All issues
Volume 30 (1971)
- Issue 6 Pages 1519-
- Issue 5 Pages 1217-
- Issue 4 Pages 901-
- Issue 3 Pages 595-
- Issue 2 Pages 311-
- 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 30, Issue 2
Displaying 1-50 of 54 articles from this issue
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Tadanori Minamisono, Kozi Matuda, Akira Mizobuchi, Kenzo Sugimoto1971 Volume 30 Issue 2 Pages 311-322
Published: February 15, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSQuadrupole effects in NMR on 12B(T1⁄2=20 ms) and 12N(T1⁄2=11 ms) have been investigated by using the polarized nuclei produced and implanted through nuclear reactions and the resultant asymmetric β decay. The implantation media were polycrystalline bcc metals (Nb, Mo, Ta and W), TiB2 and ZrB2. To increase the observable effects in NMR, a frequency-modulated r.f. field was employed. The spectra in bcc metals show the characteristics of quadrupole interaction for nuclear spin I=1h, and the determined coupling constants depend largely on the periodic groups of the related elements. The spectra in the bcc metals together with those in the fcc metals (Al, Cu, Pt and Au) indicate that the major implanted sites are interstitial. From the results on TiB2 and ZrB2 and the known values on 11B, the ratio of quadrupole moments is determined as |Q(12B)⁄Q(11B)|=0.42±0.04, and the moment of 12B is deduced to be |Q(12B)|=0.0171±0.0016 b.View full abstractDownload PDF (1440K) -
Shunya Ishioka1971 Volume 30 Issue 2 Pages 323-327
Published: February 15, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSUniform motion of a screw dislocation is studied in a simple cubic lattice in which atoms interact piecewise harmonically with nearest neighbours. The stress σ required for keeping the motion with velocity v is given exactly. The dislocation excites lattice waves with k given by ω(k)=v·k, where ω(k) is the dispersion relation of waves and k is not restricted within the first Brillouin zone. In contrast to continuum approximation, there is no singularity at v=c; c is the sound velocity. At low velocities (v\lesssimc⁄3), σ(v) has many singular points reflecting the van Hove singularities.View full abstractDownload PDF (520K) -
Kensuke Tani, Makoto Takemura1971 Volume 30 Issue 2 Pages 328-337
Published: February 15, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSDynamical behaviour of both optical and acoustic modes near the transition point of displacive-type ferroelectrics such as BaTiO3 and SrTiO3 is investigated theoretically with the use of the correlation function method. Particular attention is paid to the behaviour concerning the memory effect due to the critical fluctuation of polarizations and the possibility of existence of a new-type oscillation peculiar to the critical regime is shown adopting the Silverman Hamiltonian. The dynamic scaling law in the original form is shown not to be applicable to these substances and its physical origin is clarified. An extended form of this law is given.View full abstractDownload PDF (1304K) -
Motoomi Yamanoi, Yutaka Kano1971 Volume 30 Issue 2 Pages 338-346
Published: February 15, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSIt is investigated how a two-level system under the influence of strong monochromatic radiation responses to weak monochromatic radiation in a transient state. The general solution of the equation of motion for the density matrix is obtained within the linear approximation with respect to the ratio of the amplitude of the weak radiation to that of the strong radiation. It is shown that for the frequency difference of the two radiations smaller than the inverse of transverse relaxation time (|ω−ω′|T2<1), the amplitude of the nutation in transient susceptibility to the weaker radiation becomes very large compared with the amplitude in the opposite situation; |ω−ω′|T2\gtrsim1. The first peak of this amplitude is proportional to 1⁄(ω′−ω), where ω′ and ω are the frequencies of the weak and strong radiation respectively. Therefore, the transient amplitude of the susceptibility becomes very large as ω′→ω as far as the linear approximation is valid. This giant susceptibility is originated in a transient Raman Process.View full abstractDownload PDF (900K) -
Shigetoshi Katsura, Yoshihiko Abe, Masami Yamamoto1971 Volume 30 Issue 2 Pages 347-357
