//m.getgobooth.com/ 必威体育下载 daily 15 2024-09-05 15:36:21 apsoffice@iphy.ac.cn apsoffice@iphy.ac.cn 2024-09-05 15:36:21 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.42.170 Author(s): <br/><p></p> <br/>Acta Physica Sinica. 1993 42(2): 170-172. Published 1993-01-05 Author(s): <br/><p></p> <br/>Acta Physica Sinica. 1993 42(2): 170-172. Published 1993-01-05 1993-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(2): 170-172. article doi:10.7498/aps.42.170 10.7498/aps.42.170 Acta Physica Sinica 42 2 1993-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.42.170 170-172 //m.getgobooth.com/en/article/doi/10.7498/aps.42.173 Author(s): ZHOU GUANG-HUI <br/><p>Using a transformation of hyperbolic function, the Schr?dinger equation with reflection-less potential well is transformed into an associated-Legendre equation. Then both bound and scattering state eigenfunctions are expressed in terms of associated-Legendre polynomials and functions respectively. The exact solutions obtained in this paper are more general and systematic than some asymptotic solutions or solutions of reflectionless potential with special parameters in literatures. The normalization of the scattering state is discussed in detail.</p> <br/>Acta Physica Sinica. 1993 42(2): 173-179. Published 1993-01-05 Author(s): ZHOU GUANG-HUI <br/><p>Using a transformation of hyperbolic function, the Schr?dinger equation with reflection-less potential well is transformed into an associated-Legendre equation. Then both bound and scattering state eigenfunctions are expressed in terms of associated-Legendre polynomials and functions respectively. The exact solutions obtained in this paper are more general and systematic than some asymptotic solutions or solutions of reflectionless potential with special parameters in literatures. The normalization of the scattering state is discussed in detail.</p> <br/>Acta Physica Sinica. 1993 42(2): 173-179. Published 1993-01-05 EXACT SOLUTION OF SCHR?DINGER EQUATION WITH REFLECTIONLESS POTENTIAL WELL ZHOU GUANG-HUI 1993-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(2): 173-179. article doi:10.7498/aps.42.173 10.7498/aps.42.173 Acta Physica Sinica 42 2 1993-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.42.173 173-179 //m.getgobooth.com/en/article/doi/10.7498/aps.42.180 Author(s): HUANG XIANG-YOU, LIU QUAN-HUI, TIAN XU, QIU ZHONG-PING <br/><p>Double wave quantum theory is applied to describe the motion of charged particle in a uniform magnetic field. This description of the motion of the particle is complete. One can tell the value of an arbitrary physical quantity at any time. The probability and the formula to calculate mean values in ordinary quantum mechanics comes from the average of double wave description over a certain ensemble. The rule of gauge transformation in quantum mechanics can be seen from the average over an ensemble.</p> <br/>Acta Physica Sinica. 1993 42(2): 180-187. Published 1993-01-05 Author(s): HUANG XIANG-YOU, LIU QUAN-HUI, TIAN XU, QIU ZHONG-PING <br/><p>Double wave quantum theory is applied to describe the motion of charged particle in a uniform magnetic field. This description of the motion of the particle is complete. One can tell the value of an arbitrary physical quantity at any time. The probability and the formula to calculate mean values in ordinary quantum mechanics comes from the average of double wave description over a certain ensemble. The rule of gauge transformation in quantum mechanics can be seen from the average over an ensemble.</p> <br/>Acta Physica Sinica. 1993 42(2): 180-187. Published 1993-01-05 DOUBLE WAVE DESCRIPTION OF THE MOTION OF A CHARGED PARTICLE IN A UNIFORM MAGNETIC FIELD HUANG XIANG-YOU, LIU QUAN-HUI, TIAN XU, QIU ZHONG-PING 1993-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(2): 180-187. article doi:10.7498/aps.42.180 10.7498/aps.42.180 Acta Physica Sinica 42 2 1993-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.42.180 180-187 //m.getgobooth.com/en/article/doi/10.7498/aps.42.188 Author(s): LI JIAN-ZENG <br/><p>A nonstatic solution of plane-symmetric metric generated by a special scalar field V = V(t-z) has been obtained. The global properties, such as its symmetries, singularities, are also investigated.</p> <br/>Acta Physica Sinica. 1993 42(2): 188-192. Published 1993-01-05 Author(s): LI JIAN-ZENG <br/><p>A nonstatic solution of plane-symmetric metric generated by a special scalar field V = V(t-z) has been obtained. The global properties, such as its symmetries, singularities, are also investigated.</p> <br/>Acta Physica Sinica. 1993 42(2): 188-192. Published 1993-01-05 A NONSTATIC PLANE-SYMMETRIC SOLUTION OF EINSTEIN EQUATIONS WITH A SPECIAL SCALAR FIELD LI JIAN-ZENG 1993-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(2): 188-192. article doi:10.7498/aps.42.188 10.7498/aps.42.188 Acta Physica Sinica 42 2 1993-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.42.188 188-192 //m.getgobooth.com/en/article/doi/10.7498/aps.42.193 Author(s): LI CHENG-YAO <br/><p>In this paper, it is proved that if both general displacement of coordinates and the Lie derivative of vierbeins are treated as symmetric transformation, then it is impossible to obtain the called general covariant energy-momentum conservation laws in Einstein-Cartan theory byNoether theorem.