//m.getgobooth.com/ 必威体育下载 daily 15 2024-09-05 15:36:24 apsoffice@iphy.ac.cn apsoffice@iphy.ac.cn 2024-09-05 15:36:24 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.20.1067 Author(s): WANG DING-SHENG, PU FU-CHO <br/><p>The system of spins in a finite ferromagnetic-antiferromagnetic chain, coupled by exchange interaction, is investigated. The spin-wave spectrum and the intensities of its excitation are calculated. On the basis of the results obtained, the spin-wave resonance of a ferromagnetic film with a surface of antiferromagnetic oxide is discussed. The validity of the general phenomenological boundary condition is elucidated. The value estimated for the equivalent surface anisotropy energy according to our theory is found to be in fairly good agreement with experimental data.</p> <br/>Acta Physica Sinica. 1964 20(11): 1067-1078. Published 2005-08-05 Author(s): WANG DING-SHENG, PU FU-CHO <br/><p>The system of spins in a finite ferromagnetic-antiferromagnetic chain, coupled by exchange interaction, is investigated. The spin-wave spectrum and the intensities of its excitation are calculated. On the basis of the results obtained, the spin-wave resonance of a ferromagnetic film with a surface of antiferromagnetic oxide is discussed. The validity of the general phenomenological boundary condition is elucidated. The value estimated for the equivalent surface anisotropy energy according to our theory is found to be in fairly good agreement with experimental data.</p> <br/>Acta Physica Sinica. 1964 20(11): 1067-1078. Published 2005-08-05 THE SPIN-WAVE SPECTRUM AND ITS EXCITATION IN A FINITE FERROMAGNETIC-ANTIFERROMAGNETIC LINEAR CHAIN WANG DING-SHENG, PU FU-CHO 2005-08-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1964 20(11): 1067-1078. article doi:10.7498/aps.20.1067 10.7498/aps.20.1067 Acta Physica Sinica 20 11 2005-08-05 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1067 1067-1078 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1079 Author(s): FANG LI-ZHI, LUO YI-ZU <br/><p>In this paper, the "short-time" part of the linewidth of a laser beam has been considered with the fundamental equations which describe the behaviours of lasers. This linewidth is described usually by △vs=(8πhv(△v′)2)/P, (1) here △v′ is the half-width of the electromagnetic mode of cavity, v the beam frequency, and P the output power. The main results can be summarized in the following way: (1) The linewidth is raised mainly from the dissipative system coupled to the electromagnetic mode, and the contribution of the dissipative system coupled to the molecules is negligible. (2) In the single-mode approximation formula (1) is correct, only if 1/T2?1/(2π)△v′,1/T2 being the homogeneous linewidth of molecules. (3) If the inter-actions between the exciting mode and other modes in the multimode cavity are strong, then formula (1) will be generalized to the following: △vs=(8πhv(△v′)2)/P+(4hv(△v′))/P somefromn=(λ′≠λ)(rλλ′2/(rλ′),(2) here γλλ′ is the correlative relaxation coefficient and γλ′ is the half-width of mode λ′. In certain case the second term in formula (2) may be much larger than its first term. Therefore, it is one of reasons for the disagreement between the experimental results about the linewidth and the prediction from formula (1).</p> <br/>Acta Physica Sinica. 1964 20(11): 1079-1089. Published 2005-08-05 Author(s): FANG LI-ZHI, LUO YI-ZU <br/><p>In this paper, the "short-time" part of the linewidth of a laser beam has been considered with the fundamental equations which describe the behaviours of lasers. This linewidth is described usually by △vs=(8πhv(△v′)2)/P, (1) here △v′ is the half-width of the electromagnetic mode of cavity, v the beam frequency, and P the output power. The main results can be summarized in the following way: (1) The linewidth is raised mainly from the dissipative system coupled to the electromagnetic mode, and the contribution of the dissipative system coupled to the molecules is negligible. (2) In the single-mode approximation formula (1) is correct, only if 1/T2?1/(2π)△v′,1/T2 being the homogeneous linewidth of molecules. (3) If the inter-actions between the exciting mode and other modes in the multimode cavity are strong, then formula (1) will be generalized to the following: △vs=(8πhv(△v′)2)/P+(4hv(△v′))/P somefromn=(λ′≠λ)(rλλ′2/(rλ′),(2) here γλλ′ is the correlative relaxation coefficient and γλ′ is the half-width of mode λ′. In certain case the second term in formula (2) may be much larger than its first term. Therefore, it is one of reasons for the disagreement between the experimental results about the linewidth and the prediction from formula (1).