Published: February 15, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSTo study the relations between Yang-Lee’s theory of the phase transitions and the distribution of the zeros of the partition functions in the antiferromagnetic case, the partition functions of finite (4×4 and 4×6) Ising model with the nearest and the next nearest neighbor interactions are calculated. The distributions of the zeros in the fugacity z plane of the partition function for various combinations of the values of J⁄kT−J′⁄kT or tanh (J⁄2kT)−tanh (J′⁄2kT) are investigated. The patterns of the distribution of the zeros show several types corresponding to ferromagnetic state, antiferromagnetic state and superantiferromagnetic state. In the antiferromagnetic ordered state the locus of the zeros is found to be nearly two concentric circles and to cross the positive real axis at two points zc and 1⁄zc when the next neighbor ferromagnetic interaction is introduced. This means that our system shows the phase transitions at finite critical fields Hc and −Hc. The locus of zeros of Fisher’s model of super-exchange antiferromagnet is also shown to cross the positive real axis at zc and 1⁄zc below the Néel temperature.View full abstractDownload PDF (1104K) -
Ikuo Ono, Syogo Mikado, Takehiko Oguchi1971 Volume 30 Issue 2 Pages 358-366
Published: February 15, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe bound state problems associated with two magnons in a linear chain of spin 1/2 with nearest and next nearest neighbor exchange integrals, J and αJ, respectively, are studied. The Hamiltonian is rewritten in terms of the Fermi operators in place of spin operators, and an integral equation to determine the bound state energies is obtained. In the cases when the total wave number K of two magnons is π or π⁄2, analytical solutions are easily obtained. A part of the present results disagrees with Majumdar’s ones. Computer studies on the bound states are performed for a finite chain composed of spins up to twenty. They are consistent with the analytical results.View full abstractDownload PDF (1084K) -
Hiroyoshi Suzuki, Takashi Watanabe1971 Volume 30 Issue 2 Pages 367-374
Published: February 15, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSMagnetic properties of Cu(NH4)2Br42H2O have investigated. Particular attention is drawn to the role of anisotropy at the phase transition. The critical exponents of the susceptibility along the easy axis and the spontaneous magnetization have been obtained as γ=1.30±0.03 and β=0.34±0.02 respectively.
The susceptibility perpendicular to the easy axis does not diverge at the Curie temperature. The second order phase boundary in a perpendicular field has been obtained as {Tc(0)−T(H⊥c)}⁄Tc(0)=(H⊥c⁄H⊥0)ω with ω=2.63±0.1 and H⊥0=(270±10)Oe, where H⊥c is the critical field at temperature T.
The observed properties are well explained, except for the values of the exponents, by a molecular field model with anisotropic exchange interaction. The uniaxial character of the salt has been established.
There is some evidence that the Curie temperature of powder specimen may differ from that of single crystals.View full abstractDownload PDF (924K) -
Takao Maeda1971 Volume 30 Issue 2 Pages 375-380
Published: February 15, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSIn order to investigate the anomalous elastic properties relating to the large volume magnetostriction, Young’s and shear moduli of Gd and Invar were measured as a function of temperature and magnetic field. Their bulk moduli were calculated from the measured values. In spite of the fact that the thermoelastic coefficients of the measured moduli were negative for Gd and positive for Invar, the coefficient of the bulk modulus was negative for each of the two, and an analogous strong magnetic effect on the calculated moduli was observed even for magnetically saturated states. The data for Gd are discussed on the basis of the RKKY interaction.View full abstractDownload PDF (688K) -
Shigeyuki Hayashi, Seiki Takahashi, Mikio Yamamoto1971 Volume 30 Issue 2 Pages 381-387
Published: February 15, 1971
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSIt has been observed that the flow stress of a nickel single crystal can be lowered about 15% by applying an alternating magnetic field parallel to the specimen axis during plastic deformation at −194°C. This phenomenon, named by us as the magneto-plastic effect, can be interpreted qualitatively in terms of a concept that oscillating magnetic domain walls give a force on dislocations.
