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Tetsuo Wakatsuki, Noriaki Takahashi, Katsumichi Suzuki, Takahisa Itaha ...
1970 年 29 巻 4 号 p.
815-826
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
The spectrum and angular distribution of alpha particles scattered by
27Al at 22.2 MeV bombarding energy have been measured. Among the prominent peaks in the spectrum, those corresponding to excited states at 5.434, 6.547, 7.28 and 7.50 MeV were studied by measuring the gamma ray spectrum in coincidence with scattered alpha particle. From the measured gamma ray branching ratios, (5/2, 7/2, 9/2)
+ was assigned to the former two levels and 7/2
− was assigned to the latter two levels. In addition, from gamma ray transition rate consideration, 3/2
−, 9/2
+ and (3/2, 5/2)
+ were found appropriate for 4.055, 4.508 and 5.491 MeV level respectively.
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S. P. Sud, P. N. Trehan
1970 年 29 巻 4 号 p.
827-836
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
Gamma rays in the decay of
124Sb are investigated with scintillation spectrometers using γ-γ coincidence, sum-peak coincidence and γ-γ angular correlation techniques. The 4π-sum coincidence spectrometer study indicates a crossover transition from the 2693 keV level. The γ-γ coincidence studies confirm the existence of levels at 2040 and 2773 keV and several weak gamma rays observed from these levels. The directional correlation for nine gamma ray cascades are measured. From the results of these directional correlation measurements it has been possible to assign spin and parity 4
+ to the 1248 and 1962 keV levels. It has been possible to limit the spin assignment to 2040 keV level to 1, 2 and 3 from angular correlation measurements on 715–(722)–603 keV cascade. This assignment has been further limited to 2
+ or 3
+ on the basis of comparison of experimental level structure to that of theoretical level structure. The mixing ratio for several gamma rays have been found out.
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Masuo Suzuki, Chikao Kawabata, Syu Ono, Yukihiko Karaki, Masuo Ikeda
1970 年 29 巻 4 号 p.
837-844
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
The partition functions of the two- and three-dimensional finite Ising models in the presence of a magnetic field have been calculated with use of a high-speed computer. Periodic boundary conditions were imposed. All the numbers of configurations for the 3×3×3, 5×5, and 4×6 lattices are tabulated. The distribution of zeros of the partition functions in the complex magnetic-field plane has been obtained both for the ferro- and antiferromagnetic cases. The zeros in the ferromagnetic cases are distributed on the unit circle according to the Yang-Lee theorem, and the dependence on temperature of the distribution functions has been studied. In the antiferromagnetic case most of zeros are on the negative real axis, but a certain number of complex roots appear in the left half of the plane.
The magnetization and the magnetic susceptibility have been calculated as functions of temperature.
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Shigetoshi Katsura, Yoshihiko Abe, Katsuji Ohkohchi
1970 年 29 巻 4 号 p.
845-850
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
The partition functions of the Slater’s models of ferroelectricity (KDP model), antiferroelectricity (F model) and Wu’s modified KDP model are calculated for lattices of finite size (up to 6×6). The distributions of the zeros of the partition function of the KDP model in the complex fugacity (
z≡exp
V⁄
kT) plane are on the unit circle at low temperatures and are two-dimensionally distributed at high temperatures. In case of the F model the distribution of zeros are two-dimensional in all temperature region.
The zeros of the KDP model at low temperatures in the complex
z2N plane are on the unit circle, and those at high temperatures lie on the negative real axis. The zeros of the F model in the complex
z2N plane lie on the negative real axis at high and low temperatures. The distribution of zeros of the KDP model, the F model and the modified KDP model in the complex temperature plane are also obtained.
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Tohru Morita
1970 年 29 巻 4 号 p.
850-855
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
It is shown that the method of the two-time Green’s function, in the first order approximation of the binary kernel, leads to the same type of divergence for the many-boson systems, as a divergence noticed for the case of the Heisenberg model. By introducing the “collision kernel” and collecting all the terms of the second order of the collision kernels, a convergent result is achieved. The result gives a justification for the manipulation which Morita and Tanaka proposed in order to obtain the Dyson’s
T4 term for the Heisenberg ferromagnet.
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Takashi Okada
1970 年 29 巻 4 号 p.
