All issues
Volume 42 (1977)
- Issue 6 Pages 1797-
- Issue 5 Pages 1439-
- Issue 4 Pages 1083-
- Issue 3 Pages 725-
- Issue 2 Pages 367-
- Issue 1 Pages 1-
Predecessor
- Proceedings of the Physico-Mathematical Society of Japan. 3rd Series
- Proceedings of the Tokyo Mathematico-Physical Society. 2nd Series
- Tokyo Sugaku-Butsurigakukwai Kiji-Gaiyo
- Tokyo Sugaku-Butsurigakkwai Hokoku
- Tokyo Sugaku-Butsurigaku Kwai Kiji
- Tokyo Sugaku-Butsurigaku Kwai Kiji
- Tokyo Sugaku Kaisya Zasshi
Volume 42, Issue 6
Displaying 1-42 of 42 articles from this issue
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Noboru Fujiwara1977 Volume 42 Issue 6 Pages 1797-1802
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSSimple empirical rules are in existence on the (σexp⁄σsm), the ratio of the experimental cross section for p-p and p-n quasifree scattering (QFS) to the one calculated with the spectator model. (1) The ratio for p-n QFS, (σexp⁄σsm)p1−n2, depends only on the relative energy En2−p3 between scattered neutron and spectator proton, namely (σexp⁄σsm)p1−n2=f(En2−p3). (2) The ratio for p-p QFS, (σexp⁄σsm)p1−p2 depends on the relative energies Ep1−n3 and Ep2−n3 and is expressed by a product form of the same function for p-n QFS, namely (σexp⁄σsm)p1−p2=f(Ep1−n3)×f(Ep2−n3). (3) Further, the function f(E) is expressed by the deuteron wave function in momentum space.View full abstractDownload PDF (724K) -
Osamu Horibe, Yoshihiko Mizumoto, Mitsuhiro Kawamura1977 Volume 42 Issue 6 Pages 1803-1809
Published: June 15, 1977
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe decay scheme of 91Sr was studied through the measurements of gamma-ray singles and coincidence spectra, gamma-gamma angular correlations and internal conversion coefficients. The energies and intensities of 49 gamma rays including 14 new ones were determined. A decay scheme of 91Sr involving two new levels in 91Y is proposed.View full abstractDownload PDF (888K) -
Ichiya Sadakata1977 Volume 42 Issue 6 Pages 1810-1815
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSAn approximate variational method of calculating the ground state energy of the Hubbard model is presented. The method is based on the trial wave function of Wigner. The result for the one-dimensional model is good compared with other approximate results. The extension of the method to finite temperatures is straightforward.View full abstractDownload PDF (640K) -
Akira Yanase1977 Volume 42 Issue 6 Pages 1816-1818
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe critical behaviour of the correlation function of the Ising model with a transverse field, Δ, is investigated by means of the perturbation expansions. Exact expressions for the coefficients up to seventh order in J⁄kT (J the exchange interaction) are given as functions of Δ⁄kT for the quadratic, triangular, simple cubic, body-centerd cubic and face-centerd cubic lattices. The universality of the critical index for the correlation length is concluded.View full abstractDownload PDF (332K) -
Sei-ichi Takase1977 Volume 42 Issue 6 Pages 1819-1823
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe square Ising ferromagnet is investigated by computer simulation in the region of competing interactions (nearest-neighbor interaction K>0 and second-neighbor one K′<0). Spontaneous magnetization M0 and energy E are calculated from advanced Monte Carlo calculations. The estimates of M0 and of the Curie point Tc(K′⁄K) determined by analyzing the data on E are compared with the results from analysis of low-temperature series based on the assumption β=1⁄8. The values of Tc(K′⁄K) are obtained from padé-approximant method for low-temperature series. The value of β does not vary from the Onsager’s value 1/8.View full abstractDownload PDF (588K) -
Akira Nakamura1977 Volume 42 Issue 6 Pages 1824-1835
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA modified type of nonlinear Schrödinger (NS) equation of the form
iαt(x,t)+Pαxx(x,t)+(1−r)[Qα(x,t)|α(x,t)|2+Rα(x,t)(|α(x,t)|2)xx]
−rα(x,t)ω∫0tdt′sinω(t′−t)[Q|α(x,t′)|2+R(|α(x,t′)|2)xx]=0
which describes the coherent propagation of Frenkel type excitons in one-dimensional lattice is derived and numerically solved with pure NS soliton initial conditions. Symbols α, ω and r represent respectively coherent amplitude of excitons, optical phonon frequency and the ratio of phonon-induced nonlinearity to total nonlinearity. In the limit R→0 and ω→∞, this equation becomes the pure NS equation. For R\gtrsimP solitons damp or become unstable which corresponds physically either large exciton-exciton interaction or large exciton-phonon interaction or sufficiently high temperature. Finite ω causes slowing down of soliton velocity. Pulsation of bound solitons tends to decrease. Bound solitons are more stable than one soliton.View full abstractDownload PDF (1248K) -
