Journal of the Physical Society of Japan
Online ISSN : 1347-4073
Print ISSN : 0031-9015
ISSN-L : 0031-9015
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Volume 34, Issue 6
Displaying 1-49 of 49 articles from this issue
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  • Average Energy per Ion Pair for Alpha Particles in Vapours of Several Dielectric Liquids
    Takeyoshi Nakayama
    1973 Volume 34 Issue 6 Pages 1431-1436
    Published: June 05, 1973
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1431
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    The W-values for alpha particles in several kinds of vapours have been determined. A cylindrical ionization chamber of inside diameter 20 cm and length 55 cm was used for measurements. Alpha particles emitted from 210Po source entered to the ionization chamber through a collimator with mylar window. The vapours, were obtained from highly purified samples for spectroscopy. For the vapours, relative measurements with argon, nitrogen, and dried air as standard gases have been carried out. The W-values obtained within about 3 percent error for the vapours of n-hexane, cyclohexane, benzene, carbon disulphide, dichloromethane, and carbon tetrachloride were 29.1±0.5, 28.1±0.6, 30.9±0.7, 26.0±0.5, 26.8±0.5, and 28.7±0.7 eV, respectively. These W-values were somewhat large in comparison with those for electrons.
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  • Gamma-Ray Energies and Relative Intensities of 75Se, 108mAg, 113Sn, 131I and 133Ba
    Hikaru Inoue, Yasukazu Yoshizawa, Tsuneo Morii
    1973 Volume 34 Issue 6 Pages 1437-1442
    Published: June 05, 1973
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1437
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    Gamma-ray energies lower than 500 keV and relative intensities have been precisely measured with Ge(Li) detectors. Many experimental effects such as the source position effect, the counting rate effect, the room temperature effect, etc. are examined. Results are as follows: 303.916±0.012 and 400.624±0.030 keV for 75Se; 433.932±0.014 keV for 108mAg; 255.126±0.010 (3.33±0.13) and 391.686±0.027 keV (100) for 113Sn; 364.456±0.031 keV for 131I; 161 (0.98±0.07), 223 (0.76±0.05), 276 (11.6±0.5), 302.839±0.008 (29.6±1.1), 355.999±0.024 (100) and 383.841±0.027 keV (14.9±0.6) for 133Ba. Parentheses show relative intensities.
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  • Decay of 151Nd
    Takeshi Seo, Takeo Hayashi, Tohru Mitamura
    1973 Volume 34 Issue 6 Pages 1443-1451
    Published: June 05, 1973
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1443
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    The level structure of 151Pm has been studied through the measurements of γ- and β-rays from the decay of 12 min 151Nd. Among many excited levels of 151Pm presented in the previous papers, 13 levels have been confirmed and 16 new levels have been introduced. Spin and parity assignments for several levels in the medium- and higher-energy regions are proposed. In the lower-energy region the third members of the 5/2(413) and 3/2(411) bands and in the medium-energy region two members of the 3/2(541) band have been newly detected.
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  • Transport and Thermodynamic Analyses of Steady-State Currents in Solids
    A. T. Fromhold, Jr., S. R. Coriell, J. Kruger
    1973 Volume 34 Issue 6 Pages 1452-1459
    Published: June 05, 1973
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1452
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    The usual derivation of the well-known Gibbs-Duhem relation (or its electrochemical analog) from equilibrium thermodynamics is based on certain assumptions which are only approximately met for nonhomogeneous systems; the postulate of local equilibrium generally employed in nonequilibrium thermodynamics is commonly utilized to extend the results to the nonequilibrium domain. The application of the electrochemical Gibbs-Duhem relation to the particular case of several charged diffusing species in a solid is utilized herein to obtain an expression for the local electric field which is then compared with an expression for the field deduced by an ordinary phenomenological transport analysis. The two approaches yield consistent results only in the limit of thermodynamic equilibrium. Implications of the analyses are pointed out for the special problem of the growth of oxides and similar tarnish films on metals.
