Journal of the Physical Society of Japan
Online ISSN : 1347-4073
Print ISSN : 0031-9015
ISSN-L : 0031-9015
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Volume 27, Issue 5
Displaying 1-50 of 61 articles from this issue
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  • The 91Zr(p, p′) Reaction at 14.52 MeV
    Yohko Awaya, Kazuhisa Matsuda, Noriyoshi Nakanishi, Shigeru Takeda, Ta ...
    1969 Volume 27 Issue 5 Pages 1087-1093
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1087
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    The excited states in 91Zr have been studied by the inelastic proton scattering at 14.52 MeV. Angular distributions for the elastic scattering and for the sixteen excited states have been obtained. They have been analysed by the optical model and the distorted wave Born approximation calculations. The character of some excited states has been discussed on the basis of analysis.
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  • Dilute Bose System of Hard Spheres
    K. M. Khanna
    1969 Volume 27 Issue 5 Pages 1093-1095
    Published: November 05, 1969
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1093
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    A realistic calculation of the normal-superfluid phase transition temperature of a dilute Bose system of hard spheres is presented. From the finiteness of the transition temperature it is concluded that such an assembly will be stable assembly.
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  • Resolution of the Hierarchy of Many-Body Green’s Functions
    Shigeji Fujita
    1969 Volume 27 Issue 5 Pages 1096-1104
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1096
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    The rigorous evolution equations for the one-body Green’s functions (g>, g<) describing an imperfect gas in a finite volume are not closed (an analogue of B–B–G–K–Y hierarchy for the many-body distribution functions). The analysis of these equations are made in terms of proper connected diagrams. It is shown that in the bulk limit: N(particle number)→∞, Ω(volume)→∞ such that N⁄Ω=constant, these equations can be reduced to the closed equations, which are however, non-linear and non-Markoffian, in contrast to the original hierarchy equations.
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  • Statistical Mechanics of the Finite Ising Model with Higher Spin
    Chikao Kawabata, Masuo Suzuki
    1969 Volume 27 Issue 5 Pages 1105-1111
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1105
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    The partition functions of the finite Ising models of spin S=1, 3/2, 2, 5/2 and 3 have been calculated by a high speed computer. The periodicity condition at the boundaries has been imposed, and only the nearest neighbor interaction has been assumed. The specific heats of these finite systems have been calculated as a function of temperature. The maxima of the specific heat increase proportionally to long N in the two-dimensional Ising model with spin S=1, N being the number of lattice points, which indicates that the specific heat for the above lattice has a singularity such as Cv⁄k∼Alog|T−Tc|+B±: A∼0.10 and B−−B+=0.24. The difference (B+−B−) has been estimated from the asymmetric distribution of the zeros of the partition function in the complex temperature plane.
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  • Theory of Magnetically Dilute Systems
    Takehiko Oguchi, Takeshi Obokata
    1969 Volume 27 Issue 5 Pages 1111-1116
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1111
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    The variation of the critical temperature (the Curie or Néel temperature) of a magnetic crystal randomly diluted with non-magnetic atoms is evaluated as a function of concentration p of magnetic atoms by the effective Hamiltonian method based on the Ising and the Heisenberg models. The specific heat of Ising ferromagnet above the Curie temperature is calculated for various concentrations in order to see the existence of Schottky-type maximum. The critical index of susceptibility and the Curie temperature for diluted ferromagnet is also calculated using Padé approximation to check the idea that the lowering of the Curie temperature with the decrease of p is attributed to the decrease of effective dimensionality of ferromagnetic system.
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  • Dynamical Aspects of Classical Liquids
    Kenji K. Kobayashi
    1969 Volume 27 Issue 5 Pages 1116-1121
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1116
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    The dynamical aspects of non-polar classical liquids are investigated by extending the Kirkwood’s static treatment of the fusion to the dynamical one in a manner quite analogous to the Landau-Vlasov’s formulation of the plasma oscillation.
    The phonon-like collective modes are obtained in the collisionless regime of which velocity is quite different from that of the ordinary sound waves in classical liquids. The dynamical behaviour of liquids near the freezing point is also considered and a non-propagating mode with a critical wave number kc somewhat similar to the entropy fluctuation mode is obtained.
