//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 //www.getgobooth.com/en/article/doi/10.7498/aps.21.691 Author(s): KAN TZE-CHAO <br/><p>The hyperfine interaction of the carriers in semiconductors (involving the Fermi-contact and noncontact terms) has been treated by a "pseudo-contact interaction", which acts on the effective mass wavefunction. For the Si29 nucleons and the holes in silicon, it can be represented by {S1(Jxμnx+Jyμny+Jzμnz)+S2(Jx3μnx+Jy3μny+Jz3μnz)}δ(r-rn). The coupling parameters S1 and S2 are certain integrals connecting the Bloch functions of the top of the value band, generally S2≈0. Utilizing the above formula we have treated the nuclear magnetic relaxation in p-type silicon and obtained an expression for the relaxation time; the value of the parameter S1 has been determined from the relaxation time and from the spin orbit splitting value at the valence band top.</p> <br/>Acta Physica Sinica. 1965 21(4): 691-706. Published 1965-02-05 Author(s): KAN TZE-CHAO <br/><p>The hyperfine interaction of the carriers in semiconductors (involving the Fermi-contact and noncontact terms) has been treated by a "pseudo-contact interaction", which acts on the effective mass wavefunction. For the Si29 nucleons and the holes in silicon, it can be represented by {S1(Jxμnx+Jyμny+Jzμnz)+S2(Jx3μnx+Jy3μny+Jz3μnz)}δ(r-rn). The coupling parameters S1 and S2 are certain integrals connecting the Bloch functions of the top of the value band, generally S2≈0. Utilizing the above formula we have treated the nuclear magnetic relaxation in p-type silicon and obtained an expression for the relaxation time; the value of the parameter S1 has been determined from the relaxation time and from the spin orbit splitting value at the valence band top.</p> <br/>Acta Physica Sinica. 1965 21(4): 691-706. Published 1965-02-05 THE HYPERFINE INTERACTION BETWEEN NUCLEONS AND HOLES OF SILICON, AND THE NUCLEAR MAGNETIC RELAXATION IN THE p-TYPE SILICON KAN TZE-CHAO 1965-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1965 21(4): 691-706. article doi:10.7498/aps.21.691 10.7498/aps.21.691 Acta Physica Sinica 21 4 1965-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.21.691 691-706 //www.getgobooth.com/en/article/doi/10.7498/aps.21.707 Author(s): <br/><p></p> <br/>Acta Physica Sinica. 1965 21(4): 707-713. Published 1965-02-05 Author(s): <br/><p></p> <br/>Acta Physica Sinica. 1965 21(4): 707-713. Published 1965-02-05 1965-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1965 21(4): 707-713. article doi:10.7498/aps.21.707 10.7498/aps.21.707 Acta Physica Sinica 21 4 1965-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.21.707 707-713 //www.getgobooth.com/en/article/doi/10.7498/aps.21.714 Author(s): WANG TZU-SHIANG, LO CHUEN-SHUN, MA YA-DE, CHIN YONG-HSIEN, HO AN-SHIANG <br/><p>Using the 24-litre propane chamber, photographs from JINR π0-meson production in inelastic interactions of π--mesons of momentum 6.8 GeV/c with nucleons are examined. About 2700 pairs of stereoscopic pictures have been scanned and 1275 events of π--N inelastic interactions have been found in an effective region 29.3 cm wide. In these events, 936 π--p and 339 π--n events, 240 and 89 electron-positron pairs have been observed respectively. After taking account of the efficiency of the bubble chamber for detection of γ-photons, it is found that the mean number of π0 mesons produced per event is n(π0)=1.00±0.06 and the mean transverse momentum of the γ-photons is Pγ⊥ = 173 MeV/c. In addition, the energy distribution of the γ-photons is especially examined. Under the assumptions that the γ-photons are entirely due to π0 decays and that the energy spectrum of the π0 mesons is the same as that of the π± -mesons', an energy distribution of γ-photons can be deduced from the energy distribution of the secondary π±-mesons produced in π--N interactions at the same incident energy; the γ-photon energy distribution obtained in the present experiment is in agreement with this deduced distribution within experimental error.