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  • Observation of Critical Fluctuations in Negative-Resistance Oscillation
    Tatsuyuki Kawakubo, Shigeharu Kabashima, Katsuyuki Nishimura
    1973 Volume 34 Issue 6 Pages 1460-1461
    Published: June 05, 1973
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1460
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  • On Modulated Waves in a Disordered Anharmonic Chain
    Akira Tsurui
    1973 Volume 34 Issue 6 Pages 1462-1466
    Published: June 05, 1973
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1462
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    Properties of modulated waves in a disordered anharmonic chain with symmetric potential are examined by the use of a perturbation method. Under the assumption that the effect of impurities is considerably small, a basic equation to describe behaviours of the modulated waves is obtained. On the basis of this equation the decay process of an envelope solitary wave is discussed. It seems that the main decay process is the excitations of localized mode vibrations due to the impurities.
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  • Velocity Fluctuations of Charged Particles in the Presence of Magnetic Field
    Karmeshu
    1973 Volume 34 Issue 6 Pages 1467-1471
    Published: June 05, 1973
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1467
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    The Brownian motion of charged particles in the presence of magnetic field is extended to incorporate the hydrodynamic after effects. The results for the diffusion coefficient in the transverse and longitudinal directions are obtained. The time development of the mean square displacement of the Brownian particle is also calculated.
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  • Magnetic Properties of Pseudo-Iron Fe1−x (Cr0.5Ni0.5)x Ternary Alloys
    Soji Ohara, Sigehiro Komura, Takayoshi Takeda
    1973 Volume 34 Issue 6 Pages 1472-1476
    Published: June 05, 1973
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1472
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    The magnetic moment and the Mössbauer spectra of Fe57 nucleus for Fe1−x(Cr0.5Ni0.5)x have been measured at room temperature. The electric resistivities for the same alloys have been measured at various temperatures. From these measurements we have discussed the validity of a rigid band model in the series of bcc iron alloys. In these alloys, despite of the constant number of 3d electron, the average magnetic moment per atom decreases with x. These facts are considered to be an evidence for the violation of the rigid band model for these alloys. From the measurement of the distribution of the internal field and the concentration dependence of the electric resistivity at room temperature, the distribution of magnetic moments of iron atoms has been discussed.
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  • Spin Wave Theory of Antiferromagnetic Resonance in the System of Spins Canted by External Magnetic Fields
    Sadamichi Maekawa
    1973 Volume 34 Issue 6 Pages 1477-1485
    Published: June 05, 1973
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1477
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    The temperature dependence of antiferromagnetic resonance (AFMR) frequency, with an external field in the easy plane, is studied on the basis of spin wave theory. It is shown that in this system at low temperatures, the temperature dependence is caused by the following three effects in the same order of the 1/S expansion; (i) the temperature dependence of the angle of sublattice moments canted by the external field, (ii) the first order effect of four magnon processes, and (iii) the second order effect of three magnon processes. The contributions of these effects to the frequency of the lower (field-sensitive) mode are calculated. The two effects, (i) and (ii), almost cancel out each other. The third effect leads to a strong temperature dependence. Such a strong temperature dependence has not been expected by the conventional molecular field theory. Numerical calculations of the AFMR frequency shift of EuTe are carried out on the basis of our theory. The calculations are in agreement with the experimental results obtained by Nakai and Hirahara.
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  • Theory of Two-Magnon Bound States in a Two-Dimensional Antiferromagnet
    Takehiko Oguchi, Takuma Ishikawa
    1973 Volume 34 Issue 6 Pages 1486-1490
    Published: June 05, 1973
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1486
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    Two-magnon bound states are calculated for an antiferromagnetic spin system of the square lattice by the method developed by one of the authors in a previous paper. The calculations are carried out for the two cases; the total wave number Kx=Ky=0, and Kx=Ky=π⁄2. In both cases, two-magnon bound states exist in the Ising model, but they merge with the band as the anisotropy of exchange interactions, decreases, and there are no bound states in the Heisenberg model. The difference between the existence of two-magnon bound states in a ferromagnet and in an antiferromagnet is discussed.
