Acta Physica Sinica //www.getgobooth.com/ 必威体育下载 daily 15 2024-08-20 10:33:39 apsoffice@iphy.ac.cn apsoffice@iphy.ac.cn 2024-08-20 10:33:39 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 <![CDATA[ROLE OF SILVER COLLOIDAL PARTICLES IN Ag-O-Cs PHOTOCATHODE]]> //www.getgobooth.com/en/article/doi/10.7498/aps.28.1-2 Author(s): WU QUAN-DE <br/><p>Since the discovery of Ag-O-Cs photocathode, its mechanism of photoemission has remained enigmatic. The role of silver colloidal particles is important for the explana-tion of photoemission in long wavelength region. This paper presents a general review of the role of silver colloidal particles in the literatures, such as experiments by Лахомов et al. We come to a conclusion that the photoelectric emission of Ag-O-Cs photocathode above 4000? comes from small silver colloidal particles in the film of Cs2O.</p> <br/>Acta Physica Sinica. 1979 28(5): 1-9. Published 2005-07-30 Author(s): WU QUAN-DE <br/><p>Since the discovery of Ag-O-Cs photocathode, its mechanism of photoemission has remained enigmatic. The role of silver colloidal particles is important for the explana-tion of photoemission in long wavelength region. This paper presents a general review of the role of silver colloidal particles in the literatures, such as experiments by Лахомов et al. We come to a conclusion that the photoelectric emission of Ag-O-Cs photocathode above 4000? comes from small silver colloidal particles in the film of Cs2O.</p> <br/>Acta Physica Sinica. 1979 28(5): 1-9. Published 2005-07-30 ROLE OF SILVER COLLOIDAL PARTICLES IN Ag-O-Cs PHOTOCATHODE WU QUAN-DE 2005-07-30 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1979 28(5): 1-9. article doi:10.7498/aps.28.1-2 10.7498/aps.28.1-2 Acta Physica Sinica 28 5 2005-07-30 //www.getgobooth.com/en/article/doi/10.7498/aps.28.1-2 1-9 <![CDATA[LONG WAVELENGTH RESPONSE OF Ag-O-Cs PHOTOCATHODE AND SMALL COLLOIDAL PARTICLES]]> //www.getgobooth.com/en/article/doi/10.7498/aps.28.10 Author(s): WU QUAN-DE <br/><p>In this paper, the rule of photoemission from the small silver colloidal particles in the film of Cs2O is discussed, and the formulas of energy distribution of photoelectrons, photoelectric current and quantum yield are derived. The theoretical curves of energy distribution of photoelectrons, long wavelength response and quantum yield of Ag-O-Cs photocathode are compared with experimental results. It is found that for the long wavelength response the equivalent diameters of small colloidal particles are about 31?.The problems of the treatment of Cs, the additional silvering process and the ques-tion about Fowler curve are also discussed and explained.</p> <br/>Acta Physica Sinica. 1979 28(5): 10-23. Published 2005-07-30 Author(s): WU QUAN-DE <br/><p>In this paper, the rule of photoemission from the small silver colloidal particles in the film of Cs2O is discussed, and the formulas of energy distribution of photoelectrons, photoelectric current and quantum yield are derived. The theoretical curves of energy distribution of photoelectrons, long wavelength response and quantum yield of Ag-O-Cs photocathode are compared with experimental results. It is found that for the long wavelength response the equivalent diameters of small colloidal particles are about 31?.The problems of the treatment of Cs, the additional silvering process and the ques-tion about Fowler curve are also discussed and explained.</p> <br/>Acta Physica Sinica. 1979 28(5): 10-23. Published 2005-07-30 LONG WAVELENGTH RESPONSE OF Ag-O-Cs PHOTOCATHODE AND SMALL COLLOIDAL PARTICLES WU QUAN-DE 2005-07-30 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1979 28(5): 10-23. article doi:10.7498/aps.28.10 10.7498/aps.28.10 Acta Physica Sinica 28 5 2005-07-30 //www.getgobooth.com/en/article/doi/10.7498/aps.28.10 10-23 <![CDATA[ELECTRO-OPTIC FREQUENCY SHIFT OF 10.6μm CO<sub<2</sub< LASER LINE]]> //www.getgobooth.com/en/article/doi/10.7498/aps.28.24 Author(s): FU EN-SHENG, WANG YU-MIN, CHENG ZHAO-GU, DOU AI-RONG <br/><p>This paper presents a scheme for electro-optic frequency shifting. In this scheme linearly polarized light of output from CO2 laser passes through a electro-optic modula-tor and retroaction-cycle laser amplifer, under the condition of no increased harmonic components exist, the convertion efficiency of the shifting can be raised greatly. This work suggests that electro-optic frequency shifting possesses potentiality of wide appli-cation. In the experiments on checking the effect of the frequency shifting, the experi-mental device is simplifed by auto-collmating round-trip of the light beam and space delaying the modulated signal. The frequency components of the frequency shifted light is analysed by using simple method of frequency beating.