAN WEI-HAN, ZHANG WEI-PING <br/><p>First, on the base of the correlation function of atoms, we investigate the state function of resonance fluorescence field with one-photon transition and calculate its power spectrum which is totally identical to the Mollow's result. Then, we extend the method to the calculation of resonance fluorescence spectrum with two-photon transition. The results exhibit characteristics different from the one-photon transition.</p> <br/>Acta Physica Sinica. 1988 37(4): 674-679. Published 1988-02-05 Author(s): TAN WEI-HAN, ZHANG WEI-PING <br/><p>First, on the base of the correlation function of atoms, we investigate the state function of resonance fluorescence field with one-photon transition and calculate its power spectrum which is totally identical to the Mollow's result. Then, we extend the method to the calculation of resonance fluorescence spectrum with two-photon transition. The results exhibit characteristics different from the one-photon transition.</p> <br/>Acta Physica Sinica. 1988 37(4): 674-679. Published 1988-02-05 THE STATE FUNCTION OF RESONANCE FLUORESCENCE FIELD AND THE MANY-PHOTON TRANSITION SPECTRUM TAN WEI-HAN, ZHANG WEI-PING 1988-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(4): 674-679. article doi:10.7498/aps.37.674 10.7498/aps.37.674 Acta Physica Sinica 37 4 1988-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.674 674-679 //www.getgobooth.com/en/article/doi/10.7498/aps.37.680 Author(s): JIANG YI-JIAN, LI JING-ZHONG, ZENG LING-ZHI <br/><p>The crystal structure of tetragonal barium titanate (space group P 4 mm) was determined at 13.6℃, using the data collected by neutron four-circle diffractoraeter, R(F) = 0.0186. The O atoms near b sites distribute disorberly.</p> <br/>Acta Physica Sinica. 1988 37(4): 680-682. Published 1988-02-05 Author(s): JIANG YI-JIAN, LI JING-ZHONG, ZENG LING-ZHI <br/><p>The crystal structure of tetragonal barium titanate (space group P 4 mm) was determined at 13.6℃, using the data collected by neutron four-circle diffractoraeter, R(F) = 0.0186. The O atoms near b sites distribute disorberly.</p> <br/>Acta Physica Sinica. 1988 37(4): 680-682. Published 1988-02-05 NEUTRON DIFFRACTION STUDY OF TETRAGONAL BARIUM TITANATE JIANG YI-JIAN, LI JING-ZHONG, ZENG LING-ZHI 1988-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(4): 680-682. article doi:10.7498/aps.37.680 10.7498/aps.37.680 Acta Physica Sinica 37 4 1988-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.680 680-682 //www.getgobooth.com/en/article/doi/10.7498/aps.37.683 Author(s): SHI HANG, CAI JIAN-HUA <br/><p>We generalize our former work to superlattices with finite number of layers, and obtain the corresponding dispersion relations for the bulk as well as the surface modes. Numerical computations show a superlattice with 20 supercells behaves already very near to an infinite su-perlattice with regard to the propagation characteristics of electromagnetic waves. However, important differences appear when the number of supercells is small.</p> <br/>Acta Physica Sinica. 1988 37(4): 683-687. Published 1988-02-05 Author(s): SHI HANG, CAI JIAN-HUA <br/><p>We generalize our former work to superlattices with finite number of layers, and obtain the corresponding dispersion relations for the bulk as well as the surface modes. Numerical computations show a superlattice with 20 supercells behaves already very near to an infinite su-perlattice with regard to the propagation characteristics of electromagnetic waves. However, important differences appear when the number of supercells is small.</p> <br/>Acta Physica Sinica. 1988 37(4): 683-687. Published 1988-02-05 POLARITIONS IN FINITE SUPERLATTICES SHI HANG, CAI JIAN-HUA 1988-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(4): 683-687. article doi:10.7498/aps.37.683 10.7498/aps.37.683 Acta Physica Sinica 37 4 1988-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.683 683-687 //www.getgobooth.com/en/article/doi/10.7498/aps.37.688 Author(s): PANG GEN-DI, CAI JIAN-HUA <br/><p>By the analogy between electron and phonon behaviors,results of renormalization study of the electron localization problem are used to obtain informations of phonon localization in inhomogeneous disordered systems. It is found that three mobility edges may appear in the phonon spectrum of such systems.</p> <br/>Acta Physica Sinica. 1988 37(4): 688-690. Published 1988-02-05 Author(s): PANG GEN-DI, CAI JIAN-HUA <br/><p>By the analogy between electron and phonon behaviors,results of renormalization study of the electron localization problem are used to obtain informations of phonon localization in inhomogeneous disordered systems. It is found that three mobility edges may appear in the phonon spectrum of such systems.