</p> <br/>Acta Physica Sinica. 1965 21(4): 714-719. Published 1965-02-05 Author(s): WANG TZU-SHIANG, LO CHUEN-SHUN, MA YA-DE, CHIN YONG-HSIEN, HO AN-SHIANG <br/><p>Using the 24-litre propane chamber, photographs from JINR π0-meson production in inelastic interactions of π--mesons of momentum 6.8 GeV/c with nucleons are examined. About 2700 pairs of stereoscopic pictures have been scanned and 1275 events of π--N inelastic interactions have been found in an effective region 29.3 cm wide. In these events, 936 π--p and 339 π--n events, 240 and 89 electron-positron pairs have been observed respectively. After taking account of the efficiency of the bubble chamber for detection of γ-photons, it is found that the mean number of π0 mesons produced per event is n(π0)=1.00±0.06 and the mean transverse momentum of the γ-photons is Pγ⊥ = 173 MeV/c. In addition, the energy distribution of the γ-photons is especially examined. Under the assumptions that the γ-photons are entirely due to π0 decays and that the energy spectrum of the π0 mesons is the same as that of the π± -mesons', an energy distribution of γ-photons can be deduced from the energy distribution of the secondary π±-mesons produced in π--N interactions at the same incident energy; the γ-photon energy distribution obtained in the present experiment is in agreement with this deduced distribution within experimental error.</p> <br/>Acta Physica Sinica. 1965 21(4): 714-719. Published 1965-02-05 π&lt;sup&lt;0&lt;/sup&lt;-MESON PRODUCTION IN π&lt;sup&lt;-&lt;/sup&lt;-N INELASTIC INTERACTIONS AT 6.8 GeV/c WANG TZU-SHIANG, LO CHUEN-SHUN, MA YA-DE, CHIN YONG-HSIEN, HO AN-SHIANG 1965-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1965 21(4): 714-719. article doi:10.7498/aps.21.714 10.7498/aps.21.714 Acta Physica Sinica 21 4 1965-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.21.714 714-719 //www.getgobooth.com/en/article/doi/10.7498/aps.21.720 Author(s): <br/><p></p> <br/>Acta Physica Sinica. 1965 21(4): 720-735. Published 1965-02-05 Author(s): <br/><p></p> <br/>Acta Physica Sinica. 1965 21(4): 720-735. Published 1965-02-05 1965-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1965 21(4): 720-735. article doi:10.7498/aps.21.720 10.7498/aps.21.720 Acta Physica Sinica 21 4 1965-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.21.720 720-735 //www.getgobooth.com/en/article/doi/10.7498/aps.21.736 Author(s): GIH KWANG-TA, CHOU HSI-TING, CHANG YUAN-CHENG, HO KUO-CHU <br/><p>The ion-optical properties of the accerlerating tube made of a series of coaxial cylinders in a DC accerlerator have been investigated. The potential distribution in such an accerlerating tube has been found both theoretically and experimentally by means of an electrolytic trough. The field in the accerlerating tube is found to be not exactly uniform as usually considered but it should also consist of a periodic part.The paraxial-ray equation for describing the ion trajectory in such a periodic field has been solved. The profile of the ion beam does show an undulatory shape, especially in the low energy region. The periodic field produces a significant focusing effect. A formula for describing the focal length of the ion-optical system was derived. The space charge effect has also been considered.</p> <br/>Acta Physica Sinica. 1965 21(4): 736-747. Published 1965-02-05 Author(s): GIH KWANG-TA, CHOU HSI-TING, CHANG YUAN-CHENG, HO KUO-CHU <br/><p>The ion-optical properties of the accerlerating tube made of a series of coaxial cylinders in a DC accerlerator have been investigated. The potential distribution in such an accerlerating tube has been found both theoretically and experimentally by means of an electrolytic trough. The field in the accerlerating tube is found to be not exactly uniform as usually considered but it should also consist of a periodic part.The paraxial-ray equation for describing the ion trajectory in such a periodic field has been solved. The profile of the ion beam does show an undulatory shape, especially in the low energy region. The periodic field produces a significant focusing effect. A formula for describing the focal length of the ion-optical system was derived. The space charge effect has also been considered.