</p> <br/>Acta Physica Sinica. 1993 42(2): 193-197. Published 1993-01-05 Author(s): LI CHENG-YAO <br/><p>In this paper, it is proved that if both general displacement of coordinates and the Lie derivative of vierbeins are treated as symmetric transformation, then it is impossible to obtain the called general covariant energy-momentum conservation laws in Einstein-Cartan theory byNoether theorem.</p> <br/>Acta Physica Sinica. 1993 42(2): 193-197. Published 1993-01-05 A COMMENT ON "GENERAL CONSERVATION LAWS IN EINSTEIN-CARTAN THEORY" LI CHENG-YAO 1993-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(2): 193-197. article doi:10.7498/aps.42.193 10.7498/aps.42.193 Acta Physica Sinica 42 2 1993-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.42.193 193-197 //m.getgobooth.com/en/article/doi/10.7498/aps.42.198 Author(s): HUANG CHAO-GUANG <br/><p>The renormalised stress-energy tensor of a conformal invariant scalar field in the Boul-ware stale in Reissner-Nordstr?m sapace-time is calculated by using the Page-Zannias method and with the help of a personal computer and REDUCE language. The tensor vanishes inthe asymptotically flat region and is not regular at the event horizon.</p> <br/>Acta Physica Sinica. 1993 42(2): 198-204. Published 1993-01-05 Author(s): HUANG CHAO-GUANG <br/><p>The renormalised stress-energy tensor of a conformal invariant scalar field in the Boul-ware stale in Reissner-Nordstr?m sapace-time is calculated by using the Page-Zannias method and with the help of a personal computer and REDUCE language. The tensor vanishes inthe asymptotically flat region and is not regular at the event horizon.</p> <br/>Acta Physica Sinica. 1993 42(2): 198-204. Published 1993-01-05 RENORMALISED STRESS-ENERGY TENSOR OF CONFORMAL SCALAR FIELD IN BOULWARE STATE IN REISSNER-NORDSTR?M SPACE-TIME HUANG CHAO-GUANG 1993-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(2): 198-204. article doi:10.7498/aps.42.198 10.7498/aps.42.198 Acta Physica Sinica 42 2 1993-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.42.198 198-204 //m.getgobooth.com/en/article/doi/10.7498/aps.42.205 Author(s): ZENG WEN-SHENG, ZHANG GUANG-YING <br/><p>The relation among the lattice vibrations, carriers and high-Tc superconductivity is discussed in detail. We propose that there are strong local coupling between carriers and rhe lattice vibrations rather than the screen effect between them. Basing on the experimental results and the theoretical analysis, we found that the relation between superconductivity and the strength of the local coupling and its overall effect.</p> <br/>Acta Physica Sinica. 1993 42(2): 205-213. Published 1993-01-05 Author(s): ZENG WEN-SHENG, ZHANG GUANG-YING <br/><p>The relation among the lattice vibrations, carriers and high-Tc superconductivity is discussed in detail. We propose that there are strong local coupling between carriers and rhe lattice vibrations rather than the screen effect between them. Basing on the experimental results and the theoretical analysis, we found that the relation between superconductivity and the strength of the local coupling and its overall effect.</p> <br/>Acta Physica Sinica. 1993 42(2): 205-213. Published 1993-01-05 RELATION AMONG THE LATTICE VIBRATIONS, CARRIERS AND HIGH-Tc SUPERCONDUCTIVITY ZENG WEN-SHENG, ZHANG GUANG-YING 1993-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(2): 205-213. article doi:10.7498/aps.42.205 10.7498/aps.42.205 Acta Physica Sinica 42 2 1993-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.42.205 205-213 //m.getgobooth.com/en/article/doi/10.7498/aps.42.214 Author(s): YU YANG-ZHENG, CHEN XIONG-XIONG <br/><p>We construct a wider class of O(N) supersymmetric (SUSY) models with so-perpotential W = (l/n)gφn in two-dimensions. The witten index △ of the models is evaluated in detail. It is shown that SUSY breaking does not occur when n is even, and can occur when n is odd. By using large-N expansion, a mechanism for spontaneous SUSY breaking is investigated. Finally, we present the particle spectra.</p> <br/>Acta Physica Sinica. 1993 42(2): 214-222. Published 1993-01-05 Author(s): YU YANG-ZHENG, CHEN XIONG-XIONG <br/><p>We construct a wider class of O(N) supersymmetric (SUSY) models with so-perpotential W = (l/n)gφn in two-dimensions. The witten index △ of the models is evaluated in detail. It is shown that SUSY breaking does not occur when n is even, and can occur when n is odd. By using large-N expansion, a mechanism for spontaneous SUSY breaking is investigated. Finally, we present the particle spectra.</p> <br/>Acta Physica Sinica. 1993 42(2): 214-222. Published 1993-01-05 BREAKING OF SUPERSYMMETRY AND WITTEN INDEX IN TWO-DIMENSIONAL SUPERSYMMETRIC MODELS YU YANG-ZHENG, CHEN XIONG-XIONG 1993-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(2): 214-222. article doi:10.7498/aps.42.214 10.7498/aps.42.214 Acta Physica Sinica 42 2 1993-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.42.214 214-222 //m.getgobooth.com/en/article/doi/10.7498/aps.42.223 Author(s): GOU BING-CONG <br/><p>The radiative and Auger rates are calculated for doubly excited intersh-ell states of Ar16+. We adopt the conventional infiguration interraction CI app-roach, bul each state is labelled using the n(K,T)NA2s+1Lπ designation. lt is shown that, to intrashell states which all have A = +1, these states decay prima-rily by auger process and radiative decay contributed significantly only for the hi-ghest states within a given manifoid, but to intershell states the Auger widths are much smaller tor A =-1 and A = 0 states. For these states the flourescence yield may become non-negligible. The approximate selection rule v=- 0,±1 for radiative decay holds for these states as well.