//m.getgobooth.com/ 必威体育下载 daily 15 2024-10-24 17:40:04 apsoffice@iphy.ac.cn apsoffice@iphy.ac.cn 2024-10-24 17:40:04 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.43.169 Author(s): ZHANG YAO-ZHONG <br/><p>In this paper a method of direct derivation for the universal R matrix of quantum group Uq(SU(1，1)) is given. It is simple and efficient for quantum groups of low rank at least. By the application of the R matrix obtained, the explicit expression for Casimir invariant of the above guantum group is given. As an application, the second order Casimir operator is rederived as well.</p> <br/>Acta Physica Sinica. 1994 43(2): 169-174. Published 1994-01-05 Author(s): ZHANG YAO-ZHONG <br/><p>In this paper a method of direct derivation for the universal R matrix of quantum group Uq(SU(1，1)) is given. It is simple and efficient for quantum groups of low rank at least. By the application of the R matrix obtained, the explicit expression for Casimir invariant of the above guantum group is given. As an application, the second order Casimir operator is rederived as well.</p> <br/>Acta Physica Sinica. 1994 43(2): 169-174. Published 1994-01-05 QUANTUM GROUP Uq(SU( 1，1))，UNIVERSAL R MATRIX AND CASIMIR INVARIANT ZHANG YAO-ZHONG 1994-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1994 43(2): 169-174. article doi:10.7498/aps.43.169 10.7498/aps.43.169 Acta Physica Sinica 43 2 1994-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.43.169 169-174 //m.getgobooth.com/en/article/doi/10.7498/aps.43.175 Author(s): WANG YAN-SHEN, YANG WEN-LI, YANG HUAN-XIONG, HOU BO-YU <br/><p>By imposing conformally broken constraints on SL(2,R) WZNW model, we obtain a new classical completely integrable system which contains the famous sinh-Gordon system as a special case. The integrability of this extended sink-Gordon system is exhibited by the existence of the Lax pair with spectral parameters. And its funda-mental .Poisson-Lie brackets can be ultralocalized, corresponding classical r-matrix depends on two spetral parameters and satisfies the classical Yang-Baxter equation. After a suitable automorphic transformation of the loop algebra on which the above Lax pair takes value, such an ultralocalized r-matrix can be classified to the so-cal-led trigonometric type of r-matrices depending essentially on one spectral parameter.</p> <br/>Acta Physica Sinica. 1994 43(2): 175-184. Published 1994-01-05 Author(s): WANG YAN-SHEN, YANG WEN-LI, YANG HUAN-XIONG, HOU BO-YU <br/><p>By imposing conformally broken constraints on SL(2,R) WZNW model, we obtain a new classical completely integrable system which contains the famous sinh-Gordon system as a special case. The integrability of this extended sink-Gordon system is exhibited by the existence of the Lax pair with spectral parameters. And its funda-mental .Poisson-Lie brackets can be ultralocalized, corresponding classical r-matrix depends on two spetral parameters and satisfies the classical Yang-Baxter equation. After a suitable automorphic transformation of the loop algebra on which the above Lax pair takes value, such an ultralocalized r-matrix can be classified to the so-cal-led trigonometric type of r-matrices depending essentially on one spectral parameter.</p> <br/>Acta Physica Sinica. 1994 43(2): 175-184. Published 1994-01-05 A CLASSICAL COMPLETELY INTEGRABLE EXTENDED SINH-CORDON SYSTEM ARISING FROM NON CONFORMALLY CONSTRAINED SL(2,R) WZNW MODEL (I) WANG YAN-SHEN, YANG WEN-LI, YANG HUAN-XIONG, HOU BO-YU 1994-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1994 43(2): 175-184. article doi:10.7498/aps.43.175 10.7498/aps.43.175 Acta Physica Sinica 43 2 1994-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.43.175 175-184 //m.getgobooth.com/en/article/doi/10.7498/aps.43.185 Author(s): WANG YAN-SHEN, YANG WEN-LI, YANG HUAN-XIONG, HOU BO-YU <br/><p>On the basis of the study in Ref [4],we construct the dressing transformations of the fundamental variables and show the dressing symmetry of the constrained system (extended sinh -Gordon equations). Finally, we discuss the ultralocalizable-criterion of an arbitrary 2D integrable model.</p> <br/>Acta Physica Sinica. 1994 43(2): 185-190. Published 1994-01-05 Author(s): WANG YAN-SHEN, YANG WEN-LI, YANG HUAN-XIONG, HOU BO-YU <br/><p>On the basis of the study in Ref [4],we construct the dressing transformations of the fundamental variables and show the dressing symmetry of the constrained system (extended sinh -Gordon equations). Finally, we discuss the ultralocalizable-criterion of an arbitrary 2D integrable model.</p> <br/>Acta Physica Sinica. 1994 43(2): 185-190. Published 1994-01-05 A CLASSICAL COMPLETELY INTEGRABLE EXTENDED SINH-CORDON SYSTEM ARISING FROM NON CONFORMALLY CONSTRAINED SL(2,R) WZNW MODEL (II) WANG YAN-SHEN, YANG WEN-LI, YANG HUAN-XIONG, HOU BO-YU 1994-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1994 43(2): 185-190. article doi:10.7498/aps.43.185 10.7498/aps.43.185 Acta Physica Sinica 43 2 1994-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.43.185 185-190 //m.getgobooth.com/en/article/doi/10.7498/aps.43.191 Author(s): XIE FA-GENG <br/><p>The one-dimensional biquadratic map is studied by means of symbolic dynamics in two parameter plane. The skeleton of superstable orbits and the joints in the kne-ading plane have been constructed. A criterion of the existence of topological chaos has been given according to the topological entropy.</p> <br/>Acta Physica Sinica. 1994 43(2): 191-197. Published 1994-01-05 Author(s): XIE FA-GENG <br/><p>The one-dimensional biquadratic map is studied by means of symbolic dynamics in two parameter plane. The skeleton of superstable orbits and the joints in the kne-ading plane have been constructed. A criterion of the existence of topological chaos has been given according to the topological entropy.</p> <br/>Acta Physica Sinica. 