Kunihiko Morimoto1977 Volume 42 Issue 6 Pages 1836-1844
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA model of the spin-lattice relaxation time T1ρ in the rotating frame for tunneling ammonium ions is proposed. It is shown that T1ρ is influenced by the symmetry of the hindering potential about the ammonium ion and by the tunneling splittings which do not affect T1. We show a possibility that T1ρ is independent of the strength of rf field H1 in the case of ammonium ion as in methyl-group. The relation between the present model and classical theory is also discussed.View full abstractDownload PDF (1032K) -
Tomitaro Nagashima, Hidetoshi Fukuyama1977 Volume 42 Issue 6 Pages 1845-1851
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe investigation is carried out of the upper critical field Hc2 of a superconducting alloy in the case where an appreciable variation of the transition temperature Tc is observed on alloying. It is assumed that the density of states is not a smooth function of energy at and near the Fermi level and that the BCS coupling parameter is anisotropic. It turns out that the shift of Fermi level on alloying does not modify the expression for Hc2 usually employed if one interprets Tc and Fermi velocity in the expression as those of the alloy. It is also discussed that a recent investigation by Teichler on the effect of anisotropic coupling ignores an important term.
For the case of Nb–Ta system, it becomes clear that the shift of Fermi level is small enough so that Fermi velocity remains constant even though there exists a large variation in Tc with alloying. Qualitative discussions are given on the effect of anisotropic coupling, and it turns out that more detailed experimental investigations are needed to clarify the importance of this effect.View full abstractDownload PDF (816K) -
Yoshihide Kimishima, Satoru Simizu, Shoichi Nagata, Takashi Watanabe1977 Volume 42 Issue 6 Pages 1852-1857
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe magnetic susceptibility was measured for NixCd(1−x)(NH3)2·Ni(CN)4·2C6H6 series from x=1.0 to x=0.36. The Weiss temperature for each x was determined in the temperature region between 14 K and 20 K. It varies linearly with x within the experimental error. The Néel temperature TN(x) was defined from the inflection point of χT curve. Thus obtained TN(x) agrees very well with that determined from specific heat measurement above xc=0.65. The xc is the critical concentration at which the phase transition point disappears at finite temperature region. [Tmaxχ(susceptibility maximum)−TN] increases with decreasing of x and has the extreme at xc in xc≤x≤1. This result shows that the short range order in T≥TN(x) develops by the effect of the magnetic dilution in xc≤x≤1.View full abstractDownload PDF (628K) -
Takefumi Tsuboi1977 Volume 42 Issue 6 Pages 1858-1864
Published: June 15, 1977
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe zero-bias resistance has been measured on ensembles of tunneling-coupled fine particles of Sn with the average diameter ranging 1250–2700 Å over the temperature region of 1.5–4.2 K. In these ensembles, the interparticle coupling can be varied independently of the particle size. As the interparticle coupling becomes weak, the resistive transition temperature, T0, becomes sizably lower than Tc of the particles. The behavior of the resistance above T0 is explained by the fluctuations of the Josephson current by use of a correction parameter for the electrical capacitance between particles. The shift of T0 is inversely proportional to the coupling energy between particles. As the particle size decreases, the charging energy of a particle seems to bring about lowering of T0.View full abstractDownload PDF (960K) -
Hideji Suzuki1977 Volume 42 Issue 6 Pages 1865-1872
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe plastic flow in hcp 4He was investigated by using a new equipment which was designed to improve the accuracy of measurements. The pronounced yield drop is always observed at moderately low temperatures or in high speed tests, but the yield drop becomes almost undetectable in low speed tests at high temperatures, where the steady flow stress is proportional to one fourth power of the flow rate. At low temperatures and at high pressures flattened upper yield points are observed frequently, and the steady flow stress becomes independent of the flow rate in low speed tests.View full abstractDownload PDF (816K) -
Nobuaki Shohata1977 Volume 42 Issue 6 Pages 1873-1880
Published: June 15, 1977