</p> <br/>Acta Physica Sinica. 1993 42(2): 223-230. Published 1993-01-05 Author(s): GOU BING-CONG <br/><p>The radiative and Auger rates are calculated for doubly excited intersh-ell states of Ar16+. We adopt the conventional infiguration interraction CI app-roach, bul each state is labelled using the n(K,T)NA2s+1Lπ designation. lt is shown that, to intrashell states which all have A = +1, these states decay prima-rily by auger process and radiative decay contributed significantly only for the hi-ghest states within a given manifoid, but to intershell states the Auger widths are much smaller tor A =-1 and A = 0 states. For these states the flourescence yield may become non-negligible. The approximate selection rule v=- 0,±1 for radiative decay holds for these states as well.</p> <br/>Acta Physica Sinica. 1993 42(2): 223-230. Published 1993-01-05 RADIATIVE AND AUGER RATES OF HIGH DOUBLY EXCITED INTERSHELL STATES GOU BING-CONG 1993-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(2): 223-230. article doi:10.7498/aps.42.223 10.7498/aps.42.223 Acta Physica Sinica 42 2 1993-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.42.223 223-230 //m.getgobooth.com/en/article/doi/10.7498/aps.42.231 Author(s): LI JING, XU YUN-FEI, WANG YUN-XIAN, ZHANG SEN <br/><p>We have obtained Rydberg atom of different |ml| value by two-step excitation using polarized lasers. The field-ionization thresholds for 5snd (n= 22-27), | ml| =0,1,2 Rydberg states of Sr atom is measured by using a pulse electric field (up to 2.4kV/cm). Second-order approximate formula of field-ionization threshold that depend on the |ml| value is obtained and compared with the measured data.</p> <br/>Acta Physica Sinica. 1993 42(2): 231-236. Published 1993-01-05 Author(s): LI JING, XU YUN-FEI, WANG YUN-XIAN, ZHANG SEN <br/><p>We have obtained Rydberg atom of different |ml| value by two-step excitation using polarized lasers. The field-ionization thresholds for 5snd (n= 22-27), | ml| =0,1,2 Rydberg states of Sr atom is measured by using a pulse electric field (up to 2.4kV/cm). Second-order approximate formula of field-ionization threshold that depend on the |ml| value is obtained and compared with the measured data.</p> <br/>Acta Physica Sinica. 1993 42(2): 231-236. Published 1993-01-05 DEPENDENCE OF FIELD-IONIZATION THRESHOLD ON |ml| FOR RYDBERG STATES OF Sr ATOM LI JING, XU YUN-FEI, WANG YUN-XIAN, ZHANG SEN 1993-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(2): 231-236. article doi:10.7498/aps.42.231 10.7498/aps.42.231 Acta Physica Sinica 42 2 1993-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.42.231 231-236 //m.getgobooth.com/en/article/doi/10.7498/aps.42.237 Author(s): CHEN BAO-ZHEN <br/><p>In the framework of Keldysh-Faisal-Reiss (KFR) theory, with taking the coupling bet-ween the atomic potential and the applied light fields into account, the original KFR theory is improved and a new expression of photoionization probability of atoms is obtained.From this new expression, photoelectron spectra of H-atom ATI by strong linear-polarized laser in the short-pulse regime are got. This calulated photoelectron spectra are rather similar to the experimental ones. A new explanation of the experimental spectra is given.</p> <br/>Acta Physica Sinica. 1993 42(2): 237-243. Published 1993-01-05 Author(s): CHEN BAO-ZHEN <br/><p>In the framework of Keldysh-Faisal-Reiss (KFR) theory, with taking the coupling bet-ween the atomic potential and the applied light fields into account, the original KFR theory is improved and a new expression of photoionization probability of atoms is obtained.From this new expression, photoelectron spectra of H-atom ATI by strong linear-polarized laser in the short-pulse regime are got. This calulated photoelectron spectra are rather similar to the experimental ones. A new explanation of the experimental spectra is given.</p> <br/>Acta Physica Sinica. 1993 42(2): 237-243. Published 1993-01-05 IMPROVED KELDYSH-FAISAL-REISS THEORY CHEN BAO-ZHEN 1993-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(2): 237-243. article doi:10.7498/aps.42.237 10.7498/aps.42.237 Acta Physica Sinica 42 2 1993-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.42.237 237-243 //m.getgobooth.com/en/article/doi/10.7498/aps.42.244 Author(s): GONG XIN-GAO, ZHENG QING-QI <br/><p>The ab-initio molecular dynamics method and simulated annealing technique have been used to study the structural properties of small gallium clusters. We have found a transition from planar to nonplanar structure at n=5. Ga, molecule and zig-zag chain are building blocks of gallium clusters.</p> <br/>Acta Physica Sinica. 1993 42(2): 244-251. Published 1993-01-05 Author(s): GONG XIN-GAO, ZHENG QING-QI <br/><p>The ab-initio molecular dynamics method and simulated annealing technique have been used to study the structural properties of small gallium clusters. We have found a transition from planar to nonplanar structure at n=5. Ga, molecule and zig-zag chain are building blocks of gallium clusters.