//m.getgobooth.com/ 必威体育下载 daily 15 2024-09-05 15:36:22 apsoffice@iphy.ac.cn apsoffice@iphy.ac.cn 2024-09-05 15:36:22 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 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1553 Author(s): HUANG XIANG-YOU <br/><p>Basing on the classical trajectory motion for an electron circling an atomic nucleus and averaging the motion over initial coordinate parameters of ellipse trajectories for the electron, we get a density distribution in space. This distribution is consistent with probability density of stationary state for hydrogen atom in the classical limit. This comparison shows that a wave function of hydrogen atom in stationary state does not describe an individual atom but an ensemble.</p> <br/>Acta Physica Sinica. 1991 40(10): 1553-1561. Published 1991-05-05 Author(s): HUANG XIANG-YOU <br/><p>Basing on the classical trajectory motion for an electron circling an atomic nucleus and averaging the motion over initial coordinate parameters of ellipse trajectories for the electron, we get a density distribution in space. This distribution is consistent with probability density of stationary state for hydrogen atom in the classical limit. This comparison shows that a wave function of hydrogen atom in stationary state does not describe an individual atom but an ensemble.</p> <br/>Acta Physica Sinica. 1991 40(10): 1553-1561. Published 1991-05-05 ANALYSIS OF WAVE FUNCTIONS FOR HYDROGEN ATOMS IN CLASSICAL LIMIT HUANG XIANG-YOU 1991-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(10): 1553-1561. article doi:10.7498/aps.40.1553 10.7498/aps.40.1553 Acta Physica Sinica 40 10 1991-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1553 1553-1561 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1562 Author(s): LIU QUAN-HUI, WANG FA-BO <br/><p>In this paper, we give the double wave function theory for systems of planar and spherical rotator, obtain rigorously the classical mechanical equations of motion for these two systems study the related problems in the ordinary quantum theory for these sfstems.</p> <br/>Acta Physica Sinica. 1991 40(10): 1562-1566. Published 1991-05-05 Author(s): LIU QUAN-HUI, WANG FA-BO <br/><p>In this paper, we give the double wave function theory for systems of planar and spherical rotator, obtain rigorously the classical mechanical equations of motion for these two systems study the related problems in the ordinary quantum theory for these sfstems.</p> <br/>Acta Physica Sinica. 1991 40(10): 1562-1566. Published 1991-05-05 DOUBLE WAVE FUNCTION APPROACHES TO SYSTEMS OF PLANAR AND SPHERICAL ROTATOR LIU QUAN-HUI, WANG FA-BO 1991-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(10): 1562-1566. article doi:10.7498/aps.40.1562 10.7498/aps.40.1562 Acta Physica Sinica 40 10 1991-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1562 1562-1566 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1567 Author(s): LI JUN-QING, GU JIN-NAN, ZHU JIE-DING <br/><p>The spectral fluctuation properties of a quantum system are related closely to the dynamical symmetries of the system and its nonlinearity but not dependent upon number of the degrees of freedom. The energy spectrum of Helium atom is calculated, and by analysing the spectral fluctuations it is found that the residual one pair electron-electron interaction is not sufficient to change the dynamical symmetry of the nucleus-electron central field, eventhough the interaction is amplified artificially to a possible extent (as far as the dissociation of the system does not occur). It turns out that the contour plot of the potential intuitively gives the information about the symmetry of the system, indicates the degree of the symmetry breaking as well as the way how the symmetry is lost.</p> <br/>Acta Physica Sinica. 1991 40(10): 1567-1574. Published 1991-05-05 Author(s): LI JUN-QING, GU JIN-NAN, ZHU JIE-DING <br/><p>The spectral fluctuation properties of a quantum system are related closely to the dynamical symmetries of the system and its nonlinearity but not dependent upon number of the degrees of freedom. The energy spectrum of Helium atom is calculated, and by analysing the spectral fluctuations it is found that the residual one pair electron-electron interaction is not sufficient to change the dynamical symmetry of the nucleus-electron central field, eventhough the interaction is amplified artificially to a possible extent (as far as the dissociation of the system does not occur). It turns out that the contour plot of the potential intuitively gives the information about the symmetry of the system, indicates the degree of the symmetry breaking as well as the way how the symmetry is lost.</p> <br/>Acta Physica Sinica. 1991 40(10): 1567-1574. Published 1991-05-05 BIELECTRON INTERACTION IN HELIUM ATOM AND THE CORRESPONDING SPECTRAL STATISTICAL FLUCTUATION PROPERTIES LI JUN-QING, GU JIN-NAN, ZHU JIE-DING 1991-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(10): 1567-1574. article doi:10.7498/aps.40.1567 10.7498/aps.40.1567 Acta Physica Sinica 40 10 1991-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1567 1567-1574 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1575 Author(s): YANG GUO-JIAN, HUANG ZU-QIA, HU GANG <br/><p>Steady-state resonance fluorescence spectrum from a three-level atom driven coherently by two intense optical fields and damped by a squeezed vacuum is obtained, which shows the dependence of the spectrum strongly on the squeezing of the vacuum field and the phase difference between the squeezed component of the vacuum field and the driven fields.