1994 43(2): 191-197. Published 1994-01-05 SYMBOLIC DYNAMICS OF THE ONE-DIMENSIONAL BIQUADRATIC MAP WITH TWO PARAMETERS XIE FA-GENG 1994-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1994 43(2): 191-197. article doi:10.7498/aps.43.191 10.7498/aps.43.191 Acta Physica Sinica 43 2 1994-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.43.191 191-197 //m.getgobooth.com/en/article/doi/10.7498/aps.43.198 Author(s): DAI ZI-GAO, LU TAN <br/><p>Since the equilibrium composition of strange matter is crucial to the accurate calculation of its neutrino energy loss rates, we determine the composition by using the thermodynamic potentials (per unit volume) of the strange matter, and find that the electron abundance decreases with the strong interaction coupling constant or ba-ryon density. After deriving the formula of neutrino energy loss rates of the strange matter, we study the cooling of a homogeneous strange star with a thin crust in detail, and compare it with that of a neutron star. We conclude that the surface temperature of a young strange star is much less than that of a young neutron star of the same age, so one can distinguish between a strange star and a neutron star.</p> <br/>Acta Physica Sinica. 1994 43(2): 198-204. Published 1994-01-05 Author(s): DAI ZI-GAO, LU TAN <br/><p>Since the equilibrium composition of strange matter is crucial to the accurate calculation of its neutrino energy loss rates, we determine the composition by using the thermodynamic potentials (per unit volume) of the strange matter, and find that the electron abundance decreases with the strong interaction coupling constant or ba-ryon density. After deriving the formula of neutrino energy loss rates of the strange matter, we study the cooling of a homogeneous strange star with a thin crust in detail, and compare it with that of a neutron star. We conclude that the surface temperature of a young strange star is much less than that of a young neutron star of the same age, so one can distinguish between a strange star and a neutron star.</p> <br/>Acta Physica Sinica. 1994 43(2): 198-204. Published 1994-01-05 COOLING OF A STRANGE STAR DAI ZI-GAO, LU TAN 1994-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1994 43(2): 198-204. article doi:10.7498/aps.43.198 10.7498/aps.43.198 Acta Physica Sinica 43 2 1994-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.43.198 198-204 //m.getgobooth.com/en/article/doi/10.7498/aps.43.205 Author(s): TENG HUA-GUO, SHEN BAI-FEI, ZHANG WEN-QI, XU ZHI-ZHAN <br/><p>By using the theory of configuration-interaction, we ireade a analysis of the effect of configuration interaction on the autoionization rates and branch ratios of the configurations 2p53s3l(l=0，1，2) for the Nalike Cu ion. It is shown that the autoionization rates in all the three configurations are changed substantially when the configuration-interaction are included in comparing with the calculations in single-configuration approxmation, and the branch ratios increase both in the configuration 2p53s3d and in 2p53s3p but decrease in the configuration 2p53s2.</p> <br/>Acta Physica Sinica. 1994 43(2): 205-210. Published 1994-01-05 Author(s): TENG HUA-GUO, SHEN BAI-FEI, ZHANG WEN-QI, XU ZHI-ZHAN <br/><p>By using the theory of configuration-interaction, we ireade a analysis of the effect of configuration interaction on the autoionization rates and branch ratios of the configurations 2p53s3l(l=0，1，2) for the Nalike Cu ion. It is shown that the autoionization rates in all the three configurations are changed substantially when the configuration-interaction are included in comparing with the calculations in single-configuration approxmation, and the branch ratios increase both in the configuration 2p53s3d and in 2p53s3p but decrease in the configuration 2p53s2.</p> <br/>Acta Physica Sinica. 1994 43(2): 205-210. Published 1994-01-05 EFFECT OF CONFIGURATION INTERACTION ON THE AUTOIONIZATION RATES AND BRANCH RATIOS OF Na LIKE Cu ION TENG HUA-GUO, SHEN BAI-FEI, ZHANG WEN-QI, XU ZHI-ZHAN 1994-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1994 43(2): 205-210. article doi:10.7498/aps.43.205 10.7498/aps.43.205 Acta Physica Sinica 43 2 1994-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.43.205 205-210 //m.getgobooth.com/en/article/doi/10.7498/aps.43.211 Author(s): TANG ZHI-LIE, LIN LI-ZHONG <br/><p>The theoretical analysis of two-photon photoacoustic effect is presented. The wave equation of two-photon photoacoustic efffct is derived. And the general expre-ssion of two-photon photoacoustic effect is given.</p> <br/>Acta Physica Sinica. 1994 43(2): 211-218. Published 1994-01-05 Author(s): TANG ZHI-LIE, LIN LI-ZHONG <br/><p>The theoretical analysis of two-photon photoacoustic effect is presented. The wave equation of two-photon photoacoustic efffct is derived. And the general expre-ssion of two-photon photoacoustic effect is given.</p> <br/>Acta Physica Sinica. 1994 43(2): 211-218. Published 1994-01-05 THEORY OF TWO-PHOTEN PHOTOACOUSTIC EFFECT TANG ZHI-LIE, LIN LI-ZHONG 1994-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1994 43(2): 211-218. article doi:10.7498/aps.43.211 10.7498/aps.43.211 Acta Physica Sinica 43 2 1994-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.43.211 211-218 //m.getgobooth.com/en/article/doi/10.7498/aps.43.219 Author(s): LUO ZHEN-FEI, XU ZHI-ZHAN, LIN FU-CHENG <br/><p>The solution for the equations of atomic density matrix is obtained, without resorting to any approximation, in the Ξ-type of three-level system with lower-level coherence. The conditions on pumping are analyzed in the strong-coherence case for lasing without inversion and the saturation term is derived.</p> <br/>Acta Physica Sinica. 1994 43(2): 219-224. Published 1994-01-05 Author(s): LUO ZHEN-FEI, XU ZHI-ZHAN, LIN FU-CHENG <br/><p>The solution for the equations of atomic density matrix is obtained, without resorting to any approximation, in the Ξ-type of three-level system with lower-level coherence. The conditions on pumping are analyzed in the strong-coherence case for lasing without inversion and the saturation term is derived.</p> <br/>Acta Physica Sinica. 