</p> <br/>Acta Physica Sinica. 1993 42(2): 244-251. Published 1993-01-05 AB-IN1T1O MOLECULAR DYNAMICS STUDIES ON GALLIUM CLUSTERS GONG XIN-GAO, ZHENG QING-QI 1993-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(2): 244-251. article doi:10.7498/aps.42.244 10.7498/aps.42.244 Acta Physica Sinica 42 2 1993-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.42.244 244-251 //m.getgobooth.com/en/article/doi/10.7498/aps.42.252 Author(s): LUO ZHEN-FEI, XU ZHI-ZHAN <br/><p>The conditions for realizing lasing without inversion are investigated via density matrix method in bare and dressed states in the V-type closed lifetime-broadened system where atomic coherence is induced by an external electromagnetic field. It is shown that a proper choice of pumping rate may lead to the realization of lasing without inversion.</p> <br/>Acta Physica Sinica. 1993 42(2): 252-255. Published 1993-01-05 Author(s): LUO ZHEN-FEI, XU ZHI-ZHAN <br/><p>The conditions for realizing lasing without inversion are investigated via density matrix method in bare and dressed states in the V-type closed lifetime-broadened system where atomic coherence is induced by an external electromagnetic field. It is shown that a proper choice of pumping rate may lead to the realization of lasing without inversion.</p> <br/>Acta Physica Sinica. 1993 42(2): 252-255. Published 1993-01-05 EXTERNAL-FIELD-INDUCED COHERENCE AND LASING WITHOUT INVERSION: THE V-TYPE SYSTEM LUO ZHEN-FEI, XU ZHI-ZHAN 1993-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(2): 252-255. article doi:10.7498/aps.42.252 10.7498/aps.42.252 Acta Physica Sinica 42 2 1993-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.42.252 252-255 //m.getgobooth.com/en/article/doi/10.7498/aps.42.256 Author(s): WANG KAI-GE <br/><p>The dynamical behavior of laser Ginzburg-Landau equation, which describes the sponta-neously spacial temporal symmetry breaking, has been investigated, In the case of inhomoge-neous stationary solution, it shows the cooperative frequency locking; and in the case of spa-tial-temporal oscillatory solution, all the transverse modes have a common optical carrier fre-quency. However, a chaotic solution can be generated at lower pumping, due to the diffraction of electro-magnetic field and nonlinearity. The numerical results show that, in the situation of small detuning, the reduced phase diffusion equation of this model can more precisely du-plicate its global dynamical behavior. It illustrates that the phase pattern of field guides the dy-namics in spontaneous formation of the transverse pattern of field.</p> <br/>Acta Physica Sinica. 1993 42(2): 256-263. Published 1993-01-05 Author(s): WANG KAI-GE <br/><p>The dynamical behavior of laser Ginzburg-Landau equation, which describes the sponta-neously spacial temporal symmetry breaking, has been investigated, In the case of inhomoge-neous stationary solution, it shows the cooperative frequency locking; and in the case of spa-tial-temporal oscillatory solution, all the transverse modes have a common optical carrier fre-quency. However, a chaotic solution can be generated at lower pumping, due to the diffraction of electro-magnetic field and nonlinearity. The numerical results show that, in the situation of small detuning, the reduced phase diffusion equation of this model can more precisely du-plicate its global dynamical behavior. It illustrates that the phase pattern of field guides the dy-namics in spontaneous formation of the transverse pattern of field.</p> <br/>Acta Physica Sinica. 1993 42(2): 256-263. Published 1993-01-05 LASER GINZBURG-LANDAU EQUATION AND ITS PHASE DIFFUSION EQUATION WANG KAI-GE 1993-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(2): 256-263. article doi:10.7498/aps.42.256 10.7498/aps.42.256 Acta Physica Sinica 42 2 1993-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.42.256 256-263 //m.getgobooth.com/en/article/doi/10.7498/aps.42.264 Author(s): SHE WEI-LONG, LI QING-XING, YU ZHEN-XIN, GAO ZHAO-LAN, MO DANG, ZHU DE-RUI <br/><p>The phase conjugation of picosecond optical pulses is observed and recorded directly by using a streak camera. The signals are achieved by holographic phase conjugate technique. A theory is presented which fits the experimental data well.</p> <br/>Acta Physica Sinica. 1993 42(2): 264-272. Published 1993-01-05 Author(s): SHE WEI-LONG, LI QING-XING, YU ZHEN-XIN, GAO ZHAO-LAN, MO DANG, ZHU DE-RUI <br/><p>The phase conjugation of picosecond optical pulses is observed and recorded directly by using a streak camera. The signals are achieved by holographic phase conjugate technique. A theory is presented which fits the experimental data well.</p> <br/>Acta Physica Sinica. 1993 42(2): 264-272. Published 1993-01-05 DIRECT OBSERVATION AND RECORD OF THE PHASE CONJUGATION OF PICOSECOND OPTICAL PULSES SHE WEI-LONG, LI QING-XING, YU ZHEN-XIN, GAO ZHAO-LAN, MO DANG, ZHU DE-RUI 1993-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(2): 264-272. article doi:10.7498/aps.42.264 10.7498/aps.42.264 Acta Physica Sinica 42 2 1993-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.42.264 264-272 //m.getgobooth.com/en/article/doi/10.7498/aps.42.273 Author(s): LU PEI-XIANG, ZHANG ZHENG-QUAN, XU ZHI-ZHAN, FAN PIN-ZHONG, SHEN BAI-FEI, CHEN SHI-SHENG <br/><p>Through analysizing the spatial distribution characteristics of the linewidth of Li-like si-licon ions X-ray lasers, we show that Stark broadening is the main line broadening me-chanism for Li-like Si11+ ions recombine X-ray laser. Spatial distribution of the electron den-sity of gain medium obtained by Stark brcadening shows that the electron density in the gain region is about 1019/cm3, and the lasing linewidth and electron density are 0.21? and 2.9 × l019/cm3 at the gain maximum respectively.