</p> <br/>Acta Physica Sinica. 1991 40(10): 1575-1583. Published 1991-05-05 Author(s): YANG GUO-JIAN, HUANG ZU-QIA, HU GANG <br/><p>Steady-state resonance fluorescence spectrum from a three-level atom driven coherently by two intense optical fields and damped by a squeezed vacuum is obtained, which shows the dependence of the spectrum strongly on the squeezing of the vacuum field and the phase difference between the squeezed component of the vacuum field and the driven fields.</p> <br/>Acta Physica Sinica. 1991 40(10): 1575-1583. Published 1991-05-05 STEADY-STATE RESONANCE FLUORESCENCE FROM A THREE-LEVEL ATOM IN A SQUEEZED VACUUM YANG GUO-JIAN, HUANG ZU-QIA, HU GANG 1991-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(10): 1575-1583. article doi:10.7498/aps.40.1575 10.7498/aps.40.1575 Acta Physica Sinica 40 10 1991-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1575 1575-1583 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1584 Author(s): CHEN RONG-QING, XU ZHI-ZHAN, SUN LAN, YAO GUAN-HUA, ZHANG WEN-QI, LI PING <br/><p>Previous studies on strong-field autoionization involving high-order ionization processes are mainly investigated for the cases of CW laser irradiations. This paper extends those studies to the cases of square laser pulses with arbitrary widths. Populations of the ground state and the line shapes of the autoionizing resonance are discussed. It is shown that strong-field autoionization and the high-order ionization processes are drastically affected not only by the intensities but also by the time of interaction between atoms and laser field.</p> <br/>Acta Physica Sinica. 1991 40(10): 1584-1589. Published 1991-05-05 Author(s): CHEN RONG-QING, XU ZHI-ZHAN, SUN LAN, YAO GUAN-HUA, ZHANG WEN-QI, LI PING <br/><p>Previous studies on strong-field autoionization involving high-order ionization processes are mainly investigated for the cases of CW laser irradiations. This paper extends those studies to the cases of square laser pulses with arbitrary widths. Populations of the ground state and the line shapes of the autoionizing resonance are discussed. It is shown that strong-field autoionization and the high-order ionization processes are drastically affected not only by the intensities but also by the time of interaction between atoms and laser field.</p> <br/>Acta Physica Sinica. 1991 40(10): 1584-1589. Published 1991-05-05 STRONG-FIELD AUTOIONIZATION BY SQUARE LASER PULSES CHEN RONG-QING, XU ZHI-ZHAN, SUN LAN, YAO GUAN-HUA, ZHANG WEN-QI, LI PING 1991-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(10): 1584-1589. article doi:10.7498/aps.40.1584 10.7498/aps.40.1584 Acta Physica Sinica 40 10 1991-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1584 1584-1589 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1590 Author(s): LIU QIANG, WANG JIAN-ZHONG, XU XIANG-DONG, CHEN XUE-JUN <br/><p>The exponential variation method is applied to the charge exchange in H++ H collisions in the present paper. The angular distributions have been calculated practically for two incident energies, 60 and 125 keV. The present results show that the obvious improvement with respect to BIB approximation can be obtained by the exponential variation method.</p> <br/>Acta Physica Sinica. 1991 40(10): 1590-1594. Published 1991-05-05 Author(s): LIU QIANG, WANG JIAN-ZHONG, XU XIANG-DONG, CHEN XUE-JUN <br/><p>The exponential variation method is applied to the charge exchange in H++ H collisions in the present paper. The angular distributions have been calculated practically for two incident energies, 60 and 125 keV. The present results show that the obvious improvement with respect to BIB approximation can be obtained by the exponential variation method.</p> <br/>Acta Physica Sinica. 1991 40(10): 1590-1594. Published 1991-05-05 EXPONENTIAL VARIATION METHOD FOR CHARGE EXCHANGE IN H++ H COLLISIONS LIU QIANG, WANG JIAN-ZHONG, XU XIANG-DONG, CHEN XUE-JUN 1991-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(10): 1590-1594. article doi:10.7498/aps.40.1590 10.7498/aps.40.1590 Acta Physica Sinica 40 10 1991-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1590 1590-1594 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1595 Author(s): CHEN XUE-JUN, ZHENG LIANG-YOU <br/><p>The multiple-scattering expansion method proposed in Ref [6] has been applied to the calculations for the triple differential cross sections of the (e,2e) collisions of atomic hydrogen under the Ehrhardt geometric conditions. The present results are in good agreement with the experimental data.</p> <br/>Acta Physica Sinica. 1991 40(10): 1595-1600. Published 1991-05-05 Author(s): CHEN XUE-JUN, ZHENG LIANG-YOU <br/><p>The multiple-scattering expansion method proposed in Ref [6] has been applied to the calculations for the triple differential cross sections of the (e,2e) collisions of atomic hydrogen under the Ehrhardt geometric conditions. The present results are in good agreement with the experimental data.</p> <br/>Acta Physica Sinica. 