</p> <br/>Acta Physica Sinica. 1964 20(11): 1079-1089. Published 2005-08-05 ON THE LINEWIDTH OF LASERS FANG LI-ZHI, LUO YI-ZU 2005-08-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1964 20(11): 1079-1089. article doi:10.7498/aps.20.1079 10.7498/aps.20.1079 Acta Physica Sinica 20 11 2005-08-05 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1079 1079-1089 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1090 Author(s): T. S. CHANG <br/><p>The first inelastic amplitudes in the Lee model possessing crossing symmetries are shown to satisfy a pair of simultaneous integral equations of Omne's type which may be solved in the usual way, on assuming known elastic amplitudes. The equations may be written in such a way that the inhomogeneous terms are small in the elastic region of one of the variables. From this, it is shown that it is possible that the inelastic contributions to the absorptive part of the elastic scattering are small in the first inelastic region.A set of integral equations displaying fuller crossing symmetry among the θ particles involved is proposed.</p> <br/>Acta Physica Sinica. 1964 20(11): 1090-1100. Published 2005-08-05 Author(s): T. S. CHANG <br/><p>The first inelastic amplitudes in the Lee model possessing crossing symmetries are shown to satisfy a pair of simultaneous integral equations of Omne's type which may be solved in the usual way, on assuming known elastic amplitudes. The equations may be written in such a way that the inhomogeneous terms are small in the elastic region of one of the variables. From this, it is shown that it is possible that the inelastic contributions to the absorptive part of the elastic scattering are small in the first inelastic region.A set of integral equations displaying fuller crossing symmetry among the θ particles involved is proposed.</p> <br/>Acta Physica Sinica. 1964 20(11): 1090-1100. Published 2005-08-05 INELASTIC AMPLITUDES IN THE LEE MODEL POSSESSING CROSSING SYMMETRIES T. S. CHANG 2005-08-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1964 20(11): 1090-1100. article doi:10.7498/aps.20.1090 10.7498/aps.20.1090 Acta Physica Sinica 20 11 2005-08-05 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1090 1090-1100 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1101 Author(s): LO LEAU-FU, LU TAN, YANG KUO-SHEN <br/><p>The μ-e symmetry is destroyed by the anomalous interaction. We discuss the influence of the anomalous interaction on the weak-processes, and analyse the relation between the renormalization of the weak-interaction constant and such properties of the anomalous interaction as the charge independence and the γ5-transformation. The re-normalized constants are shown to be GV=G,GA=εG,ε=1+δ. This result is used to solve the difficulty which occurs when one uses the universal V-A Fermi weak-interaction theory and the conserved vector current hypothesis to explain the lifetime of the muon. Comparing the thory with various experiments, we obtain δ = 0.04, which may be interpreted as the experimental limitation of the μ-e symmetry.</p> <br/>Acta Physica Sinica. 1964 20(11): 1101-1113. Published 2005-08-05 Author(s): LO LEAU-FU, LU TAN, YANG KUO-SHEN <br/><p>The μ-e symmetry is destroyed by the anomalous interaction. We discuss the influence of the anomalous interaction on the weak-processes, and analyse the relation between the renormalization of the weak-interaction constant and such properties of the anomalous interaction as the charge independence and the γ5-transformation. The re-normalized constants are shown to be GV=G,GA=εG,ε=1+δ. This result is used to solve the difficulty which occurs when one uses the universal V-A Fermi weak-interaction theory and the conserved vector current hypothesis to explain the lifetime of the muon. Comparing the thory with various experiments, we obtain δ = 0.04, which may be interpreted as the experimental limitation of the μ-e symmetry.</p> <br/>Acta Physica Sinica. 