856-863
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
Richter type after effects and change of the complex permeability (μ′–μ″) with frequency were observed in high purity YIG containing a small amount of Ca
2+. Several Richter type after effects with different activation energies were found and peak values of tanδ of these after effects were found to depend strongly on Ca
2+ content.
Dependence of the peak value of tanδ, the induced anisotropy energy and the A. C. resistivity on Ca
2+ content was studied. From these investigations, we found that the after effects can be classified into three groups, viz., (1) the effect caused by Fe
2+, (2) the effect caused by the Fe
4+ captured by Ca
2+ and (3) the effect caused by Fe
4+ which are not captured by Ca
2+.
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Kazuo Kanematsu, Yuko Fujita
1970 年 29 巻 4 号 p.
864-868
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
In Laves phase compounds Zr(Fe
1−xM
x)
2 where M=V, Cr, the crystal structure changes from MgCu
2 type to MgZn
2 type with composition
x. MgCu
2 type compounds are ferromagnetic and MgZn
2 type compounds are paramagnetic. The local symmetry of the surroundings of Fe affects the magnetic moment. Magnetization measurement on MgCu
2 type compounds shows that V and Cr atoms act on the magnetic moment of Fe to decrease at the rate of 1.4 μ
B and 0.4 μ
B. Decrease of the magnetization is interpreted by assuming a discrete magnetic moment distribution of Fe, which are obtained from the configuration of V or Cr atoms in the surroundings of Fe.
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Yasukage Oda, Kunisuke Asayama
1970 年 29 巻 4 号 p.
869-878
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
The precise measurements of the ESR linewidth of Mn in dilute CuMn and AuMn alloys (0.05∼1.5 at.% of Mn) with Fe, Co, V and Ni impurities have been made over the temperature range from 1.4°K to about 200°K. The Mn spin relaxation due to magnetic impurities is well understood by the
s-
d exchange scattering of conduction electrons by these impurities. The temperature dependence of the spin-flip scattering probability is studied. From this study,
TK of Co in CuCo alloy is estimated to be about 1000°K. The effect of fhe
s-
d scattering on the spin relaxation remains even below
TK. It is clarified that the first Born approximation gives a good agreement with experimental results at
T\gtrsim
TK, at least with respect to the relaxation problem. The results at
T\lesssim
TK are discussed by Suhl and Kondo’s theory of the
s-
d exchange scattering.
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Kazuhiko Yamaya, Takashi Sambongi, Tadayasu Mitsui
1970 年 29 巻 4 号 p.
879-884
発行日: 1970/10/05
公開日: 2007/05/29
ジャーナル
認証あり
The superconducting transition temperature,
Tc, the magnetic susceptibility and lattice constants were measured.
Tc strongly depends upon the density of states at the Fermi surface estimated from the magnetic susceptibility. The electron interaction parameter of the Bardeen-Cooper-Schrieffer theory of superconductivity was found to be approximately 0.09 eV/atom for all the compounds investigated. The dependence of the volume of unit cell upon electron concentration is similar to that of
Tc and the density of states over the concentration range investigated. These results are consistent with a two-band model of superconductivity in transition metals, proposed by J. Kondo.
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Kazuyoshi Takeda, Motohiro Matsuura, Taiichiro Haseda
1970 年 29 巻 4 号 p.
885-889
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
Magnetic phase transition in the solid solution of two antiferromagnets, CoCl
2·6H
2O and NiCl
2·6H
2O, was studied by measurements of specific heat and magnetic susceptibility. The dependence of the Néel temperature
TN(
x) on concentration
x was obtained. Near
x=0.50, a dip was found on
TN(
x)−
x curve. In the specific heat curve, the width of peak at the half value of its height was wider in the solid solution than in each pure salt. The specific heats diverged logarithmically at the Néel point in the whole range of concentration giving the critical exponent α′(
x)=0. The slope of the logarithmical divergence and the temperature region ε(=1−
T⁄
TN(
x)) in which the relation of logarithmical divergence α′(
x)=0 holds are discussed.
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Arisato Kawabata
1970 年 29 巻 4 号 p.