In order to clarify this effect, its dependence on the temperature, plastic strain, strain rate, and on the strength and frequency of the alternating magnetic field applied have been measured. The activation volumes in relation to a thermally activated process of dislocation motion were also obtained from the stress relaxation curves measured after and before the application an alternating magnetic field, and they were compared mutually at various values of the shear stress.View full abstractDownload PDF (788K) -
K. B. Das, H. I. Dawson1971 Volume 30 Issue 2 Pages 388-398
Published: February 15, 1971
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSA characteristic substructure has been observed in the isochronal electrical resistivity recovery between −20 and +170°C of quenched 99.99 and 99.9999% pure gold measured at 4.2K. Most of the quenched-in resistivity recovers between 35 and 125°C were three distinct processes (1), (2), and (3) are observed. This recovery shifts to lower temperatures with increasing quenching temperature and dislocation density; it also occurs at lower temperatures in the 99.99% gold compared to that of the purer material. Processes (1) and (2) have activation energies of 0.69±0.03 eV and 0.78±0.05 eV respectively, while the migration energy for process (3) is expected to be about 0.81 eV. The identification of the defects is discussed in view of the binding energy of divacancies.View full abstractDownload PDF (1392K) -
Hirohito Fukutani1971 Volume 30 Issue 2 Pages 399-403
Published: February 15, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSOptical constants of silver-gold alloys of several compositions were determined by reflection measurements in spectral region 2eV∼20eV to investigate the shift of the structures in ε2 spectra with increase of composition of gold. In the lower energy region 2eV∼10eV, six characteristic structures were found and they shifted smoothly with composition, converging to the structures of pure gold at 2.0, 3.5, 4.1, 5.0, 6.0, 6.5eV respectively. They were assigned as the interband transitions corresponding to L3−L2′, X5−X4′, L2′−L1, X1−X4′, W1′−W3, W1′−W2′ in Segall’s energy diagram.View full abstractDownload PDF (572K) -
Kazuhide Tanaka1971 Volume 30 Issue 2 Pages 404-411
Published: February 15, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSIn order to investigate effects of ordering on the Snoek peak of carbon in Fe–Al alloys, internal friction measurements have been carried out on alloys containing 0 to 30.0 at.% Al and about 0.01 wt.% C. A relaxation peak was found to occur at 130°C at the frequency of about 1 cps in the region between 19.3 and 24.5 at.% Al after appropriate heat-treatments, and it was attributed to stress-induced diffusion of carbon in ordered Fe3Al lattice. Another peak occured at 160°C in the region between 25.1 and 30.0 at.% Al, but its origin was not so well clarified. A brief discussion is made concerning the relaxation mechanism of the 130°C-peak.View full abstractDownload PDF (996K) -
Masaru Sasaki, Takeshi Matsuda, Kiyoshi Yonemitsu, Takao Sato1971 Volume 30 Issue 2 Pages 412-416
Published: February 15, 1971
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe variations of the Hall coefficient RH of indium and indium rich alloys (In–Tl and In–Pb) have been measured in the range of 1∼8000 atm at room temperature. The RH or pure In increases with the rate of 3.4×10−13 (m3/cou.)/katm, and changes its sign at about 8000 atm. For the sake of comparison, the variation of RH of Al and Pb have been also measured.
The observed results are discussed in terms of two conceivable origins: one is the anisotropic electron-phonon scattering and the other is the effect of the lattice potential.View full abstractDownload PDF (600K) -
Katsuhiko Hasebe, Toshio Okabe, Michi-hiko Mannami1971 Volume 30 Issue 2 Pages 417-421
Published: February 15, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe intensity distribution along the diffuse streaks in the electron diffraction patterns from the Guinier-Preston zones in Cu–Be alloy is analysed and a model of the structure of the zone is proposed.View full abstractDownload PDF (552K) -
Shinya Wakoh, Jiro Yamashita1971 Volume 30 Issue 2 Pages 422-427
Published: February 15, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSX-ray form factors of V, Cr, Fe, Ni and Cu, and magnetic form factors of Ni are calculated from the change density distributions obtained by the band calculation. The results depend much on the potential used, but not on the method, because Green function method gives almost the same results as APW method, if the potential is the same. Here, the form factors are evaluated from the wave functions obtained by the Green function method with the self-consistent potential. Then, the theoretical results are compared with those obtained by the experiments.View full abstractDownload PDF (744K) -
Shun-ichi Nakai, Takehiko Ishii, Takasi Sagawa1971 Volume 30 Issue 2 Pages 428-439
Published: February 15, 1971