</p> <br/>Acta Physica Sinica. 1965 21(4): 736-747. Published 1965-02-05 PERIODIC FOCUSING EFFECT IN DC ACCERLERATORS GIH KWANG-TA, CHOU HSI-TING, CHANG YUAN-CHENG, HO KUO-CHU 1965-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1965 21(4): 736-747. article doi:10.7498/aps.21.736 10.7498/aps.21.736 Acta Physica Sinica 21 4 1965-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.21.736 736-747 //www.getgobooth.com/en/article/doi/10.7498/aps.21.748 Author(s): <br/><p></p> <br/>Acta Physica Sinica. 1965 21(4): 748-764. Published 1965-02-05 Author(s): <br/><p></p> <br/>Acta Physica Sinica. 1965 21(4): 748-764. Published 1965-02-05 1965-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1965 21(4): 748-764. article doi:10.7498/aps.21.748 10.7498/aps.21.748 Acta Physica Sinica 21 4 1965-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.21.748 748-764 //www.getgobooth.com/en/article/doi/10.7498/aps.21.765 Author(s): DAI YUAN-BEN <br/><p>It is proved that for a class of nonlocal potentials, the S matrix element S(λ,k) as a function of the angular momentum λ is meromorphic in λ in the region Re λ &lt; 0. It is proved further that as λ→∞ along the positive real axis or the negative imaginary axis, [S(λ, k)-1] exp(-iπλ)→0. Under more restrictive assumptions, it is shown that S(λ, k) is meromorphic with respect to the momentum variable k in the strip |Im k| &lt; μ. The positions of the poles are discussed. For such potentials, the Regge poles in the right half plane do not lie necessarily in the first quadrant.</p> <br/>Acta Physica Sinica. 1965 21(4): 765-778. Published 1965-02-05 Author(s): DAI YUAN-BEN <br/><p>It is proved that for a class of nonlocal potentials, the S matrix element S(λ,k) as a function of the angular momentum λ is meromorphic in λ in the region Re λ &lt; 0. It is proved further that as λ→∞ along the positive real axis or the negative imaginary axis, [S(λ, k)-1] exp(-iπλ)→0. Under more restrictive assumptions, it is shown that S(λ, k) is meromorphic with respect to the momentum variable k in the strip |Im k| &lt; μ. The positions of the poles are discussed. For such potentials, the Regge poles in the right half plane do not lie necessarily in the first quadrant.</p> <br/>Acta Physica Sinica. 1965 21(4): 765-778. Published 1965-02-05 THE REGGE BEHAVIOUR FOR A CLASS OF NONLOCAL POTENTIALS DAI YUAN-BEN 1965-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1965 21(4): 765-778. article doi:10.7498/aps.21.765 10.7498/aps.21.765 Acta Physica Sinica 21 4 1965-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.21.765 765-778 //www.getgobooth.com/en/article/doi/10.7498/aps.21.779 Author(s): YUAN TUNG-TSE, CHEN SHIH <br/><p>The energy spectra of π0 in Kμ3+ and Ke3+ decays, and the energy spectrum and longitudinal polarization of μ+ in Kμ3+ decay have been calculated by the dispersion relation method on the assumptions that 1) the weak interaction is of a universal V-A form and 2) the strange vector current is not conserved. Consequently one subtraction is made for each of the dispersion relation for the form factors f0 and f1. Only the contribution of K1* (m* = 888 MeV) intermediate state is considered in the calculations. If the parameter defined in the paper is assumed to be equal to 2.1, the results agree with experiments within their limits of errors. Thus, better agreement with experiments could be achieved by abandoning the assumption of partially conserved strange vector current.</p> <br/>Acta Physica Sinica. 