//www.getgobooth.com/ 必威体育下载 daily 15 2024-08-20 10:33:37 apsoffice@iphy.ac.cn apsoffice@iphy.ac.cn 2024-08-20 10:33:37 zh Copyright ©Acta Physica Sinica All Rights Reserved. 京ICP备05002789号-1 Address: PostCode：100190 Phone: 010-82649829，82649241,82649863 Email: apsoffice@iphy.ac.cn Copyright ©Acta Physica Sinica All Rights Reserved apsoffice@iphy.ac.cn 1000-3290 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1601 Author(s): LI ZI-PING <br/><p>Starting from the quantization formalism of the phase-space path integral for a system with a singular Lagrangian, the generalized canonical Ward identities and conserved charges at quantum level are deduced under the global transformation in extended phase space. In general, the quantal conserved charges are different from classical ones. We give a preliminary application to Yang-Mills theory,the new quantal conserved charges are found.</p> <br/>Acta Physica Sinica. 1996 45(10): 1601-1608. Published 1996-05-05 Author(s): LI ZI-PING <br/><p>Starting from the quantization formalism of the phase-space path integral for a system with a singular Lagrangian, the generalized canonical Ward identities and conserved charges at quantum level are deduced under the global transformation in extended phase space. In general, the quantal conserved charges are different from classical ones. We give a preliminary application to Yang-Mills theory,the new quantal conserved charges are found.</p> <br/>Acta Physica Sinica. 1996 45(10): 1601-1608. Published 1996-05-05 GLOBAL QUANTAL CANONICAL SYMMETRY PROPERTIES FOR A SYSTEM WITH A SINGULAR LAGRANGIAN LI ZI-PING 1996-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1996 45(10): 1601-1608. article doi:10.7498/aps.45.1601 10.7498/aps.45.1601 Acta Physica Sinica 45 10 1996-05-05 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1601 1601-1608 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1609 Author(s): TAN MING-LIANG, ZHU ZHENG-HE, ZHAO YONG-KUN, CHEN XIAO-FENG <br/><p>The fine-structure energy levels and transition parameters of Cu-like Au50+ have been calculated by using the relativistic multi-configuration method(GRASP 2,1992) with the corrections of finite nuclear size, Breit and QED. The results obtained are in good agreement with the experimental data available and better than those of the previous calculations. It can be concluded that the QED correction should be taken into account further, which greatly improves the accuracy of the calculated 4s—4p transition wavelengths.</p> <br/>Acta Physica Sinica. 1996 45(10): 1609-1614. Published 1996-05-05 Author(s): TAN MING-LIANG, ZHU ZHENG-HE, ZHAO YONG-KUN, CHEN XIAO-FENG <br/><p>The fine-structure energy levels and transition parameters of Cu-like Au50+ have been calculated by using the relativistic multi-configuration method(GRASP 2,1992) with the corrections of finite nuclear size, Breit and QED. The results obtained are in good agreement with the experimental data available and better than those of the previous calculations. It can be concluded that the QED correction should be taken into account further, which greatly improves the accuracy of the calculated 4s—4p transition wavelengths.</p> <br/>Acta Physica Sinica. 1996 45(10): 1609-1614. Published 1996-05-05 RELATIVISTIC MULTICONFIGURATION CALCULATION OF FINE-STRUCTURE ENERGY LEVELS AND TRANSITIONS FOR Cu-LIKE Au50+ TAN MING-LIANG, ZHU ZHENG-HE, ZHAO YONG-KUN, CHEN XIAO-FENG 1996-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1996 45(10): 1609-1614. article doi:10.7498/aps.45.1609 10.7498/aps.45.1609 Acta Physica Sinica 45 10 1996-05-05 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1609 1609-1614 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1615 Author(s): WANG YAN, YUN FENG, LIAO XIAN-BO, KONG GUANG-LIN <br/><p>In this paper, we report the recent results about photovoltaic effects in a metal (Al or Au)/porous silicon(MPS)structure. We have given the spectral response curves of the Schottky diode structures of the first time, and investigated the dependences of the open circuit voltage on the incident light intensity and the measurement temperature. The results obtained show that the Schottky junction between the metal and the porous silicon layer should be the principal source of the photovoltaic actions, while the heterojunction between the porous silicon layer and the silicon substrate could impede the transport of the forward current in this structures. It is also found that the open circuit voltage increases linearly with decreasing of temperature in the range of 300—120K and the temperature coefficient is ～2.0mV/K and ～2.8mV/K for Au/PS and Al/PS diodes, respectively. </p> <br/>Acta Physica Sinica. 1996 45(10): 1615-1621. Published 1996-05-05 Author(s): WANG YAN, YUN FENG, LIAO XIAN-BO, KONG GUANG-LIN <br/><p>In this paper, we report the recent results about photovoltaic effects in a metal (Al or Au)/porous silicon(MPS)structure. We have given the spectral response curves of the Schottky diode structures of the first time, and investigated the dependences of the open circuit voltage on the incident light intensity and the measurement temperature. The results obtained show that the Schottky junction between the metal and the porous silicon layer should be the principal source of the photovoltaic actions, while the heterojunction between the porous silicon layer and the silicon substrate could impede the transport of the forward current in this structures. It is also found that the open circuit voltage increases linearly with decreasing of temperature in the range of 300—120K and the temperature coefficient is ～2.0mV/K and ～2.8mV/K for Au/PS and Al/PS diodes, respectively. </p> <br/>Acta Physica Sinica. 