</p> <br/>Acta Physica Sinica. 1993 42(2): 273-276. Published 1993-01-05 Author(s): LU PEI-XIANG, ZHANG ZHENG-QUAN, XU ZHI-ZHAN, FAN PIN-ZHONG, SHEN BAI-FEI, CHEN SHI-SHENG <br/><p>Through analysizing the spatial distribution characteristics of the linewidth of Li-like si-licon ions X-ray lasers, we show that Stark broadening is the main line broadening me-chanism for Li-like Si11+ ions recombine X-ray laser. Spatial distribution of the electron den-sity of gain medium obtained by Stark brcadening shows that the electron density in the gain region is about 1019/cm3, and the lasing linewidth and electron density are 0.21? and 2.9 × l019/cm3 at the gain maximum respectively.</p> <br/>Acta Physica Sinica. 1993 42(2): 273-276. Published 1993-01-05 SPATIAL DISTRIBUTIONS OF X-RAY LASING LINEWIDTH AND ELECTRON DENSITY IN A Li-LIKE SILICON PLASMA LU PEI-XIANG, ZHANG ZHENG-QUAN, XU ZHI-ZHAN, FAN PIN-ZHONG, SHEN BAI-FEI, CHEN SHI-SHENG 1993-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(2): 273-276. article doi:10.7498/aps.42.273 10.7498/aps.42.273 Acta Physica Sinica 42 2 1993-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.42.273 273-276 //m.getgobooth.com/en/article/doi/10.7498/aps.42.277 Author(s): ZHU SHI-XUE, WANG YUAN-MING, WANG SHAO-QING, YAN DE-QIN, JIN ZHI-XIONG <br/><p>This paper gives a new dynamical convergence criterion (RSMSD) in the real space multi-slice (RSMS) method, which imposes a practical restriction in choosing dynamically the expan-sion order for the propagator between each pair of slices by using a structure-dependent trun-cation condition, so as to avoid the intrinsic computational divergence problem of the original RSMS method. The validity of the RSMSD method for dynamical diffraction calculation in HREM has been rigorously examined. It has been found that, when the dynamical criterion is satisfied, the RSMSD method gives results in good agreement with those obtained by using fast Fourier transform multi-slice (FFTMS) method but avoiding the computing divergence which can arise in the RSMS method.</p> <br/>Acta Physica Sinica. 1993 42(2): 277-282. Published 1993-01-05 Author(s): ZHU SHI-XUE, WANG YUAN-MING, WANG SHAO-QING, YAN DE-QIN, JIN ZHI-XIONG <br/><p>This paper gives a new dynamical convergence criterion (RSMSD) in the real space multi-slice (RSMS) method, which imposes a practical restriction in choosing dynamically the expan-sion order for the propagator between each pair of slices by using a structure-dependent trun-cation condition, so as to avoid the intrinsic computational divergence problem of the original RSMS method. The validity of the RSMSD method for dynamical diffraction calculation in HREM has been rigorously examined. It has been found that, when the dynamical criterion is satisfied, the RSMSD method gives results in good agreement with those obtained by using fast Fourier transform multi-slice (FFTMS) method but avoiding the computing divergence which can arise in the RSMS method.</p> <br/>Acta Physica Sinica. 1993 42(2): 277-282. Published 1993-01-05 A DYNAMICAL CONVERGENCE CRITERION FOR THE REAL-SPACE MULTI-SLICE IMAGE SIMULATION METHOD ZHU SHI-XUE, WANG YUAN-MING, WANG SHAO-QING, YAN DE-QIN, JIN ZHI-XIONG 1993-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(2): 277-282. article doi:10.7498/aps.42.277 10.7498/aps.42.277 Acta Physica Sinica 42 2 1993-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.42.277 277-282 //m.getgobooth.com/en/article/doi/10.7498/aps.42.283 Author(s): CHEN KUI-YING, LI QING-CHUN, CHEN XI-CHEN <br/><p>On the basis of the embedded atom model reflecting many body interactions among atoms and the effective pair potential, structures and microdynamic behavior of liquid transition me-tal Pd and Pt have been investigated by means of molecular dynamics simulation with compu-ter. Pair distribution function, mean square displacement, self-diffusion coefficients and nor-malization velocity self-correlation function have been calculated, and the influence of many body interactions on these physical quantities have been discussed. Results show that the inf-luence of many body interactions on the pair distribution function is small, but this influence on mean square displacement, self-diffusive coeffcients and normalization wlocity self-correla-tion function is cons derable.</p> <br/>Acta Physica Sinica. 