1991 40(10): 1595-1600. Published 1991-05-05 MULTIPLE-SCATTERING EXPANSION METHOD FOR (e,2e) COLLISIONS OF ATOMIC HYDROGEN CHEN XUE-JUN, ZHENG LIANG-YOU 1991-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(10): 1595-1600. article doi:10.7498/aps.40.1595 10.7498/aps.40.1595 Acta Physica Sinica 40 10 1991-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1595 1595-1600 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1601 Author(s): CHEN YAN-SONG, ZHENG SHI-HAI, LI DE-HUA <br/><p>Extraction of invariant moments used for pattern recognition is a subject in optics to be further studied. In this paper, an optical method utilizing a single holographic mask is presented for realizing two-dimensional geometric moment transform. The invariant moments of a group of English letters are extracted successfully, which indeed exhibit the invariant features under translating and rotating</p> <br/>Acta Physica Sinica. 1991 40(10): 1601-1606. Published 1991-05-05 Author(s): CHEN YAN-SONG, ZHENG SHI-HAI, LI DE-HUA <br/><p>Extraction of invariant moments used for pattern recognition is a subject in optics to be further studied. In this paper, an optical method utilizing a single holographic mask is presented for realizing two-dimensional geometric moment transform. The invariant moments of a group of English letters are extracted successfully, which indeed exhibit the invariant features under translating and rotating</p> <br/>Acta Physica Sinica. 1991 40(10): 1601-1606. Published 1991-05-05 TWO-DIMENSIONAL OPTICAL GEOMETRIC MOMENT TRANSFORM CHEN YAN-SONG, ZHENG SHI-HAI, LI DE-HUA 1991-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(10): 1601-1606. article doi:10.7498/aps.40.1601 10.7498/aps.40.1601 Acta Physica Sinica 40 10 1991-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1601 1601-1606 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1607 Author(s): LIU SHI-BING, HUANG CHANG-CHUN, LI HONG <br/><p>In this paper, the behavior of SU(2) squeezing of the mixed-state in two-level atom are studied by means of the time-evolution operator method. We have obtained new results that the mixed-state atomic squeezing under interacting of the light field is deeper than the general pure-state atomic SU(2) squeezing. Furthermore, the squeezing value of the atom in pseudo-ground state is more greater than that in pseudo-excited state. The relation between the statistical probability of atomic level population and the squeezing is studied by numerical calculations.</p> <br/>Acta Physica Sinica. 1991 40(10): 1607-1612. Published 1991-05-05 Author(s): LIU SHI-BING, HUANG CHANG-CHUN, LI HONG <br/><p>In this paper, the behavior of SU(2) squeezing of the mixed-state in two-level atom are studied by means of the time-evolution operator method. We have obtained new results that the mixed-state atomic squeezing under interacting of the light field is deeper than the general pure-state atomic SU(2) squeezing. Furthermore, the squeezing value of the atom in pseudo-ground state is more greater than that in pseudo-excited state. The relation between the statistical probability of atomic level population and the squeezing is studied by numerical calculations.</p> <br/>Acta Physica Sinica. 1991 40(10): 1607-1612. Published 1991-05-05 SU(2) SQUEEZING IN TWO-LEVEL ATOMIC MIXED-STATE LIU SHI-BING, HUANG CHANG-CHUN, LI HONG 1991-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(10): 1607-1612. article doi:10.7498/aps.40.1607 10.7498/aps.40.1607 Acta Physica Sinica 40 10 1991-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1607 1607-1612 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1613 Author(s): HE LIN-SHENG, JIANG HAI-HE, XIA YU-XING <br/><p>A scheme is proposed, in which the pulse train of squeezed light is generated via forward four-wave mixing through a nonlinear medium with third-order polarizability, coherently pumped by a train of pulses of modelocked laser. One of the quadrature noise compoments of the squeezed light is measured with a balanced homodyne detector using a pulse train as the local oscillation. The theoretical results show that the fairly high-intensity output of squeezed light can be achieved, and the noise-power spectrum of the light is almost completely squeezed and exhibits the form of a train of pulses, but the shape of squeezed spectrum is reversed with respect to that of the pulse train of the input light.</p> <br/>Acta Physica Sinica. 1991 40(10): 1613-1623. Published 1991-05-05 Author(s): HE LIN-SHENG, JIANG HAI-HE, XIA YU-XING <br/><p>A scheme is proposed, in which the pulse train of squeezed light is generated via forward four-wave mixing through a nonlinear medium with third-order polarizability, coherently pumped by a train of pulses of modelocked laser. One of the quadrature noise compoments of the squeezed light is measured with a balanced homodyne detector using a pulse train as the local oscillation. The theoretical results show that the fairly high-intensity output of squeezed light can be achieved, and the noise-power spectrum of the light is almost completely squeezed and exhibits the form of a train of pulses, but the shape of squeezed spectrum is reversed with respect to that of the pulse train of the input light.</p> <br/>Acta Physica Sinica. 