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  • Magnetic Properties of Cr7Te8
    Takasu Hashimoto, Masuhiro Yamaguchi
    1969 Volume 27 Issue 5 Pages 1121-1126
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1121
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    Cr7Te8 exhibits two types of crystal structure according to the difference of thermal treatment; one is the ordered and the other is the disordered arrangements of the vacancies among the successive Cr layers. The saturation moments and the magnetic susceptibilities of both structures are measured in the temperature range from 77°K to 1000°K. It is observed that the magnetic properties depend largely on the arrangements of the vacancies. In addition, at 4.2°K two nuclear magnetic resonance absorption lines are observed at 45.1 and 58.2 MHz in the ordered samples whereas a very broad absorption line is observed in the disordered samples. These absorption lines may be considered as Cr53-signals from the measurements in the external magnetic field. It seems that these magnetic and NMR data are interpreted by the ionic model, though the interpretation includes some degree of incompleteness.
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  • Contribution of s-d Interaction to the Internal Magnetic Field in Heusler Alloys
    Takeshi Shinohara
    1969 Volume 27 Issue 5 Pages 1127-1135
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1127
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    Spin echoes and their external magnetic field effects have been observed on Heusler alloys, Cu2MnAl, Cu2MnIn and Cu2MnSn at 4.2°K. The sign of the internal magnetic field at nuclei of the constituent elements has been determined to be negative, and on the basis of the R–K–K–Y interaction semiquantitative agreement between calculated and observed internal magnetic fields has been obtained in Cu2MnAl, Cu2MnIn and Cu2MnSn. The spectra for Cu, Mn and Sn in Cu2MnSn, In in Cu2MnIn and Al in Cu2MnAl have been observed for the first time.
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  • Electron Spin Resonance of VO2+ Ions in (NH4)2Zn2(SO4)3
    B. V. R. Chowdari
    1969 Volume 27 Issue 5 Pages 1135-1140
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1135
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    The electron spin resonance spectrum of the vanadyl ion (VO2+) is studied in single crystals of (NH4)2Zn2(SO4)3, at room temperature and in the 9.4 KMc/s microwave frequency range. The V–O axes are found to have four possible orientations giving rise to four magnetic complexes. The V–O axes of two magnetic complexes lies in the (\bar110) plane while the axes of the other two complexes lies in the plane perpendicular to (\bar110). The populations in the four possible orientations are in the ratio 4:1:4:1. The complexes with the identical populations are equivalent but for the change in the relative directions of their axes, and hence the four magnetic complexes form into two groups. Futhermore, the vanadyl hyperfine lines show an additional anisotropic structure of five lines which is apparently due to the superhyperfine interaction of the unpaired spins of the transition metal ion, with some of the protons of the surrounding (NH4)+ molecules. All the spectra have been analysed using the spin-Hamiltonian corresponding to rhombic symmetry and the spin-Hamiltonian parameters are presented.
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  • Anomalous Thermal Expansion and Specific Heat of the Ferromagnetic Compound Au4Mn
    Takejiro Kaneko, Minoru Matsumoto
    1969 Volume 27 Issue 5 Pages 1141-1143
    Published: November 05, 1969
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1141
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    The results of measurement of thermal expansion and specific heat are presented for the ferromagnetic compound Au4Mn in the temperature range from room temperature to 430°K which includes the Curie point of this compound (Tc=371°K). Anomalous specific heat at the Curie point is estimated to be ΔCp=1 cal/mol·deg. Anomalous thermal expansion is found to be anisotropic, Δa⁄a<0 and Δc⁄c>0. These results are discussed in connection with the pressure effect to the magnetization and the Curie point.
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  • The Mössbauer Study of the Ferrous Ion in Some Anhydrous Dihalides of Iron-Group Elements
    Toshizo Fujita, Atsuko Ito, Kazuo Ôno
    1969 Volume 27 Issue 5 Pages 1143-1149
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1143
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    The Mössbauer measurements on the ferrous ion in FeBr2, CoCl2 and NiCl2 are presented. Various interaction parameters are estimated from the observed spectra. The effect of anion change on the ferrous ion is discussed, comparing the results on FeBr2 with those on FeCl2 and FeI2 reported previously. The spectra observed below the Néel temperature show that the ferrous spin in CoCl2 is forced to lie in the c plane, whereas that in NiCl2 orients along the c axis which is the direction preferred by the ferrous spin. These can be interpreted in terms of the difference in anisotropy energy of the host spins.