1964 20(11): 1101-1113. Published 2005-08-05 THE LIFETIME OF THE MUON AND THE EXPERIMENTAL LIMITATION OF THE μ-e SYMMETRY LO LEAU-FU, LU TAN, YANG KUO-SHEN 2005-08-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1964 20(11): 1101-1113. article doi:10.7498/aps.20.1101 10.7498/aps.20.1101 Acta Physica Sinica 20 11 2005-08-05 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1101 1101-1113 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1114 Author(s): LIN FU-CHENG, ZHU JI-KANG, HUANG WU-HAN <br/><p>A generalized effective spin-Hamiltonian HSG describing the EPR of transition group ions in crystal is proposed on the basis of group theory. In this method, HSG is considered strictly by the space-time symmetry. In the first order perturbation, the irreducible spin tensors TLM (L=0,1,…, 2S) describe completely the EPR of paramagnetic ions with ground state having (2S + 1) energy levels. Irreducible tensors in several point-group symmetries are presented for convenience of obtaining HSG explicitly. Such a HSG is equivalent to the Koster-Statz matrix.</p> <br/>Acta Physica Sinica. 1964 20(11): 1114-1123. Published 2005-08-05 Author(s): LIN FU-CHENG, ZHU JI-KANG, HUANG WU-HAN <br/><p>A generalized effective spin-Hamiltonian HSG describing the EPR of transition group ions in crystal is proposed on the basis of group theory. In this method, HSG is considered strictly by the space-time symmetry. In the first order perturbation, the irreducible spin tensors TLM (L=0,1,…, 2S) describe completely the EPR of paramagnetic ions with ground state having (2S + 1) energy levels. Irreducible tensors in several point-group symmetries are presented for convenience of obtaining HSG explicitly. Such a HSG is equivalent to the Koster-Statz matrix.</p> <br/>Acta Physica Sinica. 1964 20(11): 1114-1123. Published 2005-08-05 A GENERALIZED EFFECTIVE SPIN-HAMILTONIAN LIN FU-CHENG, ZHU JI-KANG, HUANG WU-HAN 2005-08-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1964 20(11): 1114-1123. article doi:10.7498/aps.20.1114 10.7498/aps.20.1114 Acta Physica Sinica 20 11 2005-08-05 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1114 1114-1123 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1124 Author(s): LOH CHYUAN-KONG <br/><p>In this paper, we investigate the macroscopic transient properties in plasma caused by a pressure gradient perpendicular to a constant magnetic field. Under the condition of zero initial flow velocity normal to the magnetic field, we get the instantaneous diffusion coefficient (when ωceτ?1) D= (2kmec2)/e2 T/(B2τ)+(kc)/eT/Be-(me t)/(mi τ)sinωcit, where τ is the mean collision time between an ion and an electron.</p> <br/>Acta Physica Sinica. 1964 20(11): 1124-1128. Published 2005-08-05 Author(s): LOH CHYUAN-KONG <br/><p>In this paper, we investigate the macroscopic transient properties in plasma caused by a pressure gradient perpendicular to a constant magnetic field. Under the condition of zero initial flow velocity normal to the magnetic field, we get the instantaneous diffusion coefficient (when ωceτ?1) D= (2kmec2)/e2 T/(B2τ)+(kc)/eT/Be-(me t)/(mi τ)sinωcit, where τ is the mean collision time between an ion and an electron.</p> <br/>Acta Physica Sinica. 1964 20(11): 1124-1128. Published 2005-08-05 ON TRANSIENT PROCESSES IN PLASMA LOH CHYUAN-KONG 2005-08-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1964 20(11): 1124-1128. article doi:10.7498/aps.20.1124 10.7498/aps.20.1124 Acta Physica Sinica 20 11 2005-08-05 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1124 1124-1128 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1129 Author(s): HSU PEI-WEI, KUNG FAN-MEI, KUNG HSUCH-HUI <br/><p>The existence of a resonance in K-K pair with a mass of 1.02 BeV has been recently observed in π--p and K--p collisions. In several reports the quantum numbers in this resonant state have been determined, but the results are different from one another. From the field theoretical point of view and by means of the chain approximation, we have calculated the interaction potential of K-K system and indicated that there is a resonance in 1.02 BeV T=0,JPG=0++.</p> <br/>Acta Physica Sinica. 1964 20(11): 1129-1134. Published 2005-08-05 Author(s): HSU PEI-WEI, KUNG FAN-MEI, KUNG HSUCH-HUI <br/><p>The existence of a resonance in K-K pair with a mass of 1.02 BeV has been recently observed in π--p and K--p collisions. In several reports the quantum numbers in this resonant state have been determined, but the results are different from one another. From the field theoretical point of view and by means of the chain approximation, we have calculated the interaction potential of K-K system and indicated that there is a resonance in 1.02 BeV T=0,JPG=0++.