1994 43(2): 219-224. Published 1994-01-05 LASING WITHOUT INVERSION: GAIN AND SATURATION LUO ZHEN-FEI, XU ZHI-ZHAN, LIN FU-CHENG 1994-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1994 43(2): 219-224. article doi:10.7498/aps.43.219 10.7498/aps.43.219 Acta Physica Sinica 43 2 1994-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.43.219 219-224 //m.getgobooth.com/en/article/doi/10.7498/aps.43.225 Author(s): ZHANG SHI-CHANG, LIU QING-XIANG, XU YONG <br/><p>Nonlinear simulation of the entropy-like quantity is given to the equilibrium electrons in a free-electron laser with reversed guide field. Results indicate that the quality of the electron beam may be better than the oae in the case of positive guide field. However, the quality of the beam is spoiled at the antiresonance. The concl-usions from the entropy-like quantity principally coincide with the experiment made by the MIT researchers.</p> <br/>Acta Physica Sinica. 1994 43(2): 225-232. Published 1994-01-05 Author(s): ZHANG SHI-CHANG, LIU QING-XIANG, XU YONG <br/><p>Nonlinear simulation of the entropy-like quantity is given to the equilibrium electrons in a free-electron laser with reversed guide field. Results indicate that the quality of the electron beam may be better than the oae in the case of positive guide field. However, the quality of the beam is spoiled at the antiresonance. The concl-usions from the entropy-like quantity principally coincide with the experiment made by the MIT researchers.</p> <br/>Acta Physica Sinica. 1994 43(2): 225-232. Published 1994-01-05 ENTROPY-LIKE QUANTITY OF THE EQUILIBRIUM ELECTRONS IN A FREE-ELECTRON LASER WITH REVERSED GUIDE FIELD ZHANG SHI-CHANG, LIU QING-XIANG, XU YONG 1994-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1994 43(2): 225-232. article doi:10.7498/aps.43.225 10.7498/aps.43.225 Acta Physica Sinica 43 2 1994-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.43.225 225-232 //m.getgobooth.com/en/article/doi/10.7498/aps.43.233 Author(s): Lü ZHEN-GUO, ZHOU ZUO-PING, WU QI, LI QING-XING, YU ZHEN-YIN <br/><p>Dynamic processes of the modelocked laser based on a auxiliary coupled cavity containing a nonlinear frequency-doubling crystal has been systematically studied in this paper. And, the specific formulas of the output pulse width of this modelocked laser in instantaneously dynamic equilibrium are given. Moreover, the results of nu-merical analysis and calculation show that its modelocking output properties are su-perior to that of the laser modelocked by an intracavity frequency-doubling crystal.</p> <br/>Acta Physica Sinica. 1994 43(2): 233-238. Published 1994-01-05 Author(s): Lü ZHEN-GUO, ZHOU ZUO-PING, WU QI, LI QING-XING, YU ZHEN-YIN <br/><p>Dynamic processes of the modelocked laser based on a auxiliary coupled cavity containing a nonlinear frequency-doubling crystal has been systematically studied in this paper. And, the specific formulas of the output pulse width of this modelocked laser in instantaneously dynamic equilibrium are given. Moreover, the results of nu-merical analysis and calculation show that its modelocking output properties are su-perior to that of the laser modelocked by an intracavity frequency-doubling crystal.</p> <br/>Acta Physica Sinica. 1994 43(2): 233-238. Published 1994-01-05 TIME-DOMAIN ANALYSIS OF THE MODE一LOCKED PRO-CESS BASED ON A NOVEL NONLINEAR COUPLED CAVITY Lü ZHEN-GUO, ZHOU ZUO-PING, WU QI, LI QING-XING, YU ZHEN-YIN 1994-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1994 43(2): 233-238. article doi:10.7498/aps.43.233 10.7498/aps.43.233 Acta Physica Sinica 43 2 1994-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.43.233 233-238 //m.getgobooth.com/en/article/doi/10.7498/aps.43.239 Author(s): HUANG CHAO-SONG, LI JUN, M. C. KELLEY <br/><p>Coupling between atmospheric gravity waves and plasma interchange instability in the equatorial ionosphere is studied. The interchange instability is saturated at a small amplitude by nonlinear effects if there are not any external geophysical distu-rbances to influence it. It is shown that the gravity waves can initiate the interchange instability under some conditions. The initiated instability grows to an amplitude of 50% even larger and forms plasma bubbles if the amplitude of the seed ,gravity waves is large enough. The present theory shows physical mechanism for producing large scale equatorial spread F and explains a lot of ionospheric observations.</p> <br/>Acta Physica Sinica. 1994 43(2): 239-247. Published 1994-01-05 Author(s): HUANG CHAO-SONG, LI JUN, M. C. KELLEY <br/><p>Coupling between atmospheric gravity waves and plasma interchange instability in the equatorial ionosphere is studied. The interchange instability is saturated at a small amplitude by nonlinear effects if there are not any external geophysical distu-rbances to influence it. It is shown that the gravity waves can initiate the interchange instability under some conditions. The initiated instability grows to an amplitude of 50% even larger and forms plasma bubbles if the amplitude of the seed ,gravity waves is large enough. The present theory shows physical mechanism for producing large scale equatorial spread F and explains a lot of ionospheric observations.</p> <br/>Acta Physica Sinica. 1994 43(2): 239-247. Published 1994-01-05 COUPLING BETWEEN ATMOSPHERIC GRAVITY WAVES AND PLASMA INTERCHANGE INSTABILITY IN THE IONOSPHERE HUANG CHAO-SONG, LI JUN, M. C. KELLEY 1994-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1994 43(2): 239-247. article doi:10.7498/aps.43.239 10.7498/aps.43.239 Acta Physica Sinica 43 2 1994-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.43.239 239-247 //m.getgobooth.com/en/article/doi/10.7498/aps.43.248 Author(s): HE PI-MO, XU YA-BO, LI HAI-YANG, QI ZHONG-PU, CAI LIAN-ZHEN <br/><p>The C60 single crystals up to mm-size were grown. X-ray diffraction result shows that C60 single crystal is of fcc structure, with lattice parameter of 1.413 nm. An abrupt change of conductivity (at 251K) related to the phase transition shows that C60 single crystal is of high purity and homogeneity. A drop of activation energy around 274K was observed. This activation energy drop may be an indication of another phase transition.