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  • Notes on the Localized Moment of Fe Impurity in Nb–Mo Alloys
    Hiroshi Nagasawa, Nobuhiko Sakai
    1969 Volume 27 Issue 5 Pages 1150-1152
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1150
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    By Mössbauer measurement of enriched Fe57 in Nb.3Mo.7 alloys at high field at 4.2°K and 120°K, the existence of the nonmagnetic Fe impurity in Nb–Mo alloys was observed and from the composition dependence of the effective moment of Fe impurity, it was found that the Fe impurity has a localized moment when it has at least 7 Mo nearest neighbours.
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  • Band Structure of Metals under High Pressure. I. Fermi Surface of Na and K
    Jiro Yamashita, Shinya Wakoh, Setsuro Asano
    1969 Volume 27 Issue 5 Pages 1153-1158
    Published: November 05, 1969
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1153
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    The band structures of b.c.c. Na, b.c.c. K and f.c.c. K in highly compressed states are evaluated by A.P.W. method. The Fermi surface of Na is approximately spherically symmetric even when the volume is reduced to 0.2 of the normal state. On the other hand, the Fermi surface of K changes from a sphere at the normal volume to complicated d-like surfaces with increasing pressure. The observed volume change in resistivity of Na and K would have a deep connection with the volume change of the Fermi surface.
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  • Electrical Resistivity of Gold-Chromium Alloys with High Concentration of Chromium
    Kazuko Inoue, Yoji Nakamura, Nobuhiko Kunitomi
    1969 Volume 27 Issue 5 Pages 1159-1164
    Published: November 05, 1969
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1159
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    The electrical resistivity and the magnetic susceptibility of Au–Cr alloys with high concentration of chromium up to 26 atomic percent have been measured from 4 to 1000°K. The electrical resistivity shows no sharp anomaly but a broad peak above the Néel temperature. In the paramagnetic region, the resistivity decreases with increasing temperature. In order to analyze this anomalous temperature dependence of the resistivity, the magnetic part of the resistivity was estimated by subtracting the resistivity of gold as a phonon contribution from the observed one. It was found that the magnetic resistivity is proportional to −clogT, where c is the chromium concentration and T the temperature. This result seems to be explaind by an extended Kondo effect. On the other hand, a modification of Blatt’s theory is also discussed to explain the decrease of the resistivity.
    A similar decrease in the resistivity with temperature in several noble metal alloys with high concentration of 3d metals and in other alloys containing magnetic atoms with high concentration is also described.
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  • Electrical and Crystallographic Studies of the System CuxNi1−xMn2O4
    S. T. Kshirsagar
    1969 Volume 27 Issue 5 Pages 1164-1170
    Published: November 05, 1969
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1164
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    Electrical and crystallographic properties of the system CuxNi1−xMn2O4 have been studied. The negative deviation of lattice parameters from Vegard’s linearity rule indicates that CuMn2O4 is a normal cubic spinel. The electrical resistivity temperature-behaviour obeys the relation (Remark: Graphics omitted.), and the value of activation energy (ΔE) for conduction in NiMn2O4 remains constant even after addition of 50 mole percent CuMn2O4. The thermoelectric power of NiMn2O4 changes sign from negative to positive by an addition of 20 mole percent CuMn2O4. It is concluded that in CuMn2O4 the Cu is present predominantly in Cu2+ valence state along with a small number of Cu1+ ions at tetrahedral sites. The electrical conduction in this system seems to take place through hopping of charge carriers between Mn3+ and Mn4+ ions at octahedral sites. A contribution to electrical conduction from tetrahedrally located Cu2+ and Cu1+ ions has also been considered.
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  • Considerations of Crystals which are “Antiferroelastic” as well as Paraelectric, Ferroelectric, or Antiferroelectric
    Kêitsiro Aizu
    1969 Volume 27 Issue 5 Pages 1171-1178
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1171
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    In a recent paper, “ferroelasticity” has been defined on the analogy of “ferroelectricity,” mechanical strain and stress in the former corresponding to electric polarization and field in the latter. Just as “antiferroelectricity” is associated with “ferroelectricity,” so is “antiferroelasticity” associated with “ferroelasticity.” It is considered that antiferroelastic crystals are possible. For the purpose of grasping them conceptually and knowing their characteristics and also for the purpose of understanding more deeply ferroelectricity and antiferroelectricity, this paper presents and thermodynamically investigates some model crystals which are antiferroelastic as well as paraelectric, ferroelectric, or antiferroelectric.