</p> <br/>Acta Physica Sinica. 1964 20(11): 1129-1134. Published 2005-08-05 K-K RESONANCE HSU PEI-WEI, KUNG FAN-MEI, KUNG HSUCH-HUI 2005-08-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1964 20(11): 1129-1134. article doi:10.7498/aps.20.1129 10.7498/aps.20.1129 Acta Physica Sinica 20 11 2005-08-05 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1129 1129-1134 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1135 Author(s): <br/><p></p> <br/>Acta Physica Sinica. 1964 20(11): 1135-1141. Published 2005-08-05 Author(s): <br/><p></p> <br/>Acta Physica Sinica. 1964 20(11): 1135-1141. Published 2005-08-05 BEличиHA иHфOPMAции B фOPMиPOBAHии OnTичECKOгO и30ъPAжEHия 2005-08-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1964 20(11): 1135-1141. article doi:10.7498/aps.20.1135 10.7498/aps.20.1135 Acta Physica Sinica 20 11 2005-08-05 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1135 1135-1141 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1142 Author(s): WANG YEH-NING, TING SUI-DIN, JIANG SHOU-SHENG, WANG SHIH-YUAN <br/><p>Internal friction as a function of strain amplitude in zone-refined molybdenum single crystals and commercially pure polycrystalline molybdenum was measured with the three-component piezo-electric resonator method developed by Marx. A Granato-Lücke (GL) type of strain-amplitude-dependent decrement was obtained in molybdenum single crystal annealed in hydrogen at 2000℃. With some prior deformation in molybdenum single crystal, a plateau (or maximum) appears on the decrement-amplitude curve, which is similar to the results of pure aluminium at low temperature and low strain amplitude. From the observations of dislocation etch-pits, it may be concluded that the presence of this plateau is related to the fresh dislocations (or weakly pinned dislocations) produced by cold work. The increase of decrement at the plateau (or maximum) is proportional to the density of fresh dislocations. The investigations of the effects of temperature and aging (200-300℃) on the amplitude-dependent decrement indicated that the decrement decreases with the decrease of temperature and with the increase of aging time, and the position of the maximum shifts to the higher amplitude as the temperature decreases. All the results are discussed in terms of an extension of the GL theory.The effect of cold work on the strain-amplitude-dependent decrement of poly-cryctalline molybdenum was also measured; the results are fairly consistent with the GL theory.</p> <br/>Acta Physica Sinica. 1964 20(11): 1142-1152. Published 2005-08-05 Author(s): WANG YEH-NING, TING SUI-DIN, JIANG SHOU-SHENG, WANG SHIH-YUAN <br/><p>Internal friction as a function of strain amplitude in zone-refined molybdenum single crystals and commercially pure polycrystalline molybdenum was measured with the three-component piezo-electric resonator method developed by Marx. A Granato-Lücke (GL) type of strain-amplitude-dependent decrement was obtained in molybdenum single crystal annealed in hydrogen at 2000℃. With some prior deformation in molybdenum single crystal, a plateau (or maximum) appears on the decrement-amplitude curve, which is similar to the results of pure aluminium at low temperature and low strain amplitude. From the observations of dislocation etch-pits, it may be concluded that the presence of this plateau is related to the fresh dislocations (or weakly pinned dislocations) produced by cold work. The increase of decrement at the plateau (or maximum) is proportional to the density of fresh dislocations. The investigations of the effects of temperature and aging (200-300℃) on the amplitude-dependent decrement indicated that the decrement decreases with the decrease of temperature and with the increase of aging time, and the position of the maximum shifts to the higher amplitude as the temperature decreases. All the results are discussed in terms of an extension of the GL theory.The effect of cold work on the strain-amplitude-dependent decrement of poly-cryctalline molybdenum was also measured; the results are fairly consistent with the GL theory.</p> <br/>Acta Physica Sinica. 1964 20(11): 1142-1152. Published 2005-08-05 INTERNAL FRICTION DUE TO DISLOCATIONS IN MOLYBDENUM AT KILOCYCLE FREQUENCY WANG YEH-NING, TING SUI-DIN, JIANG SHOU-SHENG, WANG SHIH-YUAN 2005-08-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1964 20(11): 1142-1152. article doi:10.7498/aps.20.1142 10.7498/aps.20.1142 Acta Physica Sinica 20 11 2005-08-05 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1142 1142-1152 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1153 Author(s): <br/><p></p> <br/>Acta Physica Sinica. 