</p> <br/>Acta Physica Sinica. 1994 43(2): 248-252. Published 1994-01-05 Author(s): HE PI-MO, XU YA-BO, LI HAI-YANG, QI ZHONG-PU, CAI LIAN-ZHEN <br/><p>The C60 single crystals up to mm-size were grown. X-ray diffraction result shows that C60 single crystal is of fcc structure, with lattice parameter of 1.413 nm. An abrupt change of conductivity (at 251K) related to the phase transition shows that C60 single crystal is of high purity and homogeneity. A drop of activation energy around 274K was observed. This activation energy drop may be an indication of another phase transition.</p> <br/>Acta Physica Sinica. 1994 43(2): 248-252. Published 1994-01-05 GROWTH AND CHARACTERIZATION OF C60 SINGLE CRYSTAL HE PI-MO, XU YA-BO, LI HAI-YANG, QI ZHONG-PU, CAI LIAN-ZHEN 1994-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1994 43(2): 248-252. article doi:10.7498/aps.43.248 10.7498/aps.43.248 Acta Physica Sinica 43 2 1994-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.43.248 248-252 //m.getgobooth.com/en/article/doi/10.7498/aps.43.253 Author(s): FAN HONG-YI, XU ZHI-HUA <br/><p>We study a tight binding model Hamiltonian of the one-dimensional Bravais lat-tice. This Hamiltonian contains one impurity energy site and two hopping constants between this site and its two nearest neighbours. The formation and properties of the localized states of this model is analysed by virtue of the Green function method.</p> <br/>Acta Physica Sinica. 1994 43(2): 253-257. Published 1994-01-05 Author(s): FAN HONG-YI, XU ZHI-HUA <br/><p>We study a tight binding model Hamiltonian of the one-dimensional Bravais lat-tice. This Hamiltonian contains one impurity energy site and two hopping constants between this site and its two nearest neighbours. The formation and properties of the localized states of this model is analysed by virtue of the Green function method.</p> <br/>Acta Physica Sinica. 1994 43(2): 253-257. Published 1994-01-05 A MIXED IMPURITIES MODEL OF THE ONE-DIMENSIONAL LATTICE FAN HONG-YI, XU ZHI-HUA 1994-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1994 43(2): 253-257. article doi:10.7498/aps.43.253 10.7498/aps.43.253 Acta Physica Sinica 43 2 1994-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.43.253 253-257 //m.getgobooth.com/en/article/doi/10.7498/aps.43.258 Author(s): LUAN HONG-FA, XIAO ZHI-GANG, KE JUN <br/><p>Hanis theory of precipitate growth controlled by diffusion is demonstrated by studying the growth of the oxygen precipitates at high temperature with two-step heat treatment. And the nucleation of the oxygen precipitates is disussed according to Ham's theory tantatively.</p> <br/>Acta Physica Sinica. 1994 43(2): 258-266. Published 1994-01-05 Author(s): LUAN HONG-FA, XIAO ZHI-GANG, KE JUN <br/><p>Hanis theory of precipitate growth controlled by diffusion is demonstrated by studying the growth of the oxygen precipitates at high temperature with two-step heat treatment. And the nucleation of the oxygen precipitates is disussed according to Ham's theory tantatively.</p> <br/>Acta Physica Sinica. 1994 43(2): 258-266. Published 1994-01-05 DEMONSTRATION AND APPLICATION OF HAM'S THEORY LUAN HONG-FA, XIAO ZHI-GANG, KE JUN 1994-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1994 43(2): 258-266. article doi:10.7498/aps.43.258 10.7498/aps.43.258 Acta Physica Sinica 43 2 1994-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.43.258 258-266 //m.getgobooth.com/en/article/doi/10.7498/aps.43.267 Author(s): LIU KUN, CHU JUN-HAO, LI BIAO, TANG DING-YUAN <br/><p>By using a modified self-consistent variation method, we have calculated the subband structures of n-type inversion layer in p-type HgCdTe NIS (metal-insulator-semiconductor) devices, obtained the ground subband energy E0 and its dependence on both the doping concentration in bulk HgCdTe and the surface electron concent-ration in the inversion layer. In the treament, the influence of non-parabolic band structure due to the interaction between the conduction band and the valence band, the Zener tunneling, the resonant states and the screening effect of the surface electric field have been considered. A simple and useful formula for calculating gro-and state energy E0 has been presented. The calculated results show good agreement with experimental data.</p> <br/>Acta Physica Sinica. 1994 43(2): 267-273. Published 1994-01-05 Author(s): LIU KUN, CHU JUN-HAO, LI BIAO, TANG DING-YUAN <br/><p>By using a modified self-consistent variation method, we have calculated the subband structures of n-type inversion layer in p-type HgCdTe NIS (metal-insulator-semiconductor) devices, obtained the ground subband energy E0 and its dependence on both the doping concentration in bulk HgCdTe and the surface electron concent-ration in the inversion layer. In the treament, the influence of non-parabolic band structure due to the interaction between the conduction band and the valence band, the Zener tunneling, the resonant states and the screening effect of the surface electric field have been considered. A simple and useful formula for calculating gro-and state energy E0 has been presented. The calculated results show good agreement with experimental data.</p> <br/>Acta Physica Sinica. 1994 43(2): 267-273. Published 1994-01-05 GROUND STATE ENERGY OF THE ELECTRON SUBBAND IN p-TYPE HgCdTe INVERSION LAYER LIU KUN, CHU JUN-HAO, LI BIAO, TANG DING-YUAN 1994-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1994 43(2): 267-273. article doi:10.7498/aps.43.267 10.7498/aps.43.267 Acta Physica Sinica 43 2 1994-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.43.267 267-273 //m.getgobooth.com/en/article/doi/10.7498/aps.43.274 Author(s): LI NAN, QIAN SHEND-FA, FU CHUN-SHENG, XIE SI-SHEN <br/><p>By using STS, combined with STM imaging, the STS spectra d(lnI)/d(lnV) -eV were measured point by point along a line on the surface of a single crystal graphite. The local density of states (LDOS) around the Fermi level EF obtained from the spectra showed basically an agreement with that of theoretical calculation. By plotting the energy positions of the LDOS peaks around EF with respect to the measurement positions, the spatial variations of the energy band of graphite close to EF were shown. With a discussion of the local electronic structure around the ine-quivalent A, B type atoms on the surface, a simple model calculation for the spatial variations of the energy band was conducted and that showed an agreement with the experimental results. By comparison of the results, the site of A type atoms on the graphite surface, which did not appear in the STM image, was determined.