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  • Optical and Electrical Properties of Uncolored and Colored Lead Doped Alkali Halides
    S. C. Jain, S. Radhakrishna, K. S. K. Sai
    1969 Volume 27 Issue 5 Pages 1179-1184
    Published: November 05, 1969
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1179
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    The peak position and half-widths of the bands characteristic of lead impurity in four alkali halides, NaCl, KCl, KBr and KI, are reported. Ionic conductivity studies have been made in the temperature range 150–600°C in the four alkali halides doped with Pb. The values of the energy of association of Pb++ with a cation vacancy is ∼0.28 eV.
    The growth rate of F-centers in X-irradiated crystals is found to be slower in all lead doped crystals. On additive or electrolytic coloration the lead band (characterised as the A band) disappears and an intense broad (half-width 2.5 eV) ultraviolet band, besides the F band, is observed. Quenching from temperatures greater than 500°C bleaches the F band and the UV band and a new band peaking at 240–265 nm with half-width 1.4∼1.5 eV is observed in four alkali halides. Preliminary EPR measurements did not show any influence of the lead bands on the EPR results.
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  • Low Temperature Hall Mobility and Magnetoresistance in KCl at High Electric Field
    Fumiko Nakazawa, Hiroshi Kanzaki
    1969 Volume 27 Issue 5 Pages 1184-1191
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1184
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    Hall mobility of photoelectrons in zone refined and additively colored KCl single crystals is found to be so high as 2×104 cm2/volt·sec at 4.2°K and to decrease in proportion to E−0.5 beyond a critical electric field. Corresponding to the mobility decrease, photocurrent is proportional to E0.5 beyond the critical field. Dominant scattering centers at low electric field are concluded to be charged impurities rather than F centers by measurements of Hall effect and magnetoresistance. Polaron transport in KCl crystal is interpreted fairly well by the usual transport theory including hot electron theory. However, two important difficulties become noticeable in applying the usual theory. First, the trapping lifetime of electron is shorter than the scattering time. Secondly, photocurrent saturation is not observed even under very high electric field at which drift velocity of electron is much higher than the thermal velocity and emission of optical phonon is expected to occur appreciably.
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  • Vibration-Assisted Absorption (B Band) in Alkali Halide-Thallium Crystals
    Taiju Tsuboi, Riso Kato
    1969 Volume 27 Issue 5 Pages 1192-1196
    Published: November 05, 1969
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1192
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    Absorption spectra of the B bands in alkali halide-thallium crystals have been investigated over the temperature range from 10°K to 300°K in KI–Tl, KBr–Tl and KCl–Tl. The integrated absorption intensities of the bands can be fitted well by coth (hνq⁄2 kT) law which is derived from the theory of the vibration-assisted absorption. Correlation between absorption intensities of the B and C bands with the variation of temperature was found, and it is concluded that the absorption intensity of the B band is supplied from the C band.
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  • Effect of Doping on the Electron Spin Resonance in Phosphorus Doped Silicon. IV. Experimental Study at Liquid Helium Temperature
    Hiroshi Kodera
    1969 Volume 27 Issue 5 Pages 1197-1203
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1197
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    Electron spin resonance experiments on phosphorus doped silicon were carried out at liquid helium temperature in order to know the origin of the absorption line observed at the center of the hyperfine structure. The shape of the central line was Lorentzian. The line width showed minimum against the phosphorus concentration, while the g-value was constant. Resonance behaviors of the central line were different in following respects from those of hyperfine lines; (1) g-value, (2) concentration dependence of line width, (3) line shape, and (4) saturation behavior. These results were discussed in connection with the electrical conduction and temperature dependence of resonance parameters. A tentative model was proposed that the central line was assigned to the free electron in impurity clusters formed through the local enhancement of impurity concentration.
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  • Characteristic Energy Loss Spectra of II–VI Compounds
    Toshimasa Tomoda, Michi-hiko Mannami
    1969 Volume 27 Issue 5 Pages 1204-1207
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1204
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    Characteristic electron energy loss spectra of some II–VI compounds, ZnS, ZnSe, ZnTe, CdS and CdSe, were measured up to about 25 eV by transmission of 40 keV electrons and compared with the energy loss function −Im[ε(ω)−1] calculated from optical measurements. Good agreements between them were found in the peaks from 0 eV to about 13 eV.
    Some of the characteristic energy losses were explained; losses at about 11∼12 eV are due to the excitations of the valence electron plasmons, those at about 14 eV and those at about 17 eV are due to the excitations of cation d electrons and of anion s electrons respectively.