890-901
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
Raman scattering of light by magnons and Stoner excitations in ferromagnetic metals is treated microscopically on the assumption that the magnetic electrons can be described by itinerant model. A microscopic theory of Raman scattering in metals is developed on the basis of the thermal Green function method. The total scattering efficiency of the one magnon process is estimated to be 10
−13∼10
−14 for iron in optical regions, and that of the one Stoner excitation process is expected to be the same order of magnitude although it depends on the details of the band strucrure.
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Arisato Kawabata
1970 年 29 巻 4 号 p.
902-911
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
Line shape of E.S.R. absorption by conduction electrons in fine metallic particles is discussed paying main attention to the effects of the quantization of electronic energy levels. Line width and shift is considered to be caused by spin-orbit interaction, which is characterized by a parameter τ=
a⁄
VFΔg2, where
a,
VF and
Δg are the linear dimension of the particles, Fermi velocity and
g-shift of the conduction electrons respectively. In order that the effects of energy level quantization be observed, the mean level spacing should be larger than h⁄τ as well as than the Zeeman energy.
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Tyuzi Ohyama, Kazuo Murase, Eizo Otsuka
1970 年 29 巻 4 号 p.
912-924
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
Electron scattering by phonons and neutral impurities as well as electron capture by the latter in silicon and germanium have been studied between 0.5 and 4.2°K through He
3-coolant at the frequency of 71 GHz. The scattering relaxation time by phonons in ultra-high purity materials is compared with the calculation by Ito
et al. and by Meyer.
In addition, a spin polarization effect on neutral impurity scattering at the quantum limit, hω
s>
kBT, has been studied for
n-type materials. This problem has been treated in a way similar to the
e−-H atomic scattering and a simple analytical calculation for the scattering of spin polarized electrons by spin polarized donors is carried out on the basis of Schwartz’s work. This calculation yields an essential agreement with the experimental results. For silicon doped with phosphorus and germanium doped with indium, spin polarization effects on electron capture by neutral impurity are observed.
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Hiroshi Kanzaki, Shiro Sakuragi
1970 年 29 巻 4 号 p.
924-935
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
Low temperature optical spectra are studied on AgBr:Cl
− in comparison with AgBr. Contrary to AgBr:I
−, no bound excitons at chlorine are formed in AgBr:Cl
−. Absorption spectra of AgBr:Cl
− are similar to AgBr, except for existence of exciton absorption without phonon assistance. Photoluminescence spectra of AgBr and AgBr:Cl
− contain emission band due to decay of free exciton. This observation leads one to conclude that positive holes in AgBr are not self-trapped even at 2°K. Comparison of free exciton transition energies between absorption and emission spectra reveals existence of two kinds of phonons assisting the indirect transition. Various extrinsic emission bands are also observed. One of them corresponds to shallow-bound exciton at Cd
2+ -type impurity and the other to deep-bound exciton at residual iodine. Transition energies of free and bound excitons, except iodine-bound exciton, shift to higher energy in proportion to chlorine concentration. These results can be explained by virtual crystal model for AgBr:Cl
− in which valence band is lowered in comparison with AgBr.
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Hiroshi Kanzaki, Shiro Sakuragi
1970 年 29 巻 4 号 p.
936-945
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
Low temperature optical spectra are studied on AgBr:Na
+ and :Li
+. Optical transitions corresponding to creation and decay of free indirect exciton can be understood in terms of virtual crystal model accompanied with increase of exciton gap energy in proportion to alkali concentration. In luminescence, the free exciton emission increases intensity relative to extrinsic emission with increasing alkali concentration. Emission spectra are entirely dominated by free exciton decay below 4.2°K for alkali concentration above 1×10
−2 mol. Temperature dependence of free exciton emission intensity below 4.2°K revealed splitting of the free exciton energy level. Addition of 10
−3 mol of Na
+ or Li
+ enhances relative intensity of the medium-bound exciton decay and it is concluded that alkali impurities in AgBr can bind excitons when their concentrations are relatively low.
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Koichi Matsuura, Hiroshi Kawamoto, Tokuo Suita, Noriaki Itoh
1970 年 29 巻 4 号 p.