1993 42(2): 283-289. Published 1993-01-05 Author(s): CHEN KUI-YING, LI QING-CHUN, CHEN XI-CHEN <br/><p>On the basis of the embedded atom model reflecting many body interactions among atoms and the effective pair potential, structures and microdynamic behavior of liquid transition me-tal Pd and Pt have been investigated by means of molecular dynamics simulation with compu-ter. Pair distribution function, mean square displacement, self-diffusion coefficients and nor-malization velocity self-correlation function have been calculated, and the influence of many body interactions on these physical quantities have been discussed. Results show that the inf-luence of many body interactions on the pair distribution function is small, but this influence on mean square displacement, self-diffusive coeffcients and normalization wlocity self-correla-tion function is cons derable.</p> <br/>Acta Physica Sinica. 1993 42(2): 283-289. Published 1993-01-05 STRUCTURES AND MICRODYNAMIC BEHAVIOR OF LIQUID TRANSITION METAL Pd AND Pt CHEN KUI-YING, LI QING-CHUN, CHEN XI-CHEN 1993-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(2): 283-289. article doi:10.7498/aps.42.283 10.7498/aps.42.283 Acta Physica Sinica 42 2 1993-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.42.283 283-289 //m.getgobooth.com/en/article/doi/10.7498/aps.42.290 Author(s): NI JUN, WANG SHI-FAN <br/><p>The probability wave theory of atomic configuration is employed to study the most stable superlattices formed in fcc interstitial solutions. Eight basic ordered structures are deduced for octahedral interstices and seven basic ordered structures are deduced for tetragonal interstices.</p> <br/>Acta Physica Sinica. 1993 42(2): 290-296. Published 1993-01-05 Author(s): NI JUN, WANG SHI-FAN <br/><p>The probability wave theory of atomic configuration is employed to study the most stable superlattices formed in fcc interstitial solutions. Eight basic ordered structures are deduced for octahedral interstices and seven basic ordered structures are deduced for tetragonal interstices.</p> <br/>Acta Physica Sinica. 1993 42(2): 290-296. Published 1993-01-05 DETERMINATION OF ORDERED STRUCTURES IN FACE-CENTRED CUBE INTERSTITIAL SOLUTIONS NI JUN, WANG SHI-FAN 1993-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(2): 290-296. article doi:10.7498/aps.42.290 10.7498/aps.42.290 Acta Physica Sinica 42 2 1993-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.42.290 290-296 //m.getgobooth.com/en/article/doi/10.7498/aps.42.297 Author(s): DUAN YU-HUA, GE TING-SUI, ZHANG TIAN-YI <br/><p>Anelastic creep curves of [110] symme rical tilt boundaries with mis-orientation angles 60°and 153.4°in aluminium bicrystals has been measured in torsion. It was found that the relaxation strength associated with the boundary becomes zero below a temperature T0 which has a value of about one half of the melting temperature Tm of bulk aluminium. This shows that a perceptible change of the internal structure of the grain boundary has taken place around this temperature.</p> <br/>Acta Physica Sinica. 1993 42(2): 297-303. Published 1993-01-05 Author(s): DUAN YU-HUA, GE TING-SUI, ZHANG TIAN-YI <br/><p>Anelastic creep curves of [110] symme rical tilt boundaries with mis-orientation angles 60°and 153.4°in aluminium bicrystals has been measured in torsion. It was found that the relaxation strength associated with the boundary becomes zero below a temperature T0 which has a value of about one half of the melting temperature Tm of bulk aluminium. This shows that a perceptible change of the internal structure of the grain boundary has taken place around this temperature.</p> <br/>Acta Physica Sinica. 1993 42(2): 297-303. Published 1993-01-05 TRANSFORMATION TEMPERATURE OF GRAIN BOUNDARY RELAXATION IN ALUMINIUM BICRYSTALS DUAN YU-HUA, GE TING-SUI, ZHANG TIAN-YI 1993-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(2): 297-303. article doi:10.7498/aps.42.297 10.7498/aps.42.297 Acta Physica Sinica 42 2 1993-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.42.297 297-303 //m.getgobooth.com/en/article/doi/10.7498/aps.42.304 Author(s): ZHENG MAO-SHENG, LIU YUN-PENG <br/><p>In the present paper, superlattice phase transition and toughening of intermetallic compo-unds are studied. By writting the Hamiltonian of superlattice phase transition as the Ising's one, the expression of short-range-order parameter in superlattice phase transition P′ =1-exp (-2J/kT) is derived based on the correspondence of Ising model and bond percolation. The phase transition points of superlattice phase transition for systems with L10 and L12 structures are ther obtained by Monte-Carlo simulation, which is P′bc = 0.3436 (for Llo structure), P′bc= 0.4924 (for L12 structure). Furthermore, the relationship between P′bc and the corresponding values Pbc of general percolation process with the same nominal structure P′bc x=Pbc is for-mulated. Finally, the influence of composition variable x to the phase transition point, the or-dering and the brittleness of intermetallic compounds is expounded theoretically. It provides the theoretical basis for the toughening of intermetallic alloys, and also enriches percolation theory.</p> <br/>Acta Physica Sinica. 