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  • Spin-Phonon Interaction in Li-Doped Si
    Katsuo Suzuki, Nobuo Mikoshiba
    1969 Volume 27 Issue 5 Pages 1207-1211
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1207
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    A theory is given for the spin-phonon interaction in Li-doped Si, where Li donors have an “inverted” Group-V-like ground state. It is shown that the Hasegawa-Roth mechanism of spin-phonon interaction for the “normal” Group-V-like ground state is too small to explain the ultrasonic spin resonance (USR) observed by Wigmore. The spin-phonon interaction via the impurity spin-orbit coupling gives rise to a sufficiently strong attenuation of ultrasonic waves in qualitative agreement with the experiment of USR. It is pointed out that the complicated structure observed in USR is due to the effect of random strains in the crystal.
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  • Induced Absorption Band in the N Region of LiF Crystals by Charged Particle Irradiation at Liquid Nitrogen Temperature
    Tomoyoshi Kamikawa, Kunio Ozawa
    1969 Volume 27 Issue 5 Pages 1212-1216
    Published: November 05, 1969
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1212
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    Single crystals of lithium fluoride have been irradiated with deuterons or protons at liquid nitrogen temperature. In absorption spectra of the crystals immediately after irradiation, a band is observed at 542 nm in addition to the F and M bands. This band has an almost constant intensity during warming from LNT to RT. It is obscured by the other overlapping bands when the crystal is heated about 100°C or when this is aged at RT for a long time. The nature of this band is examined in connection with the so-called N2 band, Farge’s I band and Vander Lugt’s Nc band. The following relation is believed to be most plausible: The observed absorption band is identified with the I band. The N2 band is identified with the Nc band but may not be identified with the I band.
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  • Microwave Harmonic Generation in Semiconductors at Low Temperatures. II. Silicon
    Ryozo Yoshizaki, Takeshi Kamiya, Shoji Tanaka
    1969 Volume 27 Issue 5 Pages 1216-1228
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1216
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    A resonance type third harmonic generation (THG) in a magnetic field is observed in n-type silicon under illumination at liquid helium temperatures as in the case of n-type germanium (T. Kamiya et al.: J. Phys. Soc. Japan 27 (1969) 679). A photo-response of the THG is investigated in detail, and the THG shows complicated decay below 2°K after the illumination. This shows that the resonance type THG arises from the multiphoton resonance of electrons in very shallow trapping states. A phenomenological analysis of the complicated dacay is made based on a model, in which there are two series of energy levels in the trapping center, and the thermal ionization energies are obtained to be 0.63±0.13 meV and 0.42±0.07 meV for each ground state. This result seems to indicate that the observed trapping center is attributed to the donor negative ion (D−). Another experiment on thermally stimulated current (TSC) in n-type silicon is carried out below 1°K, and the depth of the trapping state obtained is almost the same as that observed in the THG experiment.
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  • As75 and Cs133 Quadrupole Interactions in Ferroelectric CsH2AsO4
    L. C. Gupta
    1969 Volume 27 Issue 5 Pages 1229-1234
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1229
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    Quadrupole coupling parameters of As75 and Cs133 have been studied in a single crystal of CsH2AsO4 (ferroelectric Curie point Tc=143°K). As75 resonance could not be observed below 153°K. The temperature coefficient of As75 quadrupole coupling constant exhibits an anomalous behaviour. Cs133 resonance was seen in the ferroelectric phase also. The average of the two EFG tensors corresponding to the two physically nonequivalent Cs-sites in the ferroelectric state is exactly equal to the EFG tensor in paraelectric phase. The EFG tensors in ferroelectric phase are diagonal in the crystal-fixed x(a), y(b) and z(c) frame of reference and therefore no further splitting was observed due to domain effects. These results have been discussed using the dynamic model of ferroelectricity of KH2PO4-type crystals in which proton tunneling motion is coupled with optical mode of [K–PO4] lattice vibration.
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  • Deformation Twinning in an Age-Hardened Cu-4 wt % Ti Alloy
    Kazuo Saito
    1969 Volume 27 Issue 5 Pages 1234-1245
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1234
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    Deformation twinning in a Cu-4% Ti alloy was studied on polycrystalline specimens age-hardened by the formation of a modulated structure. The twinning stress in the hardest specimen was found to decrease with raising the deformation temperature from −40°C to 250°C.