946-952
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
Effects of lattice defects produced by electron irradiations and firing in Cd vapor on the photoelectric properties of CdSe have been investigated. The magnitude of persistent photoconductivity, that is, the increment of conductivity which is persistent in dark for many hours following photoexcitation at low temperature, increases by firing in Cd vapor and decreases by firing in Se
2 vapor.
The persistent photoconductivity decays, as the temperature is increased, with the activation energy of 0.26 eV. Persistent photoconductivity is also produced by electron irradiation. It is considered that the persistent photoconductivity is induced by a lattice defect produced either by firing in Cd atmosphere and by electron irradiation. The threshold energy for production of the defects by electron irradiation is obtained and shown to be 270±30 keV. These defects are annealed out at 350°K. The activation energy of annealing is about 1.25 eV and frequency factor is 4×10
13 sec
−1. It is concluded that the defects responsible for the persistent photoconductivity is the Se vacancy which acts as a double acceptor.
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Shigeru Asano
1970 年 29 巻 4 号 p.
952-963
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
The nonlinear phenomena of damping are analysed in detail and formulated in two integral transformations; the volume and time integrals. This formulation enables one to examine the relationship between damping and tensile experiments in the microstrain range, and to describe the phenomena consistently in terms of dislocation behavior. An analysis of the amplitude-dependent internal friction is made by the use of the breakaway and friction models under the quasi-static condition. The generalized friction model is presented, which is the most appropriate for the analysis of internal friction under the steady-state vibrations in usual experiments. Several convenient formulae are given for the interpretation on dislocation mechanisms. This approach includes some earlier work such as the Granato-Lücke theory and the Davidenkov-Pisarenko formulation as a special case. In addition, the applicability of the Granato-Lücke theory is critically examined with reference to recent observations of stress-strain hysteresis.
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Takeo Iri, Katsuyasu Kohno
1970 年 29 巻 4 号 p.
963-968
発行日: 1970/10/05
公開日: 2007/05/29
ジャーナル
認証あり
The paramagnetic resonance spectra of Mn
2+ in three alkali chlorides,
i.e., LiCl, NaCl and KCl were measured over the temperature range from room to liquid nitrogen temperature. The fine structure constants
D and
E of a Mn
2+-vacancy center varied linearly with temperature. In LiCl, these constants were almost insensitive to temperature. In NaCl and KCl, the constants were appreciably dependent on temperature, and the fractional changes of those were larger in KCl than in NaCl by a factor of about three. The behaviours under temperature were qualitatively interpreted from the view point of the ionic arrangements around Mn
2+.
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Akikatsu Sawada, Yoshiyuki Mase, Yutaka Takagi, Michio Midorikawa
1970 年 29 巻 4 号 p.
969-972
発行日: 1970/10/05
公開日: 2007/05/29
ジャーナル
認証あり
Phase transition of NH
4H
2PO
4 at 148°K was studied through a polarizing microscope. As is in the case of ND
4D
2PO
4, the
a and
b axes in the orthorhombic (antiferroelectric) phase are found parallel to either one of equivalent two
a axes in the original tetragonal (paraelectric) phase. Antiferroelectric domains were observed with a sensitive colour plate. The domain boundaries are easily moved by application of very weak mechanical stresses.
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Tadasu Suzuki, Atsusi Tanokura
1970 年 29 巻 4 号 p.
972-978
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
Using a crystalline beryllium specimen, the excitation of plasma oscillation by X-rays was confirmed by examining the inelastic scattering for chromium
Kβ
1 and copper
Kβ
1 rays at various observation angles. The X-rays suffered an energy loss, which was equal to the plasmon energy of the solid and also satisfied the dispersion relation predicted by the free electron gas theory. The inelastic scattering was still observed beyond the critical angle estimated by the theory. At lower scattering angles the spectral breadth of the scattering was about 4 eV, which corresponds to the plasmon life time of 1.5×10
−16 sec. As the angle was increased the breadth rapidly broadened and the scattering gradually disappeared.
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Yutaka Nakai, Nobuhiko Kunitomi, Yasusada Yamada
1970 年 29 巻 4 号 p.