1965 21(4): 779-786. Published 1965-02-05 Author(s): YUAN TUNG-TSE, CHEN SHIH <br/><p>The energy spectra of π0 in Kμ3+ and Ke3+ decays, and the energy spectrum and longitudinal polarization of μ+ in Kμ3+ decay have been calculated by the dispersion relation method on the assumptions that 1) the weak interaction is of a universal V-A form and 2) the strange vector current is not conserved. Consequently one subtraction is made for each of the dispersion relation for the form factors f0 and f1. Only the contribution of K1* (m* = 888 MeV) intermediate state is considered in the calculations. If the parameter defined in the paper is assumed to be equal to 2.1, the results agree with experiments within their limits of errors. Thus, better agreement with experiments could be achieved by abandoning the assumption of partially conserved strange vector current.</p> <br/>Acta Physica Sinica. 1965 21(4): 779-786. Published 1965-02-05 THREE-BODY LEPTONIC DECAYS OF THE K&lt;sup&lt;+&lt;/sup&lt; MESON YUAN TUNG-TSE, CHEN SHIH 1965-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1965 21(4): 779-786. article doi:10.7498/aps.21.779 10.7498/aps.21.779 Acta Physica Sinica 21 4 1965-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.21.779 779-786 //www.getgobooth.com/en/article/doi/10.7498/aps.21.787 Author(s): GU SHI-JIE <br/><p>In this paper, the effect of electron-phonon coupling on the bandwidth of impurity absorption has been considered with a one-dimensional model of crystal lattices. The eigenfunctions of lattice vibrations in the presence of an impurity have been seriously treated by using a field theoretic method. The strength of electron-phonon coupling was obtained in analytical form as a function of the wave number k of the phonon, the range of interaction λ, and the parameter P = r′/r. Here r′ and r are respectively the force constant between an impurity and its neighbours and that between the normal neighbouring atoms. The results show that an impurity which causes the force costant to change has a considerable effect on the electron-phonon coupling. Under certain conditions the contribution of an antisymmetric localized mode in an ionic crystal may be much larger than the total contributions of intra-band modes. Especially, it is possible for the so called "critical scattering" to appear in ion crystals. In that case the contribution of intra-band modes may become very small and contribution comes almost entirely from the localized mode. Conversely, in a nonpolar crystal the contribution of the localized mode is generally negligible. The possible meaning of the above result in the problem of three-dimensional crystals was discussed in the final part of this article.</p> <br/>Acta Physica Sinica. 1965 21(4): 787-801. Published 1965-02-05 Author(s): GU SHI-JIE <br/><p>In this paper, the effect of electron-phonon coupling on the bandwidth of impurity absorption has been considered with a one-dimensional model of crystal lattices. The eigenfunctions of lattice vibrations in the presence of an impurity have been seriously treated by using a field theoretic method. The strength of electron-phonon coupling was obtained in analytical form as a function of the wave number k of the phonon, the range of interaction λ, and the parameter P = r′/r. Here r′ and r are respectively the force constant between an impurity and its neighbours and that between the normal neighbouring atoms. The results show that an impurity which causes the force costant to change has a considerable effect on the electron-phonon coupling. Under certain conditions the contribution of an antisymmetric localized mode in an ionic crystal may be much larger than the total contributions of intra-band modes. Especially, it is possible for the so called "critical scattering" to appear in ion crystals. In that case the contribution of intra-band modes may become very small and contribution comes almost entirely from the localized mode. Conversely, in a nonpolar crystal the contribution of the localized mode is generally negligible. The possible meaning of the above result in the problem of three-dimensional crystals was discussed in the final part of this article.</p> <br/>Acta Physica Sinica. 