1993 42(2): 304-308. Published 1993-01-05 Author(s): ZHENG MAO-SHENG, LIU YUN-PENG <br/><p>In the present paper, superlattice phase transition and toughening of intermetallic compo-unds are studied. By writting the Hamiltonian of superlattice phase transition as the Ising's one, the expression of short-range-order parameter in superlattice phase transition P′ =1-exp (-2J/kT) is derived based on the correspondence of Ising model and bond percolation. The phase transition points of superlattice phase transition for systems with L10 and L12 structures are ther obtained by Monte-Carlo simulation, which is P′bc = 0.3436 (for Llo structure), P′bc= 0.4924 (for L12 structure). Furthermore, the relationship between P′bc and the corresponding values Pbc of general percolation process with the same nominal structure P′bc x=Pbc is for-mulated. Finally, the influence of composition variable x to the phase transition point, the or-dering and the brittleness of intermetallic compounds is expounded theoretically. It provides the theoretical basis for the toughening of intermetallic alloys, and also enriches percolation theory.</p> <br/>Acta Physica Sinica. 1993 42(2): 304-308. Published 1993-01-05 PERCOLATION MECHANISM OF SUPERLATTICE PHASE TRANSITION OF INTERMETALLIC COMPOUNDS ZHENG MAO-SHENG, LIU YUN-PENG 1993-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(2): 304-308. article doi:10.7498/aps.42.304 10.7498/aps.42.304 Acta Physica Sinica 42 2 1993-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.42.304 304-308 //m.getgobooth.com/en/article/doi/10.7498/aps.42.309 Author(s): ZHANG XIAO-PING, GAO ZHI-QIANG, SUN BI-WU, XIE KAN, LIN ZHANG-DA <br/><p>High-quality diamond films are grown on Si substrate by hot filament chemcial vapor de-position (HFCVD). With increase of growth time, pure carbon species and mixtures of them are also identified by X-ray photoelectroscopy (XPS) and auger electron spectroscopy (AES). To describe the buffer layers, a gradient model is proposed as Silicon/Si1-xCx/SiC/SiyC1-y/ Diamond. Within the range of 0.10&lt;x, y&lt;0.25, the structural stability is studied by Keating potential.</p> <br/>Acta Physica Sinica. 1993 42(2): 309-313. Published 1993-01-05 Author(s): ZHANG XIAO-PING, GAO ZHI-QIANG, SUN BI-WU, XIE KAN, LIN ZHANG-DA <br/><p>High-quality diamond films are grown on Si substrate by hot filament chemcial vapor de-position (HFCVD). With increase of growth time, pure carbon species and mixtures of them are also identified by X-ray photoelectroscopy (XPS) and auger electron spectroscopy (AES). To describe the buffer layers, a gradient model is proposed as Silicon/Si1-xCx/SiC/SiyC1-y/ Diamond. Within the range of 0.10&lt;x, y&lt;0.25, the structural stability is studied by Keating potential.</p> <br/>Acta Physica Sinica. 1993 42(2): 309-313. Published 1993-01-05 A STUDY ON STRUCTURAL STABILITY OF BUFFER LAYER BETWEEN SILICON SUBSTRATE AND DIAMOND FILM ZHANG XIAO-PING, GAO ZHI-QIANG, SUN BI-WU, XIE KAN, LIN ZHANG-DA 1993-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(2): 309-313. article doi:10.7498/aps.42.309 10.7498/aps.42.309 Acta Physica Sinica 42 2 1993-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.42.309 309-313 //m.getgobooth.com/en/article/doi/10.7498/aps.42.314 Author(s): YU GONG, HAO MAO-SHENG, ZHANG FANG-QING, CHEN GUANG-HUA <br/><p>We have performed simulating annealing in computer by using Monte Carlo technique to produce a random-network model of amorphous silicon. The structural characteristics of this model is in good agretment with that of real sample. Its vibrationol densities of states have been calculated with molecular-dynamics method. The relationships between its locaiized vibrational modes and the structural defects have also been discussed.</p> <br/>Acta Physica Sinica. 1993 42(2): 314-319. Published 1993-01-05 Author(s): YU GONG, HAO MAO-SHENG, ZHANG FANG-QING, CHEN GUANG-HUA <br/><p>We have performed simulating annealing in computer by using Monte Carlo technique to produce a random-network model of amorphous silicon. The structural characteristics of this model is in good agretment with that of real sample. Its vibrationol densities of states have been calculated with molecular-dynamics method. The relationships between its locaiized vibrational modes and the structural defects have also been discussed.</p> <br/>Acta Physica Sinica. 1993 42(2): 314-319. Published 1993-01-05 STUDY ON STRUCTURAL AND VIBRATIONAL PROPERTIES OF AMORPHOUS SILICON FILMS USING A SIMULATING ANNEALING MODEL YU GONG, HAO MAO-SHENG, ZHANG FANG-QING, CHEN GUANG-HUA 1993-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(2): 314-319. article doi:10.7498/aps.42.314 10.7498/aps.42.314 Acta Physica Sinica 42 2 1993-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.42.314 314-319 //m.getgobooth.com/en/article/doi/10.7498/aps.42.320 Author(s): PAN BI-CAI, XIA SHANG-DA <br/><p>The electronic structure of diamond C(111) surface during transition from (2×1) recons-truction to (1×1) structure induced by adsorbed hydrogens is studied using ab initio DV-Xα mathod in this paper. The result shows that the role of adsorbed hydrogen in the structural transition is firstly distorting the Pandey π-bond in the (2×1) reconstruction, then breaking the (SP2-hybrid + Pandey π-bond) structure and forming the sp3-hybrid bonds.</p> <br/>Acta Physica Sinica. 1993 42(2): 320-325. Published 1993-01-05 Author(s): PAN BI-CAI, XIA SHANG-DA <br/><p>The electronic structure of diamond C(111) surface during transition from (2×1) recons-truction to (1×1) structure induced by adsorbed hydrogens is studied using ab initio DV-Xα mathod in this paper. The result shows that the role of adsorbed hydrogen in the structural transition is firstly distorting the Pandey π-bond in the (2×1) reconstruction, then breaking the (SP2-hybrid + Pandey π-bond) structure and forming the sp3-hybrid bonds.