1996 45(10): 1615-1621. Published 1996-05-05 PHOTOVALTAIC EFFECT IN MPS STRUCTURE WANG YAN, YUN FENG, LIAO XIAN-BO, KONG GUANG-LIN 1996-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1996 45(10): 1615-1621. article doi:10.7498/aps.45.1615 10.7498/aps.45.1615 Acta Physica Sinica 45 10 1996-05-05 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1615 1615-1621 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1622 Author(s): GAN JIAN-HUA, CHEN XU-ZONG, LI YI-MIN, JI WANG-XI, HUA JING-SHAN, YAO JI-LIANG, YANG DONG-HAI, WANG YI-QIU <br/><p>The dependence of Cs saturated absorption spectra on the intensity of pumping light, especially that of the spectrum of ６２Ｓ１／２Ｆ＝４→６２Ｐ３／２Ｆ′＝５, was measured and calculated. When the pumping light and probing light were linearly polarized, the relative magnitudes of the resonance signals were calculated by solving a set of rate equations with Runge-Kutta algorithm, taking into consideration the optical pumping process and the saturation in the Zee-man sublevels of the hyperfine structure. The theoretical calculations were in good agreement with the experimental results.</p> <br/>Acta Physica Sinica. 1996 45(10): 1622-1628. Published 1996-05-05 Author(s): GAN JIAN-HUA, CHEN XU-ZONG, LI YI-MIN, JI WANG-XI, HUA JING-SHAN, YAO JI-LIANG, YANG DONG-HAI, WANG YI-QIU <br/><p>The dependence of Cs saturated absorption spectra on the intensity of pumping light, especially that of the spectrum of ６２Ｓ１／２Ｆ＝４→６２Ｐ３／２Ｆ′＝５, was measured and calculated. When the pumping light and probing light were linearly polarized, the relative magnitudes of the resonance signals were calculated by solving a set of rate equations with Runge-Kutta algorithm, taking into consideration the optical pumping process and the saturation in the Zee-man sublevels of the hyperfine structure. The theoretical calculations were in good agreement with the experimental results.</p> <br/>Acta Physica Sinica. 1996 45(10): 1622-1628. Published 1996-05-05 THE DEPENDENCE OF Cs SATURATED ABSORPTION SPECTRA ON THE INTENSITY OF PUMPING LIGHT GAN JIAN-HUA, CHEN XU-ZONG, LI YI-MIN, JI WANG-XI, HUA JING-SHAN, YAO JI-LIANG, YANG DONG-HAI, WANG YI-QIU 1996-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1996 45(10): 1622-1628. article doi:10.7498/aps.45.1622 10.7498/aps.45.1622 Acta Physica Sinica 45 10 1996-05-05 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1622 1622-1628 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1629 Author(s): DING SHI-LIANG, MA JIE, GUAN DA-REN <br/><p>This work deals with the multiphoton dissociation of diatomic molecule in intense IR laser field, the interaction between field and molecules is approximated to that between field and the dipoles. The Ｓｃｈｒ?ｄｉｎｇｅｒ equation is solved by using Close-Coupling method and Floquet theory. Numerical results for molecule HF are given.</p> <br/>Acta Physica Sinica. 1996 45(10): 1629-1635. Published 1996-05-05 Author(s): DING SHI-LIANG, MA JIE, GUAN DA-REN <br/><p>This work deals with the multiphoton dissociation of diatomic molecule in intense IR laser field, the interaction between field and molecules is approximated to that between field and the dipoles. The Ｓｃｈｒ?ｄｉｎｇｅｒ equation is solved by using Close-Coupling method and Floquet theory. Numerical results for molecule HF are given.</p> <br/>Acta Physica Sinica. 1996 45(10): 1629-1635. Published 1996-05-05 A DIATOMIC MOLECULE MULTIPHOTON DISSOCIATION IN INTENSE FIELDS DING SHI-LIANG, MA JIE, GUAN DA-REN 1996-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1996 45(10): 1629-1635. article doi:10.7498/aps.45.1629 10.7498/aps.45.1629 Acta Physica Sinica 45 10 1996-05-05 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1629 1629-1635 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1636 Author(s): WANG YOU-DE, YANG ZHI-HU, MA XIN-WEN, LIU HUI-PING, ZHAO MENG-CHUN, ZHOU SI-XIN, LIU ZHAN-WEN, ZHANG WEN, ZHANG XUE-ZHEN, GUO XIAO-HONG, PAN GUANG-YAN, YANG FENG, LI DA-WAN <br/><p>The emission cross sections and excitation cross sections have been measured in collisions between N4+ ion and Na atoms. The experimental results show that the excitation cross sections of NaI(3p-3s) are vety large, about １０-15ｃｍ2 . The data of cross sections have been given in this paper and reasons for the large excitation cross sections of NaI(3p-3s) have been discussed qualitatively.</p> <br/>Acta Physica Sinica. 1996 45(10): 1636-1640. Published 1996-05-05 Author(s): WANG YOU-DE, YANG ZHI-HU, MA XIN-WEN, LIU HUI-PING, ZHAO MENG-CHUN, ZHOU SI-XIN, LIU ZHAN-WEN, ZHANG WEN, ZHANG XUE-ZHEN, GUO XIAO-HONG, PAN GUANG-YAN, YANG FENG, LI DA-WAN <br/><p>The emission cross sections and excitation cross sections have been measured in collisions between N4+ ion and Na atoms. The experimental results show that the excitation cross sections of NaI(3p-3s) are vety large, about １０-15ｃｍ2 . The data of cross sections have been given in this paper and reasons for the large excitation cross sections of NaI(3p-3s) have been discussed qualitatively.</p> <br/>Acta Physica Sinica. 1996 45(10): 1636-1640. Published 1996-05-05 MEASUREMENT OF EXCITATION CROSS SECTIONS OF TARGET ATOM Na BY HIGHLY CHARGED ION N4+ IMPACT WANG YOU-DE, YANG ZHI-HU, MA XIN-WEN, LIU HUI-PING, ZHAO MENG-CHUN, ZHOU SI-XIN, LIU ZHAN-WEN, ZHANG WEN, ZHANG XUE-ZHEN, GUO XIAO-HONG, PAN GUANG-YAN, YANG FENG, LI DA-WAN 1996-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1996 45(10): 1636-1640. article doi:10.7498/aps.45.1636 10.7498/aps.45.1636 Acta Physica Sinica 45 10 1996-05-05 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1636 1636-1640 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1641 Author(s): FANG QUAN-YU, CAI WEI, SHEN ZHI-JUN, ZOU YU, LI PING, XU YUAN-GUANG <br/><p>The collision strengths of excitation by electron impact from nl to n′l′ with n(n′)≤7 of Li-like ions are computed systematically. The results agree with available data within 10%. The collision strengths are scaled and fitted with a least-squre spline method. As a result, the collision strengths and thermally averaged rate coefficients in the entire range can be determined by ten parameters for one transition process.</p> <br/>Acta Physica Sinica. 1996 45(10): 1641-1646. Published 1996-05-05 Author(s): FANG QUAN-YU, CAI WEI, SHEN ZHI-JUN, ZOU YU, LI PING, XU YUAN-GUANG <br/><p>The collision strengths of excitation by electron impact from nl to n′l′ with n(n′)≤7 of Li-like ions are computed systematically. The results agree with available data within 10%. The collision strengths are scaled and fitted with a least-squre spline method. As a result, the collision strengths and thermally averaged rate coefficients in the entire range can be determined by ten parameters for one transition process.