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  • Cr3+ Ion Pair Spectrum in Ruby
    Masayoshi Naito
    1973 Volume 34 Issue 6 Pages 1491-1502
    Published: June 05, 1973
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1491
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    The optical spectrum due to the exchange coupled Cr3+ ions in ruby has been studied theoretically. The effect of the lowering of the Cr3+ site symmetry due to the formation of a pair was taken into account. For the 2nd neighbor pair, a good fitting of the excited state energies between theory and experiment was obtained. The effect of the higher order exchange is found to be very important for this pair. It is also found that the deviation of the Cr3+ site symmetry from C3 is rather large for this pair. For the 4th neighbor pair, the level diagram of the excited state was obtained and the absorption intensities were calculated. Most of the observed lines in this pair are explained by this theory. The lines so called N1 and N2 are found to be the transitions due to the exchange induced electric dipole.
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  • Theory of the Anomalous Skin Effect in a Metal Film. II. —Anomalous Penetration into Normal and Superconducting Films—
    Noboru Takimoto
    1973 Volume 34 Issue 6 Pages 1503-1519
    Published: June 05, 1973
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1503
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    Anomalous penetration of electromagnetic waves through a metal film (thickness L) in the absence of a static magnetic field is studied. The characteristics of the penetration depend in an essential way on the structures of the Fermi surface. In particular, the phase of the transmitted wave takes the form exp(iωL⁄u) with u an extremum electron velocity normal to the film. Diffuse scattering of electrons at the film surfaces enhances the penetration remarkably. The same problem in a type-I superconductor is also studied. For kBT<<Δ<<hω, the anomalous penetration is produced by pairs of excitations, and the phase is given by exp[i(ωL⁄u)×{1−2(Δ⁄hω)2}]. Anomalous penetration of a static magnetic field into a metal in the normal and superconducting state is considered in passing. Besides quantum oscillations which are a magnetic analogue to the Friedel oscillations, there appears in the superconducting state a different component produced by the correlation between pairs of electrons.
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  • A Calculation of the Electronic Structure of an Impurity Atom of Non-Transition Element in Transition Metals —The Nuclear Spin-Lattice Relaxation Time of an Impurity Atom (Al and Cu) in Pd—
    Kiyoyuki Terakura, Junjiro Kanamori
    1973 Volume 34 Issue 6 Pages 1520-1529
    Published: June 05, 1973
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1520
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    Kohzuki and Asayama have shown that the nuclear spin-lattice relaxation time T1 of Al in Pd1−xAlx in the range of small x(<0.03) becomes about 10 times as long as that of pure Al and in the case of Pd1−xCux, T1 of Cu does not change appreciably in the whole range of x. These data are analysed in this paper by carrying out ab initio calculations of the electronic structure of a single impurity atom in Pd. It is shown that T1 of Al nucleus is determined mainly by the contact interaction with conduction electrons. The increase of T1 is a direct result of the reduction of the density of electrons with the Fermi energy at the impurity nucleus, ρs(0, EF), which arises from the fact that the Fermi level is situated at the valley between the bonding and antibonding states of the s states at the impurity site with the host d band. On the other hand, in the case of an impurity atom of Cu in Pd, the orbital relaxation, which can be neglected in pure Cu, compensates the decrease of the relaxation rate due to the contact interaction. The calculated T1’s agree semiquantitatively with those obtained experimentally in both cases of Al and Cu. Some other data of T1 of impurity nuclei in various transition metals are also discussed.
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  • Excitation of Trapped Electrons in SbSI
    Katsuhiro Irie
    1973 Volume 34 Issue 6 Pages 1530-1535
    Published: June 05, 1973
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1530
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    The photoconductive and photo-diffusion effect of SbSI is investigated. The photocurrent and the short-circuit photovoltaic current depend not only on the photon energy but also on the polarization of the incident light. The photon energy showing the peak value of the photocurrent for the polarized light perpendicular to the c-axis is 0.05 eV higher than that for the polarized light parellel to the c-axis in both paraelectric and ferroelectric phases. The polarity reversal of the short-circuit photovoltaic current is observed.
    From the results, it is suggested that there is the trap level at about 1.9 eV below the bottom of the conduction band and that the maximum photocurrent at around 1.9 eV is induced by the excitation of trapped electrons, while the photocurrent at a higher photon energy is induced by the generation of holes.