978-986
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
The magnetic form factors of gold-chromium alloys with 23.5 and 18.4 atomic percent chromium were studied by means of neutron diffraction. The results were analyzed by considering the contributions of 3
d and free electrons with R–K–K–Y polarization. The experimental form factors normalized by the atomic magnetic moment obtained by the susceptibility measurement were
f=(0.85±0.13)
fCr+(0.11±0.19)
fs, for 18.4 atomic percent chromium, and
f=(0.816±0.028)
fCr+(0.152±0.034)±
fs, for 23.5 atomic percent chromium, respectively.
The results indicated that
s and
d-electrons should polarize parallel in contradiction to the results of Kondo effect. It is shown in this paper that this dilemma can be removed if we assume that the
s-
d exchange interaction constant
J is dependent on the magnitude of scattering vector.
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Kanji Kubota
1970 年 29 巻 4 号 p.
986-997
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
Two kinds of nonlinear optical effect in a material under the influence of a static magnetic field are theoretically discussed, that is, two-photon transition between magnetic energy levels and a light-intensity-dependent Faraday rotation. Optical anisotropy induced by an intense light beam in a material is compared with that due to a magnetic field. A circularly polarized light acts as an effective magnetic field. Properties of the conductivities describing these nonlinear effects are considered from the quantum mechanical expression of the conductivity tensor.
In II–VI semiconductors, the symmetric-tensor component of the nonlinear conductivity induced by the optical field of several tens of megawatts is the comparable order of magnitude to the antisymmetric-tensor component of the linear conductivity due to the magnetic field of several hundred gausses. The nonlinear Faraday rotation is proportional to the magnetization in magnetic materials.
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Kanji Kubota
1970 年 29 巻 4 号 p.
998-1006
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
One of the nonlinear optical effects in semiconductors in a static magnetic field is studied. The nonlinear conductivity induced by both a magnetic field and an intense optical field shows a light-intensity-dependent magnetic rotation. This is demonstrated experimentally by using a pulsed magnetic field and pulsed optical fields. The antireciprocity of this nonlinear rotation with respect to the direction of the applied magnetic field is shown. The rotation angle obtained in the present experiment is of the order of 10
−1 deg/cm.
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Ryuzo Koyama
1970 年 29 巻 4 号 p.
1006-1011
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
The excluded volume effect of chain polymers is calculated by using the flexible random coil model.
The intramolecular energy of polymer is assumed to be given by the product of the binary cluster integral of polymer segments and their contact probability which is determined from a segments-distribution function appropriately assumed. This intramolecular energy becomes a function linearly decreasing with the end to end distance of the polymer.
The result of excluded volume effect obtained from this potential function coincides almost with that by the third order perturbation theory. The expansion coefficient α of the end to end distance can be given by the approximate equation
α
x−α
x−2=(2π⁄3)
1⁄2z,
x=4.3∼5.0,
where
z is the interaction parameter of segments.
The intramolecular energy function assumed is compared with the expression obtained by Fujita
et al., and the segments-distribution function is recalculated, which is found to be nearly the same as that first assumed.
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Masamitsu Kosaki, Hiroto Ohshima, Masayuki Ieda
1970 年 29 巻 4 号 p.
1012-1017
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
The relation between
dc conductivity evaluated from one-minute current after a voltage application and reciprocal temperature bends notably above 50°C supposedly due to an ionic layer build-up near an electrode and also due to the clean-up of charge carriers. The existence of the ionic layer is supported by the
ac conductivity calculated from dielectric loss vs. 1⁄
T curve and also by the current maximum in the current-time curves after the reversal of applied voltage polarity. The apparent activation energy of conduction
Ec is about 23 kcal/mole. The mobility of charge carriers is estimated (μ\simeq2×10
−8 cm
2/volt. sec at 102°C) from an initial slope of current-time curves assuming the clean-up effect of charge carrier and its activation energy
Eμ is obtained as 16 kcal/mole. The difference of
Ec and
Eμ may give rise to a discussion of the origin of ions.
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Shinzou Kubota
1970 年 29 巻 4 号 p.
1017-1029
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
An experimental investigation has been performed of the ionization yield by α particles in binary gas mixtures over the whole range of mixing ratio. The ionization yield for A–N
2 mixture, in which their ionization potentials are almost equal, agrees numerically well with the estimate from the theory proposed by Huber
et al. on the assumption that the ionization yield in the individual component gas is proportional to the energy dissipated primarily by the α-particle in the gas. The additional ionization yield over the estimate from the theory is observed for He–Ne, A–Kr, A–Xe and Kr–Xe mixtures when the second gas is contained more than several percent in the mixture. This can be interpreted by the non-metastable Penning (NMP) ionization. For He–A mixture, the relative contribution of the NMP and metastable Penning (MP) process to the total ionization yield is estimated.