</p> <br/>Acta Physica Sinica. 1994 43(2): 274-281. Published 1994-01-05 Author(s): LI NAN, QIAN SHEND-FA, FU CHUN-SHENG, XIE SI-SHEN <br/><p>By using STS, combined with STM imaging, the STS spectra d(lnI)/d(lnV) -eV were measured point by point along a line on the surface of a single crystal graphite. The local density of states (LDOS) around the Fermi level EF obtained from the spectra showed basically an agreement with that of theoretical calculation. By plotting the energy positions of the LDOS peaks around EF with respect to the measurement positions, the spatial variations of the energy band of graphite close to EF were shown. With a discussion of the local electronic structure around the ine-quivalent A, B type atoms on the surface, a simple model calculation for the spatial variations of the energy band was conducted and that showed an agreement with the experimental results. By comparison of the results, the site of A type atoms on the graphite surface, which did not appear in the STM image, was determined.</p> <br/>Acta Physica Sinica. 1994 43(2): 274-281. Published 1994-01-05 A STUDY ON THE LOCAL ELECTRONIC STRUCTURE OF GRAPHITE SURFACE WITH SCANNING TUNNELING SPECTROSCOPY (STS) LI NAN, QIAN SHEND-FA, FU CHUN-SHENG, XIE SI-SHEN 1994-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1994 43(2): 274-281. article doi:10.7498/aps.43.274 10.7498/aps.43.274 Acta Physica Sinica 43 2 1994-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.43.274 274-281 //m.getgobooth.com/en/article/doi/10.7498/aps.43.282 Author(s): WEI YA-YI, SHEN JIN-XI, ZHENG GUO-ZHEN, GUO SHAO-LING, TANG DING-YUAN, PENG ZHENG-FU, ZHANG YUN-QIANG <br/><p>A new type of AlxGa1-xAs/GaAs beterojunction based on Si δ-doping has been fabricated by MBE method. We measured the magnetoresistances, mobility and Hall resistance of the 2-D electron gas at the junction in a transvers magnetic field from 0.3 to 30K. Using Fourier-transform analysis, the distribution of electrons and their effective masses for each subband are determined. which are ｍ0*／ｍ0＝０．０７３，ｍ1*／ｍ0＝０．０６８. With the decreasing of temperature，the electrons in each subband increase continuously. We observed abnormal peaks in magnetoresistance wben magnetic field was scanned from 0 to 7T at 0.3K.</p> <br/>Acta Physica Sinica. 1994 43(2): 282-288. Published 1994-01-05 Author(s): WEI YA-YI, SHEN JIN-XI, ZHENG GUO-ZHEN, GUO SHAO-LING, TANG DING-YUAN, PENG ZHENG-FU, ZHANG YUN-QIANG <br/><p>A new type of AlxGa1-xAs/GaAs beterojunction based on Si δ-doping has been fabricated by MBE method. We measured the magnetoresistances, mobility and Hall resistance of the 2-D electron gas at the junction in a transvers magnetic field from 0.3 to 30K. Using Fourier-transform analysis, the distribution of electrons and their effective masses for each subband are determined. which are ｍ0*／ｍ0＝０．０７３，ｍ1*／ｍ0＝０．０６８. With the decreasing of temperature，the electrons in each subband increase continuously. We observed abnormal peaks in magnetoresistance wben magnetic field was scanned from 0 to 7T at 0.3K.</p> <br/>Acta Physica Sinica. 1994 43(2): 282-288. Published 1994-01-05 STUDY OF SdH OSCILLATIONS OF 2-D ELECTRON GAS IN Si δ-DOPED AlxGa1-xAs/GaAs HETEROJUNCTION WEI YA-YI, SHEN JIN-XI, ZHENG GUO-ZHEN, GUO SHAO-LING, TANG DING-YUAN, PENG ZHENG-FU, ZHANG YUN-QIANG 1994-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1994 43(2): 282-288. article doi:10.7498/aps.43.282 10.7498/aps.43.282 Acta Physica Sinica 43 2 1994-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.43.282 282-288 //m.getgobooth.com/en/article/doi/10.7498/aps.43.289 Author(s): LU FANG, JIANG JIA-YU, GONG DA-WEI, SUN HENG-HUI <br/><p>A single frequency admittance spectroscopy technique is introduced for determining the band discontinuity on Si/GexSi1-x/Si single quantum well (SQW). By using this method, the more accurate experimental results can be obtaind from a single frequency admittance spectrum. For an alloy with composition x=0.33，we get the activation energy Ea＝0.20eV. In order to obtain the value of the band offset，it is necessary to determine the position of Fermi level which depends on the dopam concentration inside and outside the well, the band offset of hetero-interface and temperature. By solving Poisson equation, we get the energy band diagram and Fermi level of the test sample. It is shown that the Fermi level lies about 40 meV above the top of valance band in the well. And due iv the carrier transfer at the hetero-interface, the carrier concentration (about ２×１０17ｃｍ－３) in the well is one order large than dopant concentration(1×１０16ｃｍ－３). The energy bands at two sides of the interfaces are bent by about 0.006 eV in the well and O.11eV in the barrier, hence the valance band offset can be calculated as 0.16eV. The accuracy of this technique can also be verified from reconstruction of C-T and G-T curves by cumputer simulation.</p> <br/>Acta Physica Sinica. 