    Thin foil observations revealed that the number of twins increased as the deformation increased and in several cases two sets of twins intersected each other, creating a secondary twin inside the intersected twin.
    A dislocation model for twinning is proposed to interpret the temperature dependence of the twinning stress observed in the present alloy. Behaviors of intersection between twin and twin or slip dislocations are discussed in terms of the dislocation reactions at the twin boundaries.
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  • Diffuse Scattering of Electrons by Defect in Crystal. I. General Formulation and Application to Guinier-Preston Zone
    Toshio Okabe, Katsuhiko Hasebe, Michi-hiko Mannami
    1969 Volume 27 Issue 5 Pages 1245-1253
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1245
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    Theoretical formulation of diffuse scattering of electrons by defect in crystal based on the perturbation calculation is presented. This formulation is applied to the diffuse streaks in the electron diffraction patterns from the Guinier-preston zone in Al–Cu alloy. As the result of the analysis, a model of the Guinier-Preston zone in Al–Cu alloy is proposed.
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  • Normal and Abnormal Absorption Coefficients of X-Rays
    Hisatake Sano, Kazuo Ohtaka, Yoshi-Hiko Ohtsuki
    1969 Volume 27 Issue 5 Pages 1254-1261
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1254
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    The normal and the abnormal absorption coefficients of X-rays due to the Compton scattering and the thermal diffuse scattering (TDS) are calculated numerically by taking into account the temperature effect. It is found that effects of both scatterings are comparable for light atoms such as Al and Si, and that the effect of the latter is larger than the former for heavier atoms.
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  • The Dipole-Polarization Potential in H2-Electron System
    Shunsuke Hara
    1969 Volume 27 Issue 5 Pages 1262-1267
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1262
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    The adiabatic polarization potential in the system of a hydrogen molecule and an electron is calculated by a variation perturbation method in two-center prolate spheroidal coordinates. In this calculation, a 16-term James-Coolidge type wave function is used for obtaining the dipole contribution to the potential. This is the first detailed calculation of the polarization potential of a diatomic molecule in two-center coordinates.
    The asymptotic forms of the dipole polarization potential in the direction parallel and perpendicular to the molecular axis are −5.975⁄5r4 and −4.359⁄2r4 in atomic units, respectively. The numerators of these asymptotic forms are to be compared with the exact values of the dipole polarizabilities 6.38049 and 4.55769 a. u. obtained by Kolos and Wolniewicz.
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  • Piezoelectricity in Helical Polymer Chains
    Kenji Kasai
    1969 Volume 27 Issue 5 Pages 1268-1274
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1268
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    Piezoelectric effect has been observed by a number of investigators in the uniaxially orientated helical polymers, in which the piezoelectric polarization appears perpendicular to the shearing plane. To explain this, the piezoelectric polarization is theoretically treated for a distorted helical polymer chain with effective charges or dipole moments on the main chain. The piezoelectric effect occur only in an optical shear mode of lattice vibration along the helical axis. As examples, the piezoelectric polarization is calculated in polyoxymethylene-type helical chain and quasi-polypeptide-type one.
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  • Heilter-London Calculation on Complex FeF63−. I. 6A1 (High Spin) State
    Yasunobu Seno
    1969 Volume 27 Issue 5 Pages 1274-1292
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1274
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    The wave function of the ground 6A1 state of the complex FeF63− has been calculated in the Heitler-London scheme with configuration interactions. Our basic configurations are constructed from the eigenfunctions of free ions (Fe3+, Fe2+, Fe−) and of free atom F. The Hamiltonian matrix elements have been calculated according to the method of “Atoms in Molecules”, where the empirical atomic energies are inserted appropriately into the matrix elements. As the large ionization energy of Fe2+ ion (30.64 eV) decreases the excitation energies of the charge transfer configurations, the polarization energy associated with electron transfer becomes a relatively important factor. We have checked the ground state wave function by comparing the calculated hyperfine spin densities and the crystal field splitting parameter 10Dq with the experimental data. Satisfactory agreements between the calculated and observed quantities have been obtained. Some qualitative discussions on the quartet states are also given.