1991 40(10): 1613-1623. Published 1991-05-05 GENERATION OF PULSED SQUEEZED LIGHT FIELD VIA FORWARD FOUR-WAVE MIXING HE LIN-SHENG, JIANG HAI-HE, XIA YU-XING 1991-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(10): 1613-1623. article doi:10.7498/aps.40.1613 10.7498/aps.40.1613 Acta Physica Sinica 40 10 1991-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1613 1613-1623 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1624 Author(s): SHU XIAO-JIAN <br/><p>The single-particle trajectories of relativistic electrons are studied in a magnetic field con-figuration consisting of a uniform axial guide field and a helical periodic wiggler field. The steady-state trajectories and the first order perturbed trajectories are analysed carefully. Based on the numerical simulations about the experiments which have been made at Shanghai Institute of Optics and Fine Mechanics, the effect of the betatron oscillations due to the transverse varing of wiggler field is first shown in the case that there is a axial guide field. In this case the betatron oscillations equations are drived. Its period and the relation between phase in X dirction and in Y dirction are obtioned. Further more, numerical simulations are made. The results of analytical calculation are in good agreement with the numerical simulations.</p> <br/>Acta Physica Sinica. 1991 40(10): 1624-1631. Published 1991-05-05 Author(s): SHU XIAO-JIAN <br/><p>The single-particle trajectories of relativistic electrons are studied in a magnetic field con-figuration consisting of a uniform axial guide field and a helical periodic wiggler field. The steady-state trajectories and the first order perturbed trajectories are analysed carefully. Based on the numerical simulations about the experiments which have been made at Shanghai Institute of Optics and Fine Mechanics, the effect of the betatron oscillations due to the transverse varing of wiggler field is first shown in the case that there is a axial guide field. In this case the betatron oscillations equations are drived. Its period and the relation between phase in X dirction and in Y dirction are obtioned. Further more, numerical simulations are made. The results of analytical calculation are in good agreement with the numerical simulations.</p> <br/>Acta Physica Sinica. 1991 40(10): 1624-1631. Published 1991-05-05 ELECTRON TRAJECTORIES AND STABILITY IN FEL WITH AN AXIAL GUIDE MAGNETIC FIELD SHU XIAO-JIAN 1991-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(10): 1624-1631. article doi:10.7498/aps.40.1624 10.7498/aps.40.1624 Acta Physica Sinica 40 10 1991-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1624 1624-1631 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1632 Author(s): SHENG ZHENG-MING, MA JING-XIU, XU ZHI-ZHAN <br/><p>The resonant absorption of light in cold plasma for linear density profile has been calculated analytically both for long and short scalelengths by calculating the reflectivity from the plasma and vaccum interface. The results in long scalelength case are in agreement with the well-known results but with a higher order in accuracy, and that in short scalelength case are consistent with numerical calculation.</p> <br/>Acta Physica Sinica. 1991 40(10): 1632-1637. Published 1991-05-05 Author(s): SHENG ZHENG-MING, MA JING-XIU, XU ZHI-ZHAN <br/><p>The resonant absorption of light in cold plasma for linear density profile has been calculated analytically both for long and short scalelengths by calculating the reflectivity from the plasma and vaccum interface. The results in long scalelength case are in agreement with the well-known results but with a higher order in accuracy, and that in short scalelength case are consistent with numerical calculation.</p> <br/>Acta Physica Sinica. 1991 40(10): 1632-1637. Published 1991-05-05 ANALYTICAL STUDY ON THE RESONANT ABSORPTION OF LIGHT IN NON-UNIFORM PLASMA SHENG ZHENG-MING, MA JING-XIU, XU ZHI-ZHAN 1991-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(10): 1632-1637. article doi:10.7498/aps.40.1632 10.7498/aps.40.1632 Acta Physica Sinica 40 10 1991-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1632 1632-1637 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1638 Author(s): CHEN YIN-HUA, ZHU DONG-PEI, YANG WEI-HONG <br/><p>In terms of Hasegawa-Wakatani equations,the nonlinear coupling of the electrostatic drift wave and the shear Alfven wave in magnetized plasmas has been investigated. The dipolar vortex solutions of the nonlinear equation system are obtained. These solutions belong to the intrinsic electromagnetic vortices, the corresponding magnetic field perturbations and the longitudinal current are continuous on the boundary of the vortex.</p> <br/>Acta Physica Sinica. 1991 40(10): 1638-1641. Published 1991-05-05 Author(s): CHEN YIN-HUA, ZHU DONG-PEI, YANG WEI-HONG <br/><p>In terms of Hasegawa-Wakatani equations,the nonlinear coupling of the electrostatic drift wave and the shear Alfven wave in magnetized plasmas has been investigated. The dipolar vortex solutions of the nonlinear equation system are obtained. These solutions belong to the intrinsic electromagnetic vortices, the corresponding magnetic field perturbations and the longitudinal current are continuous on the boundary of the vortex.</p> <br/>Acta Physica Sinica. 