</p> <br/>Acta Physica Sinica. 1996 45(10): 1641-1646. Published 1996-05-05 COLLISION STRENGTHS AND RATE COEFFICIENTS OF Li-LIKE IONS BY ELECTRON IMPACT FANG QUAN-YU, CAI WEI, SHEN ZHI-JUN, ZOU YU, LI PING, XU YUAN-GUANG 1996-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1996 45(10): 1641-1646. article doi:10.7498/aps.45.1641 10.7498/aps.45.1641 Acta Physica Sinica 45 10 1996-05-05 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1641 1641-1646 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1647 Author(s): ZHANG GUO-QING, GU BEN-YUAN, YANG GUO-ZHEN <br/><p>Based on the general theory of the optical transformation, a new method for designing diffractive phase elements generating multi-focal annuli is presented. The number and the position of focal annuli, as well as the width of focal annuli may be predetermined arbitrarily according to the particular demands. Several simulation designs are carried out for the Gaus-sian-profile laser illumination. We also investigate the influence of phase quantization on the results of designs. The simulation calculations show that the new method can be successfully applied to the designs of the desired diffractive phase elements for generating multi-focal annuli.</p> <br/>Acta Physica Sinica. 1996 45(10): 1647-1654. Published 1996-05-05 Author(s): ZHANG GUO-QING, GU BEN-YUAN, YANG GUO-ZHEN <br/><p>Based on the general theory of the optical transformation, a new method for designing diffractive phase elements generating multi-focal annuli is presented. The number and the position of focal annuli, as well as the width of focal annuli may be predetermined arbitrarily according to the particular demands. Several simulation designs are carried out for the Gaus-sian-profile laser illumination. We also investigate the influence of phase quantization on the results of designs. The simulation calculations show that the new method can be successfully applied to the designs of the desired diffractive phase elements for generating multi-focal annuli.</p> <br/>Acta Physica Sinica. 1996 45(10): 1647-1654. Published 1996-05-05 A NEW DESIGN METHOD OF DIFFRACTIVE PHASE ELEMENTS FOR GENERATING MULTI-FOCAL ANNULI ZHANG GUO-QING, GU BEN-YUAN, YANG GUO-ZHEN 1996-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1996 45(10): 1647-1654. article doi:10.7498/aps.45.1647 10.7498/aps.45.1647 Acta Physica Sinica 45 10 1996-05-05 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1647 1647-1654 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1655 Author(s): SHE WEI-LONG, YU ZHEN-XIN, LEI DE-MING <br/><p>The photorefractive holographic grating in a Mn doped K1-yNayBa2-xSrxNb5O15 (KNSBN) is written with two 0.27mW He-Ne laser beams (632.6nm) and is read with one quasicontinuous dye laser beam (621.8nm, 1.6mW or less). It is found that the Bragg diffracton suddenly reaches its maximum at the beginning and then decays to its minimum with a time constant of about 0.6s. The ratio of the maximum to the minimum can be higher than 7.5. A theory including pyroelectric effect has been developed and it fits the experiment well.</p> <br/>Acta Physica Sinica. 1996 45(10): 1655-1659. Published 1996-05-05 Author(s): SHE WEI-LONG, YU ZHEN-XIN, LEI DE-MING <br/><p>The photorefractive holographic grating in a Mn doped K1-yNayBa2-xSrxNb5O15 (KNSBN) is written with two 0.27mW He-Ne laser beams (632.6nm) and is read with one quasicontinuous dye laser beam (621.8nm, 1.6mW or less). It is found that the Bragg diffracton suddenly reaches its maximum at the beginning and then decays to its minimum with a time constant of about 0.6s. The ratio of the maximum to the minimum can be higher than 7.5. A theory including pyroelectric effect has been developed and it fits the experiment well.</p> <br/>Acta Physica Sinica. 1996 45(10): 1655-1659. Published 1996-05-05 PYROELECTRIC AFFECTION ON THE READOUT OF PHOTO-REFRACTIVE HOLOGRAPHIC GRATING SHE WEI-LONG, YU ZHEN-XIN, LEI DE-MING 1996-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1996 45(10): 1655-1659. article doi:10.7498/aps.45.1655 10.7498/aps.45.1655 Acta Physica Sinica 45 10 1996-05-05 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1655 1655-1659 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1660 Author(s): ZHUANG JUN, TAN WEI-HAN <br/><p>A theory of multimode oscillation in an optical unidirectional ring resonator with photorefractive gain was given in the weak-field limit. In nondegenerate state, the system is stable and can be described by Lotka-Voterra equation. While the system will becomes unstable in certain circumstance owing to the mode-mode interaction in the degenerate or quasi-degenerate condition, such as the periodic alternation behavior.</p> <br/>Acta Physica Sinica. 1996 45(10): 1660-1670. Published 1996-05-05 Author(s): ZHUANG JUN, TAN WEI-HAN <br/><p>A theory of multimode oscillation in an optical unidirectional ring resonator with photorefractive gain was given in the weak-field limit. In nondegenerate state, the system is stable and can be described by Lotka-Voterra equation. While the system will becomes unstable in certain circumstance owing to the mode-mode interaction in the degenerate or quasi-degenerate condition, such as the periodic alternation behavior.</p> <br/>Acta Physica Sinica. 1996 45(10): 1660-1670. Published 1996-05-05 MODE ITINERANCY IN A PHOTOREFRACTIVE RING OSCILLATOR ZHUANG JUN, TAN WEI-HAN 1996-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1996 45(10): 1660-1670. article doi:10.7498/aps.45.1660 10.7498/aps.45.1660 Acta Physica Sinica 45 10 1996-05-05 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1660 1660-1670 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1671 Author(s): LI CHUN-FEI, HONG TAO <br/><p>The phenomena of dark spatial optical soliton and soliton-induced flexible optical wave-guide have been observed, which are induced by thermal self-defocusing effect of Ar+ laser beam in C60-toluene solution. The numerical simulations of the formation process of dark spatial soliton using the nonlinear Schr?dinger equation are consistent with the experimental results.