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe profiles of Na+L23 absorption spectra of sodium halides have been measured in the vicinity of the threshold at room temperature and liquid nitrogen temperature. Apparent depression of the main bands caused by scattered light and second order light was diminished by minimizing the effect of scattered light and correcting the effect of second order light. Sharp doublets at the threshold, which are ascribed to creation of core excitons with holes in the 2p level of sodium, have large oscillator strengths as compared with other absorption bands in the spectra. The doublet can be decomposed approximately into two Gaussians at room temperature and two Lorentzians at liquid nitrogen temperature. These properties along with the nature of exchange energy between the electron and the hole of the core exciton are interpreted in terms of the electron-lattice and the electron-electron interactions and of the localized nature of the optical excitation involved.View full abstractDownload PDF (1376K) -
Masamitsu Hirai, Yasuhiro Kondo, Takehisa Yoshinari, Masayasu Ueta1971 Volume 30 Issue 2 Pages 440-448
Published: February 15, 1971
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSPrimary effects of ionizing radiation in alkali halides have been studied by the pulsed electron beam. In KCl, F and H centers are produced mainly by a fast process as reported previously. The half width of the F band, however, was ∼0.3 eV at ∼20 ns after the electron shot and decreased to ∼0.18 eV at ∼10 μS. The fast process as well as the wide half width of the F band suggest that the primary products are not negative ion vacancies and charged interstitials, but F and H centers. In NaCl most F centers are produced by a slow process within about 1 μS due to the trapping of an electron at a negative ion vacancy. Absorption bands considered to originate from triplet states of self trapped excitons are observed at 660 mμ and 610 mμ in KCl and NaCl, respectively. In connection with the decay time of these bands and with the growth time of the F band, mechanism of the F center formation is discussed.View full abstractDownload PDF (1304K) -
Michio Midorikawa, Yoshihiro Ishibashi, Yutaka Takagi1971 Volume 30 Issue 2 Pages 449-452
Published: February 15, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe pressure dependences of spontaneous polarization and dielectric constant of KNO3 single crystals were measured under hydrostatic pressure up to 3,000 kg/cm2. At 130°C, the spontaneous polarization is almost independent of pressure, keeping up the magnitude of 10.4 μC/cm2. The dielectric constant in paraelectric phase, phase I, obeys the Curie-Weiss law. The Curie constant C is, however, dependent on pressure. It can be expressed as
C(p)=5.63×103−0.68×103p(°K)
with p in 103 kg/cm2. The temperature difference Tc(p)−T0(p) also depends on the pressure, and can be expressed as
Tc(p)−T0(p)=89.7−11.2p(°K)
These results are discussed from a phenomenological theoretical point of view.View full abstractDownload PDF (476K) -
Yutaka Nigara, Mareo Ishigame, Takemaro Sakurai1971 Volume 30 Issue 2 Pages 453-458
Published: February 15, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSBy using a large solar furnace, yttrium oxide crystals were made by a fusion process, and their reflectivity was measured in the spectral region 700 to 10 cm−1, Several reststrahlen bands extending from 600 to 240 cm−1 were found. From the reflectivity curve, the parameters of seven lattice vibrations were analysed, and the optical constants in a wide spectral region were deduced. The transmittance measurement was made by using crystalline powder embedded in a polyethylene film and several weak bands were found in the far-infrared region. By measuring the transmittance of a thin plate of fused crystal, a number of summation bands were observed in the near-infrared region. In summarizing the bands, some considerations were given on the vibrational behaviour of yittrium oxide crystals.View full abstractDownload PDF (760K) -
Shigeru Sato, Takehiko Ishii, Ichiro Nagakura, Osamu Aita, Shun-ichi N ...1971 Volume 30 Issue 2 Pages 459-469
Published: February 15, 1971
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe Cl−L23 absorption spectra of thin films of CuCl, ZnCl2, CdCl2, PbCl2, MnCl2, FeCl2, CoCl2, NiCl2, MgCl2, CaCl2, SrCl2, and BaCl2 have been measured by the photographic method using synchrotron radiation from a 1.3 Bev electron synchrotron as a soft X-ray source. In all materials studied, other than CaCl2, SrCl2, and BaCl2, the absorption spectra near the threshold show absorption bands probably due to the creation of excitons with holes in the 2p level of chlorine. The intense and broad absorption continuum beginning around 211 eV is observed in all materials studied. This absorption is assigned to the atomic excitation of Cl− ions. Discussion is given about the profile of each spectrum.View full abstractDownload PDF (1308K) -
Naoki Koshizuka, Toshir\={o} Ban, Ikuji Tsujikawa1971 Volume 30 Issue 2 Pages 470-480
Published: February 15, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSZeeman effect of R1(14943.0 cm−1) and R2(14945.0 cm−1) absorption lines in TlCr-alum was studied in magnetic fields up to 27 kOe at liq. He temperature. The R1 and R2 lines are ascribed to the magnetic dipole transitions from 4A2 ground state to \barE and 2\barA excited states of 2E, respectively. The Agreement between the experimental and the predicted Zeeman patterns is quite good. The angular dependence of g-values of the excited states is explained by using the effective Hamiltonian, however, it is difficult to give a consistent explanation of the g-values in terms of the perturbation expression which are currently available.