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  • Vibrational Excitation of CO by Slow-Electron Collision
    Yukikazu Itikawa, Kazuo Takayanagi
    1969 Volume 27 Issue 5 Pages 1293-1300
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1293
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    The cross section for the vibrational excitation v=0→1 of CO by slow-electron collisions is calculated using the close-coupling method. First, only the dipole interaction is considered to give rise to the vibrational transition and the result is compared with the Born calculation; it is found that the Born approximation gives a rather poor result in the present case. Next, the polarization effect of the molecule is taken into account. The contribution from the polarization term is shown to be comparable to that from the dipole interaction. Finally, the excitation cross section is evaluated by including both the dipole and the polarization interactions, and a comparison is made with experimental data.
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  • Collisional Transfer of Triplet Excitations between Helium Atoms
    Mitsuhiko Kodaira, Tsutomu Watanabe
    1969 Volume 27 Issue 5 Pages 1301-1309
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1301
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    The cross sections for 23S and 23P excitation transfer processes between He atoms are calculated by the perturbed stationary state method. The potential energy curves for He(11S)+He*(23P) and He(11S)+He*(23S) systems are obtained by the Heitler-London method taking the configuration interaction between them into account. The calculation involves the transfer, the diffusion and the total elastic cross sections. The results show that the transfer cross section for 23P is 15∼23πa02 at thermal energy and larger than that for 23S. The transfer cross section for 23S does not so much differ from the calculation using rigorous potentials by Kolker and Michels [J. chem. Phys. 50 (1969) 1762].
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  • Structural Model of the Hydrated Electron. III
    Makoto Natori
    1969 Volume 27 Issue 5 Pages 1309-1319
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1309
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    The tetrahedron model in the previous papers is used for the electron binding in water and in ice crystal. The wave function of the hydrated electron is refined and orthogonalized to the wave functions of the neighbouring water molecules. The energy levels, the oscillator strength, the ESR hyperfine splitting constant and the ESR line width have been calculated. The agreement with the experimental data is satisfactory. The shape of the water molecule and the size of the tetrahedron in liquid water are considered to be different from those in ice crystal. The broadness of the optical absorption spectrum and the dependence of the peak of the spectrum on temperature and pressure are also explained by this model.
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  • Excluded Volume Effect and Light Scattering of Chain Polymers
    Ryuzo Koyama
    1969 Volume 27 Issue 5 Pages 1319-1324
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1319
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    The light scattering by chain polymers with excluded volume effect is calculated approximately, by assuming the same expansion coefficients of polymer subchains with those used in the previous excluded volume theory.
    The scattering function obtained which represents the angular distribution of scattered light intensity is a decreasing function of the molecular expansion coefficient α.
    This function contains an adjustable parameter μ0 which determines the expansion coefficient of adjacent segments-distance. When this is put as μ0=2, the scattering function coincides with that of Debye, and Zimm and others for uniformly expanded random coil chain, and in the other extreme case where μ0=0, the result is qualitatively equivalent to the previous calculation for non uniformly expanded random coil. Also when the value μ0=4⁄3∼3⁄2 which is obtained from the excluded volume theory is substituted, the result is closer to former one for uniformly expanded random coil.
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  • Magnetic Surfaces and Drift Surfaces of Average Min. B Stellarator Field
    Kenro Miyamoto
    1969 Volume 27 Issue 5 Pages 1325-1330
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1325
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    Magnetic surfaces and drift surfaces of single charged particle of an average min. B stellarator field proposed by Taylor are analysed by using an average method. The dependency of the well depth and the rotational transform angle on the parameters of the field configuration is examined. The deviation of the drift surfaces of untrapped particles from the magnetic surfaces is studied and it is derived that the deviation is approximately equal to the deformation of the magnetic surface due to the application of an equivalent vertical field.
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  • Oblique Nonlinear Hydromagnetic Waves in a Collision-Free Plasma with Isothermal Electron Pressure
    Takuji Kawahara
    1969 Volume 27 Issue 5 Pages 1331-1340
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1331
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    Hydromagnetic waves of small but finite amplitude propagating at an arbitrary angle to a magnetic field in a collision-free plasma with isothermal electron pressure are investigated on the basis of a nonlinear perturbation method.
    It is shown that in the lowest order of perturbation the system of the basic equations can be reduced to two types of the Korteweg-de Vries equations which describe the fast and slow magneto-acoustic waves. Another nonlinear dispersive equation can be obtained for the Alfvén wave. The effect of the isothermal electron pressure on the structure of the waves is discussed in detail. Necessary conditions for the existence of the solitary waves in the plasma under consideration are also given.