</p> <br/>Acta Physica Sinica. 1979 28(5): 24-31. Published 2005-07-30 Author(s): FU EN-SHENG, WANG YU-MIN, CHENG ZHAO-GU, DOU AI-RONG <br/><p>This paper presents a scheme for electro-optic frequency shifting. In this scheme linearly polarized light of output from CO2 laser passes through a electro-optic modula-tor and retroaction-cycle laser amplifer, under the condition of no increased harmonic components exist, the convertion efficiency of the shifting can be raised greatly. This work suggests that electro-optic frequency shifting possesses potentiality of wide appli-cation. In the experiments on checking the effect of the frequency shifting, the experi-mental device is simplifed by auto-collmating round-trip of the light beam and space delaying the modulated signal. The frequency components of the frequency shifted light is analysed by using simple method of frequency beating.</p> <br/>Acta Physica Sinica. 1979 28(5): 24-31. Published 2005-07-30 ELECTRO-OPTIC FREQUENCY SHIFT OF 10.6μm CO&lt;sub&lt;2&lt;/sub&lt; LASER LINE FU EN-SHENG, WANG YU-MIN, CHENG ZHAO-GU, DOU AI-RONG 2005-07-30 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1979 28(5): 24-31. article doi:10.7498/aps.28.24 10.7498/aps.28.24 Acta Physica Sinica 28 5 2005-07-30 //www.getgobooth.com/en/article/doi/10.7498/aps.28.24 24-31 <![CDATA[A THREE-PHOTON VECTOR MODEL]]> //www.getgobooth.com/en/article/doi/10.7498/aps.28.32 Author(s): YE PEI-XIAN <br/><p>It is shown that the optical Eabi precession model developed by Feynman, Vernon and Hellwarth for two-level systems can be extended not only to discuss the two-photon resonant coherent interaction, but also to the case of three photons. Using this model and the adiabatic following approximation, the third-order polarization expression in an intense and (or) resonant optical field is obtained, which differs from that obtained by perturbation theory. The saturation phenomena in the third-order resonant non-linear effects are also discussed.</p> <br/>Acta Physica Sinica. 1979 28(5): 32-39. Published 2005-07-30 Author(s): YE PEI-XIAN <br/><p>It is shown that the optical Eabi precession model developed by Feynman, Vernon and Hellwarth for two-level systems can be extended not only to discuss the two-photon resonant coherent interaction, but also to the case of three photons. Using this model and the adiabatic following approximation, the third-order polarization expression in an intense and (or) resonant optical field is obtained, which differs from that obtained by perturbation theory. The saturation phenomena in the third-order resonant non-linear effects are also discussed.</p> <br/>Acta Physica Sinica. 1979 28(5): 32-39. Published 2005-07-30 A THREE-PHOTON VECTOR MODEL YE PEI-XIAN 2005-07-30 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1979 28(5): 32-39. article doi:10.7498/aps.28.32 10.7498/aps.28.32 Acta Physica Sinica 28 5 2005-07-30 //www.getgobooth.com/en/article/doi/10.7498/aps.28.32 32-39 <![CDATA[AN EMPIRICAL RULE FOR SUPERCONDUCTING A-15 TYPE COMPOUNDS]]> //www.getgobooth.com/en/article/doi/10.7498/aps.28.40-2 Author(s): LUO QI-GUANG <br/><p>A diagram which not only considers the transition of the structural type hut also describes the rule of change of Tc in the A-15 compounds is given in this paper. From this diagram it can be seen that compounds with very high Tc(&lt;25K) are not likely to exist in the A-15 series considered. In the Nb series, Nb3Ge probably has the highest Tc; in V series, the Tc can still be expected to be raised (&lt;17.1K), the Tc of V3Ge is likely to be raised to above 12 K. Examining the case of Nb3Si, one can not get the optimistic estimation as that of Geller. It is considered that Nb3Si of A-15 type obtained by present new technology is a non-ideal structure formed at the expense of the normal stoichiometric ratio or by a change of the ordinary atomic volume. On the basis of the relationship between Tc and radii ratio and on consideration of the radii ratio required by the ideal A-15 structure, the point of view presented in this paper does not agree with the various predictions that the Nb3Si might have a high Tc(&lt;23 K).