</p> <br/>Acta Physica Sinica. 1988 37(4): 688-690. Published 1988-02-05 PHONON LOCALIZATION IN INHOMOGENEOUS DISORDERED SYSTEMS PANG GEN-DI, CAI JIAN-HUA 1988-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(4): 688-690. article doi:10.7498/aps.37.688 10.7498/aps.37.688 Acta Physica Sinica 37 4 1988-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.688 688-690 //www.getgobooth.com/en/article/doi/10.7498/aps.37.691 Author(s): PANG GEN-DI, CAI JIAN-HUA <br/><p>The wave functions of electrons in superlattices with random layer thicknesses are studied. They are localized in the direction perpendicular to the layers characteristic of one-dimensional systems and extended in the plane of the leyers. Numerical results of computation of localization lengths are given.</p> <br/>Acta Physica Sinica. 1988 37(4): 691-693. Published 1988-02-05 Author(s): PANG GEN-DI, CAI JIAN-HUA <br/><p>The wave functions of electrons in superlattices with random layer thicknesses are studied. They are localized in the direction perpendicular to the layers characteristic of one-dimensional systems and extended in the plane of the leyers. Numerical results of computation of localization lengths are given.</p> <br/>Acta Physica Sinica. 1988 37(4): 691-693. Published 1988-02-05 CHARACTERISTICS OF ELECTRONIC WAVE FUNCTIONS IN SUPERLATTICES WITH RANDOM LAYER THICKNESS PANG GEN-DI, CAI JIAN-HUA 1988-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(4): 691-693. article doi:10.7498/aps.37.691 10.7498/aps.37.691 Acta Physica Sinica 37 4 1988-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.691 691-693 //www.getgobooth.com/en/article/doi/10.7498/aps.37.694 Author(s): XING XIU-SAN <br/><p>The production kinetics of thermal defects is discussed. The formula for thermal defect concentration has been derived.</p> <br/>Acta Physica Sinica. 1988 37(4): 694-697. Published 1988-02-05 Author(s): XING XIU-SAN <br/><p>The production kinetics of thermal defects is discussed. The formula for thermal defect concentration has been derived.</p> <br/>Acta Physica Sinica. 1988 37(4): 694-697. Published 1988-02-05 THE PRODUCTION KINETICS OF THERMAL DEFECTS IN CRYSTALS XING XIU-SAN 1988-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(4): 694-697. article doi:10.7498/aps.37.694 10.7498/aps.37.694 Acta Physica Sinica 37 4 1988-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.694 694-697 //www.getgobooth.com/en/article/doi/10.7498/aps.37.698 Author(s): WU ZHEN-SEN, WANG YI-PING <br/><p>In this paper, starting from transport theory, estimated functions of Monte carlo direct analogue and statistical estimation have been obtained by means of term wise integration. We deal with variations of transmissivity and reflectivity in optical thickness τ, albedo of a single partical a, and anisotropy g when plane wave passes through a layer discrete random media. The results of statistical estimation method are in good agreement with those given in reference [2]. As a result of considerable statistical fluctuation of scattering point samples in direct analogue method, the deviation of calculation would be larger as the optical thickness increases or anisotropic scattering or absorption becomes stronger.</p> <br/>Acta Physica Sinica. 1988 37(4): 698-704. Published 1988-02-05 Author(s): WU ZHEN-SEN, WANG YI-PING <br/><p>In this paper, starting from transport theory, estimated functions of Monte carlo direct analogue and statistical estimation have been obtained by means of term wise integration. We deal with variations of transmissivity and reflectivity in optical thickness τ, albedo of a single partical a, and anisotropy g when plane wave passes through a layer discrete random media. The results of statistical estimation method are in good agreement with those given in reference [2]. As a result of considerable statistical fluctuation of scattering point samples in direct analogue method, the deviation of calculation would be larger as the optical thickness increases or anisotropic scattering or absorption becomes stronger.</p> <br/>Acta Physica Sinica. 1988 37(4): 698-704. Published 1988-02-05 STUDY OF SCATTERING OF PLANE WAVE THROUGH DISCRETE RANDOM MEDIUM BY DIRECT ANALOGUE AND STATISTICAL ESTIMATION WU ZHEN-SEN, WANG YI-PING 1988-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1988 37(4): 698-704. article doi:10.7498/aps.37.698 10.7498/aps.37.698 Acta Physica Sinica 37 4 1988-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.37.698 698-704

map