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSMagnetic measurements on the single crystal RGa intermetallic compounds (R=Pr, Nd, Sm, Tb, Dy, Ho and Er) have been carried out in the 4.2 K to 350 K temperature range. All the compounds, except ErGa, are ferromagnetism with high coercive force along the easy direction. ErGa compound is antiferromagnetism. The magnetization curves for the heavy rare earth compounds were fairly well explained on the basis of the molecular field model, including the crystal field. But, for light rare earth compounds, the agreements between the experimental and the calculated values were not so good. Crystal field parameters B20 and B22 were determined from the anisotropy of paramagnetic Curie temperatures on the basis of the molecular field theory. These parameters were compared with those of the point charge model.View full abstractDownload PDF (1004K) -
Soji Ohara, Sigehiro Komura, Takayoshi Takeda, Tadamiki Hihara, Yukito ...1977 Volume 42 Issue 6 Pages 1881-1887
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSIn order to determine the magnetic moment of each constituent atom in bcc ternary iron alloys Fe(CoMn) and Fe(CoCr), measurements of the bulk magnetization, Mössbauer spectra of 57Fe nuclei and NMR spin echo spectra of 59Co nuclei have been made for each sample in entire bcc concentration ranges. It is concluded that the Co moment in both alloy systems remains nearly constant being 1.8 μB and that Fe moment in Fe(CoMn) alloys is determined uniquely as a function of the number of 3d-electrons, while Fe moment in Fe(CoCr) alloys is not. It is inferred that Mn atom in Fe(CoMn) alloys has parallel magnetic moment to the bulk magnetization and Cr atom in Fe(CoCr) antiparallel magnetic moment.View full abstractDownload PDF (704K) -
Chikatoshi Satoko, Shuko Washimiya1977 Volume 42 Issue 6 Pages 1888-1899
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSSpectral change of the exciton absorption lines in YCrO3 observed during the field-induced spin reorientation (SR) is investigated. The energy shift of the center of gravity of the four exciton lines during the SR is calculated. It is shown that the change of the spin-orbit coupling energy during the SR plays an important role in the energy shift. The change of the observed total intensities of the exciton lines in each polarization in the whole range of the SR is calculated by taking into account the tilting of the CrO6 octahedron from the undistorted perovskite structure. The result is in fair agreement with experiments. Finally the energy transfer matrix elements are determined from the moments of the observed energies and intensities by choosing appropriately the phases of the basic wavefunctions.View full abstractDownload PDF (1364K) -
Masato Nishi, Hideo Hara, Yoshifumi Ueda, Yukio Kazumata1977 Volume 42 Issue 6 Pages 1900-1905
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe ESR spectra of Pb3+ ions in cubic PbF2 crystals produced by irradiation with γ-rays and neutrons at low temperatures have been studied. Besides a large hyperfine structure from 207Pb nucleus a complex superhyperfine structure due to the interactions with surrounding F and Pb nuclei is observed. From Breit-Rabi diagram the hyperfine splitting constant A(207Pb) can be determined; its reduction with regard to the free ion value is discussed. From the measured angular dependence of the superhyperfine structure the principal values A(F)⁄⁄, A(F)⊥ and a(207Pb) of the SHF-tensors are obtained. This induced ESR can be bleached thermally at around 175 K.View full abstractDownload PDF (624K) -
Jiro Yamashita, Yasunori Kubo, Shinya Wakoh1977 Volume 42 Issue 6 Pages 1906-1913
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSAPW band calculation is used to calculate both the real and imaginary parts of the dielectric function and the energy-loss function for two transition metals Mo and Nb. The Xα-self-consistent potential is slightly modified to be different for dγ- and dε-states. As a result, observed shapes and sizes of the Fermi surfaces are well reproduced by the band calculation. Calculations of the dielectric functions and the energy-loss functions show good agreement with the experimental data.View full abstractDownload PDF (892K) -
Koji Maeda, Koshiro Sakamoto1977 Volume 42 Issue 6 Pages 1914-1917
Published: June 15, 1977