1994 43(2): 289-296. Published 1994-01-05 Author(s): LU FANG, JIANG JIA-YU, GONG DA-WEI, SUN HENG-HUI <br/><p>A single frequency admittance spectroscopy technique is introduced for determining the band discontinuity on Si/GexSi1-x/Si single quantum well (SQW). By using this method, the more accurate experimental results can be obtaind from a single frequency admittance spectrum. For an alloy with composition x=0.33，we get the activation energy Ea＝0.20eV. In order to obtain the value of the band offset，it is necessary to determine the position of Fermi level which depends on the dopam concentration inside and outside the well, the band offset of hetero-interface and temperature. By solving Poisson equation, we get the energy band diagram and Fermi level of the test sample. It is shown that the Fermi level lies about 40 meV above the top of valance band in the well. And due iv the carrier transfer at the hetero-interface, the carrier concentration (about ２×１０17ｃｍ－３) in the well is one order large than dopant concentration(1×１０16ｃｍ－３). The energy bands at two sides of the interfaces are bent by about 0.006 eV in the well and O.11eV in the barrier, hence the valance band offset can be calculated as 0.16eV. The accuracy of this technique can also be verified from reconstruction of C-T and G-T curves by cumputer simulation.</p> <br/>Acta Physica Sinica. 1994 43(2): 289-296. Published 1994-01-05 MEASUREMENT OF THE BAND OFFSET IN GexSi1-x/Si SINGLE QUANTUM WELL BY USING SINGLE FREQUENCY ADMITTANCE SPECTROSCOPY LU FANG, JIANG JIA-YU, GONG DA-WEI, SUN HENG-HUI 1994-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1994 43(2): 289-296. article doi:10.7498/aps.43.289 10.7498/aps.43.289 Acta Physica Sinica 43 2 1994-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.43.289 289-296 //m.getgobooth.com/en/article/doi/10.7498/aps.43.297 Author(s): WANG XIAO-PING, ZHAO TE-XIU, JI HANG, LIANG QI, DONG YI <br/><p>The temperature coefficient of resistivity (TCR) of Pd thin film with different thicknesses and annealled at different tempertures has been investigated. The experi-mental results indicated that the TCR value of thin films is much smaller than that of bulk material and it also depcnds on grain size of the thin films. It was found that the TCR is higher for larger grain size. The result is explained readily by using the two-fluid model.</p> <br/>Acta Physica Sinica. 1994 43(2): 297-302. Published 1994-01-05 Author(s): WANG XIAO-PING, ZHAO TE-XIU, JI HANG, LIANG QI, DONG YI <br/><p>The temperature coefficient of resistivity (TCR) of Pd thin film with different thicknesses and annealled at different tempertures has been investigated. The experi-mental results indicated that the TCR value of thin films is much smaller than that of bulk material and it also depcnds on grain size of the thin films. It was found that the TCR is higher for larger grain size. The result is explained readily by using the two-fluid model.</p> <br/>Acta Physica Sinica. 1994 43(2): 297-302. Published 1994-01-05 EFFECT OF GRAIN SIZE ON TEMPERATURE COEFFICIENT OF RESISTIVITY OF Pd THIN FILMS WANG XIAO-PING, ZHAO TE-XIU, JI HANG, LIANG QI, DONG YI 1994-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1994 43(2): 297-302. article doi:10.7498/aps.43.297 10.7498/aps.43.297 Acta Physica Sinica 43 2 1994-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.43.297 297-302 //m.getgobooth.com/en/article/doi/10.7498/aps.43.303 Author(s): MAO ZHI-QIANG, ZHANG HONG-GUANG, TIAN MING-LIANG, YU WEI-JIE, TAN SHUN, WANG YU, XU CUN-YI, ZHANG YU-HENG <br/><p>The phonon vibration characteristics of the Bi2Sr2-xBaxCuOy (x=0, 0.2，0.4) single crystal samples was studied by using Raman scattering measurement. The exp-erimental results show that in the Raman spectra of the Bi2Sr2-xBaxCuOy system the typical phonon vibrational modes mainly appear in the frequency range of 196, 282-310, 460, 625 and 660cm-1, and the intensities of the 196, 282-310, 625, and 660 cm-1 lines enhance with increasing Ba content x. In previous work, we have studied the influence of Ba-doping on the incommensurate modulation structure of the 2201 phase. On the basis of those results, in this article we analyze the relation of the incommensurate modulation structure and phonon vibration characteristics emphatically, thus point out that the intensifying of the superstructure modulation (i.e. the decr-ease of modulation period) changes the symmetry of the unit cell seriously so that the phonon Raman activity of the unit cell varies obviously.</p> <br/>Acta Physica Sinica. 1994 43(2): 303-307. Published 1994-01-05 Author(s): MAO ZHI-QIANG, ZHANG HONG-GUANG, TIAN MING-LIANG, YU WEI-JIE, TAN SHUN, WANG YU, XU CUN-YI, ZHANG YU-HENG <br/><p>The phonon vibration characteristics of the Bi2Sr2-xBaxCuOy (x=0, 0.2，0.4) single crystal samples was studied by using Raman scattering measurement. The exp-erimental results show that in the Raman spectra of the Bi2Sr2-xBaxCuOy system the typical phonon vibrational modes mainly appear in the frequency range of 196, 282-310, 460, 625 and 660cm-1, and the intensities of the 196, 282-310, 625, and 660 cm-1 lines enhance with increasing Ba content x. In previous work, we have studied the influence of Ba-doping on the incommensurate modulation structure of the 2201 phase. On the basis of those results, in this article we analyze the relation of the incommensurate modulation structure and phonon vibration characteristics emphatically, thus point out that the intensifying of the superstructure modulation (i.e. the decr-ease of modulation period) changes the symmetry of the unit cell seriously so that the phonon Raman activity of the unit cell varies obviously.</p> <br/>Acta Physica Sinica. 1994 43(2): 303-307. Published 1994-01-05 A STUDY OF RAMAN SCATTERING IN Ba-DOPED Bi-Sr-Cu-O SINGLE CRYSTALS MAO ZHI-QIANG, ZHANG HONG-GUANG, TIAN MING-LIANG, YU WEI-JIE, TAN SHUN, WANG YU, XU CUN-YI, ZHANG YU-HENG 1994-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1994 43(2): 303-307. article doi:10.7498/aps.43.303 10.7498/aps.43.303 Acta Physica Sinica 43 2 1994-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.43.303 303-307 //m.getgobooth.com/en/article/doi/10.7498/aps.43.308 Author(s): YANG BEI-FANG, M. J. G. LEE, J. M. PERZ, XU CUN-YI, ZUO JIAN, WANG LIANG-BIN, RUAN YAO-ZHONG, ZHANG YU-HENG <br/><p>Ba-doping effects on the superconducting properties in the Bi2Sr2-xBaxCaCu2Oy single crystals (0≤x≤0.15) and polycrystalline samples (0≤x≤0.3) have been studied. The results show that Ba２＋ enters the superconducting phase with a solubi-lity limit. For 2212 phase single crystals, the length of c-axis and the supercondu-cting transition temperature Tc both increase with increasing Ba content. For slowly cooled sintered samples, Tc is significantly increased by Ba doping, whereas for quenched samples Tc is little affected. Changes in Tc with Ba doping have been explained by changes in the hole concentration.