1965 21(4): 787-801. Published 1965-02-05 PROBLEM OF ELECTRON-PHONON COUPLING IN THE IMPURITY ABSORPTION BAND (II) GU SHI-JIE 1965-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1965 21(4): 787-801. article doi:10.7498/aps.21.787 10.7498/aps.21.787 Acta Physica Sinica 21 4 1965-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.21.787 787-801 //www.getgobooth.com/en/article/doi/10.7498/aps.21.802 Author(s): HSU CHIH-CHUNG, HSIEH HSI-TEH <br/><p>It is shown that in the direct product of two wave vector stars k?k′, if k"∈k?k′, the wave vector group, Gk", may belong to any one of the following cases: A) Both Gk and Gk′ are subgroups of Gk"; B) Gk=Gk′= Gk"; C) Gk" = Gs; D) Gs is the subgroup of Gk". The reduction of an integral A=μ″i″(k″)|fμi(k)|fμ′i′(k′)&lt;, is then studied for each of the four cases. It is found that for all cases, the value of the integral can be expressed in terms of the matrix element of a transformed matrix U by which the reducible representation has been reduced. The corresponding reducible representations Г′s are respec-tively: A) (Гki?Гk′i′)(?);B)Гki?Гk′i′;C)Гki(s)?Гk′i′(s); and D)(Гki(s)?Гk′i′(s))(?). The final form of the integral is then obtained by finding the explicit form of the transformation matrix by using the pseudo-projection operator.</p> <br/>Acta Physica Sinica. 1965 21(4): 802-816. Published 1965-02-05 Author(s): HSU CHIH-CHUNG, HSIEH HSI-TEH <br/><p>It is shown that in the direct product of two wave vector stars k?k′, if k"∈k?k′, the wave vector group, Gk", may belong to any one of the following cases: A) Both Gk and Gk′ are subgroups of Gk"; B) Gk=Gk′= Gk"; C) Gk" = Gs; D) Gs is the subgroup of Gk". The reduction of an integral A=μ″i″(k″)|fμi(k)|fμ′i′(k′)&lt;, is then studied for each of the four cases. It is found that for all cases, the value of the integral can be expressed in terms of the matrix element of a transformed matrix U by which the reducible representation has been reduced. The corresponding reducible representations Г′s are respec-tively: A) (Гki?Гk′i′)(?);B)Гki?Гk′i′;C)Гki(s)?Гk′i′(s); and D)(Гki(s)?Гk′i′(s))(?). The final form of the integral is then obtained by finding the explicit form of the transformation matrix by using the pseudo-projection operator.</p> <br/>Acta Physica Sinica. 1965 21(4): 802-816. Published 1965-02-05 THE MATRIX ELEMENT OF SPACE GROUP OPERATORS HSU CHIH-CHUNG, HSIEH HSI-TEH 1965-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1965 21(4): 802-816. article doi:10.7498/aps.21.802 10.7498/aps.21.802 Acta Physica Sinica 21 4 1965-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.21.802 802-816 //www.getgobooth.com/en/article/doi/10.7498/aps.21.817 Author(s): CHENG GUO-KUANG, LIU TI-HANG, KUAN WEI-YEN <br/><p>The heat capacity of Nb3Sn has been measured between 16.0°K and 20.3°K. A jump in specific heat at Tc is found with ΔC = 2.21 (±5%) joule/mole·deg. The transition temperature of the sample is Tc= 17.88°K, and the transition interval is ΔTc ≈ 0.2°K. From the measured ΔC and by using the thermodynamic relationship, the thermodynamic critical magnetic field at 0°K, H0≈5300 Oe, was obtained. Using the result of ΔC obtained in the present work, and the jump of the thermo-expansion coefficient Δα and (?Tc/(?p) from the literatures, the thermodynamic relation be-tween these quantities was found to be valid.Apparatus for measuring the specific heat is briefly described.</p> <br/>Acta Physica Sinica. 1965 21(4): 817-823. Published 1965-02-05 Author(s): CHENG GUO-KUANG, LIU TI-HANG, KUAN WEI-YEN <br/><p>The heat capacity of Nb3Sn has been measured between 16.0°K and 20.3°K. A jump in specific heat at Tc is found with ΔC = 2.21 (±5%) joule/mole·deg. The transition temperature of the sample is Tc= 17.88°K, and the transition interval is ΔTc ≈ 0.2°K. From the measured ΔC and by using the thermodynamic relationship, the thermodynamic critical magnetic field at 0°K, H0≈5300 Oe, was obtained. Using the result of ΔC obtained in the present work, and the jump of the thermo-expansion coefficient Δα and (?Tc/(?p) from the literatures, the thermodynamic relation be-tween these quantities was found to be valid.Apparatus for measuring the specific heat is briefly described.