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe stress relaxation rate in four-point bending of CdS single crystals has been found to be suppressed by irradiation of 25 keV electron beam. In contrast with the ordinary irradiation hardening, the present irradiation hardening effect, which is named “cathodoplastic effect”, is reversible in the sense that the hardening occurs only while specimens are being irradiated with the electron beam. An in situ observation of dislocation motion was carried out by using the scanning electron microscope the electron-beam probe of which was used also for the electron irradiation on specimens. The comparison of the observation of dislocation motion with the stress relaxation curve shows that the cathodoplastic effect in CdS is attributed to a deceleration of dislocations by the electron-beam irradiation.View full abstractDownload PDF (496K) -
Akikatsu Sawada, Yasuharu Makita, Yutaka Takagi1977 Volume 42 Issue 6 Pages 1918-1923
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSIt has been found that the (011) and (031) twin planes observed in tris-sarcosine calcium chloride (TSCC) can be moved by an appropriate external stress just like those found recently in (NH4)2SO4. The ferroelastic properties of TSCC in the orthorhombic phase can be explained if the existence of a hypothetical hexagonal phase is assumed just as in the case of (NH4)2SO4. The space group of the hypothetical phase is inferred to be D6h3–P63/mcm, in which sarcosine molecules are in disordered state, occupying either one of two stable states with equal probability.View full abstractDownload PDF (712K) -
Terutaka Gotô, Kan-Ichi Kamiyoshi1977 Volume 42 Issue 6 Pages 1924-1930
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe phase diagram and the characteristics of β-δ, β-γ, γ-δ phase transitions of NH4Cl1−xBrx mixed crystal system were determined by the dielectric measurement. It was found that the triple point at x=0.06 and the tricritical point at x=0.26 existed, and that an increase of both the transition temperature and the thermal hysteresis were observed near the triple point. At the tricritical point the order of β-γ transition changed from the first to the second with the increase of x. An attempt was made to explain qualitatively the anomalous critical phenomena near the triple point and the appearance of the tricritical point by a phenomenological treatment assuming the existence of the resonance coupling through the elastic strain between two disordering modes of pseudospin, one at Brillouin zone center and the other at zone boundary.View full abstractDownload PDF (892K) -
Masaki Maeda, Takuro Ikeda1977 Volume 42 Issue 6 Pages 1931-1936
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSElastic measurements have been made on LiNH4C4H4O6·H2O (LAT) crystal by the piezoelectric resonance method. The temperature dependence of all elastic compliance coefficients was determined. Large anomalies were found in s55E and s55D and a small anomaly in s44E near the Curie temperature. A phenomenological theory was proposed to explain anomalous dielectric and elastic behaviors, introducing an order parameter of B2 symmetry.View full abstractDownload PDF (644K) -
Yoshishige Uchida1977 Volume 42 Issue 6 Pages 1937-1941
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSMeasurements of electron spin resonance are carried out on X- and γ-ray irradiated single crystals of phosphorus-doped quartz. A pair of absorption lines showing hyperfine interaction with a nuclear spin of phosphoric ion is observed at room temperature. This ESR signal is ascribed to a paramagnetic center of C2 symmetry having g and A tensor components of g1=2.0011, g2=2.0025, g3=2.0003 and |A1|=1065, |A2|=1049, |A3|=989 in units of 10−4 cm−1, respectively. The center is considered to be an s-like electron localized at a substitutional pentavalent phosphoric ion surrounded by four oxygen ions.View full abstractDownload PDF (580K) -
Hiroshi Ohkura, Koichi Imanaka, Osamu Kamada, Yuzo Mori, Takeshi Iida1977 Volume 42 Issue 6 Pages 1942-1948
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe Stark effects in F center emission have been investigated for KBr, KI, RbBr, and RbI crystals as a function of emission wave-length and polarization, electric field amplitude, and sample temperature, with using a PbS IR detector. Observed results are qualitatively similar to those measured by Bogan and Fitchen for several other alkali halides. The Stark polarization and the first moment change (a red shift) of the emission band are quadratic in electric field strength; their coefficients are tabulated. Two different theoretical forms of the temperature dependence of the Stark polarization P(T), which have been derived by Bogan and Fitchen, and Ham and Grevsmühl, respectively, are found to be invalid to explain the experimental data consistently. A phenomenological form to describe P(T) is proposed by introducing a new parameter.View full abstractDownload PDF (816K) -
Tsuyoshi Yamaguchi, Satoru Sugano1977 Volume 42 Issue 6 Pages 1949-1956