</p> <br/>Acta Physica Sinica. 1996 45(10): 1671-1676. Published 1996-05-05 Author(s): LI CHUN-FEI, HONG TAO <br/><p>The phenomena of dark spatial optical soliton and soliton-induced flexible optical wave-guide have been observed, which are induced by thermal self-defocusing effect of Ar+ laser beam in C60-toluene solution. The numerical simulations of the formation process of dark spatial soliton using the nonlinear Schr?dinger equation are consistent with the experimental results.</p> <br/>Acta Physica Sinica. 1996 45(10): 1671-1676. Published 1996-05-05 DARK SPATIAL OPTICAL SOLITON AND SOLITON-INDUCED ELEXIBLE WAVEGUIDE IN C60 SOLUTION LI CHUN-FEI, HONG TAO 1996-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1996 45(10): 1671-1676. article doi:10.7498/aps.45.1671 10.7498/aps.45.1671 Acta Physica Sinica 45 10 1996-05-05 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1671 1671-1676 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1677 Author(s): ZHANG JUN, PEI WEN-BING, GU PEI-JUN, SUI CHENG-ZHI, CHANG TIE-QIANG <br/><p>The self-modified quasi-stationary model for radiation ablation has been established in this paper based on physical picture of numerical simulations. The objective of the model is to predict quantitatively the scaling laws of various ablation parameters driven by soft-X-ray, such as the dependence of ablation depth, pressure on radiation temperature, energy, pulse width, without resorting to complex computer simulations. The computational results are given fot some interstng materials in ICF. Scaling laws obtained in this paper are simple and effective in target design and analysis of experimental results.</p> <br/>Acta Physica Sinica. 1996 45(10): 1677-1687. Published 1996-05-05 Author(s): ZHANG JUN, PEI WEN-BING, GU PEI-JUN, SUI CHENG-ZHI, CHANG TIE-QIANG <br/><p>The self-modified quasi-stationary model for radiation ablation has been established in this paper based on physical picture of numerical simulations. The objective of the model is to predict quantitatively the scaling laws of various ablation parameters driven by soft-X-ray, such as the dependence of ablation depth, pressure on radiation temperature, energy, pulse width, without resorting to complex computer simulations. The computational results are given fot some interstng materials in ICF. Scaling laws obtained in this paper are simple and effective in target design and analysis of experimental results.</p> <br/>Acta Physica Sinica. 1996 45(10): 1677-1687. Published 1996-05-05 SELF-MODIFIED QUASI-STATIONARY MODEL FOR THE RADIATION ABLATION ZHANG JUN, PEI WEN-BING, GU PEI-JUN, SUI CHENG-ZHI, CHANG TIE-QIANG 1996-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1996 45(10): 1677-1687. article doi:10.7498/aps.45.1677 10.7498/aps.45.1677 Acta Physica Sinica 45 10 1996-05-05 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1677 1677-1687 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1688 Author(s): MA HONG-LIANG, SUN KE-XU, YI RONG-QING, CUI YAN-LI, TANG DAO-YUAN, ZHENG ZHI-JIAN <br/><p>Soft X-ray conversion efficiencies from 0.35μｍ laser-irradiated Au disk and C, Al, Cu foils at different laser intensity on the "Xingguang Ⅱ" high-intensity laser facility (energy ５—９０Ｊ，focal spot～２００μｍ，FWHM４００—８００ｐｓ）were obtained. A simple model was given to explain soft X-ray conversion efficiency from ０.３５μｍ laser-Al plasma interaction. In this model,bccause of heat conduction from the laser-heated spot, the conversion was very small at some low irradiancc limit, while at some high irradiance limit it was bounded by the energy lost in plasma blowoff. Consequently, at laser intensity(2±0.5)×１０１4Ｗ／ｃｍ2,the X-ray conversion efficiency reaches a maximum.</p> <br/>Acta Physica Sinica. 1996 45(10): 1688-1693. Published 1996-05-05 Author(s): MA HONG-LIANG, SUN KE-XU, YI RONG-QING, CUI YAN-LI, TANG DAO-YUAN, ZHENG ZHI-JIAN <br/><p>Soft X-ray conversion efficiencies from 0.35μｍ laser-irradiated Au disk and C, Al, Cu foils at different laser intensity on the "Xingguang Ⅱ" high-intensity laser facility (energy ５—９０Ｊ，focal spot～２００μｍ，FWHM４００—８００ｐｓ）were obtained. A simple model was given to explain soft X-ray conversion efficiency from ０.３５μｍ laser-Al plasma interaction. In this model,bccause of heat conduction from the laser-heated spot, the conversion was very small at some low irradiancc limit, while at some high irradiance limit it was bounded by the energy lost in plasma blowoff. Consequently, at laser intensity(2±0.5)×１０１4Ｗ／ｃｍ2,the X-ray conversion efficiency reaches a maximum.</p> <br/>Acta Physica Sinica. 1996 45(10): 1688-1693. Published 1996-05-05 STUDY OF SOFT X-RAY CONVERSION EFFICIENCY FROM FREQUENCY-TRIPLED 0.35μｍ LASER-IRRADIATED DIFFERENT MATERIAL PLANAR TARGETS MA HONG-LIANG, SUN KE-XU, YI RONG-QING, CUI YAN-LI, TANG DAO-YUAN, ZHENG ZHI-JIAN 1996-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1996 45(10): 1688-1693. article doi:10.7498/aps.45.1688 10.7498/aps.45.1688 Acta Physica Sinica 45 10 1996-05-05 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1688 1688-1693 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1694 Author(s): DONG LI-FANG, WANG LONG, LI ZAN-LIANG <br/><p>The electron density fluctuations of CT-6B Tokamak plasma have been studied in detail through the observation of Hα emission intensity by multichannel optical diagnostics. Their various behavior, such as power spectrum, fluctuation level and correlation,have been measured. The experimental results show that some characteristics of density fluctuations are founded in CT-6B Tokamak plasma: the density fluctuation level is about 10%-90% in the radial range r=4-10cm; the point in the range draws, nearer to the edge of plasma the level lecomes higher. A broadband power spectrum is observed at observed points along the plasma radius. There exists a local correlation structure with short correlation time, about 0.2-0.5ms, and short correlation distance , about 0.5-1cm,in the edge of plasma.