</p> <br/>Acta Physica Sinica. 1994 43(2): 308-314. Published 1994-01-05 Author(s): YANG BEI-FANG, M. J. G. LEE, J. M. PERZ, XU CUN-YI, ZUO JIAN, WANG LIANG-BIN, RUAN YAO-ZHONG, ZHANG YU-HENG <br/><p>Ba-doping effects on the superconducting properties in the Bi2Sr2-xBaxCaCu2Oy single crystals (0≤x≤0.15) and polycrystalline samples (0≤x≤0.3) have been studied. The results show that Ba２＋ enters the superconducting phase with a solubi-lity limit. For 2212 phase single crystals, the length of c-axis and the supercondu-cting transition temperature Tc both increase with increasing Ba content. For slowly cooled sintered samples, Tc is significantly increased by Ba doping, whereas for quenched samples Tc is little affected. Changes in Tc with Ba doping have been explained by changes in the hole concentration.</p> <br/>Acta Physica Sinica. 1994 43(2): 308-314. Published 1994-01-05 BARIUM-DOPING EFFECTS ON THE SUPERCONDUCTIVITY OF Bi2Sr2CaCu2Oy YANG BEI-FANG, M. J. G. LEE, J. M. PERZ, XU CUN-YI, ZUO JIAN, WANG LIANG-BIN, RUAN YAO-ZHONG, ZHANG YU-HENG 1994-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1994 43(2): 308-314. article doi:10.7498/aps.43.308 10.7498/aps.43.308 Acta Physica Sinica 43 2 1994-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.43.308 308-314 //m.getgobooth.com/en/article/doi/10.7498/aps.43.315 Author(s): MAO ZHI-QIANG, JI MING-RONG, TIAN MING-LIANG, ZHU JING-SHENG, ZHANG YU-HENG <br/><p>In this article, it is revealed that the Ba substitution intensifies the incommens-urate modulation of the Bi-2201 phase, namely the wavelengths of the modulation along b and c directions show obvious decrease. The study of superconductivity of the Ba-doped 2201 shows that the appropriate substitution of Ba for Sr (x≤0.2) can raise the Tc of 2201 phase, but as x exceeds 0.3, Tc decreases sharply, simult-aneously accompanied with the superconductor-insulator. transition In addition, the characteristic feature of electronic structure of the Ba-doped 2201 phase is also stu-died by use of the XPS and UPS spectra. Based on all these experimental resuits, the relation between incommensurate modulation structure, electronic structure and superconductivity for the Bi-2201 phase are discussed comprehensively, indicating that the replacement of Ba２＋ for Sr２＋ intensifies the mismatch between Bi-O layers and perovskite blocks. and the enhancement of this mismatch influences the symme-try of Cu-O2 planes seriously, just for this reason the variation of electronic state of Cu3d takes place (i.e. the degree of the coulomb correlation of the Cu3d electr-ons tends to be intensifled). In the process of Ba-doping, just due to the variation of Cu3d electrons, the 2201 phase undergoes a superconducting-insulating phase tran-sition.</p> <br/>Acta Physica Sinica. 1994 43(2): 315-321. Published 1994-01-05 Author(s): MAO ZHI-QIANG, JI MING-RONG, TIAN MING-LIANG, ZHU JING-SHENG, ZHANG YU-HENG <br/><p>In this article, it is revealed that the Ba substitution intensifies the incommens-urate modulation of the Bi-2201 phase, namely the wavelengths of the modulation along b and c directions show obvious decrease. The study of superconductivity of the Ba-doped 2201 shows that the appropriate substitution of Ba for Sr (x≤0.2) can raise the Tc of 2201 phase, but as x exceeds 0.3, Tc decreases sharply, simult-aneously accompanied with the superconductor-insulator. transition In addition, the characteristic feature of electronic structure of the Ba-doped 2201 phase is also stu-died by use of the XPS and UPS spectra. Based on all these experimental resuits, the relation between incommensurate modulation structure, electronic structure and superconductivity for the Bi-2201 phase are discussed comprehensively, indicating that the replacement of Ba２＋ for Sr２＋ intensifies the mismatch between Bi-O layers and perovskite blocks. and the enhancement of this mismatch influences the symme-try of Cu-O2 planes seriously, just for this reason the variation of electronic state of Cu3d takes place (i.e. the degree of the coulomb correlation of the Cu3d electr-ons tends to be intensifled). In the process of Ba-doping, just due to the variation of Cu3d electrons, the 2201 phase undergoes a superconducting-insulating phase tran-sition.</p> <br/>Acta Physica Sinica. 1994 43(2): 315-321. Published 1994-01-05 CORRELATION OF STRUCTURE AND PROPERTIES IN Ba-DOPED Bi-2201 PHASE MAO ZHI-QIANG, JI MING-RONG, TIAN MING-LIANG, ZHU JING-SHENG, ZHANG YU-HENG 1994-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1994 43(2): 315-321. article doi:10.7498/aps.43.315 10.7498/aps.43.315 Acta Physica Sinica 43 2 1994-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.43.315 315-321 //m.getgobooth.com/en/article/doi/10.7498/aps.43.322 Author(s): DU YOU-WET, YE YING, LU MU, JIAO HONG-ZHEN, JIN XIN, CHEN WAN-RONG <br/><p>The magnetocaloric effect of several ferrite specimens, with magnetoplumbite structure, spinel structure, garnet structure and perovskite structure respectirely, have been studied experimentally. The effect of substitution of non-magnetic ions on Cu-rie temperature and magnetic entropy are also reported.</p> <br/>Acta Physica Sinica. 1994 43(2): 322-326. Published 1994-01-05 Author(s): DU YOU-WET, YE YING, LU MU, JIAO HONG-ZHEN, JIN XIN, CHEN WAN-RONG <br/><p>The magnetocaloric effect of several ferrite specimens, with magnetoplumbite structure, spinel structure, garnet structure and perovskite structure respectirely, have been studied experimentally. The effect of substitution of non-magnetic ions on Cu-rie temperature and magnetic entropy are also reported.