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  • Defect Formation by N++ Ion Bombardment in LiF and NaF
    Kazuko Kubo, Yukio Kazumata, Hiroshi Tomimitsu
    1973 Volume 34 Issue 6 Pages 1536-1540
    Published: June 05, 1973
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1536
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    The F-light absorption was measured in LiF and NaF single crystals bombarded by 0.7 MeV N++ ions from a Van de Graaff accelerator. The growth curves showed a maximum, from which the F-center concentration at the saturation was estimated to be 7.6 and 3.8×1019 F-centers/cm3 in LiF and NaF, respectively. The rates of production, 3020 and 1210 F-centers/N++ ion, and the formation energies of an F-center, 232 and 578 eV, were determined from the initial portions of the growth curves in LiF and NaF, respectively. The formation of metallic film on the bombarded surface and other imperfections as the result of radiation damage are discussed, referring also to the micrographic observations. It is thus concluded that the damage by N++ ions is fairly severe; the double charge is possibly responsible for this phenomenon.
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  • Phonon Build-Up through A. C. Fields in CdS
    W. J. Heaney, B. V. Paranjape
    1973 Volume 34 Issue 6 Pages 1541-1547
    Published: June 05, 1973
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1541
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    Using the approach of Yamashita and Nakamura we consider the effect of induced phonons on the current arising from an applied A. C. field in a piezoelectric semiconductor. We restrict the calculation to the region where the amplitude of the drift velocity of the electrons is less than the velocity of sound. We find that for CdS at 30 K there is a critical frequency of the applied field ωc−108 sec−1, such that the amplitude of the drift current is constant for ω<<ωc and drops to another constant value for ω>>ωc. We find that the current lags behind the applied field with a phase which has a maximum in the neighbourhood of ωc.
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  • Galvanomagnetic Effects in p-Type Tellurium at Low Temperatures. III. — Impurity Band Conduction and Negative Magnetoresistance in Sb-Doped Crystals —
    Kôki Takita, Takaaki Hagiwara, Shoji Tanaka
    1973 Volume 34 Issue 6 Pages 1548-1560
    Published: June 05, 1973
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1548
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    Galvanomagnetic effects of Sb-doped tellurium were investigated in the wide temperature range from 77 K to 0.05 K under the magnetic fields up to 18 kOe. The hole concentrations of the samples were ranging from 4.2×1015 cm−3 to 1.5×1016 cm−3. Temperature dependences of the conductivity and the weak field Hall coefficient of the samples with holes of 4.2∼7.2×1015 cm−3 indicated the occurrence of the impurity band conduction below 1.2 K. The magnetic field dependences of the Hall coefficient and the magnetoresistances of the samples with holes of 4∼5×1015 cm−3 depended on the directions of the current and the magnetic field below 1.2 K, which might be attributable to the anisotropic acceptor wave functions. In the sample with holes of 1.5×1016 cm−3, the experimental data indicated that the Fermi level was located in the valence band below helium temperatures. Rather large negative magnetoresistances were observed below 1.2 K both in the impurity band conduction region and in the degeneracy region. Discussion is given on the origin of the negative magnetoresistances in the light of the detailed knowledge of the peculiar structure of the valence band and the acceptor state of tellurium.
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  • Shift of Curie Temperature of Barium Titanate Due to Two-Dimensional Pressure
    Mitsuhiko Hayashi
    1973 Volume 34 Issue 6 Pages 1561-1562
    Published: June 05, 1973
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1561
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    Shift of the Curie temperature of barium titanate due to a two-dimensional pressure perpendicular to the ferroelectric axis was studied. The observed rate of shift of the Curie point is 13.8±1.5°C/kbar. This result is in reasonable agreement with the predictions of the Clausius-Clapeyron equation and the phenomenological theory of ferroelectrics. Measurements with and without dc bias voltage applied to the crystal have shown that domain structure, which exists in zero bias, causes an erroneous result.
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  • Isotope-Induced Far-Infrared Absorption in NaCl and KCl Crystals
    Mikihiko Ikezawa, Keiichiro Nasu
    1973 Volume 34 Issue 6 Pages 1563-1566
    Published: June 05, 1973
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1563
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    Band-mode absorption induced by natural isotopes in NaCl and KCl has been measured at 1.8 K in the region of the energy of the acoustic phonon. Absorption peaks, which arise from van Hove singularities, have been observed at 116.8, 122.6 and 145 cm−1 in NaCl, and at 108.2 and 117.0 cm−1 in KCl. The observed absorption spectra are compared with calculated absorption constants which are computed by the theory of Klein and Macdonald with the aid of available data of the shell model of the crystals. Good agreements have been found.