</p> <br/>Acta Physica Sinica. 1979 28(5): 40-47. Published 2005-07-30 Author(s): LUO QI-GUANG <br/><p>A diagram which not only considers the transition of the structural type hut also describes the rule of change of Tc in the A-15 compounds is given in this paper. From this diagram it can be seen that compounds with very high Tc(&lt;25K) are not likely to exist in the A-15 series considered. In the Nb series, Nb3Ge probably has the highest Tc; in V series, the Tc can still be expected to be raised (&lt;17.1K), the Tc of V3Ge is likely to be raised to above 12 K. Examining the case of Nb3Si, one can not get the optimistic estimation as that of Geller. It is considered that Nb3Si of A-15 type obtained by present new technology is a non-ideal structure formed at the expense of the normal stoichiometric ratio or by a change of the ordinary atomic volume. On the basis of the relationship between Tc and radii ratio and on consideration of the radii ratio required by the ideal A-15 structure, the point of view presented in this paper does not agree with the various predictions that the Nb3Si might have a high Tc(&lt;23 K).</p> <br/>Acta Physica Sinica. 1979 28(5): 40-47. Published 2005-07-30 AN EMPIRICAL RULE FOR SUPERCONDUCTING A-15 TYPE COMPOUNDS LUO QI-GUANG 2005-07-30 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1979 28(5): 40-47. article doi:10.7498/aps.28.40-2 10.7498/aps.28.40-2 Acta Physica Sinica 28 5 2005-07-30 //www.getgobooth.com/en/article/doi/10.7498/aps.28.40-2 40-47 <![CDATA[AN APPROXIMATE HAMILTONIAN OF SUPERCONDUCTOR TUNNELING SYSTEM TREATED BY VARIATIONAL METHOD]]> //www.getgobooth.com/en/article/doi/10.7498/aps.28.48 Author(s): WANG ZHENG-XING <br/><p>The variational approximation method developed by Bogolyubov et al. is generalized to treat the dynamical problems of superconductor tunneling system, which results in establishing the approximate expressions, in second quantization representation, for the equation of motion, the. Hamiltonian of superconductor tunneling system and the operators of tunneling current in this variational approximation scheme. The Hamil-tonian obtained, H = HL + HR + HT + WT, consists of three parts: HL describes the behaviours of the metal on the left hand side of the sample; while HR the behaviours of the metal on the right hand side; and HT+WT the coupling between them. HL and HR are commutable with each other, and their expressions are the same as two isolating metals, except that the states of single electron are slightly mixed. The formula of matrix elements of HT is identical with that of Bardeen. The effect of WT is approxi-mately 10000 times less than that of HT, hence WT may be neglected. It is demonstra-ted that as far as the first order terms in our variational approximation method is con-cerned, the model Hamiltonian assumed by Cohen et al. applies, while Prange's treat-ment for this problem is proved to be inappropriate.</p> <br/>Acta Physica Sinica. 1979 28(5): 48-58. Published 2005-07-30 Author(s): WANG ZHENG-XING <br/><p>The variational approximation method developed by Bogolyubov et al. is generalized to treat the dynamical problems of superconductor tunneling system, which results in establishing the approximate expressions, in second quantization representation, for the equation of motion, the. Hamiltonian of superconductor tunneling system and the operators of tunneling current in this variational approximation scheme. The Hamil-tonian obtained, H = HL + HR + HT + WT, consists of three parts: HL describes the behaviours of the metal on the left hand side of the sample; while HR the behaviours of the metal on the right hand side; and HT+WT the coupling between them. HL and HR are commutable with each other, and their expressions are the same as two isolating metals, except that the states of single electron are slightly mixed. The formula of matrix elements of HT is identical with that of Bardeen. The effect of WT is approxi-mately 10000 times less than that of HT, hence WT may be neglected. It is demonstra-ted that as far as the first order terms in our variational approximation method is con-cerned, the model Hamiltonian assumed by Cohen et al. applies, while Prange's treat-ment for this problem is proved to be inappropriate.