</p> <br/>Acta Physica Sinica. 1996 45(10): 1694-1703. Published 1996-05-05 Author(s): DONG LI-FANG, WANG LONG, LI ZAN-LIANG <br/><p>The electron density fluctuations of CT-6B Tokamak plasma have been studied in detail through the observation of Hα emission intensity by multichannel optical diagnostics. Their various behavior, such as power spectrum, fluctuation level and correlation,have been measured. The experimental results show that some characteristics of density fluctuations are founded in CT-6B Tokamak plasma: the density fluctuation level is about 10%-90% in the radial range r=4-10cm; the point in the range draws, nearer to the edge of plasma the level lecomes higher. A broadband power spectrum is observed at observed points along the plasma radius. There exists a local correlation structure with short correlation time, about 0.2-0.5ms, and short correlation distance , about 0.5-1cm,in the edge of plasma.</p> <br/>Acta Physica Sinica. 1996 45(10): 1694-1703. Published 1996-05-05 MEASUREMENT OF DENSITY FLUCTUATIONS OF CT-6B TOKAMAK PLASMA DONG LI-FANG, WANG LONG, LI ZAN-LIANG 1996-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1996 45(10): 1694-1703. article doi:10.7498/aps.45.1694 10.7498/aps.45.1694 Acta Physica Sinica 45 10 1996-05-05 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1694 1694-1703 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1704 Author(s): ZHOU SHENG-MING, ZHAO ZONG-YAN, QI ZE-MING, XU ZHANG-CHENG, TOMOE FUKAMACHI, RIICHIROU NEGISHI, MASAMI YOSHIZAWA, TETSUO KANAJIMA <br/><p>The diffracted and transmitted rocking curves for GaAs(600) in the symmetric Bragg case have been measured under the condition of extremely anomalous scattering near the Ga K-absorption edge, and then compared with the corresponding results calculated in the dynamic theory of X-ray diffraction. We have thereof pointed out that the transmitted rocking curves near the atomic absorption edge in Bragg case are useful in the study of anomalous scattering.</p> <br/>Acta Physica Sinica. 1996 45(10): 1704-1708. Published 1996-05-05 Author(s): ZHOU SHENG-MING, ZHAO ZONG-YAN, QI ZE-MING, XU ZHANG-CHENG, TOMOE FUKAMACHI, RIICHIROU NEGISHI, MASAMI YOSHIZAWA, TETSUO KANAJIMA <br/><p>The diffracted and transmitted rocking curves for GaAs(600) in the symmetric Bragg case have been measured under the condition of extremely anomalous scattering near the Ga K-absorption edge, and then compared with the corresponding results calculated in the dynamic theory of X-ray diffraction. We have thereof pointed out that the transmitted rocking curves near the atomic absorption edge in Bragg case are useful in the study of anomalous scattering.</p> <br/>Acta Physica Sinica. 1996 45(10): 1704-1708. Published 1996-05-05 THE OBSERVATIONS OF DIFFRACTED AND TRANSMITTED ROCKING CURVES IN BRAGG CASE NEAR ABSORPTION EDGE ZHOU SHENG-MING, ZHAO ZONG-YAN, QI ZE-MING, XU ZHANG-CHENG, TOMOE FUKAMACHI, RIICHIROU NEGISHI, MASAMI YOSHIZAWA, TETSUO KANAJIMA 1996-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1996 45(10): 1704-1708. article doi:10.7498/aps.45.1704 10.7498/aps.45.1704 Acta Physica Sinica 45 10 1996-05-05 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1704 1704-1708 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1709 Author(s): WANG YU-TIAN, ZHUANG YAN, JIANG DE-SHENG, YANG XIAO-PING, JIANG XIAO-MING, WU JIA-YANG, XIU LI-SONG, ZHENG WEN-LI <br/><p>A AlAs/GaAs/AlAs/AlGaAs double-barrier superlattice grown on GaAs substrate by MBE has been studied by combining double-crystal X-ray diffraction and synchrotron radiation. This combination provides a comprehensive structural analysis. During simulated by X-ray dynamical diffraction theory, we find the intensity of satellite peaks which situated near-by the modulated wave point of one layer are very sensitive to the variation of the layer's structural parameters. Accoding to these, the accurate layer thickness can be get with an error less than 0.1nm. The modulated phenomenon is investigated by X-ray kinematical diffraction theory.</p> <br/>Acta Physica Sinica. 1996 45(10): 1709-1716. Published 1996-05-05 Author(s): WANG YU-TIAN, ZHUANG YAN, JIANG DE-SHENG, YANG XIAO-PING, JIANG XIAO-MING, WU JIA-YANG, XIU LI-SONG, ZHENG WEN-LI <br/><p>A AlAs/GaAs/AlAs/AlGaAs double-barrier superlattice grown on GaAs substrate by MBE has been studied by combining double-crystal X-ray diffraction and synchrotron radiation. This combination provides a comprehensive structural analysis. During simulated by X-ray dynamical diffraction theory, we find the intensity of satellite peaks which situated near-by the modulated wave point of one layer are very sensitive to the variation of the layer's structural parameters. Accoding to these, the accurate layer thickness can be get with an error less than 0.1nm. The modulated phenomenon is investigated by X-ray kinematical diffraction theory.</p> <br/>Acta Physica Sinica. 1996 45(10): 1709-1716. Published 1996-05-05 STUDY OF DOUBLE-BARRIER SUPERLATTICE BY SYNCHROTRON RADIATION AND DOUBLE-CRYSTAL X-RAY DIFFRACTION WANG YU-TIAN, ZHUANG YAN, JIANG DE-SHENG, YANG XIAO-PING, JIANG XIAO-MING, WU JIA-YANG, XIU LI-SONG, ZHENG WEN-LI 1996-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1996 45(10): 1709-1716. article doi:10.7498/aps.45.1709 10.7498/aps.45.1709 Acta Physica Sinica 45 10 1996-05-05 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1709 1709-1716 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1717 Author(s): WANG LIAN-TAO, WU CHANG-QIN <br/><p>Electron-phonon interactions and phonon excitations are studied on the models both for the halogen-bridged moxed-valence transition-metal linear complexes(MX) and the molecular crystals (MC). The renormalized phonon dispersions are obtained under the adiabatic approximation. We find:(1) the electron-phonon interactions are different for the two models, and then the renormalization correction on the acoustic phonons is negligible for the MX model whereas the correction is obvious for the MC model;(2) no gap exists between the two branchs of phonons for the two models, which is different with that of the Su-Schrieffer-Heeger model for polymers.