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  • Ferroelectric and Ferroelastic Phase Transformations in Which the Soft Waves Have a Wavelength Equal to a General Rational Number Times the Lattice Constant
    Kêitsiro Aizu
    1973 Volume 34 Issue 6 Pages 1567-1574
    Published: June 05, 1973
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1567
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    Ferroelectric phase transformations and ferroelastic ones in which the soft vibration modes have a wavelength equal to a general rational number λ/μ (λ, μ: integers) times the relevant lattice constant are theoretically investigated. As an example it is assumed that the space group of the prototypic phase is Pnam and that the wave normal of the soft vibration modes is perpendicular to the symmetry planes n. It is found out how λ and μ influence the dielectric and elastic properties and the space group of the phase resulting from condensation of the soft waves.
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  • The Effects of Energy Losses in Aluminium on Electron Diffraction Intensities
    Shigeya Kuwabara, J. M. Cowley
    1973 Volume 34 Issue 6 Pages 1575-1582
    Published: June 05, 1973
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1575
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    By use of a “Gegenfeld” filter the ratios of intensities of electron diffraction rings from evaporated aluminium films (100∼550 Å in thicknesses) have been measured from various energy losses of the incident electrons. For elastic scattering and for 7 eV loss (surface plasmon loss) the intensity ratios show some effects of dynamical scattering. For 15 eV loss (volume plasmon loss) they are more nearly kinematical. For a narrow loss region at 3 eV and again at 10 eV the ratios show strong anomalies.
    These results are explained through intensity calculations band on n-beam dynamical diffraction theory. In particular, the anomalous intensity ratios are attributed to the effects of single-electron excitations in the crystals.
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  • Debye-Waller Factors of fcc Metals
    Jyoti Prakash, M. P. Hemkar
    1973 Volume 34 Issue 6 Pages 1583-1587
    Published: June 05, 1973
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1583
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    The temperature variations of the Debye-Waller exponents for face-centred cubic metals copper, silver, gold, aluminium, and nickel have been investigated by using a modified non-central force model given by Behari and Tripathi (1969). The force model takes into account Clark, Gazis and Wallis type angular forces and also the effect of electron-ion interaction given by Sharma and Joshi. The results of calculations have been compared with the experimental data in terms of the Debye-Waller factor temperature parameter Y=log10 e. (λ⁄sinθ)2 (2WTO−2WT), the effective X-ray characteristic temperature ΘM, and the mean square displacement of the atoms ‾u2. The agreement between the theoretical values and the experimental results has been found reasonably satisfactory.
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  • Experimental Determination of the Repulsive Potentials between Li+ Ions and Rate-Gas Atoms
    Hokotomo Inouye, Shigetomo Kita
    1973 Volume 34 Issue 6 Pages 1588-1592
    Published: June 05, 1973
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1588
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    Integral elastic scattering cross sections of Li+ ions scattered through effective laboratory angles greater than 5×10−3 rad in collision with Ne, Ar, and Kr atoms at room temperatures were measured in the ion energy range of 500–4000 eV. The repulsive potentials derived from the cross sections are represented by the following analytical formulas:
    Li+–Ne: V(r)=1620exp(−5.30r) 1.0<r<1.5,
    –Ar: V(r)=1750exp(−4.24r) 1.3<r<1.9,
    and
    –Kr: V(r)=2210exp(−4.08r) 1.4<r<2.0,
    where V(r) and r are in units of eV and Å, respectively.
    Repulsive potentials for the Ne–Ne, Ar–Ar, Kr–Kr, and Li+–Li+ systems were also deduced by applying the combining rule to the potentials for the Li+-rare-gas systems. The results are in reasonable agreement with those published by other workers in the potential range between 10 eV and several tenths of an eV.