1991 40(10): 1638-1641. Published 1991-05-05 NONLINEAR COUPLING OF THE ELECTROSTATIC DRIFT WAVE AND SHEAR ALFVEN WAVE IN MAGNETIZED PLASMAS CHEN YIN-HUA, ZHU DONG-PEI, YANG WEI-HONG 1991-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(10): 1638-1641. article doi:10.7498/aps.40.1638 10.7498/aps.40.1638 Acta Physica Sinica 40 10 1991-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1638 1638-1641 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1642 Author(s): ZHANG JIA-TAI, XU LIN-BAO, CHANG TIE-QIANG, ZHANG SHO-GUI, NIE XIAO-BO, WANG SHI-HONG, WANG WEI-XING <br/><p>In this paper, an one and a half dimensional (1(1/2)-D, one space dimensionand two velocity dimension) plasma cloud-in-cell simulation code (CIC) has beendeveloped. It is used to study SRS in laser-plasma targets from the Shenguang-12# Nd-glass laser facility (λ=1.053μm,τ= 850ps IL= 3×1014—3×1015W/cm2). The results on the linear growth rates of the scattering electromagnetic waves and Lan-gmuir waves and nonlinear saturation are obtained in detail. Other results such as the time development of the electron distribution function and temperature and fraction of hot electron are also presented. In addition,temperature of thermal electron (1.4-2.5keV) in the underdense coronal plasma region is determined by spectrum analysis of SRS light, as well as contour figure for density distribution and averagedensity (0.12-0.14nc, n=1/4nc). These results agree with experiments.</p> <br/>Acta Physica Sinica. 1991 40(10): 1642-1651. Published 1991-05-05 Author(s): ZHANG JIA-TAI, XU LIN-BAO, CHANG TIE-QIANG, ZHANG SHO-GUI, NIE XIAO-BO, WANG SHI-HONG, WANG WEI-XING <br/><p>In this paper, an one and a half dimensional (1(1/2)-D, one space dimensionand two velocity dimension) plasma cloud-in-cell simulation code (CIC) has beendeveloped. It is used to study SRS in laser-plasma targets from the Shenguang-12# Nd-glass laser facility (λ=1.053μm,τ= 850ps IL= 3×1014—3×1015W/cm2). The results on the linear growth rates of the scattering electromagnetic waves and Lan-gmuir waves and nonlinear saturation are obtained in detail. Other results such as the time development of the electron distribution function and temperature and fraction of hot electron are also presented. In addition,temperature of thermal electron (1.4-2.5keV) in the underdense coronal plasma region is determined by spectrum analysis of SRS light, as well as contour figure for density distribution and averagedensity (0.12-0.14nc, n=1/4nc). These results agree with experiments.</p> <br/>Acta Physica Sinica. 1991 40(10): 1642-1651. Published 1991-05-05 STIMULATED RAMAN SCATTERING IN LASER PLASMA TARGETS ZHANG JIA-TAI, XU LIN-BAO, CHANG TIE-QIANG, ZHANG SHO-GUI, NIE XIAO-BO, WANG SHI-HONG, WANG WEI-XING 1991-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(10): 1642-1651. article doi:10.7498/aps.40.1642 10.7498/aps.40.1642 Acta Physica Sinica 40 10 1991-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1642 1642-1651 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1652 Author(s): CHEN YAN-PING, CAI SHI-DONG <br/><p>The linear gyrokinetic equation near gyrofrequency in the presentation of three independent electric field components is derived by following the method of Chen and Tsai. This equation is suitable for investigation of radiofrequency heating in the inhomogeneous plasmas-The solutions of the equation for axisymmetric tokamaks is given.</p> <br/>Acta Physica Sinica. 1991 40(10): 1652-1659. Published 1991-05-05 Author(s): CHEN YAN-PING, CAI SHI-DONG <br/><p>The linear gyrokinetic equation near gyrofrequency in the presentation of three independent electric field components is derived by following the method of Chen and Tsai. This equation is suitable for investigation of radiofrequency heating in the inhomogeneous plasmas-The solutions of the equation for axisymmetric tokamaks is given.</p> <br/>Acta Physica Sinica. 1991 40(10): 1652-1659. Published 1991-05-05 GYROKINETIC EQUATION APPLICABLE TO RADIOFREQUENCY HEATING CHEN YAN-PING, CAI SHI-DONG 1991-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(10): 1652-1659. article doi:10.7498/aps.40.1652 10.7498/aps.40.1652 Acta Physica Sinica 40 10 1991-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1652 1652-1659 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1660 Author(s): FU HUA-XIANG, YE LING <br/><p>By investigating orbital overlap population (OOP) resulting from the interaction between adatom and substrate Si atom, and total density of states of the cluster, it is found that Si(lll) 31/2×31/2- Sn has a half filled surface band which makesthe surface metallic. But for Si(lll) 31/2×31/2-Al, its bonding surface states are occupied fully with electrons and the antibonding surface states are empty, which makes the surface appear to be semiconducting. These calculation results are consistent with the experimental ones. A clear description on the interactions between Al, Sn and surface Si atom is also presented in this paper.</p> <br/>Acta Physica Sinica. 1991 40(10): 1660-1665. Published 1991-05-05 Author(s): FU HUA-XIANG, YE LING <br/><p>By investigating orbital overlap population (OOP) resulting from the interaction between adatom and substrate Si atom, and total density of states of the cluster, it is found that Si(lll) 31/2×31/2- Sn has a half filled surface band which makesthe surface metallic. But for Si(lll) 31/2×31/2-Al, its bonding surface states are occupied fully with electrons and the antibonding surface states are empty, which makes the surface appear to be semiconducting. These calculation results are consistent with the experimental ones. A clear description on the interactions between Al, Sn and surface Si atom is also presented in this paper.