</p> <br/>Acta Physica Sinica. 1993 42(2): 320-325. Published 1993-01-05 INVESTIGATION OF ELECTRONIC STRUCTURE IN THE HYDROGEN-INDUCED STRUCTURAL TRANSITION FROM DIAMOND C(111)-(2×1) TO (1×1) PAN BI-CAI, XIA SHANG-DA 1993-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(2): 320-325. article doi:10.7498/aps.42.320 10.7498/aps.42.320 Acta Physica Sinica 42 2 1993-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.42.320 320-325 //m.getgobooth.com/en/article/doi/10.7498/aps.42.326 Author(s): TAO ZHEN-LAN, D.E. AlBURGER, K.W. JONES, Y.D. YAO, Y.H. KAO <br/><p>The experimental method for determining the oxygen content in high Tc superconduc tors is described in detail. This method is applied to determination of oxygen content in high Tc Y-Ba-Cu-O and Bi-Sr-Ca-Cu-O samples in which the stoichiometry is varied by reducing the copper and bismuth concentrations. The oxygen concentration is found to vary linearly with Cu (x= 0-0,2) and Bi (x= 0-0.4) deficiencies in YBa2Cu3(1-x)Oy and Bi2(1-x)Sr2CaCu2Oy respectively. X-ray powder diffraction measurements show that the compound of YBa2Cu3(1-x)Oy, is orthorhombic in the variation range of x=0-0.2</p> <br/>Acta Physica Sinica. 1993 42(2): 326-330. Published 1993-01-05 Author(s): TAO ZHEN-LAN, D.E. AlBURGER, K.W. JONES, Y.D. YAO, Y.H. KAO <br/><p>The experimental method for determining the oxygen content in high Tc superconduc tors is described in detail. This method is applied to determination of oxygen content in high Tc Y-Ba-Cu-O and Bi-Sr-Ca-Cu-O samples in which the stoichiometry is varied by reducing the copper and bismuth concentrations. The oxygen concentration is found to vary linearly with Cu (x= 0-0,2) and Bi (x= 0-0.4) deficiencies in YBa2Cu3(1-x)Oy and Bi2(1-x)Sr2CaCu2Oy respectively. X-ray powder diffraction measurements show that the compound of YBa2Cu3(1-x)Oy, is orthorhombic in the variation range of x=0-0.2</p> <br/>Acta Physica Sinica. 1993 42(2): 326-330. Published 1993-01-05 DETERMINATION OF OXYGEN CONTENT IN HIGH Tc SUPERCONDUCTORS BY DEUTERON PARTICLE ACTIVATION ANALYSIS TAO ZHEN-LAN, D.E. AlBURGER, K.W. JONES, Y.D. YAO, Y.H. KAO 1993-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(2): 326-330. article doi:10.7498/aps.42.326 10.7498/aps.42.326 Acta Physica Sinica 42 2 1993-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.42.326 326-330 //m.getgobooth.com/en/article/doi/10.7498/aps.42.331 Author(s): GUAN XI-WEN, XIONG ZHUANG, ZHOU HUAN-QIANG <br/><p>Hidden local gauge invariance in Fateev-Zamolodchikov quantum spin chain is studied in detail in the framework of the quantum inverse scattering method (QISM). It is found that, similar to the case of spin 1/2, this model admits an Abelian U(1) gauge transformation and that the energy spectrum is gauge invariant whereas the eigenvectors are explicitly gauge dependent.</p> <br/>Acta Physica Sinica. 1993 42(2): 331-339. Published 1993-01-05 Author(s): GUAN XI-WEN, XIONG ZHUANG, ZHOU HUAN-QIANG <br/><p>Hidden local gauge invariance in Fateev-Zamolodchikov quantum spin chain is studied in detail in the framework of the quantum inverse scattering method (QISM). It is found that, similar to the case of spin 1/2, this model admits an Abelian U(1) gauge transformation and that the energy spectrum is gauge invariant whereas the eigenvectors are explicitly gauge dependent.</p> <br/>Acta Physica Sinica. 1993 42(2): 331-339. Published 1993-01-05 HIDDEN LOCAL GAUGE INVARIANCE IN FATEEV-ZAMOLO-DCHIKOV QUANTUM SPIN CHAIN GUAN XI-WEN, XIONG ZHUANG, ZHOU HUAN-QIANG 1993-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(2): 331-339. article doi:10.7498/aps.42.331 10.7498/aps.42.331 Acta Physica Sinica 42 2 1993-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.42.331 331-339 //m.getgobooth.com/en/article/doi/10.7498/aps.42.340 Author(s): GUI YUN-LONG, LIN SEN-HAO, ZHANG JIA-HUA <br/><p>The four-probe technique is used to measire the electric conductivity of polyacetylene doped with iodine. For dopant concentration ranging from 1.0 to 8.3 mol% in cis-(CH)x, the obtained conductivity values for different temperatures are consistent with the variable-range hopping model. The mechanisms of the temperature dependence of the ESR spin magnetic susceptibility and line width for low iodine concentrations are studied.</p> <br/>Acta Physica Sinica. 1993 42(2): 340-344. Published 1993-01-05 Author(s): GUI YUN-LONG, LIN SEN-HAO, ZHANG JIA-HUA <br/><p>The four-probe technique is used to measire the electric conductivity of polyacetylene doped with iodine. For dopant concentration ranging from 1.0 to 8.3 mol% in cis-(CH)x, the obtained conductivity values for different temperatures are consistent with the variable-range hopping model. The mechanisms of the temperature dependence of the ESR spin magnetic susceptibility and line width for low iodine concentrations are studied.</p> <br/>Acta Physica Sinica. 1993 42(2): 340-344. Published 1993-01-05 STUDIES ON ELECTRIC CONDUCTIVITY AND ELECTRON SPIN RESONANCE FOR IODINE DOPED POLYACETYLENE GUI YUN-LONG, LIN SEN-HAO, ZHANG JIA-HUA 1993-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1993 42(2): 340-344. article doi:10.7498/aps.42.340 10.7498/aps.42.340 Acta Physica Sinica 42 2 1993-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.42.340 340-344