</p> <br/>Acta Physica Sinica. 1979 28(5): 48-58. Published 2005-07-30 AN APPROXIMATE HAMILTONIAN OF SUPERCONDUCTOR TUNNELING SYSTEM TREATED BY VARIATIONAL METHOD WANG ZHENG-XING 2005-07-30 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1979 28(5): 48-58. article doi:10.7498/aps.28.48 10.7498/aps.28.48 Acta Physica Sinica 28 5 2005-07-30 //www.getgobooth.com/en/article/doi/10.7498/aps.28.48 48-58 <![CDATA[THE DIFFRACTION AT A STRAIGHT EDGE IN OPTICAL SYSTEM WITH ABERRATION UNDER PARTIALLY COHERENT ILLUMINATION]]> //www.getgobooth.com/en/article/doi/10.7498/aps.28.59 Author(s): ZHUANG SONG-LIN, CHEN XIANG-ZHEN <br/><p>This paper deals theoretically with the influences of various kinds of mutual co-herence function and the degree of coherence on the distribution of straight-edge generated image field. Indicating the close connections between the illuminating con-dition and image formation, we thus obtain the reliable method to select the optimal illuminating condition. Based on our theoretical calculation on optical system with aberration, it is shown that the radial intensity distribution of the straight-edge generated imagery can reflect sensitively the quality of the optical system. This can be adopted as the quality criterion for practical optical system under partially cohe-rent illumination.</p> <br/>Acta Physica Sinica. 1979 28(5): 59-71. Published 2005-07-30 Author(s): ZHUANG SONG-LIN, CHEN XIANG-ZHEN <br/><p>This paper deals theoretically with the influences of various kinds of mutual co-herence function and the degree of coherence on the distribution of straight-edge generated image field. Indicating the close connections between the illuminating con-dition and image formation, we thus obtain the reliable method to select the optimal illuminating condition. Based on our theoretical calculation on optical system with aberration, it is shown that the radial intensity distribution of the straight-edge generated imagery can reflect sensitively the quality of the optical system. This can be adopted as the quality criterion for practical optical system under partially cohe-rent illumination.</p> <br/>Acta Physica Sinica. 1979 28(5): 59-71. Published 2005-07-30 THE DIFFRACTION AT A STRAIGHT EDGE IN OPTICAL SYSTEM WITH ABERRATION UNDER PARTIALLY COHERENT ILLUMINATION ZHUANG SONG-LIN, CHEN XIANG-ZHEN 2005-07-30 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1979 28(5): 59-71. article doi:10.7498/aps.28.59 10.7498/aps.28.59 Acta Physica Sinica 28 5 2005-07-30 //www.getgobooth.com/en/article/doi/10.7498/aps.28.59 59-71 <![CDATA[THE SPECTRUM OF NIII IN THE VACUUM ULTRAVIOLET REGION]]> //www.getgobooth.com/en/article/doi/10.7498/aps.28.72 Author(s): WANG WEN-SHU, CHAO JIN-SEN, TAO SHI-YAO <br/><p>The spectrum of NIII has been studied in the region of 2000-680? by using a two meter normal incidence vacuum spectrograph and a condensed discharge as light source. Experimental results indicate the evident effect of the pressure of light source on the appearance of NIII spectral lines. Thirty-one new spectral lines are observed. A new energy level, 2s2p4d2D5/2, is found, and the energy value of the level 2s2p4d2D3/2 is revised.</p> <br/>Acta Physica Sinica. 1979 28(5): 72-76. Published 2005-07-30 Author(s): WANG WEN-SHU, CHAO JIN-SEN, TAO SHI-YAO <br/><p>The spectrum of NIII has been studied in the region of 2000-680? by using a two meter normal incidence vacuum spectrograph and a condensed discharge as light source. Experimental results indicate the evident effect of the pressure of light source on the appearance of NIII spectral lines. Thirty-one new spectral lines are observed. A new energy level, 2s2p4d2D5/2, is found, and the energy value of the level 2s2p4d2D3/2 is revised.</p> <br/>Acta Physica Sinica. 