</p> <br/>Acta Physica Sinica. 1996 45(10): 1717-1723. Published 1996-05-05 Author(s): WANG LIAN-TAO, WU CHANG-QIN <br/><p>Electron-phonon interactions and phonon excitations are studied on the models both for the halogen-bridged moxed-valence transition-metal linear complexes(MX) and the molecular crystals (MC). The renormalized phonon dispersions are obtained under the adiabatic approximation. We find:(1) the electron-phonon interactions are different for the two models, and then the renormalization correction on the acoustic phonons is negligible for the MX model whereas the correction is obvious for the MC model;(2) no gap exists between the two branchs of phonons for the two models, which is different with that of the Su-Schrieffer-Heeger model for polymers.</p> <br/>Acta Physica Sinica. 1996 45(10): 1717-1723. Published 1996-05-05 ELECTRON-PHONON INTERACTIONS AND PHONON EXCITATIONS IN ONE-DIMENSIONAL SYSTEMS WANG LIAN-TAO, WU CHANG-QIN 1996-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1996 45(10): 1717-1723. article doi:10.7498/aps.45.1717 10.7498/aps.45.1717 Acta Physica Sinica 45 10 1996-05-05 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1717 1717-1723 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1724 Author(s): ZHANG MING, YU WEN, ZHANG JUN, ZHANG YUAN-YI, WNAG WEN-KUI <br/><p>The amorphous Nb/Si multilayers were prepared for the interdiffusion study. The temperature dependent effective interdiffusion at low temperature in amorphous Nb/Si multilayer was obtained using in-situ XRD technique. The smaller pre-exponential factor for diffusion coefficient in amorphous Nb/Si multilayer is explained by the trap-retarded diffusion mechanism. In this model, the atomic vibration frequency v is substituted by the average characteristic atomic vibration frequency v because of the presence of defect traps.</p> <br/>Acta Physica Sinica. 1996 45(10): 1724-1728. Published 1996-05-05 Author(s): ZHANG MING, YU WEN, ZHANG JUN, ZHANG YUAN-YI, WNAG WEN-KUI <br/><p>The amorphous Nb/Si multilayers were prepared for the interdiffusion study. The temperature dependent effective interdiffusion at low temperature in amorphous Nb/Si multilayer was obtained using in-situ XRD technique. The smaller pre-exponential factor for diffusion coefficient in amorphous Nb/Si multilayer is explained by the trap-retarded diffusion mechanism. In this model, the atomic vibration frequency v is substituted by the average characteristic atomic vibration frequency v because of the presence of defect traps.</p> <br/>Acta Physica Sinica. 1996 45(10): 1724-1728. Published 1996-05-05 STUDY THE INTERDIFFUSION IN AMORPHOUS Nb/Si MULTILAYER ZHANG MING, YU WEN, ZHANG JUN, ZHANG YUAN-YI, WNAG WEN-KUI 1996-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1996 45(10): 1724-1728. article doi:10.7498/aps.45.1724 10.7498/aps.45.1724 Acta Physica Sinica 45 10 1996-05-05 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1724 1724-1728 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1729 Author(s): SUN LI, CHEN YAN-FENG, YU TAO, MING NAI-BEN, JIANG XIAO-MING, XIU LI-SONG <br/><p>ＰｂＴｉＯ３ thin films were deposited on (001) redoping n-Si, (001) SrＴｉＯ３ substrates by low-pressure MOCVD technique, XRD θ－２θ scan shows that the film on Si substrate has a polycrystalline structure, while the other two films have preferential orientations and their epitaxial nature was confirmed by the X-ray φ scan, rocking curves of the two epitaxial thin films were taken at BSRF using the synchrotron radiation. The film on LaAlＯ３ substrate has an a,c domain coexisting structure, and the film on ＳｒＴｉＯ３ substrate only has a c-orientation. All the films exhibit a c-axis shortening compare with the bulk material, and the reason can be attributed to the size effect and surface influence. The ferroelectric properties of the polycrystalline thin films were investigated using the redoping Si substrate as bottom electrode directly, and the ＰｂＴｉＯ３ thin film shows a perfect hysteresis loop.</p> <br/>Acta Physica Sinica. 1996 45(10): 1729-1736. Published 1996-05-05 Author(s): SUN LI, CHEN YAN-FENG, YU TAO, MING NAI-BEN, JIANG XIAO-MING, XIU LI-SONG <br/><p>ＰｂＴｉＯ３ thin films were deposited on (001) redoping n-Si, (001) SrＴｉＯ３ substrates by low-pressure MOCVD technique, XRD θ－２θ scan shows that the film on Si substrate has a polycrystalline structure, while the other two films have preferential orientations and their epitaxial nature was confirmed by the X-ray φ scan, rocking curves of the two epitaxial thin films were taken at BSRF using the synchrotron radiation. The film on LaAlＯ３ substrate has an a,c domain coexisting structure, and the film on ＳｒＴｉＯ３ substrate only has a c-orientation. All the films exhibit a c-axis shortening compare with the bulk material, and the reason can be attributed to the size effect and surface influence. The ferroelectric properties of the polycrystalline thin films were investigated using the redoping Si substrate as bottom electrode directly, and the ＰｂＴｉＯ３ thin film shows a perfect hysteresis loop.</p> <br/>Acta Physica Sinica. 1996 45(10): 1729-1736. Published 1996-05-05 PREPARATION AND CHARACTERIZATION OF ＰｂＴｉＯ３ THIN FILMS BY METALORGANIC CHEMICAL VAPOR DEPOSITION SUN LI, CHEN YAN-FENG, YU TAO, MING NAI-BEN, JIANG XIAO-MING, XIU LI-SONG 1996-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1996 45(10): 1729-1736. article doi:10.7498/aps.45.1729 10.7498/aps.45.1729 Acta Physica Sinica 45 10 1996-05-05 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1729 1729-1736 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1737 Author(s): SHEN YAO-WEN, ZHANG ZHI-PENG, CHEN LONG-HAI, HUANG MEI-CHUN <br/><p>Electronic structure for BKB has been calculated by using LMTO-ASA-Supercell method based on the X-ray absorption fine structure (XAFS) spectroscopy measurements. Measurements show that Bi posseses two valence states Ｂｉ３＋ and Ｂｉ5＋ and their Bi—Ｏ bond lengths are diffferent, the difference decreases with the increase of K concentration. Calculations are performed on five samples namely Ｂａ4Ｂｉ4Ｏ12（４０４），（Ｂａ３Ｋ）Ｂｉ4Ｏ12（３１４），（ＢａＫ）Ｂｉ2Ｏ6（１１２），（ＢａＫ３）Ｂｉ4Ｏ12（１３４），Ｋ2Ｂｉ2Ｏ6（０２２）.Results from the calculations show that （404）and (314)are semiconductors with gaps of 1.6eV and 1.5eV, respectively. Other samples are metals. Total energy analysis shows that (314) is not stable, so that the extreme value of x is 0.5. The BKB electronic structures at x=0.1 to 0.5 are calculated by combining the probability with sample's Bernoull's distribution. Superconducting transition temperature Tc of BKB is suddenly changed when x approximates to 0.25. The experimental data are close to the prediction values of percolation theory.