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Eizo Tajima, Minoru Adachi, Tadayoshi Doke, Shinzou Kubota, Masahiro T ...
1967 年 22 巻 2 号 p.
355-360
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
The spectrum of the cosmic ray produced neutrons was measured between 1 ahd 10 MeV as a function of altitude. The detectors used were organic liquid scintillators to which a pulse shape discrimination technique was applied to select pulses of recoil protons. The proton spectrum was converted to the neutron spectrum by making use of response function of the detectors. The best fit of the neutron spectrum between 2 and 10 MeV is φ
n(
En)=0.30exp(−0.0046
x)
En−0,77−0,0010x neutrons/cm
2 sec. MeV, where
x is an altitude in g/cm
2. The flux of neutrons of the same range of energy is dependent on altitude as exp(−0.0063
x) in a good approximation.
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Hiroyasu Ejiri
1967 年 22 巻 2 号 p.
360-367
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
Comparison of negatron decays with positron decays is made for allowed GT type transitions from the ground 1
+ states in odd-odd nuclei to the ground 0
+ and first 2
+ states in even-even nuclei. The
ft values of negatron decays are systematically larger than those of positron decays by factors 2∼12. The difference between log
ft values of negatron decays and positron decays is discussed in terms of the theoretical effective coupling constant
geff and the pairing model.
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Shinsaku Kobayashi, Hiromichi Kamitsubo, Kenji Katori, Akira Uchida, M ...
1967 年 22 巻 2 号 p.
368-378
発行日: 1967/02/05
公開日: 2007/05/29
ジャーナル
認証あり
In order to obtain a direct measure of the strength and form of the nuclear spin-spin interaction, the transmission of 0.92 MeV polarized neutrons by polarized
165Ho was measured. The total cross section and relative scattering angular distribution of 0.92 MeV unpolarized neutrons through unpolarized
165Ho nuclei were also measured in order to make a parameter search of the optical potential. The experimental results are analyzed with Davies and Satchler’s DWBA formalism. The results show that the effective spin-spin interaction between a free neutron and a
165Ho nucleus, is an attraction type and its strength has the order of one MeV, and the present experimental result together with other data obtained at ORNL and Stanford, can be fitted by the DWBA approach in either case of a volume and surface type of the form factor. For the further determination of the strength and the form of the spin-spin interaction, more precise similar experiments are needed for various different neutron energies.
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Eiko Hiroike
1967 年 22 巻 2 号 p.
379-392
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
Electron coupled proton spin-spin interactions in saturated hydrocarbon molecules.
JHH′, are investigated theoretically. The general formula for
JHH′ is derived by double perturbation method, in which (
Remark: Graphics omitted.) (the Fermi interactions between electrons and proton-spins) and (
Remark: Graphics omitted.) (correlations between electrons) are taken as perturbations. The calculation is performed up to first order in (
Remark: Graphics omitted.). It is shown that the zeroth order term in (
Remark: Graphics omitted.) becomes nearly equal to zero under the approximation, in which energy differences between the ground state and the excited states are replaced by a suitable mean. Therefore,
JHH′ calculated by the molecular orbital method without configuration interactions is a part of
JHH′, which is different from the one calculated by the valence bond method with the above approximation. The order of magnitudes of the zeroth and the first order term in (
Remark: Graphics omitted.) are compared in the case of methane molecule.
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Michio Matsuzawa, Hiroki Nakamura
1967 年 22 巻 2 号 p.
392-398
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
The cross-section for the exact resonance excitation transfer process H(2S)+H(1S)→H(1S)+H(2S), of which the interaction is a short range one, is calculated at energies of relative motion of 0.03, 0.1, 0.3, 1.0, 3.0, 5.0 and 10.0 eV by the perturbed stationary state method (PSS method). The interaction energies between hydrogen atoms are calculated by the Heitler-London method. The results are in good agreement with the results of the impact parameter method for energies of relative motion over 1.0 eV.
The disagreement below 1.0 eV is due to the presence of the potential barrier in the
3Σg adiabatic potential of the excited hydrogen molecule. The cross-section calculated by PSS method is 33.1π au (atomic unit) at 0.03 eV.
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Takayoshi Amano, Eizi Hirota, Yonezo Morino
1967 年 22 巻 2 号 p.
399-412
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
The molecular constants in the first excited vibrational state of the
32SO radical are obtained as well as in the ground state. The equilibrium constants are much improved;
Be=21609.5
5±0.15 Mc/sec, λ
e=157780±25 Mc/sec, and
re=1.48108±0.00005Å. Spectra of other two isotopic species,
34SO and
33SO, are also analyzed. Hyperfine interaction due to the
33S nucleus is studied in detail, and (
Remark: Graphics omitted.), (
Remark: Graphics omitted.), (
Remark: Graphics omitted.) are obtained. The Stark effect of the
33SO spectra is worked out in detail and utilized for the assignment of the weak lines.