</p> <br/>Acta Physica Sinica. 1965 21(4): 817-823. Published 1965-02-05 SPECIFIC HEAT ANOMALY OF Nb&lt;sub&lt;3&lt;/sub&lt;Sn AT THE NORMAL-SUPERCONDUCTING TRANSITION CHENG GUO-KUANG, LIU TI-HANG, KUAN WEI-YEN 1965-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1965 21(4): 817-823. article doi:10.7498/aps.21.817 10.7498/aps.21.817 Acta Physica Sinica 21 4 1965-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.21.817 817-823 //www.getgobooth.com/en/article/doi/10.7498/aps.21.824 Author(s): 于渌, GU BEN-YUAN <br/><p>A simple two-band model was used to investigate the influence of the multiconnec-tivity of the Fermi surface on the properties of superconductors. It was shown that the effect is analogous to that of anisotropy. The effect of impurity scattering was considered by the Green's function method of Абрикосов and Горъков. There is a unique energy gap for both bands in the presence of impurities. The new gap parameter is larger than the smaller one of the two gaps in the pure case. The critical temperature Tc, critical magnetic field Hc, and its temperature coefficient x near T=0°K are lowered with doping, while the jump in specific heat at the transition point is raised. The combined measurement of the relative changes of these quantities should provide a direct verification of the theoretical calculations. The properties of heavily doped two-band superconductors are identical with those in the single band case. Furthermore, the results obtained were used to discuss the tunnelling experiment on Pb films and the anomaly of critical temperature in the alloy systems of In-Sn and In-Pb.</p> <br/>Acta Physica Sinica. 1965 21(4): 824-838. Published 1965-02-05 Author(s): 于渌, GU BEN-YUAN <br/><p>A simple two-band model was used to investigate the influence of the multiconnec-tivity of the Fermi surface on the properties of superconductors. It was shown that the effect is analogous to that of anisotropy. The effect of impurity scattering was considered by the Green's function method of Абрикосов and Горъков. There is a unique energy gap for both bands in the presence of impurities. The new gap parameter is larger than the smaller one of the two gaps in the pure case. The critical temperature Tc, critical magnetic field Hc, and its temperature coefficient x near T=0°K are lowered with doping, while the jump in specific heat at the transition point is raised. The combined measurement of the relative changes of these quantities should provide a direct verification of the theoretical calculations. The properties of heavily doped two-band superconductors are identical with those in the single band case. Furthermore, the results obtained were used to discuss the tunnelling experiment on Pb films and the anomaly of critical temperature in the alloy systems of In-Sn and In-Pb.</p> <br/>Acta Physica Sinica. 1965 21(4): 824-838. Published 1965-02-05 THE INFLUENCE OF THE IMPURITY SCATTERING ON THE PROPERTIES OF TWO-BAND SUPERCONDUCTORS 于渌, GU BEN-YUAN 1965-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1965 21(4): 824-838. article doi:10.7498/aps.21.824 10.7498/aps.21.824 Acta Physica Sinica 21 4 1965-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.21.824 824-838 //www.getgobooth.com/en/article/doi/10.7498/aps.21.839 Author(s): YEE SUN-SHENG, LIU YI-HUAN <br/><p>The ordering of the alloy AgAuZn2 has been studied by means of X-ray diffracto-metry. The specimens were quenched from 600℃ and subsequently annealed at 100℃ for various periods of time. It was shown that in the quenched condition almost all of the Zn atoms were at their appropriate lattice sites, whereas the Ag and Au atoms were comparatively less readily to occupy their right places. A very short period of annealing at 100℃ was sufficient to make all the Zn atoms take their proper positions. The ordering among Ag and Au atoms proceeded as annealing was continued, the positions of Zn atoms being unaffected.The size of antiphase domains deduced depended markedly on the indices of reflections during the early stage of domain growth. The final sizes attained in different directions, however, were practically the same. The ordering of atoms and the growth of domains took place simultaneously. However, the degree of order reached a steady value long before the domains attained the final size.