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  • Cyclotron Instabilities in a Finite Pressure Plasma. II
    Tsuneo Amano, Yasuo Shimomura, Shin Yamamoto
    1973 Volume 34 Issue 6 Pages 1593-1599
    Published: June 05, 1973
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1593
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    Cyclotron instabilities in mirror confined plasmas are investigated, without use of the electrostatic approximation. A “j=1” anisotropy-loss-cone distribution is taken for the ion velocity distribution function and the electron is assumed cold. We found the analogous non-electrostatic instability which has been obtained in the part I of this paper. It is shown that this mode can be stabilized if cyclotron damping due to a small but finite k|| is taken into account.
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  • Effect of Field Errors on the Plasma Confinement in the dc Octopole
    Masaji Yoshikawa, John R. Gilleland, Tihiro Ohkawa, Teruo Tamano, Dale ...
    1973 Volume 34 Issue 6 Pages 1600-1610
    Published: June 05, 1973
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1600
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    The effect of field errors on the plasma confinement is studied in the dc octopole. These studies were conducted at very low densities, when the mean free path is greater than the characteristic machine dimensions. Both classical diffusion and electron-neutral scattering are negligible because of the low densities and high magnetic fields employed in the measurements. The axisymmetric error field of a few percent does not affect the confinement time. The axially asymmetric error field of a small fraction of a percent reduces the confinement time substantially. The dependence of the confinement time on the octopole and the error field, the ion mass, and the electron temperature is studied. The results indicate that the plasma loss in the dc octopole is due to the flow along the flux lines which spiral out of the confinement volume in presence of the error field.
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  • Coulomb-Collision Corrected Electron-Plasma Line Profiles
    Masanobu Niimura, P. W. Chan, R. J. Churchill
    1973 Volume 34 Issue 6 Pages 1611-1619
    Published: June 05, 1973
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1611
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    Complete profiles of Coulomb-collision corrected electron-plasma line including both electron-ion (e–i) and electron-electron (e–e) collisions have been computed. The line profiles are presented graphically for specific experimental conditions and are compared to those obtained from collision less plasma theory. It is seen that in the collision-dominated regime the electron-ion collisions play an important role while in the transition regime the electron-electron collisions control the damping of the plasma line. In both cases, collisions broaden the line-width significantly over the Landau (collisionless) width while the peak is compensatingly reduced such that the integrated line intensity remains constant. In addition, the resonance frequency is found to be shifted toward higher frequencies due to the effect of Coulomb collisions while the line-shape remains approximately Lorenzian. Possible experimental conditions wherein these Coulomb collisional effects may be observed by light scattering techniques are discussed.
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  • Modification of Weak Turbulence Theory Due to Perturbed Orbit Effects. I. General Formulation
    Kunioki Mima
    1973 Volume 34 Issue 6 Pages 1620-1632
    Published: June 05, 1973
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1620
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    A new formulation is presented to derive a wave-kinetic equation for the spectral function of the fluctuation potential in a weakly turbulent plasma. The theory takes into account both the orbit-modification effect due to strong wave-particle resonant interactions and the wave-scattering effect usually considered in the weak turbulence theory. The effect of a uniform external electric field is also taken into consideration. The method consists in a systematic use of a diagram technique in order to collect secular term contributions. The modified propagator generalized over the previous version by Dupree and Weinstock and the wave-kinetic equation consistent with the usual weak turbulence theory are obtained.
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  • Nonlinear Wave Modulation in a Plane-Bounded Plasma
    James. W. Van dam
    1973 Volume 34 Issue 6 Pages 1633-1640
    Published: June 05, 1973
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1633
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    The extension to two dimensions of the reductive perturbation method developed by Taniuti et al. is first discussed and then applied to the problem of electromagnetic waves propagating in a cold electronic plasma bounded by two conducting planes. The behaviour of the amplitude modulation is found to be governed by a nonlinear Schrödinger equation, from which the stability of the wave can be determined in some limiting cases.
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  • Equilibrium Vacuum Magnetic Field of an Axisymmetric Torus with an Elliptical Plasma Cross-Section
    Masatoshi Tanaka, Takasi Tuda, Masafumi Azumi
    1973 Volume 34 Issue 6 Pages 1641-1644
    Published: June 05, 1973
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1641
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    A method obtaining a vacuum magnetic field around a prescribed axisymmetric toroidal plasma equilibrium is described. The equilibrium vacuum field which fits the boundary conditions on the plasma-vacuum interface is obtained assuming a large aspect ratio. The equilibrium solution is given explicitly for an elliptical plasma cross section and the singularities of the resultant magnetic field are examined.