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Hitoshi Fujii, Hiroki Nakamura, Masatake Mori
1970 年 29 巻 4 号 p.
1030-1040
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
Ionization cross sections of Hydrogen atoms by collisions with metastable Helium atoms are calculated on the basis of the local complex potential method. Complex potentials are estimated by the valence bond (
VB) method. The results show that the cross sections for He
* (2
1S)+H and He
* (2
3S)+H are 1.27
a02 and 129
a02, respectively, at the energy of relative motion 0.001 a.u. and that the temperature dependence of the reaction rate in the former case (∼
T1.0) is more remarkable than that in the latter (∼
T0.1). It is found that the real part of the complex potential plays an important part in these processes.
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Masao Okamoto, Tsuneo Amano, Kazuo Kitao
1970 年 29 巻 4 号 p.
1041-1053
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
Drift, drift-dissipative, and drift-cyclotron instabilities in an inhomogeneous plasma are considered for the case when a uniform high-frequency electric field is applied along the magnetic field. For the applied field, the dipole approximation is made and the skin effect is neglected. Without averaging the distribution function over the period of the applied electric field, the dispersion relations are derived for both the collisionless and collisional regimes. It is found that the high-frequency field whose frequency is within some ranges increasing the frequencies of perturbations can stabilize drift instabilities and also drift-cyclotron instabilities with finite
kz of the fluid-type, where
kz is the component of the wave vector along the magnetic field. It is found, however, that when the unstable drift-dissipative mode is stabilized the stable mode becomes unstable.
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Kumeyo Kishi, Katsutoshi Sawada, Takayoshi Okuda, Yoshiharu Matsuoka
1970 年 29 巻 4 号 p.
1053-1061
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
The breakdown and the growth of plasma of cesium and sodium vapors by an intense laser beam are investigated. The minimum intensity which is observable by a double probe is found to be inversely proportional to the root of the neutral atom density for either vapor. This result confirms that the two-photon ionization is a dominant process in the stage of breakdown. Further increase of the intensity of laser beam leads to a steep rise of the plasma density proportional to the square of the intensity followed by a slow rise and then the second steep rise. The first steep rise is explained by the two-photon ionization process too. The electron temperatures are estimated to be about 10
4°K under the condition of the present work, by the probe and optical methods.
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Masaki Takashima
1970 年 29 巻 4 号 p.
1061-1068
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
The effect of uniform rotation on the onset of thermal instability in a horizontal layer of the Maxwell liquid is considered assuming that both the bounding surfaces are free. Linear perturbation method is used to derive an eigenvalue system of eighth-order and an exact eigenvalue equation for neutral instability is obtained. Numerical results are presented. It is found that the Coriolis force has, in the main, destabilizing effect on a Maxwell liquid in contrast with its stabilizing effect on an ordinary Newtonian liquid; further, that discontinuous changes in the critical values of the wave number and the frequency occur for certain ranges of parameters.
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Tsunehiko Kakutani, Takuji Kawahara
1970 年 29 巻 4 号 p.
1068-1073
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
Weak nonlinear ion-acoustic waves in a plasma consisting of cold ions and warm electrons are investigated by using a nonlinear perturbation method. In the lowest order of perturbation, it is found that the system of equations for the ion-acoustic waves can be reduced to the following single nonlinear dispersive-dissipative equation:
(
Remark: Graphics omitted.)
where
u, ξ and τ are normalized velocity of ion-fluid, stretched space and time coordinates, respectively. The parameter μ is a measure of dispersion due to charge separation, whereas ν is a measure of dissipation due to electron-ion collisions. It is shown that this equation has either oscillatory (dispersion-dominant case) or quasi-monotone (dissipation-dominant case) shock wave solutions.
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Shouji Shinohara
1970 年 29 巻 4 号 p.