</p> <br/>Acta Physica Sinica. 1996 45(10): 1737-1743. Published 1996-05-05 Author(s): SHEN YAO-WEN, ZHANG ZHI-PENG, CHEN LONG-HAI, HUANG MEI-CHUN <br/><p>Electronic structure for BKB has been calculated by using LMTO-ASA-Supercell method based on the X-ray absorption fine structure (XAFS) spectroscopy measurements. Measurements show that Bi posseses two valence states Ｂｉ３＋ and Ｂｉ5＋ and their Bi—Ｏ bond lengths are diffferent, the difference decreases with the increase of K concentration. Calculations are performed on five samples namely Ｂａ4Ｂｉ4Ｏ12（４０４），（Ｂａ３Ｋ）Ｂｉ4Ｏ12（３１４），（ＢａＫ）Ｂｉ2Ｏ6（１１２），（ＢａＫ３）Ｂｉ4Ｏ12（１３４），Ｋ2Ｂｉ2Ｏ6（０２２）.Results from the calculations show that （404）and (314)are semiconductors with gaps of 1.6eV and 1.5eV, respectively. Other samples are metals. Total energy analysis shows that (314) is not stable, so that the extreme value of x is 0.5. The BKB electronic structures at x=0.1 to 0.5 are calculated by combining the probability with sample's Bernoull's distribution. Superconducting transition temperature Tc of BKB is suddenly changed when x approximates to 0.25. The experimental data are close to the prediction values of percolation theory.</p> <br/>Acta Physica Sinica. 1996 45(10): 1737-1743. Published 1996-05-05 THE ELECTRONIC STRUCTURE AND SUPERCONDUCTIVITY FOR （Ｂａ1-xＫx）ＢｉＯ３ SHEN YAO-WEN, ZHANG ZHI-PENG, CHEN LONG-HAI, HUANG MEI-CHUN 1996-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1996 45(10): 1737-1743. article doi:10.7498/aps.45.1737 10.7498/aps.45.1737 Acta Physica Sinica 45 10 1996-05-05 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1737 1737-1743 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1744 Author(s): HU YONG-JIAN, PENG CHU-BING, FANG RUI-YI, LI WEI-JUN, DAI DAO-SHENG <br/><p>[Fe/Cr],[Fe/Cr/Si] and [Fe/Si] multilayered systems were prepared by the vacuum evaporating method. The effects of the altered space thicknesses of the nonmagnetic Cr,Si and Cr+Si layers on the exchange coupling and the magneto resistance of those multilayers were studied. The Fe layers were fixed on 2.0nm. The oscillation of the interlayer coupling and the giant magnetoresistance (GMR) and its oscillation with the change of the Cr layer thickness were observed. The GMR was 14.6% at 4.2K. Three was no oscillatory effect of the exchange coupling and GMR in the [Fe/Si] and [Fe/Cr/Si] multilayers was found. According to the increases of the resistivity of the samples doped with Si layers, we believe the conducting electrons in the nonmagnetic layers should decrease largely. This would be the cause to reduce the polarization effect of those electrons in the space layers. Then the oscillatory exchange coupling disappeared and the magnetoresistance was much reduced.</p> <br/>Acta Physica Sinica. 1996 45(10): 1744-1748. Published 1996-05-05 Author(s): HU YONG-JIAN, PENG CHU-BING, FANG RUI-YI, LI WEI-JUN, DAI DAO-SHENG <br/><p>[Fe/Cr],[Fe/Cr/Si] and [Fe/Si] multilayered systems were prepared by the vacuum evaporating method. The effects of the altered space thicknesses of the nonmagnetic Cr,Si and Cr+Si layers on the exchange coupling and the magneto resistance of those multilayers were studied. The Fe layers were fixed on 2.0nm. The oscillation of the interlayer coupling and the giant magnetoresistance (GMR) and its oscillation with the change of the Cr layer thickness were observed. The GMR was 14.6% at 4.2K. Three was no oscillatory effect of the exchange coupling and GMR in the [Fe/Si] and [Fe/Cr/Si] multilayers was found. According to the increases of the resistivity of the samples doped with Si layers, we believe the conducting electrons in the nonmagnetic layers should decrease largely. This would be the cause to reduce the polarization effect of those electrons in the space layers. Then the oscillatory exchange coupling disappeared and the magnetoresistance was much reduced.</p> <br/>Acta Physica Sinica. 1996 45(10): 1744-1748. Published 1996-05-05 INTERLAYER COUPLING AND MAGNETORESISTANT EFFECT IN THE [Fe/Cr] MULTILAYERS DOPED WITH Si LAYERS HU YONG-JIAN, PENG CHU-BING, FANG RUI-YI, LI WEI-JUN, DAI DAO-SHENG 1996-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1996 45(10): 1744-1748. article doi:10.7498/aps.45.1744 10.7498/aps.45.1744 Acta Physica Sinica 45 10 1996-05-05 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1744 1744-1748 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1749 Author(s): SHAO YUAN-ZHI, XIONG ZHENG-YE, ZHANG JIE-LI, ZHANG JIN-XIU <br/><p>Investigations on magnetocaloric effect and magnetic entropy,Curie temperature and specific heat of nanometer binary gadolinium alloys such as Gd-Y,Gd-Tb and Gd-Zn have been carried out under the conditions of a low magnetic-field intensity(1T) and a temperature range within 233～313K. Both Curie temperature and specific heat of the prepared nanometer alloys,compared with the bulk materials,show obvious decrease and increase respectively. The nanometer alloy Gd-Y demonstrates an enhanced magnetocaloric effect and magnetic entropy over the same bulk material, which is of importance on researching and developing new materials for magnetic refrigeration. Adiscussion concerning the influence of nanometer structure on magnetic and heat properties mentioned above is given in detail.</p> <br/>Acta Physica Sinica. 