</p> <br/>Acta Physica Sinica. 1965 21(4): 839-848. Published 1965-02-05 Author(s): YEE SUN-SHENG, LIU YI-HUAN <br/><p>The ordering of the alloy AgAuZn2 has been studied by means of X-ray diffracto-metry. The specimens were quenched from 600℃ and subsequently annealed at 100℃ for various periods of time. It was shown that in the quenched condition almost all of the Zn atoms were at their appropriate lattice sites, whereas the Ag and Au atoms were comparatively less readily to occupy their right places. A very short period of annealing at 100℃ was sufficient to make all the Zn atoms take their proper positions. The ordering among Ag and Au atoms proceeded as annealing was continued, the positions of Zn atoms being unaffected.The size of antiphase domains deduced depended markedly on the indices of reflections during the early stage of domain growth. The final sizes attained in different directions, however, were practically the same. The ordering of atoms and the growth of domains took place simultaneously. However, the degree of order reached a steady value long before the domains attained the final size.</p> <br/>Acta Physica Sinica. 1965 21(4): 839-848. Published 1965-02-05 THE ORDERING OF THE ALLOY AgAuZn&lt;sub&lt;2&lt;/sub&lt; YEE SUN-SHENG, LIU YI-HUAN 1965-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1965 21(4): 839-848. article doi:10.7498/aps.21.839 10.7498/aps.21.839 Acta Physica Sinica 21 4 1965-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.21.839 839-848 //www.getgobooth.com/en/article/doi/10.7498/aps.21.849 Author(s): LU HSUEH-SHAN, LIANG CHING-KWEI <br/><p>The crystal structure of FeGa3 has been determined by means of Debye-Scherrer photographs. The unit cell is tetragonal, with a = 6.2628? and c = 6.5559? at 20℃. There are four formula units per unit cell. The space group is D4h14——P42/mnm. The four Fe atoms are situated at the 4(f) positions, while the twelve Ga atoms are situated at the 4(c) and 8(j) positions, the atomic parameters being xf=0.343,xj=0.157 and zj=0.264.This structure represents a new type of intermetallic compound.</p> <br/>Acta Physica Sinica. 1965 21(4): 849-857. Published 1965-02-05 Author(s): LU HSUEH-SHAN, LIANG CHING-KWEI <br/><p>The crystal structure of FeGa3 has been determined by means of Debye-Scherrer photographs. The unit cell is tetragonal, with a = 6.2628? and c = 6.5559? at 20℃. There are four formula units per unit cell. The space group is D4h14——P42/mnm. The four Fe atoms are situated at the 4(f) positions, while the twelve Ga atoms are situated at the 4(c) and 8(j) positions, the atomic parameters being xf=0.343,xj=0.157 and zj=0.264.This structure represents a new type of intermetallic compound.</p> <br/>Acta Physica Sinica. 1965 21(4): 849-857. Published 1965-02-05 THE CRYSTAL STRUCTURE OF FeGa&lt;sub&lt;3&lt;/sub&lt; LU HSUEH-SHAN, LIANG CHING-KWEI 1965-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1965 21(4): 849-857. article doi:10.7498/aps.21.849 10.7498/aps.21.849 Acta Physica Sinica 21 4 1965-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.21.849 849-857 //www.getgobooth.com/en/article/doi/10.7498/aps.21.858 Author(s): CHANG SHIH-CHUN <br/><p>Starting from the discussion of analytic properties and using the Landau relation to improve the diagrammatic technique of Dzyaloshinskii, the Feynman diagrammatic technique for double time dependent causal Green's function is established. There is a correct limit of zero temperature and may be used to calculate the various dynamical properties of nonequlibrium processes.</p> <br/>Acta Physica Sinica. 