1979 28(5): 72-76. Published 2005-07-30 THE SPECTRUM OF NIII IN THE VACUUM ULTRAVIOLET REGION WANG WEN-SHU, CHAO JIN-SEN, TAO SHI-YAO 2005-07-30 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1979 28(5): 72-76. article doi:10.7498/aps.28.72 10.7498/aps.28.72 Acta Physica Sinica 28 5 2005-07-30 //www.getgobooth.com/en/article/doi/10.7498/aps.28.72 72-76 <![CDATA[REDUCED HUGONIOT CURVE AND EQUATION OF STATE OF METALS UNDER HIGH-PRESSURES]]> //www.getgobooth.com/en/article/doi/10.7498/aps.28.77 Author(s): GAO WEN-BIN <br/><p>In this article, through summarizing experimental data of shock-wave compression for thirty-four metallic elements, we have obtained a generally applicable empirical expression for the reduced Hugoniot curve, which describes the law of shock-wave compressions for metallic elements. In treating these data, the principle of corresponding state was employed. By utilizing the obtained reduced Hugoniot curve and basing on the Debye theory, we have derived a generally applicable equation of state for metallic elements under high pressures. We used this equation of state to calculate the pressure-compression curves for fifteen metallic elements (magnesium, iron, copper, etc). The comparison shows that the calculated values are in good agreement with experimental data.</p> <br/>Acta Physica Sinica. 1979 28(5): 77-85. Published 2005-07-30 Author(s): GAO WEN-BIN <br/><p>In this article, through summarizing experimental data of shock-wave compression for thirty-four metallic elements, we have obtained a generally applicable empirical expression for the reduced Hugoniot curve, which describes the law of shock-wave compressions for metallic elements. In treating these data, the principle of corresponding state was employed. By utilizing the obtained reduced Hugoniot curve and basing on the Debye theory, we have derived a generally applicable equation of state for metallic elements under high pressures. We used this equation of state to calculate the pressure-compression curves for fifteen metallic elements (magnesium, iron, copper, etc). The comparison shows that the calculated values are in good agreement with experimental data.</p> <br/>Acta Physica Sinica. 1979 28(5): 77-85. Published 2005-07-30 REDUCED HUGONIOT CURVE AND EQUATION OF STATE OF METALS UNDER HIGH-PRESSURES GAO WEN-BIN 2005-07-30 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1979 28(5): 77-85. article doi:10.7498/aps.28.77 10.7498/aps.28.77 Acta Physica Sinica 28 5 2005-07-30 //www.getgobooth.com/en/article/doi/10.7498/aps.28.77 77-85 <![CDATA[A STUDY OF PROTON IMPLANTATION FOR GaAs]]> //www.getgobooth.com/en/article/doi/10.7498/aps.28.86 Author(s): WANG WEI-YUAN, XU JING-YANG, NI QI-MIN, TAN RU-HUAN, LIU YUE-QIN, QIU YUE-YING <br/><p>In this paper, a study has been made of proton implantation and annealing behavior of GaAs. The single crystal wafers used in the implantation were oriented typically at 1-3° away from (100), and doped with Sn to 5×1017-1×1018cm-3. The implantation was carried out at room temperature in a proton accelerator and ion implantation machine with an energy of 8×104-2×106eV. Following bombardment, the implanted area was delineated by means of an A-B etchant, and the penetration depth of proton xj was determined. The xj values obtained can be related to the implantation energy E as follows xj= (8.716×10-4+4E-1)E1.365,where Xj is in ?, E in eV. The maximum lateral spread of the proton XL as a function of energy was also, determined, and found to be ~104? when E&lt;3×105eV. The proton implanted samples were annealed at 150-800℃ for 5 min. A X-ray double crystal difractrometer was used to characterize the recovery of strain, and a electrometer was used to determine the resistance variation with annealing temperature. The results showed that the critical dose φ* for amorphous layer formation after proton implantation was ~1016cm-2, and the recovery of strain began at 150°, and virtually stopped at 450°. In the temperature range 150-450°, there were no significant variation in implanted resistance. The recovery of resistance oecurred only at higher temperatures. The project range of proton Rp, the electron stopping power Se(E), the nuclear stopping power Sn(E), and the mechanism of annealing of implanted proton in GaAs are discussed on the basis of the present experimental results.