Paschen-Back effects of the R lines was observed in pulsed magnetic fields up to 220 kOe at 77°K. These patterns are interpreted consistently in terms of the above assignment.View full abstractDownload PDF (1384K) -
Masaaki Tamatani, Toshiro Ban, Ikuji Tsujikawa1971 Volume 30 Issue 2 Pages 481-490
Published: February 15, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSZeeman effect of the R and B lines in GCrSH was measured. No difference was observed between the Zeeman patterns of the R1 and R2 absorption lines. Non-zero g-values of the excited states were obtained from the patterns in a magnetic field perpendicular to the trigonal axis. From these results, it is concluded that these two lines are not attributed to the two transitions 4A2→\barE(2E) and 4A2→2\barA(2E) of a Cr3+ ion, but to the transition 4A2→\barE(2E) in the two different Cr3+ sites. Both the B1 and the B1′ lines were assigned to 4A2→\barEb(2T2) from the Zeeman patterns in a high pulsed magnetic field.
New lines were found in the R-line region when GCrSH was diluted by aluminum. They are considered to originate from certain kinds of Cr3+ sites and to have relation with the ferroelectric character of the crystals. In the B-line region, however, no new lines were observed.View full abstractDownload PDF (1220K) -
Sh\={o}ichro Nomura, Takehiko Nakagawa1971 Volume 30 Issue 2 Pages 491-494
Published: February 15, 1971
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSSr(FeTa)1⁄2O3 is a disordered perovskite, tetragonal at room temperature, while Sr(CrTa)1⁄2O3 is an ordered perovskite, cubic at room temperature. These compounds make solid solutions in the whole range of composition. Tetragonal-cubic transition occurs at about 90 mol% of Sr(FeTa)1⁄2O3. Intensity of superstructure line of X-ray diffraction which shows the ordered arrangement of the B ions decreases gradually with increase of Sr(FeTa)1⁄2O3. Isomer shift is nearly constant, 0.64 mm/sec, for all compounds, the value of which is reasonable for Fe3+. The curve of the quadrupole splitting vs composition is rather complicated. We can give it a qualitative interpratation in terms of local distortion arising from the disordered distribution of the Ta, xFe and (1−x)Cr ions.View full abstractDownload PDF (480K) -
Sigemaro Nagakura, Yoshinori Chikaura1971 Volume 30 Issue 2 Pages 495-515
Published: February 15, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSMagnetic domains in well annealed [001] whisker crystals have been studied by X-ray topography. The three-dimensional shape of the rectangular domain observed by the powder pattern technique was found to be a cuboid. Qualitative explanation is given to the image contrast of 90° domain walls by the dynamical theory of X-ray diffraction in distorted crystals. The lattice distortion around the line of intersection of 90° and 180° domain walls was determined by the analysis of butterfly images. It was also found that the 180° domain wall is made visible by the application of magnetic field.
Fringe patterns appeared when the whiskers took the closure domain structure across the axis and also were elastically bent to produce the serrated domain wall. Dynamical calculation proves that they are the moiré fringes produced by the double diffraction in the adjacent domains.