1073-1087
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
The mechanism of formation of the rhythmic pattern of precipitates in one-dimensional Liesegang phenomena is investigated quantitatively. The outerelectrolyte diffuses into the gel which is impregnated with the innerelectrolyte, leaving the insoluble reaction product as hydrophobic sol particles. Diffusion proceeds as an advance of a contact surface of two electrolytes. The advance of the sol front is studied theoretically. Flocculation occurs suddenly when the total ionic concentration at the end of a sol region exceeds the flocculation value. Flocculation spreads rapidly in the region till it reaches the head of it, when proceeding stops. And from here the next sol region begins to spread.
The estimation of the flocculation value is made and the proceeding meachanism of the flocculation front is theoretically investigated. By the periodic repetition of these phenomena, the periodicity and the spacing and time laws can be fully explained quantitatively.
抄録全体を表示
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Hidefumi Imura, Koji Okano
1970 年 29 巻 4 号 p.
1088
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
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Yasunori Tanji
1970 年 29 巻 4 号 p.
1089
発行日: 1970/10/05
公開日: 2007/05/29
ジャーナル
認証あり
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Yasuo Morimoto, Muneyuki Date
1970 年 29 巻 4 号 p.
1090
発行日: 1970/10/05
公開日: 2007/05/29
ジャーナル
認証あり
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Michiko Terada, Keizo Endo, Yuko Fujita, Tetuo Ohoyama, Ren’iti ...
1970 年 29 巻 4 号 p.
1091
発行日: 1970/10/05
公開日: 2007/05/29
ジャーナル
認証あり
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Tadashi Miyashita, Toshiaki Murakami
1970 年 29 巻 4 号 p.
1092
発行日: 1970/10/05
公開日: 2007/05/29
ジャーナル
認証あり
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Yasuo Morimoto, Muneyuki Date
1970 年 29 巻 4 号 p.
1093
発行日: 1970/10/05
公開日: 2007/05/29
ジャーナル
認証あり
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Kenzô Kai, Takurô Nakamichi, Mikio Yamamoto
1970 年 29 巻 4 号 p.
1094-1095
発行日: 1970/10/05
公開日: 2007/05/29
ジャーナル
認証あり
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Kazuko Inoue, Yoji Nakamura
1970 年 29 巻 4 号 p.
1095
発行日: 1970/10/05
公開日: 2007/05/29
ジャーナル
認証あり
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Hirofumi Shimizu, Koji Sumino
1970 年 29 巻 4 号 p.
1096
発行日: 1970/10/05
公開日: 2007/05/29
ジャーナル
認証あり
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Koichi Matsuura, Sanji Fujimoto
1970 年 29 巻 4 号 p.
1097
発行日: 1970/10/05
公開日: 2007/05/29
ジャーナル
認証あり
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Takashi Towyama
1970 年 29 巻 4 号 p.
1098
発行日: 1970/10/05
公開日: 2007/05/29
ジャーナル
認証あり
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Masaaki Tamatani, Kazuto Yokota, Toshio Nishimura
1970 年 29 巻 4 号 p.
1099
発行日: 1970/10/05
公開日: 2007/05/29
ジャーナル
認証あり
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Hiroo Komura, Masaaki Sekinobu
1970 年 29 巻 4 号 p.
1100
発行日: 1970/10/05
公開日: 2007/05/29
ジャーナル
認証あり
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Yoshimasa Isawa
1970 年 29 巻 4 号 p.
1101
発行日: 1970/10/05
公開日: 2007/06/01
ジャーナル
認証あり
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Hiroshi Yasuoka, Takeji Kubo
1970 年 29 巻 4 号 p.
1102-1103
発行日: 1970/10/05
公開日: 2007/05/29
ジャーナル
認証あり
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Daisuke Kato
1970 年 29 巻 4 号 p.
1103
発行日: 1970/10/05
公開日: 2007/05/29
ジャーナル
認証あり
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Seiichi Ariga
1970 年 29 巻 4 号 p.
1104
発行日: 1970/10/05
公開日: 2007/05/29
ジャーナル
認証あり
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Yoshiei Nakano, Hiroshi Sato, Michio Matumoto
1970 年 29 巻 4 号 p.
1105-1106
発行日: 1970/10/05
公開日: 2007/05/29
ジャーナル
認証あり