</p> <br/>Acta Physica Sinica. 1979 28(5): 86-95. Published 2005-07-30 Author(s): WANG WEI-YUAN, XU JING-YANG, NI QI-MIN, TAN RU-HUAN, LIU YUE-QIN, QIU YUE-YING <br/><p>In this paper, a study has been made of proton implantation and annealing behavior of GaAs. The single crystal wafers used in the implantation were oriented typically at 1-3° away from (100), and doped with Sn to 5×1017-1×1018cm-3. The implantation was carried out at room temperature in a proton accelerator and ion implantation machine with an energy of 8×104-2×106eV. Following bombardment, the implanted area was delineated by means of an A-B etchant, and the penetration depth of proton xj was determined. The xj values obtained can be related to the implantation energy E as follows xj= (8.716×10-4+4E-1)E1.365,where Xj is in ?, E in eV. The maximum lateral spread of the proton XL as a function of energy was also, determined, and found to be ~104? when E&lt;3×105eV. The proton implanted samples were annealed at 150-800℃ for 5 min. A X-ray double crystal difractrometer was used to characterize the recovery of strain, and a electrometer was used to determine the resistance variation with annealing temperature. The results showed that the critical dose φ* for amorphous layer formation after proton implantation was ~1016cm-2, and the recovery of strain began at 150°, and virtually stopped at 450°. In the temperature range 150-450°, there were no significant variation in implanted resistance. The recovery of resistance oecurred only at higher temperatures. The project range of proton Rp, the electron stopping power Se(E), the nuclear stopping power Sn(E), and the mechanism of annealing of implanted proton in GaAs are discussed on the basis of the present experimental results.</p> <br/>Acta Physica Sinica. 1979 28(5): 86-95. Published 2005-07-30 A STUDY OF PROTON IMPLANTATION FOR GaAs WANG WEI-YUAN, XU JING-YANG, NI QI-MIN, TAN RU-HUAN, LIU YUE-QIN, QIU YUE-YING 2005-07-30 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1979 28(5): 86-95. article doi:10.7498/aps.28.86 10.7498/aps.28.86 Acta Physica Sinica 28 5 2005-07-30 //www.getgobooth.com/en/article/doi/10.7498/aps.28.86 86-95 <![CDATA[THEORETICAL INTERPRETATION OF THE ENHANCEMENT OF NEUTRON DIFFRACTION IN AN α-LiIO<sub<3</sub< SINGLE CRYSTAL UNDER THE ACTION OF A DC FIELD]]> //www.getgobooth.com/en/article/doi/10.7498/aps.28.96 Author(s): XU ZHENG-YI, LI TIE-CHENG, GU BEN-YUAN <br/><p>We have noticed in α-LiIO3 single crystals the following experimental facts: (1) Using the conoscopic observation method, it was found the contrast of layer imperfections increasing with the strength of a dc field. (2) Changes take place in the x-ray topography under the action of a dc field. (3) The grown-in spatial variation of lattice parameters were found and measured by an x-ray double-crystal spectrometer. Based on these observations, we infer that space charges (carriers, impurity ions and vacancies) are accumulated at the defects of macroscopic scale, which in turn produces a gradient of lattice parameters under the action of a dc field. We calculated the neutron Bragg scattering cross section for a distorted single crystal using the Born approximation and taking into account the extinction at the same time. Therefrom, the enhancement of diffraction in an α-LiIO3 crystal under the action of a dc field were qualitatively interpreted with good agreement.</p> <br/>Acta Physica Sinica. 1979 28(5): 96-106. Published 2005-07-30 Author(s): XU ZHENG-YI, LI TIE-CHENG, GU BEN-YUAN <br/><p>We have noticed in α-LiIO3 single crystals the following experimental facts: (1) Using the conoscopic observation method, it was found the contrast of layer imperfections increasing with the strength of a dc field. (2) Changes take place in the x-ray topography under the action of a dc field. (3) The grown-in spatial variation of lattice parameters were found and measured by an x-ray double-crystal spectrometer. Based on these observations, we infer that space charges (carriers, impurity ions and vacancies) are accumulated at the defects of macroscopic scale, which in turn produces a gradient of lattice parameters under the action of a dc field. We calculated the neutron Bragg scattering cross section for a distorted single crystal using the Born approximation and taking into account the extinction at the same time. Therefrom, the enhancement of diffraction in an α-LiIO3 crystal under the action of a dc field were qualitatively interpreted with good agreement.