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  • Long Wavelength Helical Plasma Equilibrium with a Free Boundary
    Masatoshi Tanaka, Masafumi Azumi, Takasi Tuda
    1973 Volume 34 Issue 6 Pages 1645-1648
    Published: June 05, 1973
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1645
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    A method is presented to obtain a straight free boundary plasma equilibrium of helical symmetry. The exterior vacuum magnetic field around a prescribed plasma equilibrium with a long wavelength is determined using complex functions. The m-fold (m≥2) helical equilibrium slightly distorted from a circular cylinder is obtained together with the m=1 equilibrium of finite amplitude.
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  • Magnetohydrodynamical Steady Aligned Flow Past an Oblique Flat Plate at a High Reynolds Number
    Shigeaki Suwa
    1973 Volume 34 Issue 6 Pages 1649-1658
    Published: June 05, 1973
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1649
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    The flow of an electrically conducting viscous fluid past an insulated flat plate at a small incidence, θ, is dealt with by the linearized approximation. The behavior of the flow at large values of viscous Reynolds number, R, magnetic Reynolds number, Rm, and pressure number, S, is studied. Four characteristic types of flow are shown. In the first case: 1<<R≤O(1⁄sinθ) and κ1=(1+Rm⁄R)−[(1−Rm⁄R)2+4RmS⁄R]1⁄2>0, the flow field reduces to the conventional potential flow satisfying the Kutta-Joukowski condition. In the second case: 1<<R≤O(1⁄sinθ) and κ1<0, the flow field becomes the potential flow satisfying the MHD Kutta-Joukowski condition. In the third case: O(1⁄sin2θ)<<R and κ1>0, the flow field consists of a potential field and a wide wake spreading downstream, where the flow is rotational and the velocity almost vanishes. In the last case: O(1⁄sin2θ)<<R and κ1<0, the flow field consists of two wide wakes spreading both up- and downstream.
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  • Heat-Up of Rotating Stratified Fluid
    Takuya Matsuda, Takeo Sakurai
    1973 Volume 34 Issue 6 Pages 1659-1666
    Published: June 05, 1973
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1659
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    A heat-up process of a rotating stratified fluid in a circular cylinder which occurs as a response to a small change of the side wall temperature is analyzed in a framework of the linearized Boussinesq approximation.
    A meridional circulation induced by the buoyancy layer along the side wall causes both a heat-up and a spin-up process of the inner, non-conducting inviscid fluid. These processes continue until a quasi-steady asymptotic state is reached. The time scale of the transient process tends to the heat-up time of a non-rotating stratified fluid for the case of the strong stratification, and to the spin-up time of the homogeneous fluid for the case of the order unity stratification.
    The initial meridional circulation, and the asymptotic distribution of the azimuthal velocity and the temperature are also given.
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  • Electrodynamics of Moving Media and Symmetrical Field Tensor
    Haruo Moriguchi
    1973 Volume 34 Issue 6 Pages 1667-1675
    Published: June 05, 1973
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1667
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    Examining carefully the electrodynamics of moving media with velocity v along the thought suggested by Trousdell and Toupin, it seems to be more profitable to define the electromotive force as E+v×μ0H, as well as the magnetomotive force as H−v×v0E inside matter.
    The equations of field given by these definitions and the fundamental laws of electro-magnetic induction lead easily to a symmetrical momentumenergy tensor of field and a relativistically invariant separation of etherial and material tensor, and the fundamental relation of thermodynamics can be derived.
    The field outside of matter and Faraday’s low of electro-magnetic induction are not changed at all by those changes of definition. A few considerations on thermodynamical quantities are also added.
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  • Decay of 165m, gDy to Levels of 165Ho
    Hiroshi Yamamoto, Kiyoshi Kawade, Kanzo Yoshikawa, Toshio Katoh
    1973 Volume 34 Issue 6 Pages 1676-1684
    Published: June 05, 1973
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1676
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    Radio-active sources of 165Dy and 165mDy were produced by neutron irradiation and the decay was investigated. Forty gamma-rays were observed in the decay of 165Dy with a Ge(Li) detector and a Ge(Li)–NaI(Tl) coincidence apparatus. New gamma-rays were detected at the energy of 178 and 339 keV in the coincidence spectra. Seven gamma-rays were seen in the decay of 165mDy. A delayed and a prompt coincidence measurements with the 361.8 keV gamma-ray were performed to confirm cascade relations with this gamma-ray.