</p> <br/>Acta Physica Sinica. 1991 40(10): 1660-1665. Published 1991-05-05 COMPARISON BETWEEN THE ELECTRONIC STRUCTURES OF Si(lll) 31/2×31/2-Sn AND-Al FU HUA-XIANG, YE LING 1991-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(10): 1660-1665. article doi:10.7498/aps.40.1660 10.7498/aps.40.1660 Acta Physica Sinica 40 10 1991-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1660 1660-1665 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1666 Author(s): FU XIU-JUN, CHENG BO-LIN, ZHENG DA-FANG, LIU YOU-YAN <br/><p>By means of the decomposition-decimation method based on the renormalization-group technique, we have studied the properties of electronic energy spectrum for the two-dimensional Fibonacci quasicrystals. It is found that the spectrum has a multifurcating structure which is very different from the monofurcating structure of one-dimensional Fibonacci quasicrystals. By using the four-fold symmetry of the Fibonacci quasilattice under study, we have reduced the Hamiltonian and then performed a numerical simulation, the results of which are consistent with the analytical ones.</p> <br/>Acta Physica Sinica. 1991 40(10): 1666-1676. Published 1991-05-05 Author(s): FU XIU-JUN, CHENG BO-LIN, ZHENG DA-FANG, LIU YOU-YAN <br/><p>By means of the decomposition-decimation method based on the renormalization-group technique, we have studied the properties of electronic energy spectrum for the two-dimensional Fibonacci quasicrystals. It is found that the spectrum has a multifurcating structure which is very different from the monofurcating structure of one-dimensional Fibonacci quasicrystals. By using the four-fold symmetry of the Fibonacci quasilattice under study, we have reduced the Hamiltonian and then performed a numerical simulation, the results of which are consistent with the analytical ones.</p> <br/>Acta Physica Sinica. 1991 40(10): 1666-1676. Published 1991-05-05 ELECTRONIC SPECTRUM OF TWO-DIMENSIONAL FIBONACCI QUASICRYSTALS FU XIU-JUN, CHENG BO-LIN, ZHENG DA-FANG, LIU YOU-YAN 1991-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(10): 1666-1676. article doi:10.7498/aps.40.1666 10.7498/aps.40.1666 Acta Physica Sinica 40 10 1991-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1666 1666-1676 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1677 Author(s): HUANG XU-GUANG, WANG HE-ZHOU, SHE WE-LONG, LI QING-XING, YU ZHEN-XIN, JIN BO, PENG SHAO-QI <br/><p>The initial dynamics of photogenerated carriers in a-Si:H/a-SiNx:H multilayers has been investigated with time-resolved laser spectroscopy. The mechanisms of thermalization and recombination of these carriers are analysed. The results also reveal that the decay time cutoff, the mobility edge and the band-tail width vary non-monotonously with respect to nitrogen content with a turning point near x = 0.85, which may result from the changes of the internal electric field and the structure of multilayer with nitrogen content.</p> <br/>Acta Physica Sinica. 1991 40(10): 1677-1682. Published 1991-05-05 Author(s): HUANG XU-GUANG, WANG HE-ZHOU, SHE WE-LONG, LI QING-XING, YU ZHEN-XIN, JIN BO, PENG SHAO-QI <br/><p>The initial dynamics of photogenerated carriers in a-Si:H/a-SiNx:H multilayers has been investigated with time-resolved laser spectroscopy. The mechanisms of thermalization and recombination of these carriers are analysed. The results also reveal that the decay time cutoff, the mobility edge and the band-tail width vary non-monotonously with respect to nitrogen content with a turning point near x = 0.85, which may result from the changes of the internal electric field and the structure of multilayer with nitrogen content.</p> <br/>Acta Physica Sinica. 1991 40(10): 1677-1682. Published 1991-05-05 PICOSECOND PHOTOLUMINESCENCE IN a-Si:H/a-SiNx:H MULTILAYERS HUANG XU-GUANG, WANG HE-ZHOU, SHE WE-LONG, LI QING-XING, YU ZHEN-XIN, JIN BO, PENG SHAO-QI 1991-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(10): 1677-1682. article doi:10.7498/aps.40.1677 10.7498/aps.40.1677 Acta Physica Sinica 40 10 1991-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1677 1677-1682 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1683 Author(s): WANG REN-ZHI, HUANG MEI-CHUN <br/><p>Basing on the density functional theory and LMTO-ASA band method, we study the properties of an average hybridization energy Ez of sp3 hydrid orbital, near the interface in semiconductor superlattice. It is shown that the Ez can be considered as a reference energy level for calculating the valence-band offsets △Ev at heterojunctions. The results indicate that the theo-retical values of the △Ev obtained with this method for several hererojunctions are in agreement with other theoretical and experimental results.</p> <br/>Acta Physica Sinica. 1991 40(10): 1683-1688. Published 1991-05-05 Author(s): WANG REN-ZHI, HUANG MEI-CHUN <br/><p>Basing on the density functional theory and LMTO-ASA band method, we study the properties of an average hybridization energy Ez of sp3 hydrid orbital, near the interface in semiconductor superlattice. It is shown that the Ez can be considered as a reference energy level for calculating the valence-band offsets △Ev at heterojunctions. The results indicate that the theo-retical values of the △Ev obtained with this method for several hererojunctions are in agreement with other theoretical and experimental results.