1965 21(4): 858-865. Published 1965-02-05 Author(s): CHANG SHIH-CHUN <br/><p>Starting from the discussion of analytic properties and using the Landau relation to improve the diagrammatic technique of Dzyaloshinskii, the Feynman diagrammatic technique for double time dependent causal Green's function is established. There is a correct limit of zero temperature and may be used to calculate the various dynamical properties of nonequlibrium processes.</p> <br/>Acta Physica Sinica. 1965 21(4): 858-865. Published 1965-02-05 THE FEYNMAN DIAGRAMMATIC TECHNIQUE FOR THE DOUBLE TIME DEPENDENT CAUSAL GREEN'S FUNCTION CHANG SHIH-CHUN 1965-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1965 21(4): 858-865. article doi:10.7498/aps.21.858 10.7498/aps.21.858 Acta Physica Sinica 21 4 1965-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.21.858 858-865 //www.getgobooth.com/en/article/doi/10.7498/aps.21.866 Author(s): SUN TSUNG-TANG, CHAING WEN-CHIA, SHUN LIEN-FONG, MAO TIN-FONG <br/><p>After systematic experimental investigations, the chief factors which influence the sensitivity, stability and resolution of the ESR spectrometer have been ascertained. Effective means of improving these characters have been worked out. As a result, the sensitivity has reached 2.7×10-12M DPPH. (RC = 2sec., microwave power into cavity ≈l0mw.). The resolution has been found to be better than 1×10-4. The baseline stability has been greatly increased. The main drawbacks inherent in this type of spectrometer has also been discussed.</p> <br/>Acta Physica Sinica. 1965 21(4): 866-874. Published 1965-02-05 Author(s): SUN TSUNG-TANG, CHAING WEN-CHIA, SHUN LIEN-FONG, MAO TIN-FONG <br/><p>After systematic experimental investigations, the chief factors which influence the sensitivity, stability and resolution of the ESR spectrometer have been ascertained. Effective means of improving these characters have been worked out. As a result, the sensitivity has reached 2.7×10-12M DPPH. (RC = 2sec., microwave power into cavity ≈l0mw.). The resolution has been found to be better than 1×10-4. The baseline stability has been greatly increased. The main drawbacks inherent in this type of spectrometer has also been discussed.</p> <br/>Acta Physica Sinica. 1965 21(4): 866-874. Published 1965-02-05 EXPERIMENTAL INVESTIGATION AND IMPROVEMENT ON THE FUNDAMENTAL CHARACTERS OF ESR SPECTROMETER WITH FREQUENCY AND MAGNETIC FIELD MODULATION SUN TSUNG-TANG, CHAING WEN-CHIA, SHUN LIEN-FONG, MAO TIN-FONG 1965-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1965 21(4): 866-874. article doi:10.7498/aps.21.866 10.7498/aps.21.866 Acta Physica Sinica 21 4 1965-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.21.866 866-874 //www.getgobooth.com/en/article/doi/10.7498/aps.21.875 Author(s): <br/><p></p> <br/>Acta Physica Sinica. 1965 21(4): 875-879. Published 1965-02-05 Author(s): <br/><p></p> <br/>Acta Physica Sinica. 1965 21(4): 875-879. Published 1965-02-05 1965-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1965 21(4): 875-879. article doi:10.7498/aps.21.875 10.7498/aps.21.875 Acta Physica Sinica 21 4 1965-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.21.875 875-879 //www.getgobooth.com/en/article/doi/10.7498/aps.21.880 Author(s): <br/><p></p> <br/>Acta Physica Sinica. 1965 21(4): 880-883. Published 1965-02-05 Author(s): <br/><p></p> <br/>Acta Physica Sinica. 1965 21(4): 880-883. Published 1965-02-05 1965-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1965 21(4): 880-883. article doi:10.7498/aps.21.880 10.7498/aps.21.880 Acta Physica Sinica 21 4 1965-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.21.880 880-883 //www.getgobooth.com/en/article/doi/10.7498/aps.21.884 Author(s): <br/><p></p> <br/>Acta Physica Sinica. 1965 21(4): 884-888. Published 1965-02-05 Author(s): <br/><p></p> <br/>Acta Physica Sinica. 1965 21(4): 884-888. Published 1965-02-05 1965-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1965 21(4): 884-888. article doi:10.7498/aps.21.884 10.7498/aps.21.884 Acta Physica Sinica 21 4 1965-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.21.884 884-888

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