</p> <br/>Acta Physica Sinica. 1979 28(5): 96-106. Published 2005-07-30 THEORETICAL INTERPRETATION OF THE ENHANCEMENT OF NEUTRON DIFFRACTION IN AN α-LiIO&lt;sub&lt;3&lt;/sub&lt; SINGLE CRYSTAL UNDER THE ACTION OF A DC FIELD XU ZHENG-YI, LI TIE-CHENG, GU BEN-YUAN 2005-07-30 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1979 28(5): 96-106. article doi:10.7498/aps.28.96 10.7498/aps.28.96 Acta Physica Sinica 28 5 2005-07-30 //www.getgobooth.com/en/article/doi/10.7498/aps.28.96 96-106 <![CDATA[A STUDY ON GROWTH CONDITION OF FeOOH (Ⅰ)]]> //www.getgobooth.com/en/article/doi/10.7498/aps.28.107 Author(s): DU YOU-WEI, LI ZHENG-YU, LU HUAI-XIAN, GU BEN-XI, WANG GUI-QIN <br/><p>This paper describes the growth condition of PeOOH in the solution of ferrous sulphate with NaOH or NH4OH as precipitant. The crystal forms were observed with electron microscope. The phase composition and phase boundaries were determined by X-ray diffraction. When the precipitant is NH4OH or NaOH, the two phase diagrams of the FeOOH growth in the acid region are similar, but in the alkaline region they are different.</p> <br/>Acta Physica Sinica. 1979 28(5): 107-113. Published 2005-07-30 Author(s): DU YOU-WEI, LI ZHENG-YU, LU HUAI-XIAN, GU BEN-XI, WANG GUI-QIN <br/><p>This paper describes the growth condition of PeOOH in the solution of ferrous sulphate with NaOH or NH4OH as precipitant. The crystal forms were observed with electron microscope. The phase composition and phase boundaries were determined by X-ray diffraction. When the precipitant is NH4OH or NaOH, the two phase diagrams of the FeOOH growth in the acid region are similar, but in the alkaline region they are different.</p> <br/>Acta Physica Sinica. 1979 28(5): 107-113. Published 2005-07-30 A STUDY ON GROWTH CONDITION OF FeOOH (Ⅰ) DU YOU-WEI, LI ZHENG-YU, LU HUAI-XIAN, GU BEN-XI, WANG GUI-QIN 2005-07-30 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1979 28(5): 107-113. article doi:10.7498/aps.28.107 10.7498/aps.28.107 Acta Physica Sinica 28 5 2005-07-30 //www.getgobooth.com/en/article/doi/10.7498/aps.28.107 107-113 <![CDATA[MAGNETIC FIELD DESIGN FOR A LARGE TOKAMAK]]> //www.getgobooth.com/en/article/doi/10.7498/aps.28.114 Author(s): YU GUO-YANG, CHEN JUN-BENG, HUO YU-PING <br/><p>This artiele is the summary of the methods of the magnetic field design of the CT-8 Takamak. We analized the influence of all kinds of stray field on the equilibrium of the plasma tour, and discussed the requirement which should be satisfied by the magnetic field (especially, stray field) and developed a optimization method. We also analized the possibility to maintain the equilibrium in the process of temperature raising.</p> <br/>Acta Physica Sinica. 1979 28(5): 114-123. Published 2005-07-30 Author(s): YU GUO-YANG, CHEN JUN-BENG, HUO YU-PING <br/><p>This artiele is the summary of the methods of the magnetic field design of the CT-8 Takamak. We analized the influence of all kinds of stray field on the equilibrium of the plasma tour, and discussed the requirement which should be satisfied by the magnetic field (especially, stray field) and developed a optimization method. We also analized the possibility to maintain the equilibrium in the process of temperature raising.</p> <br/>Acta Physica Sinica. 1979 28(5): 114-123. Published 2005-07-30 MAGNETIC FIELD DESIGN FOR A LARGE TOKAMAK YU GUO-YANG, CHEN JUN-BENG, HUO YU-PING 2005-07-30 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1979 28(5): 114-123. article doi:10.7498/aps.28.114 10.7498/aps.28.114 Acta Physica Sinica 28 5 2005-07-30 //www.getgobooth.com/en/article/doi/10.7498/aps.28.114 114-123 <![CDATA[PHASE MODULATION IN ATOMIC RESONANCE]]> //www.getgobooth.com/en/article/doi/10.7498/aps.28.124 Author(s): LIAO SHI-QIANG <br/><p></p> <br/>Acta Physica Sinica. 1979 28(5): 124-128. Published 2005-07-30 Author(s): LIAO SHI-QIANG <br/><p></p> <br/>Acta Physica Sinica. 