</p> <br/>Acta Physica Sinica. 1991 40(10): 1683-1688. Published 1991-05-05 A THEORETICAL CALCULATION OF VALENCE-BAND OFFSETS AT HETEROJUNCTIONS WANG REN-ZHI, HUANG MEI-CHUN 1991-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(10): 1683-1688. article doi:10.7498/aps.40.1683 10.7498/aps.40.1683 Acta Physica Sinica 40 10 1991-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1683 1683-1688 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1689 Author(s): WANG XIAO-HUI, JIN XIN, YAO XI-XIAN <br/><p>In the presence of large thermal fluctuation, conditions that RF-SQUID in the dissipa-tive mode can be properly operated are analysed, the flux transition distribution densities are obtained, thus the mean value and the width of transition are derived. Finally we find that the-effective critical current of RF-SQUID loop is greatly reduced by large fluctuation and the transition width can be determined with a simple equation.</p> <br/>Acta Physica Sinica. 1991 40(10): 1689-1693. Published 1991-05-05 Author(s): WANG XIAO-HUI, JIN XIN, YAO XI-XIAN <br/><p>In the presence of large thermal fluctuation, conditions that RF-SQUID in the dissipa-tive mode can be properly operated are analysed, the flux transition distribution densities are obtained, thus the mean value and the width of transition are derived. Finally we find that the-effective critical current of RF-SQUID loop is greatly reduced by large fluctuation and the transition width can be determined with a simple equation.</p> <br/>Acta Physica Sinica. 1991 40(10): 1689-1693. Published 1991-05-05 FLUX TRANSITION PROPERTIES OF RF-SQUID IN THE DIS-SIPATIVE MODE IN THE PRESENCE OF LARGE FLUCTUATION WANG XIAO-HUI, JIN XIN, YAO XI-XIAN 1991-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(10): 1689-1693. article doi:10.7498/aps.40.1689 10.7498/aps.40.1689 Acta Physica Sinica 40 10 1991-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1689 1689-1693 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1694 Author(s): WEI CHONG-DE, LIU ZUN-XIAO, LAN JIAN, SUN YUN-XI, GAN ZI-ZHAO, REN HONG-TAO, XIAO LINO, HE QING <br/><p>The magnetization curves of YBCO crystal prepared by melt-textured growth method were measured from 1.5K to 89K. Flux jumps were observed for H‖ c at 1.5K, 7K and 10K. Peak effects were observed for H‖ c in the temperature range of 15-83K. The anisotropies of magnetization curves and magnetic critical current are analysed in detail. The properties of connection between grains and the pinning mechanism are discussed.</p> <br/>Acta Physica Sinica. 1991 40(10): 1694-1702. Published 1991-05-05 Author(s): WEI CHONG-DE, LIU ZUN-XIAO, LAN JIAN, SUN YUN-XI, GAN ZI-ZHAO, REN HONG-TAO, XIAO LINO, HE QING <br/><p>The magnetization curves of YBCO crystal prepared by melt-textured growth method were measured from 1.5K to 89K. Flux jumps were observed for H‖ c at 1.5K, 7K and 10K. Peak effects were observed for H‖ c in the temperature range of 15-83K. The anisotropies of magnetization curves and magnetic critical current are analysed in detail. The properties of connection between grains and the pinning mechanism are discussed.</p> <br/>Acta Physica Sinica. 1991 40(10): 1694-1702. Published 1991-05-05 MAGNETIC PROPERTIES OF A YBCO CRYSTAL PREPARED BY MELT-TEXTURED GROWTH METHOD WEI CHONG-DE, LIU ZUN-XIAO, LAN JIAN, SUN YUN-XI, GAN ZI-ZHAO, REN HONG-TAO, XIAO LINO, HE QING 1991-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(10): 1694-1702. article doi:10.7498/aps.40.1694 10.7498/aps.40.1694 Acta Physica Sinica 40 10 1991-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1694 1694-1702 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1703 Author(s): A. D. BOARDMAN, BAO JIA-SHAN, WANG QI, CAI YING-SHI, S. A. NIKITOV <br/><p>The wave equation for nonlinear magnctostatic surface waves (MSSW) on ferromagnetic film is derived with perturbation theory under the condition of transverse magnetisation, and its solution is found. The nonlinear dispersion relation shows that a high wave power results in a reduction of frequency band of MSSW. The variations of group velocity dispersion and nonlinear frequency shift with the wave frequency and film thickness are also studied. The results show that the bright pulse envelope solitons can not exist in our case.</p> <br/>Acta Physica Sinica. 1991 40(10): 1703-1711. Published 1991-05-05 Author(s): A. D. BOARDMAN, BAO JIA-SHAN, WANG QI, CAI YING-SHI, S. A. NIKITOV <br/><p>The wave equation for nonlinear magnctostatic surface waves (MSSW) on ferromagnetic film is derived with perturbation theory under the condition of transverse magnetisation, and its solution is found. The nonlinear dispersion relation shows that a high wave power results in a reduction of frequency band of MSSW. The variations of group velocity dispersion and nonlinear frequency shift with the wave frequency and film thickness are also studied. The results show that the bright pulse envelope solitons can not exist in our case.</p> <br/>Acta Physica Sinica. 