Some observations about whisker tips and kinked whiskers are also described.View full abstractDownload PDF (5500K) -
Osamu Aita, Ichiro Nagakura, Takasi Sagawa1971 Volume 30 Issue 2 Pages 516-517
Published: February 15, 1971
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe satellite emission bands were found on both sides of the K emission band of graphite. Peak positions of these satellite bands are 247 eV and 316 eV, and the intensities are estimated as about 1% and 0.8% to that of the main K band, respectively. As usual, the high-energy satellite may be caused by double ionization of K level. The energy distance, 29.8 eV, from the main band to the low-energy satellite corresponds reasonably to the plasmon energy, 25 eV, for σ-electrons of graphite and the satellite might be attributed to a plasmon satellite, which has been believed to occur only in metals so far.View full abstractDownload PDF (228K) -
Makoto Natori, Michio Matsuzawa, Tsutomu Watanabe1971 Volume 30 Issue 2 Pages 518-521
Published: February 15, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe static and dynamic polarizabilities and the various oscillator strength sums are calculated for helium-like iso-electronic ions from Li+ through Ne8+. The perturbation variation technique is used and Clementi’s 4ζ wave functions are employed for the ground state wave functions. The oscillator strength sums S(k) in the length and the velocity forms agree with each other except for the case of S(2). It is found that the static polarizabilities are approximately proportional to (atomic number)−4.4. The atomic number dependence of the dynamic polarizabilities is also discussed.View full abstractDownload PDF (376K) -
P. K. Bhat, S. Narasimha Murthy1971 Volume 30 Issue 2 Pages 522-527
Published: February 15, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe allowed region for the guiding centre of a charged particle gyrating in superposed Heliotron and biconical cusp fields have been investigated by combining the motion of the guiding centre and the rotation of the particle around it. This is done by finding the stationary values of the guiding centre coordinates expressed ad functions of the particle coordinates. It is found that the guiding centre almost sticks to the leading line of force. Further, from the numerical integration of the non-linear set of equations governing the motion of a single charged particle, it is found that the particle remains in the allowed region. A comparison shows that the two approaches are in qualitative agreement with each other.View full abstractDownload PDF (428K) -
Masahiro Nishikawa, Yoichi Fuji-ie, Tokuo Suita1971 Volume 30 Issue 2 Pages 528-536
Published: February 15, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSIn a flowing mercury afterglow with d. c. discharge source, rapid decrease in intensity of Hg lines near the source are investigated. Both the axial intensity distribution along the flow downstream and the radial one are interpreted in connection with diffusion of electron to the wall and electron to the wall and electron attachment. The effective diffusion coefficient is found to be Dβ,γ=2.7×103⁄p(cm2/sec), which is close to the ambipolar diffusion coefficient under the experimental conditions i.e. ne=5×108/cm3 and Te=2 eV.
As for the resonance line (63P1−61S0), slow decrease in intensity as compared with decrease in intensity of lines emitted from the higher levels is taken to be due to the radiative imprisonment and in consequence the absorption coefficient of this line is obtained as 1.2×10−13n0/cm and the quenching cross section of the state 63P1 due to the collisions with mercury atoms as ⟨σ⟩10=0.048 Å2.View full abstractDownload PDF (1068K) -
Noriyoshi Sato, Hideo Sugai1971 Volume 30 Issue 2 Pages 537-548
Published: February 15, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSInvestigation has been made of propagating waves excited by a small coil surrounding a plasma column produced by a dc discharge at a pressure of a few μHg under a weak axial magnetic field. Measurements are made mainly of the (0, 2) mode excited on the cathode side of the exciting coil in the frequency range of 17–60 kc/sec. The waves are observed to have a forward-wave dispersion for lower frequencies, but a backward-wave dispersion for higher frequencies in this range. Their phase velocities are directed toward the exciter. These waves are theoretically predicted to propagate in a weakly ionized, current-carrying, uniform plasma under a weak magnetic field. The experimental data are in reasonable agreement with the theoretical results. The (0, 1) and (1, 1) modes excited on the cathode and anode sides are also studied experimentally in some detail. Some of the data are not interpreted yet.View full abstractDownload PDF (1524K) -
Shigeki Morioka, Koichi Tanaka1971 Volume 30 Issue 2 Pages 549-556
Published: February 15, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSEffects of dispersion due to the finite Larmor radius on the steady flow of a collisionless plasma past a thin symmetrical semi-infinite wedge are considered on the basis of the modified Chew-Goldberger-Low theory. The flow field near the tip is given by the numerical integration of the Fourier transform. The asymptotic behaviour of the flow field at a far distance from the wedge is estimated by using the method of stationary phase or Laplace’s method. It is shown that the flow field is subject to remarkable variety of dispersion effect according to the main flow conditions.View full abstractDownload PDF (812K) -