1979 28(5): 124-128. Published 2005-07-30 PHASE MODULATION IN ATOMIC RESONANCE LIAO SHI-QIANG 2005-07-30 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1979 28(5): 124-128. article doi:10.7498/aps.28.124 10.7498/aps.28.124 Acta Physica Sinica 28 5 2005-07-30 //www.getgobooth.com/en/article/doi/10.7498/aps.28.124 124-128 <![CDATA[NEUTRON DIFFRACTION STUDY OF THE COMPOUNDS Y(Co<sub<1-x</sub<Cu<sub<x</sub<)<sub<5</sub<]]> //www.getgobooth.com/en/article/doi/10.7498/aps.28.129 Author(s): YANG YING-CHANG, HE WEN-WANG, YANG JI-LIAN, ZHU JIA-XUAN, ZENG XIANG-XIN, JIN LAN <br/><p></p> <br/>Acta Physica Sinica. 1979 28(5): 129-134. Published 2005-07-30 Author(s): YANG YING-CHANG, HE WEN-WANG, YANG JI-LIAN, ZHU JIA-XUAN, ZENG XIANG-XIN, JIN LAN <br/><p></p> <br/>Acta Physica Sinica. 1979 28(5): 129-134. Published 2005-07-30 NEUTRON DIFFRACTION STUDY OF THE COMPOUNDS Y(Co&lt;sub&lt;1-x&lt;/sub&lt;Cu&lt;sub&lt;x&lt;/sub&lt;)&lt;sub&lt;5&lt;/sub&lt; YANG YING-CHANG, HE WEN-WANG, YANG JI-LIAN, ZHU JIA-XUAN, ZENG XIANG-XIN, JIN LAN 2005-07-30 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1979 28(5): 129-134. article doi:10.7498/aps.28.129 10.7498/aps.28.129 Acta Physica Sinica 28 5 2005-07-30 //www.getgobooth.com/en/article/doi/10.7498/aps.28.129 129-134 <![CDATA[THE SUFFICIENT CRITERION FOR THE INTERNAL MHD KINK INSTABILITY]]> //www.getgobooth.com/en/article/doi/10.7498/aps.28.135 Author(s): WANG ZONG-TIAN <br/><p></p> <br/>Acta Physica Sinica. 1979 28(5): 135-139. Published 2005-07-30 Author(s): WANG ZONG-TIAN <br/><p></p> <br/>Acta Physica Sinica. 1979 28(5): 135-139. Published 2005-07-30 THE SUFFICIENT CRITERION FOR THE INTERNAL MHD KINK INSTABILITY WANG ZONG-TIAN 2005-07-30 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1979 28(5): 135-139. article doi:10.7498/aps.28.135 10.7498/aps.28.135 Acta Physica Sinica 28 5 2005-07-30 //www.getgobooth.com/en/article/doi/10.7498/aps.28.135 135-139 <![CDATA[THE ACTIVITY EXPANSION FOR THE EQUATION OF STATE OF A PLASMA]]> //www.getgobooth.com/en/article/doi/10.7498/aps.28.140 Author(s): AN ZHI-GANG <br/><p></p> <br/>Acta Physica Sinica. 1979 28(5): 140-142. Published 2005-07-30 Author(s): AN ZHI-GANG <br/><p></p> <br/>Acta Physica Sinica. 1979 28(5): 140-142. Published 2005-07-30 THE ACTIVITY EXPANSION FOR THE EQUATION OF STATE OF A PLASMA AN ZHI-GANG 2005-07-30 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1979 28(5): 140-142. article doi:10.7498/aps.28.140 10.7498/aps.28.140 Acta Physica Sinica 28 5 2005-07-30 //www.getgobooth.com/en/article/doi/10.7498/aps.28.140 140-142 <![CDATA[A GRAVITATIONAL FIELD EQUATION WITH HIGHER ORDER DERIVATIVES AND IT'S SPHERICALLY SYMMETRIC STATIC SOLUTIONS]]> //www.getgobooth.com/en/article/doi/10.7498/aps.28.143 Author(s): SHEY YONG-CHENG <br/><p></p> <br/>Acta Physica Sinica. 1979 28(5): 143-149. Published 2005-07-30 Author(s): SHEY YONG-CHENG <br/><p></p> <br/>Acta Physica Sinica. 1979 28(5): 143-149. Published 2005-07-30 A GRAVITATIONAL FIELD EQUATION WITH HIGHER ORDER DERIVATIVES AND IT'S SPHERICALLY SYMMETRIC STATIC SOLUTIONS SHEY YONG-CHENG 2005-07-30 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1979 28(5): 143-149. article doi:10.7498/aps.28.143 10.7498/aps.28.143 Acta Physica Sinica 28 5 2005-07-30 //www.getgobooth.com/en/article/doi/10.7498/aps.28.143 143-149 <![CDATA[THE NONLINEAR REFRACTIVE INDEX OF Nd<sup<3+</sup<:GLASS RESULTED FROM TWO-PHOTON RESONANT ABSORPTION BY Nd<sup<3+</sup< IONS]]> //www.getgobooth.com/en/article/doi/10.7498/aps.28.150 Author(s): WU CUN-KAI, FAN JUN-YIN <br/><p></p> <br/>Acta Physica Sinica. 1979 28(5): 150-152. Published 2005-07-30 Author(s): WU CUN-KAI, FAN JUN-YIN <br/><p></p> <br/>Acta Physica Sinica. 1979 28(5): 150-152. Published 2005-07-30 THE NONLINEAR REFRACTIVE INDEX OF Nd&lt;sup&lt;3+&lt;/sup&lt;:GLASS RESULTED FROM TWO-PHOTON RESONANT ABSORPTION BY Nd&lt;sup&lt;3+&lt;/sup&lt; IONS WU CUN-KAI, FAN JUN-YIN 2005-07-30 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1979 28(5): 150-152. article doi:10.7498/aps.28.150 10.7498/aps.28.150 Acta Physica Sinica 28 5 2005-07-30 //www.getgobooth.com/en/article/doi/10.7498/aps.28.150 150-152
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