1996 45(10): 1749-1755. Published 1996-05-05 Author(s): SHAO YUAN-ZHI, XIONG ZHENG-YE, ZHANG JIE-LI, ZHANG JIN-XIU <br/><p>Investigations on magnetocaloric effect and magnetic entropy,Curie temperature and specific heat of nanometer binary gadolinium alloys such as Gd-Y,Gd-Tb and Gd-Zn have been carried out under the conditions of a low magnetic-field intensity(1T) and a temperature range within 233～313K. Both Curie temperature and specific heat of the prepared nanometer alloys,compared with the bulk materials,show obvious decrease and increase respectively. The nanometer alloy Gd-Y demonstrates an enhanced magnetocaloric effect and magnetic entropy over the same bulk material, which is of importance on researching and developing new materials for magnetic refrigeration. Adiscussion concerning the influence of nanometer structure on magnetic and heat properties mentioned above is given in detail.</p> <br/>Acta Physica Sinica. 1996 45(10): 1749-1755. Published 1996-05-05 CHARACTERISTICS IN MAGNETOCALORIC EFFECT AND MAGNETIC ENTROPY OF NANOMETER BINARY GADOLINIUM ALLOYS SHAO YUAN-ZHI, XIONG ZHENG-YE, ZHANG JIE-LI, ZHANG JIN-XIU 1996-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1996 45(10): 1749-1755. article doi:10.7498/aps.45.1749 10.7498/aps.45.1749 Acta Physica Sinica 45 10 1996-05-05 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1749 1749-1755 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1756 Author(s): YUE LAN-PING, HE YI-ZHEN <br/><p>Raman scattering of Ge nanocrystallites from 4 to 16nm is size, embedded in ＳｉＯ２ thin films has been studied. The Ge-ＳｉＯ２ samples were prepared by ion-beam sputtering and a post-annealing technique. A red shift and broadening of the Raman peak observed with decreasing the size of Ge particles are in good agreement with the calculated results based on the phonon confinement theory. Effects of the surface and interface of the Ge-nanocrystallites on Raman spectra have also been investigated. </p> <br/>Acta Physica Sinica. 1996 45(10): 1756-1761. Published 1996-05-05 Author(s): YUE LAN-PING, HE YI-ZHEN <br/><p>Raman scattering of Ge nanocrystallites from 4 to 16nm is size, embedded in ＳｉＯ２ thin films has been studied. The Ge-ＳｉＯ２ samples were prepared by ion-beam sputtering and a post-annealing technique. A red shift and broadening of the Raman peak observed with decreasing the size of Ge particles are in good agreement with the calculated results based on the phonon confinement theory. Effects of the surface and interface of the Ge-nanocrystallites on Raman spectra have also been investigated. </p> <br/>Acta Physica Sinica. 1996 45(10): 1756-1761. Published 1996-05-05 A STUDY OF THE RAMAN SCATTERING OF Ge NANOCRYSTALLITES EMBEDDED IN ＳｉＯ２ THIN FILMS YUE LAN-PING, HE YI-ZHEN 1996-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1996 45(10): 1756-1761. article doi:10.7498/aps.45.1756 10.7498/aps.45.1756 Acta Physica Sinica 45 10 1996-05-05 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1756 1756-1761 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1762 Author(s): XU ZHI-ZHONG <br/><p>The electronic structures and intersubband absorption coefficients of Ge0.3Si0.7/Si/Ge0.3Si0.7 quantum wells with barrier-δ-doping grown on Ge0.3Si0.7(001) substrates are consistently calculated in the envelopefunction approach. The dependences of the absorptivities on the well widths, δ-doping position and δ-doping concentration are discussed . At last, the frequency shift caused by the depolarization effects of highly dense two-dimensional electrons are studied.</p> <br/>Acta Physica Sinica. 1996 45(10): 1762-1770. Published 1996-05-05 Author(s): XU ZHI-ZHONG <br/><p>The electronic structures and intersubband absorption coefficients of Ge0.3Si0.7/Si/Ge0.3Si0.7 quantum wells with barrier-δ-doping grown on Ge0.3Si0.7(001) substrates are consistently calculated in the envelopefunction approach. The dependences of the absorptivities on the well widths, δ-doping position and δ-doping concentration are discussed . At last, the frequency shift caused by the depolarization effects of highly dense two-dimensional electrons are studied.</p> <br/>Acta Physica Sinica. 1996 45(10): 1762-1770. Published 1996-05-05 INTERSUBBAND ABSORPTION COEFFICIENTS IN A QUANTUM WELL Ge0.3Si0.7/Si/Ge0.3Si0.7 WITH BARRIER-δ-DOPING XU ZHI-ZHONG 1996-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1996 45(10): 1762-1770. article doi:10.7498/aps.45.1762 10.7498/aps.45.1762 Acta Physica Sinica 45 10 1996-05-05 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1762 1762-1770 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1771 Author(s): LIAO KE-JUN, WANG WAN-LU, ZHANG ZHEN-GANG, WU BIN <br/><p>The properties of boron-doped diamond films prepared by hot filament CVD were studied with Raman spectra and X-ray microanalysis. It was found that the content of the graphitic type （Ｓｐ2)bonding in the CVD diamond was reduced at low boron concentrations, and the widening and shift of the characteristic diamond Ｓｐ3 Raman peak appeared in the diamond with increasing boron concentrations. This can be interpreted in terms of the lattice strain and Fano interaction caused by boron doping.</p> <br/>Acta Physica Sinica. 1996 45(10): 1771-1776. Published 1996-05-05 Author(s): LIAO KE-JUN, WANG WAN-LU, ZHANG ZHEN-GANG, WU BIN <br/><p>The properties of boron-doped diamond films prepared by hot filament CVD were studied with Raman spectra and X-ray microanalysis. It was found that the content of the graphitic type （Ｓｐ2)bonding in the CVD diamond was reduced at low boron concentrations, and the widening and shift of the characteristic diamond Ｓｐ3 Raman peak appeared in the diamond with increasing boron concentrations. This can be interpreted in terms of the lattice strain and Fano interaction caused by boron doping.</p> <br/>Acta Physica Sinica. 1996 45(10): 1771-1776. Published 1996-05-05 STUDY OF BORON-DOPED DIAMOND FILMS BY HOT FILAMENT CVD LIAO KE-JUN, WANG WAN-LU, ZHANG ZHEN-GANG, WU BIN 1996-05-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1996 45(10): 1771-1776. article doi:10.7498/aps.45.1771 10.7498/aps.45.1771 Acta Physica Sinica 45 10 1996-05-05 //www.getgobooth.com/en/article/doi/10.7498/aps.45.1771 1771-1776

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