A. Sedov, A. V. Gopalakrishna, G. A. Nariboli1971 Volume 30 Issue 2 Pages 557-562
Published: February 15, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSAn expansion procedure is developed for studying the effects of dissipative mechanisms and nonlinearity on a linear three-dimensional wave. The procedure is considered general enough to use all the ideas of ray theory and singular surface theory in problems when no real characteristics exist. An appropriate similarity hypothesis relates all smallness parameters to an inner parameter, interpreted as the reciprocal Reynolds number. In the frame of reference chosen to describe the vicinity of the linear wave, one obtains compatability conditions and speed in the first stage and a generalized Burgers’s equation in the second stage.View full abstractDownload PDF (712K) -
Michiru Yasuhara, Toshio Kondo1971 Volume 30 Issue 2 Pages 563-566
Published: February 15, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA reactive, equilibrium hypersonic gas flow over a slender body is treated. The reaction considered is ν1A+ν2B=(ν1+ν2)C, and it is assumed that the molecular weights, and the specific heats at constant pressure of species “A”, “B” and “C” are the same respectively. It is shown that approximate similarity solutions exist for power law bodies rb∼xm. Numerical results for several values of m for two dimensional bodies and bodies of revolution are presented for the reaction N2+O2=2NO.View full abstractDownload PDF (428K) -
Syozo Kubo1971 Volume 30 Issue 2 Pages 567-571
Published: February 15, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSOne dimensional steady flow of a grey gas past a grey non-reflecting heat source is studied. This linearized problem is not only a model of radiative furnace but also one of the simplest problems which concern the interaction between the convection and the thermal radiation. The conductivity and the viscosity are neglected. The kernel substitution solution is obtained and its correction is tried. The exact form for weak radiation and near the heat source for arbitrary radiation strength, the solution by diffusion approximation without slip and numerical results are obtained and compared with each other. The temperature profile shows almost symmetric feature for weak radiation. But when radiation is strong, it gradually shifts far up-stream against the convective cooling and rapidly attains its asymptotic value downstream. Radiation slips are also calculated.View full abstractDownload PDF (572K) -
Hideyuki Niimi1971 Volume 30 Issue 2 Pages 572-574
Published: February 15, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe thermal creep flow of a rarefied gas between two parallel plates is investigated on the basis of a relaxation model of the Boltzmann equation for all range of the Knudsen number. The velocity profile as well as the volume flow rate is calculated.View full abstractDownload PDF (292K) -
Shin-ichi Katsuki, Makoto Kunimune1971 Volume 30 Issue 2 Pages 575
Published: February 15, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (132K) -
A. M. Stoneham1971 Volume 30 Issue 2 Pages 576
Published: February 15, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (168K) -
Kengo Adachi, Kiyoo Sato, Sy\={u}go Kubo, Kiyotaka Yamauchi1971 Volume 30 Issue 2 Pages 577
Published: February 15, 1971
Released on J-STAGE: May 29, 2007
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Noriaki Kazama, Hiroshi Watanabe1971 Volume 30 Issue 2 Pages 578
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Taneo Nishino, Toshio Yanagida, Yoshihiro Hamakawa1971 Volume 30 Issue 2 Pages 579
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Taizo Sasaki, Yasuo Iguchi, Hidenao Sugawara, Shigeru Sato, Takao Nasu ...1971 Volume 30 Issue 2 Pages 580
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Taizo Sasaki, Yasuo Iguchi, Hidenao Sugawara, Shigeru Sato, Takao Nasu ...1971 Volume 30 Issue 2 Pages 581-582
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Masahiro Inoue, Makoto Okazaki1971 Volume 30 Issue 2 Pages 582
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Yôichi Iida1971 Volume 30 Issue 2 Pages 583-584
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Masao Aozasa, Kichinosuke Yahagi1971 Volume 30 Issue 2 Pages 584
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Yoshiaki Kato, Shuichi Iida1971 Volume 30 Issue 2 Pages 585
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Ikuo Suzuki, Ryuji Abe1971 Volume 30 Issue 2 Pages 586
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Akira Nagasawa1971 Volume 30 Issue 2 Pages 587
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Shun’ichi Kishimoto, Hideo Akimune, Tokuo Suita1971 Volume 30 Issue 2 Pages 588
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Hirotoshi Souma, Kaoru Suzuki, Masayasu Ueta1971 Volume 30 Issue 2 Pages 589-590
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Yasuo Suzuki1971 Volume 30 Issue 2 Pages 590
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