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  • A Nonlinear Theory of Two-Stream Instability
    Tsuguhiro Watanabe
    1969 Volume 27 Issue 5 Pages 1341-1350
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1341
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    The nonlinear development of the two-stream instability in a system of two electron beams with finite temperature is investigated by a perturbation method using macroscopic plasma equations. The equation for the change of amplitude is obtained and shown to be reduced to a nonlinear Schrödinger equation. From this equation it is shown that
    (1) a range of wavenumbers exists for which the nonlinearity suppresses the instability before the onset of overtaking and after reaching the limiting amplitude the wave begins to decay.
    (2) and that a modulational instability is possible.
    The analytical results are compared with direct computer solutions which support the theory.
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  • Viscous Flow near the Trailing Edge of a Semi-Infinite Flat Plate Set in the Middle of a Moving Channel
    Akira Yoshizawa
    1969 Volume 27 Issue 5 Pages 1350-1355
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1350
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    A model flow is studied in order to investigate the nature of the viscous flow near the trailing edge of a flat plate: in the middle of a moving channel with constant velocity, which is filled with viscous fluid, a semi-infinite flat plate at rest extends to upstream infinity, and the flow tends to the Couette flow upstream. The model seems to have such features as the viscous flow past a finite flat plate does near the trailing edge.
    Analytical and numerical solutions are obtained at low and moderate Reynolds numbers, respectively, and it is concluded that the trailing edge is a singular point in the flow field, i. e.,
    Cf∼Ax1−1⁄2 as x1→0,
    where Cf is the local skin-friction coefficient, A a certain function of the Reynolds number and x1 the distance measured along the flat plate from the trailing edge.
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  • Magnetic Anisotropy of β-MnZn
    Tomiei Hori
    1969 Volume 27 Issue 5 Pages 1356
    Published: November 05, 1969
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1356
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  • Frequency Dependence of Current Relaxation Time in an Electron-Impurity System
    J. P. Riley, C. C. Chen, S. Fujita
    1969 Volume 27 Issue 5 Pages 1357-1358
    Published: November 05, 1969
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1357
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  • Anomalies in the Electrical Resistivity and Thermoelectric Power of Manganese Phosphide Single Crystal in High Magnetic Field
    Eiji Narita, Takashi Suzuki, Eiji Hirahara
    1969 Volume 27 Issue 5 Pages 1358-1359
    Published: November 05, 1969
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1358
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  • Temperature Dependence of the NMR Satellite Lines in Ferromagnetic Co-Dilute Alloys
    Takashi Oono, Junkichi Itoh
    1969 Volume 27 Issue 5 Pages 1359
    Published: November 05, 1969
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1359
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  • Antiferromagnetic Resonance in NiBr2
    Koichi Katsumata, Muneyuki Date
    1969 Volume 27 Issue 5 Pages 1360
    Published: November 05, 1969
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1360
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  • Curious Behavior of the Electrical Resistivity of the Laves Phase Compound Fe2Ti
    Kôki Ikeda, Takurô Nakamichi, Mikio Yamamoto
    1969 Volume 27 Issue 5 Pages 1361
    Published: November 05, 1969
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1361
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  • Periodic Displacements of Atoms in Binary Alloys with Anti-Phase Domains
    Kiyohito Okamura
    1969 Volume 27 Issue 5 Pages 1362
    Published: November 05, 1969
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1362
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  • Temperature Shift of the Fe57 Mössbauer Line in the Quenched Al-0.01% Fe Alloy
    Saburo Nasu, Michitaka Nishio, Yutaka Tsuchida, Yotaro Murakami, Teruy ...
    1969 Volume 27 Issue 5 Pages 1363
    Published: November 05, 1969
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1363
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  • H2O Laser Cyclotron Resonance of n-type Indium Antimonide
    Kazuo Murase, Keisuke Kobayashi, Eizo Otsuka
    1969 Volume 27 Issue 5 Pages 1364
    Published: November 05, 1969
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1364
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  • Pyroelectricity in Solid Hydrogen Chloride
    Tadashi Kobayashi, Mitsuo Ida, Shuji Kawada
    1969 Volume 27 Issue 5 Pages 1365
    Published: November 05, 1969
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1365
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  • Electrical Properties of the V3O5 Single Crystals
    Hideyuki Okinaka, Koichi Nagasawa, Koji Kosuge, Yoshichika Bando, Tosh ...
    1969 Volume 27 Issue 5 Pages 1366-1367
    Published: November 05, 1969
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.27.1366
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