</p> <br/>Acta Physica Sinica. 1994 43(2): 322-326. Published 1994-01-05 A STUDY OF MAGNETOCALORIC EFFECT OF FERRITES DU YOU-WET, YE YING, LU MU, JIAO HONG-ZHEN, JIN XIN, CHEN WAN-RONG 1994-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1994 43(2): 322-326. article doi:10.7498/aps.43.322 10.7498/aps.43.322 Acta Physica Sinica 43 2 1994-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.43.322 322-326 //m.getgobooth.com/en/article/doi/10.7498/aps.43.327 Author(s): LIU FANG-XIN, ZHANG DAO-YUAN, WANG GEN-MIA0, LI YU-ZHI, YANG YUAN-ZHENG, DONG YUAN-DA <br/><p>Several samples of Cu1-xSnx series were obtained by mechanical alloying, including η-Cu6Sn5 alloy which are difficult to prepare by melting method. XRD results show that the solid solution with nanometer size is formed which including definite alloy phase in each ball milling sample. M?ssbauer spectra indicate that the Sn-rich-phase and the Cu-rich phase exist besides the alloy phase. We suggest that in the process of the ball milling, the crystallites of Cu and Sn are nanometerized, at first, and then the interdiffusion of the two kinds of atoms takes place and finally the solid solution is formed including the alloy phase, the α-Sn-rich phase and the fcc-Cu-rich phase.</p> <br/>Acta Physica Sinica. 1994 43(2): 327-331. Published 1994-01-05 Author(s): LIU FANG-XIN, ZHANG DAO-YUAN, WANG GEN-MIA0, LI YU-ZHI, YANG YUAN-ZHENG, DONG YUAN-DA <br/><p>Several samples of Cu1-xSnx series were obtained by mechanical alloying, including η-Cu6Sn5 alloy which are difficult to prepare by melting method. XRD results show that the solid solution with nanometer size is formed which including definite alloy phase in each ball milling sample. M?ssbauer spectra indicate that the Sn-rich-phase and the Cu-rich phase exist besides the alloy phase. We suggest that in the process of the ball milling, the crystallites of Cu and Sn are nanometerized, at first, and then the interdiffusion of the two kinds of atoms takes place and finally the solid solution is formed including the alloy phase, the α-Sn-rich phase and the fcc-Cu-rich phase.</p> <br/>Acta Physica Sinica. 1994 43(2): 327-331. Published 1994-01-05 M?SSBAUER STUDY OF MECHANICALLY ALLOYED Cu1-xSnx SERIES LIU FANG-XIN, ZHANG DAO-YUAN, WANG GEN-MIA0, LI YU-ZHI, YANG YUAN-ZHENG, DONG YUAN-DA 1994-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1994 43(2): 327-331. article doi:10.7498/aps.43.327 10.7498/aps.43.327 Acta Physica Sinica 43 2 1994-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.43.327 327-331 //m.getgobooth.com/en/article/doi/10.7498/aps.43.332 Author(s): LIU YAN-ZHANG, FAN XI-QING <br/><p>The infrared divergence response theory is applied to reorientational relaxation process of Al3+-hole in α-quartz containing Al impurity to study the behaviour of low temperature dielectric relaxation loss properties in this system. Our calculation results showed that the single phononassisted tunneling process makes the main contribution to the dielectric loss for T10 K, the thermally activated relaxation process dominates the dielectric loss; as for 6.5 K &lt; T&lt;10 K, the dielectric loss is the superposition of the two relaxation process. It is pointed out that for the same relaxation unit, different relaxation process may have different infrared divergence response. The ultrasonic relaxation loss properties induced by the same relaxation unit is also discussed.</p> <br/>Acta Physica Sinica. 1994 43(2): 332-339. Published 1994-01-05 Author(s): LIU YAN-ZHANG, FAN XI-QING <br/><p>The infrared divergence response theory is applied to reorientational relaxation process of Al3+-hole in α-quartz containing Al impurity to study the behaviour of low temperature dielectric relaxation loss properties in this system. Our calculation results showed that the single phononassisted tunneling process makes the main contribution to the dielectric loss for T10 K, the thermally activated relaxation process dominates the dielectric loss; as for 6.5 K &lt; T&lt;10 K, the dielectric loss is the superposition of the two relaxation process. It is pointed out that for the same relaxation unit, different relaxation process may have different infrared divergence response. The ultrasonic relaxation loss properties induced by the same relaxation unit is also discussed.</p> <br/>Acta Physica Sinica. 1994 43(2): 332-339. Published 1994-01-05 INFRARED DIVERGENCE RESPONSE IN REORIENTATIONAL RELAXATION PROCESS OF Al3+-HOLE IN α QUARTZ LIU YAN-ZHANG, FAN XI-QING 1994-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1994 43(2): 332-339. article doi:10.7498/aps.43.332 10.7498/aps.43.332 Acta Physica Sinica 43 2 1994-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.43.332 332-339 //m.getgobooth.com/en/article/doi/10.7498/aps.43.340 Author(s): REN MENG-MEI, JIANG WEI-LIN, ZHU PEI-RAN <br/><p>In this paper, a technique of proton elastic backscattering (EBS) in the energy range of 1.5-2.5MeV is proposed for the measurement of the total contents of oxy-gen in the films. The accuracy is better than 5% for the film thickness between less than hundreds nm to a few microns.</p> <br/>Acta Physica Sinica. 1994 43(2): 340-344. Published 1994-01-05 Author(s): REN MENG-MEI, JIANG WEI-LIN, ZHU PEI-RAN <br/><p>In this paper, a technique of proton elastic backscattering (EBS) in the energy range of 1.5-2.5MeV is proposed for the measurement of the total contents of oxy-gen in the films. The accuracy is better than 5% for the film thickness between less than hundreds nm to a few microns.</p> <br/>Acta Physica Sinica. 1994 43(2): 340-344. Published 1994-01-05 COMPOSITION ANALYSIS AND OXYGEN CONTENT DETERMINATION OF HIGH T SUPERCONDUCTING FILMS BY RBS AND EBS METHODS REN MENG-MEI, JIANG WEI-LIN, ZHU PEI-RAN 1994-01-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1994 43(2): 340-344. article doi:10.7498/aps.43.340 10.7498/aps.43.340 Acta Physica Sinica 43 2 1994-01-05 //m.getgobooth.com/en/article/doi/10.7498/aps.43.340 340-344