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe method of calculating the final state of the K-emission and the X-ray p-photoelectron emission in transition-metal compounds are shown. The p-d Coulomb and exchange interactions are expressed in terms of matrix elements for the two-electron system of the p- and d-electrons by using the coefficients of fractional parentage, CFP. An approximation which makes manageable the 3p-hole problem of the transition-metal compounds presented and its validity is discussed. By comparing the 3p-photoelectron emission spectrum of trivalent chromium compounds calculated by the use of this approximation with the experiment, the cubic field strength is determined to be a little larger than 3 eV and the reduction factors for the p-d Coulomb and exchange interactions to be unity, showing the hole-induced covalency to be small for the t2g orbital.View full abstractDownload PDF (992K) -
Masakazu Ichikawa, Kazunobu Hayakawa1977 Volume 42 Issue 6 Pages 1957-1964
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA method of generalized Bethe potential taking exact account of all higher order terms of the Bethe potential, is proposed for intensity calculations of reflection electron diffraction. Test calculations concerning this method are given. Comparisons of intensity curves using this method with those accurately calculated show that this method is applicable for economizing the number of diffracted beams used in intensity calculations.View full abstractDownload PDF (948K) -
Tetsuji Arai, Makoto Hirabayashi1977 Volume 42 Issue 6 Pages 1965-1972
Published: June 15, 1977
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe short range configuration of oxygen atoms in a TiO0.42 crystal has been studied by analyses of X-ray and neutron diffuse scattering. The diffuse scattering is distributed on the planes normal to the c* axis around most of the reciprocal lattice points of H−K=3n, L=odd and H−K=3n±1, L≠0. The diffuse scattering around each point has a hexagonal symmetry in the L=odd planes just above the interstitial order-disorder transition temperature 575°C. The intensity maximum becomes circular and shifts gradually apart from the reciprocal lattice point with increasing temperature. The intensity distributions are interpreted in terms of the correlative configuration of out-of-steps of the oxygen distribution accompanying the static distortion of titanium lattice.View full abstractDownload PDF (1072K) -
Shigeya Kuwabara, J. M. Cowley1977 Volume 42 Issue 6 Pages 1973-1979
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSElectron microscopic images of bend contours given by single crystal aluminium films have been calculated, by use of the multi-slice approximation to n-beam dynamical theory, for elastically scattered electrons and for electrons inelastically scattered by several different processes. The effects of the size and position of the objective aperture are taken into account. Comparison with experimental observations shows good agreement.View full abstractDownload PDF (840K) -
Kojiro Takagi, Naoto Kitamura, Michio Takami1977 Volume 42 Issue 6 Pages 1980-1982
Published: June 15, 1977
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe rotational transitions 93,6–93,7 and 144,10–144,11 in the v1=1 state of HDCO have been observed by infrared-radiofrequency double resonance by using a Zeeman-tuned 3.5 μm He–Xe laser. The observed transition frequencies are 1956.00±0.05 MHz and 1045.85±0.05 MHz, respectively. The analysis of these frequencies and that of the 31,2–31,3 line observed by Takami and Shimoda shows that the rotational levels in the v1=1 state cannot be fitted to the usual asymmetric rotor pattern. The double resonance effect has also been observed by saturating the rotational transitions in the ground vibrational state. The assignments of the three vibration-rotation lines of HDCO given by Sakurai et al. have been confirmed.View full abstractDownload PDF (392K) -
Tadakazu Maeda, Satoru Fujime1977 Volume 42 Issue 6 Pages 1983-1991
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSPhoton counting autocorrelation functions of light scattered from solutions of muscle F-actin were measured by use of a 128 channel digital correlator. Measured correlation functions showed highly non exponential decay, which came mainly from the existence of very slow decay components, much slower than 1 s−1. These slow decay components were observed not to produce the occupation number fluctuation. The average decay rate, \barΓ, dispersion, μ2⁄\barΓ2, and skewness, μ3⁄\barΓ3, obtained by the cumulant expansion method were strongly dependent on the channel width of the correlator, and on the position in, and preparation of the solution.