    Decay schemes of 165Dy and 165mDy were proposed on the basis of the present experimental results.
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  • Line Shape Function for Magnetic Circular Dichroism by the Method of Moments
    Nobuko Fuchikami, Masaharu Inoue
    1973 Volume 34 Issue 6 Pages 1685
    Published: June 05, 1973
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1685
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  • A Note on the Domain Wall Motion in Ferroelectric Switching
    Mitsuhiko Hayashi
    1973 Volume 34 Issue 6 Pages 1686
    Published: June 05, 1973
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1686
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  • Magnetization of Two-Dimensional Ferromagnet K2CuF4
    Hidenori Kubo, Katsuhiro Shimohigashi, Isao Yamada
    1973 Volume 34 Issue 6 Pages 1687
    Published: June 05, 1973
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1687
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  • Fine Structure in the Mössbauer Spectrum of TbFe1−xCrxO3
    Yoshikazu Nishihara, Akira Nakamura
    1973 Volume 34 Issue 6 Pages 1688
    Published: June 05, 1973
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1688
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  • Effect of Pressure on Néel Temperature of ZnCr2Se4
    Hironobu Fujii, Takahiko Kamigaichi, Tetsuhiko Okamoto
    1973 Volume 34 Issue 6 Pages 1689
    Published: June 05, 1973
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1689
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  • Nuclear Magnetic Resonance of V51 in Iron-Rich Fe–V Alloys
    Yoshito Fujiwara, Motoyuki Nomura, Hiroshi Fujiwara
    1973 Volume 34 Issue 6 Pages 1690
    Published: June 05, 1973
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1690
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  • Critical Behavior of an Amorphous Ferromagnet near the Curie Point
    Tadashi Mizoguchi, Noriaki Ueda, Kazushi Yamauchi, Hideki Miyajima
    1973 Volume 34 Issue 6 Pages 1691
    Published: June 05, 1973
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1691
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  • Hyperfine Structure of Fe3+ Ions in Rutile (TiO2)
    Kazuo Yajima, Eisuke Iguchi
    1973 Volume 34 Issue 6 Pages 1692
    Published: June 05, 1973
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1692
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  • The Triplet State of Z2 Centers
    Kazuko Kojima, Akihiko Tamura, Tadanobu Kojima
    1973 Volume 34 Issue 6 Pages 1693
    Published: June 05, 1973
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1693
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  • ESR of γ-Irradiated DGN
    Sigetoshi Ohashi, Ryuji Abe, Akihiro Kawamura
    1973 Volume 34 Issue 6 Pages 1694
    Published: June 05, 1973
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1694
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  • Anisotropy of Magnetoresistance of FeCr2S4 Single Crystals
    Tsuneo Watanabe
    1973 Volume 34 Issue 6 Pages 1695
    Published: June 05, 1973
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1695
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  • Resonant Brillouin Scattering by Acoustoelectrically Amplified Phonons in CdS
    Masayoshi Yamada, Koshi Ando, Chihiro Hamaguchi, Junkichi Nakai
    1973 Volume 34 Issue 6 Pages 1696
    Published: June 05, 1973
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1696
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  • Dislocation Loops in an InSb Crystal
    Koji Sumino, Hirofumi Shimizu, Ryugo Wagatsuma
    1973 Volume 34 Issue 6 Pages 1697
    Published: June 05, 1973
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1697
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  • Dielectric Study of the Pressure Effect on the Cubic-Tetragonal Phase Transition in KMnF3
    Kazuo Gesi, Kunio Ozawa
    1973 Volume 34 Issue 6 Pages 1698
    Published: June 05, 1973
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1698
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  • Diamagnetic Susceptibility and Its Anisotropy of Poly-γ-Ethyl-L-Glutamate
    Kohji Tohyama, Nahonori Miyata
    1973 Volume 34 Issue 6 Pages 1699
    Published: June 05, 1973
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.34.1699
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