1991 40(10): 1703-1711. Published 1991-05-05 PROPAGATION OF NONLINEAR MAGNETOSTATIC SURFACE WAVES ON FERROMAGNETIC FILM A. D. BOARDMAN, BAO JIA-SHAN, WANG QI, CAI YING-SHI, S. A. NIKITOV 1991-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(10): 1703-1711. article doi:10.7498/aps.40.1703 10.7498/aps.40.1703 Acta Physica Sinica 40 10 1991-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1703 1703-1711 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1712 Author(s): ZHANG SHENG-LIANG, ZHAI HONG-RU <br/><p>The coercive force, Hc and magnetostriction, λs, have been measured for nonequilibrium Fe1-xPdx alloys, with increasing x, Hc decreases but λs, increases. The decrease of Hc may be related to the decrease in the average anisotropy due to the reduction of crystal grain size. After annealing above 600K, Hc increases rapidly because of the precipitation of the ordered FePd phase.</p> <br/>Acta Physica Sinica. 1991 40(10): 1712-1716. Published 1991-05-05 Author(s): ZHANG SHENG-LIANG, ZHAI HONG-RU <br/><p>The coercive force, Hc and magnetostriction, λs, have been measured for nonequilibrium Fe1-xPdx alloys, with increasing x, Hc decreases but λs, increases. The decrease of Hc may be related to the decrease in the average anisotropy due to the reduction of crystal grain size. After annealing above 600K, Hc increases rapidly because of the precipitation of the ordered FePd phase.</p> <br/>Acta Physica Sinica. 1991 40(10): 1712-1716. Published 1991-05-05 COERCIVE FORCE AND MAGNETOSTRICTION OF NONEQUILIBRIUM Fe-Pd ALLOYS ZHANG SHENG-LIANG, ZHAI HONG-RU 1991-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(10): 1712-1716. article doi:10.7498/aps.40.1712 10.7498/aps.40.1712 Acta Physica Sinica 40 10 1991-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1712 1712-1716 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1717 Author(s): LI GENG-YING, WU XUE-WEN <br/><p>A Z echo NMR pulse sequence is proposed for using in measurement of pure dipole or quadrupole spectrum. The Z echo NMR powder lineshape is not only independent of chemical shielding anisotropy but also, under strong radio-frequency field condition, independent of rf field inhomogeneity. This method is superior obviously to nutation NMR technique. The conclusions were analyzed theoretically and confirmed by experimental results.</p> <br/>Acta Physica Sinica. 1991 40(10): 1717-1722. Published 1991-05-05 Author(s): LI GENG-YING, WU XUE-WEN <br/><p>A Z echo NMR pulse sequence is proposed for using in measurement of pure dipole or quadrupole spectrum. The Z echo NMR powder lineshape is not only independent of chemical shielding anisotropy but also, under strong radio-frequency field condition, independent of rf field inhomogeneity. This method is superior obviously to nutation NMR technique. The conclusions were analyzed theoretically and confirmed by experimental results.</p> <br/>Acta Physica Sinica. 1991 40(10): 1717-1722. Published 1991-05-05 Z ECHO NMR POWDER SPECTRUM OF THREE-LEVEL SYSTEMS LI GENG-YING, WU XUE-WEN 1991-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(10): 1717-1722. article doi:10.7498/aps.40.1717 10.7498/aps.40.1717 Acta Physica Sinica 40 10 1991-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1717 1717-1722 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1723 Author(s): WANG ZHEN-XIA, ZHANG JI-PING, PAN JI-SHENG, TAO ZHEN-LAN, ZHANG HUI-MING, ZHANG WEI-PING, LU ZHAO-LUN <br/><p>The effect of dopant boron in bulk nickel on sputtering yield has been investigated by the Rutherford backscattering spectroscopy technique. It was shown that a decrease in sputter-ing yield with respect to pure nickel target can be described qualitatively by Painter and Ave-rill's model, but the decrease in our experiment appeared larger than that estimated by P-A model. The obvious effect of textured surface upon the reduction of sputtering of B-doped Ni target has been shown. It is conjectured that this reduction of net sputtering yield is very probably the result of a surface topography-binding energy combined effect.</p> <br/>Acta Physica Sinica. 1991 40(10): 1723-1728. Published 1991-05-05 Author(s): WANG ZHEN-XIA, ZHANG JI-PING, PAN JI-SHENG, TAO ZHEN-LAN, ZHANG HUI-MING, ZHANG WEI-PING, LU ZHAO-LUN <br/><p>The effect of dopant boron in bulk nickel on sputtering yield has been investigated by the Rutherford backscattering spectroscopy technique. It was shown that a decrease in sputter-ing yield with respect to pure nickel target can be described qualitatively by Painter and Ave-rill's model, but the decrease in our experiment appeared larger than that estimated by P-A model. The obvious effect of textured surface upon the reduction of sputtering of B-doped Ni target has been shown. It is conjectured that this reduction of net sputtering yield is very probably the result of a surface topography-binding energy combined effect.</p> <br/>Acta Physica Sinica. 1991 40(10): 1723-1728. Published 1991-05-05 EFFECT OF ADDITION OF BORON ON SPUTTERING YIELD OF NICKEL WANG ZHEN-XIA, ZHANG JI-PING, PAN JI-SHENG, TAO ZHEN-LAN, ZHANG HUI-MING, ZHANG WEI-PING, LU ZHAO-LUN 1991-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(10): 1723-1728. article doi:10.7498/aps.40.1723 10.7498/aps.40.1723 Acta Physica Sinica 40 10 1991-05-05 //m.getgobooth.com/en/article/doi/10.7498/aps.40.1723 1723-1728