These results were discussed in relation to the existence of aggregates and exponential length distribution of actin filaments. It was shown that, in highly polydisperse samples, correlation functions should be measured at various channel widths, and that apparent non reproducibility of the results could be avoided by plotting the parameters against the mean counting rate.View full abstractDownload PDF (1072K) -
Takao Minato, Akira Hatano1977 Volume 42 Issue 6 Pages 1992-1996
Published: June 15, 1977
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe characteristic function of the distribution function of the square radius of gyration S2 of an unperturbed ring chain represented by the Feynman path integral is exactly evaluated. The Fourier transform of the characteristic function is performed analytically and numerically in one-, two-, and three-dimensional spaces. Rigorous expressions of the distribution function valid for small and large S2 are given by the contour integrations.View full abstractDownload PDF (432K) -
Shin Akahoshi, Kenji Miyakawa1977 Volume 42 Issue 6 Pages 1997-2005
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe electrohydrodynamic convection is studied theoretically in an infinite nematic medium of the planar alignment under a sinusoidal electric field. A non-linear time-dependent equation for the director distortion is derived with a one-dimensional treatment. Solving this equation numerically under a periodic boundary condition, the followings are described: i) the growth of the director distortion due to sudden application of the electric field above threshold and ii) the distortion distribution and the flow velocity distribution in the steady convective state. It is found that the present approach is useful to understand the behaviours of the system under the electric field above threshold.View full abstractDownload PDF (844K) -
Toshio Tange, Kimitaka Itoh, Sanae Inoue, Kyoji Nishikawa1977 Volume 42 Issue 6 Pages 2006-2013
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA general theory is presented for the diffusion of a multi-ion species plasma across magnetic field due to electrostatic fluctuations. It is shown that the diffusion flux due to wave-particle interactions is not necessarily proportional to the density gradient of the particle species of interest. The result is applied to the impurity diffusion due to those drift waves which exist in a single ion-species plasma. The dominant nonlinear effect is the induced scattering of waves on ions and the resulting diffusion constant of the host ions is given by the Kadomtsev formula, D∼γ2⁄k2ω, where γ, ω and k are respectively the growth rate, frequency and wavenumber of the drift wave. The impurity diffusion constant is positive (or negative) if the impurity Larmour radius is smaller (or greater) than the host-ion Larmour radius, and becomes greater than the host diffusion constant if the spectrum is localized to the unstable region.View full abstractDownload PDF (1032K) -
Shigeki Morioka, Goichi Matsui1977 Volume 42 Issue 6 Pages 2014-2022
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe effect of the dispersion due to the radial motion of bubbles on the choking of a bubbly liquid flow in a convergent-divergent nozzle is considered both numerically and analytically by using perturbation solutions. For the subsonic upstream flow, the oscillator flow appears downstream behind the throat as the flow rate approaches the critical value. Beyond the critical value, it changes critically to different type of flow, in which the pressure decreases monotonically to the negative value. The transition between two types of flows is inferred from the integral curves in the phase plane. A similar procedure is applied to the case of the supersonic upstream flow.View full abstractDownload PDF (1100K) -
Yoshimoto Onishi1977 Volume 42 Issue 6 Pages 2023-2032
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSEvaporation and condensation of a slightly rarefied vapor gas between concentric cylinders and spheres are investigated on the basis of the linearized BKW (or BGK) equation and the diffuse reflection boundary condition.
The reverse temperature gradient, negative heat and mass flows exist as in the parallel two-surface problem. The effects of the surface curvature, the normal stress other than pressure and the rarefaction on the above phenomenon as well as on the field distributions are also investigated.View full abstractDownload PDF (964K) -
Akira Yoshizawa1977 Volume 42 Issue 6 Pages 2033-2040
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSKolmogoroff’s spectrum in homogeneous turbulence is studied by means of a renormalization-group approach. The present analysis is based on Hopf’s equation for the characteristic functional. It consists of two steps: renormalization of small eddies into big ones and rescaling of physical quantities. As the result, Kolmogoroff’s spectrum is shown to be a scaling law in the inertial subrange.View full abstractDownload PDF (560K) -
Yaso’o Matunobu1977 Volume 42 Issue 6 Pages 2041-2049