1964 20(11): 1153-1163. Published 2005-08-05 Author(s): <br/><p></p> <br/>Acta Physica Sinica. 1964 20(11): 1153-1163. Published 2005-08-05 OпPEлEлEHиE CTPYKTyPbI KPиCTAллA и MOлEKYпbl (CH&lt;sub&lt;2&lt;/sub&lt;COOH)&lt;sub&lt;2&lt;/sub&lt; NCH&lt;sub&lt;2&lt;/sub&lt;COOAg 2005-08-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1964 20(11): 1153-1163. article doi:10.7498/aps.20.1153 10.7498/aps.20.1153 Acta Physica Sinica 20 11 2005-08-05 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1153 1153-1163 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1164 Author(s): T. F. HU, C. WEI, C. S. CHANG <br/><p>A germanium interferometer which may be used for measuring the dispersion curves of organic liquids in the spectral region of 2-11 microns is described. It was found that the dispersion curves of benzene and chloroform in the 2-6 microns region measured with this interferometer are in good agreement with those obtained by other authors.</p> <br/>Acta Physica Sinica. 1964 20(11): 1164-1171. Published 2005-08-05 Author(s): T. F. HU, C. WEI, C. S. CHANG <br/><p>A germanium interferometer which may be used for measuring the dispersion curves of organic liquids in the spectral region of 2-11 microns is described. It was found that the dispersion curves of benzene and chloroform in the 2-6 microns region measured with this interferometer are in good agreement with those obtained by other authors.</p> <br/>Acta Physica Sinica. 1964 20(11): 1164-1171. Published 2005-08-05 GE IR INTERFEREMETER T. F. HU, C. WEI, C. S. CHANG 2005-08-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1964 20(11): 1164-1171. article doi:10.7498/aps.20.1164 10.7498/aps.20.1164 Acta Physica Sinica 20 11 2005-08-05 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1164 1164-1171 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1172 Author(s): <br/><p></p> <br/>Acta Physica Sinica. 1964 20(11): 1172-1175. Published 2005-08-05 Author(s): <br/><p></p> <br/>Acta Physica Sinica. 1964 20(11): 1172-1175. Published 2005-08-05 2005-08-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1964 20(11): 1172-1175. article doi:10.7498/aps.20.1172 10.7498/aps.20.1172 Acta Physica Sinica 20 11 2005-08-05 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1172 1172-1175 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1176 Author(s): <br/><p></p> <br/>Acta Physica Sinica. 1964 20(11): 1176-1177. Published 2005-08-05 Author(s): <br/><p></p> <br/>Acta Physica Sinica. 1964 20(11): 1176-1177. Published 2005-08-05 2005-08-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1964 20(11): 1176-1177. article doi:10.7498/aps.20.1176 10.7498/aps.20.1176 Acta Physica Sinica 20 11 2005-08-05 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1176 1176-1177 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1178 Author(s): <br/><p></p> <br/>Acta Physica Sinica. 1964 20(11): 1178-1179. Published 2005-08-05 Author(s): <br/><p></p> <br/>Acta Physica Sinica. 1964 20(11): 1178-1179. Published 2005-08-05 2005-08-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1964 20(11): 1178-1179. article doi:10.7498/aps.20.1178 10.7498/aps.20.1178 Acta Physica Sinica 20 11 2005-08-05 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1178 1178-1179 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1180 Author(s): <br/><p></p> <br/>Acta Physica Sinica. 1964 20(11): 1180-1181. Published 2005-08-05 Author(s): <br/><p></p> <br/>Acta Physica Sinica. 1964 20(11): 1180-1181. Published 2005-08-05 2005-08-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1964 20(11): 1180-1181. article doi:10.7498/aps.20.1180 10.7498/aps.20.1180 Acta Physica Sinica 20 11 2005-08-05 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1180 1180-1181 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1182 Author(s): <br/><p></p> <br/>Acta Physica Sinica. 1964 20(11): 1182-1186. Published 2005-08-05 Author(s): <br/><p></p> <br/>Acta Physica Sinica. 1964 20(11): 1182-1186. Published 2005-08-05 2005-08-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1964 20(11): 1182-1186. article doi:10.7498/aps.20.1182 10.7498/aps.20.1182 Acta Physica Sinica 20 11 2005-08-05 //m.getgobooth.com/en/article/doi/10.7498/aps.20.1182 1182-1186