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA linearized Navier-Stokes equation governing the two-dimensional viscous incompressible flow impinging on an infinite flat plate is suggested to investigate the time-dependent flow structure and the wall shear stress near the stagnation point. It can be shown that this equation yields a simple analytical solution for the steady Hiemenz flow, which is very close to the exact solution first derived numerically by Hiemenz. Therefore, it is expected that for unsteady Hiemenz flows this equation describes the flow structure as well. Perturbed solutions for a pulsatile Hiemenz flow directed normally and obliquely to the plane wall are calculated in analytical forms when the amplitude of pulsation is small, and show some essential features of the pulsatile flow near the stagnation point.View full abstractDownload PDF (820K) -
Jun-ichi Sakai, Tutomu Kawata1977 Volume 42 Issue 6 Pages 2050-2055
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe stability of the high frequency mode wave propagating in a two-mode nonlinear transmission line is analysed, and the condition is found under which it decays into a pair of low frequency and high frequency waves through parametric interaction. Two limiting cases (resonant decay instability and modified decay instability) are considered, and for each case the wave number region and the maximum growth rate of the unstable modes are determined.View full abstractDownload PDF (672K) -
Masahiko Hirao, Nobumasa Sugimoto1977 Volume 42 Issue 6 Pages 2056-2064
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSNonlinear Schrödinger equation, which describes the nonlinear modulation of dispersive torsional waves in an elastic rod of circular cross-section, is derived by the derivative expansion method. It is found, for the lowest dispersive mode, that the modulational instability occurs except in the range of the carrier wavenumber, 2.799<k<3.032. However, at the critical wavenumber where the fundamental and its second-harmonic waves can propagate simultaneously, the second-harmonic resonance takes place and then the nonlinear Schrödinger equation is no longer valid. In this case, another system of equations is derived, which governs both the wave amplitudes involved in this resonance between the fundamental torsional and its second-harmonic longitudinal modes.View full abstractDownload PDF (1000K) -
Kay Kohn1977 Volume 42 Issue 6 Pages 2065-2066
Published: June 15, 1977
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSCu2SeO4 shows spontaneous magnetization below 58.8 K. Its origin is considered to be a collinear ferrimagnetic arrangement of Cu2+ moments on two different sites.View full abstractDownload PDF (168K) -
Yoshitoshi Muraoka, Masayuki Shiga, Yoji Nakamura1977 Volume 42 Issue 6 Pages 2067-2068
Published: June 15, 1977
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSLow temperature specific heat measurements were made for the pseudobinary Laves phase intermetallic compounds Y(Fe1−xCox)2. The concentration dependence of the electronic specific heat coefficient γ, which shows a similar behavior to that of the bcc Fe–Co alloys, is discussed in connection with the magnetic properties of the pseudobinary system. The observed extraordinary high γ value for x=0.9, which is near the critical concentration for the onset of ferromagnetism, is probably due to the spin fluctuations.View full abstractDownload PDF (272K) -
Hiroshi Hatanaka, Toshiro Ozawa, Tsuneo Hashi1977 Volume 42 Issue 6 Pages 2069-2070
Published: June 15, 1977
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSTwo-quantum rotary echoes predicted by Bloch like equations for two-quantum transition have been observed in a multi-level NMR system of 27Al nuclei in Al2O3. An rf field exactly at resonance to the two-quantum transition (Δm=2) was turned on at t=0 and its phase was shifted by 90° at t=τ. The echo at t=2τ was observed by using the technique of transfer of coherence reported previously. Characteristic dependence of the echo width upon inhomogeneity of rf field amplitude was confirmed experimentally.View full abstractDownload PDF (224K) -
Kazuo Kimoto, Isao Nishida1977 Volume 42 Issue 6 Pages 2071-2072
Published: June 15, 1977
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSLithium clusters containing up to 15 atoms were prepared by evaporation in an inert gas at a pressure of 10−4∼10−3 Torr and the mass numbers of these clusters were measured by a mass analyzer. The following are the main results. i) In good vacuum lithium was detected as single atoms. ii) When an inert gas was present, Li2, Li4, Li6 and Li8 were always detected; however, Li3 and Li5 were never detected. Li7 and Li9 were detected in smaller amounts than those of neighbouring clusters. iii) In the range Li10 to Li15 all possible clusters were detected and Li13 was most abundant among them.View full abstractDownload PDF (248K) -
A. Vidyanidhi, A. Sithapathi1977 Volume 42 Issue 6 Pages 2073-2074
Published: June 15, 1977
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSA theoretical analysis is made of the flow of an incompressible viscous liquid through a rotating straight pipe of circular cross section flowing under the influence of a pressure gradient oscillating sinusoidally in time. The governing equations are linearised by an expansion valid for small values of the Taylors number. A solution involving numerical evaluation of finite Hankel transforms is presented for arbitrary values of the parameter α=a(ω⁄ν)1⁄2. The secondary flow is examined in detail for various values of α.View full abstractDownload PDF (240K)
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