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Nobuhiro Go
1967 年 22 巻 2 号 p.
413-416
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
Kikuchi’s theory of irreversible cooperative phenomena is extended so as to treat cooperative chemical kinetics. A state distinguished chemically from others (a chemical state) is made up of a number of physically distinguishable states. When probabilities of transitions between states belonging to a same chemical state are large compared with those between states belonging to different chemical states, the path entropy of a heat bath is shown to be
Sb(
t,
t+
Δt)=Const.−
ΔFs(
t,
t+
Δt)⁄2
T,
where
ΔFs(
t,
t+
Δt) is the amount of free energy increase in the system during the time interval
Δt, and
T is the temperature of the heat bath. This expression of the path entropy of a heat bath can be used in chemical kinetics, since statistical weight parameters of a chemical system are given in a form exp(−β
f),
f’s are not energies but free energies.
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Nobuhiro Go
1967 年 22 巻 2 号 p.
416-427
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
The kinetics of Zimm-Bragg’s model is studied theoretically. Application is made of the theory which was proposed by Kikuchi and extended to chemical kinetics by the present author, and an exact and closed nonlinear kinetic equation is derived. The equation contains three kinetical parameters θ
0, θ
1, θ
2. Near the equilibrium state the equation is linearized and the relaxation times τ are calculated numerically as functions of
s, θ
0, θ
1, θ
2 (σ being assumed to be 2×10
−4). A comparison of a relaxation time versus temperature curve, which will be experimentally obtainable, for instance, by the
T-jump method, with the theoretical τ–
s curves here obtained will enable the determination of a set of values of kinetic parameters θ
0, θ
1, θ
2. The approximation proposed by Vol’kenstein, Gotlib and Ptitsyn is examined and compared with our exact treatment and it is concluded that the approximation is not good.
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Kazuhiko Itagaki
1967 年 22 巻 2 号 p.
427-431
発行日: 1967/02/05
公開日: 2007/05/29
ジャーナル
認証あり
Measurement of self-diffusion in ice ⊥(00,1) and ⊥(10,0) were made by a tracer sectioning method using single crystals from Mendenhall Glacier, Alaska. U.S.A.. The activation energies of diffusion
D⊥(00,1) and
D⊥(10,0) are 0.54eV and 0.65eV respectively. Among the several possible mechanisms the “free interestitial molecule mechanism” is the only mechanism which would give higher activation energy of diffusion along ⊥(10,0) than ⊥(00,1).
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Morikazu Toda
1967 年 22 巻 2 号 p.
431-436
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
Vibration of a chain of particles interacting by nonlinear force is investigated. Using a transformation exact solutions to the equation of motion are aimed at. For a special type of interaction potential of the form
(
Remark: Graphics omitted.)
exact solutions are actually obtained in terms of the Jacobian elliptic functions. It is shown that the system has N “normal modes”. Expansion due to vibration or “thermal expansion” of the chain is also discussed.
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Hisayosi Niu, Masao Shimizu
1967 年 22 巻 2 号 p.
437-444
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
Concentration dependence of elastic constants for binary alloys with cubic symmetry are calculated by the lattice theory of Born and von Karman. Central forces between nearest are next-nearest neighbors and angular forces only between nearest neighbors are taken account. Atomic force constants for A–B alloys are given by the average of the atomic force constants for A–A, B–B and A–B pairs weighted by the probability of appearance for these pairs. The elastic constants are expressed by the mean atomic force constants and their concentration dependence is given by a quadratic equation of concentration, which is consistent with the experiments for Ag–Au and Cu–Ni alloys. The variation of the Debye temperatures with concentration is calculated by using the calculated elastic constants and its result is compared with the experiments.
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Yukio Mizuno, Yoshihiro Ohmura
1967 年 22 巻 2 号 p.
445-449
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
Inelastic scattering of X-rays by localized electrons, such as
K-electrons, in solids is treated theoretically. The wave length of X-rays is chosen to be longer than the orbital radius of localized electrons, but still short enough so that the photon energy is much higher than the ionization energy. On the basis of reasonable approximations, it is found for polycrystals that the differential cross section is proportional to
ν
02t(ν
0−ν)(1+cos
2θ)sin
2(θ⁄2).
Here ν
0 and ν are respectively the frequencies of the incident and scattered X-rays, θ being the scattering angle. ν
t(ν) is a quantity proportional to the cross section of absorption of the X-rays with frequency ν by the same electrons. The above expression has recently been confirmed experimentally.
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Yoshihiro Hishiyama
1967 年 22 巻 2 号 p.
449-456
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
The ordinary transport properties of the Cu–Cd, Ag–Zn, Cu–Zn and Cu–Al γ phases have been measured. The results show an anomaly in the
e⁄
a dependence of the Hall coefficients and thermopowers for each γ phase. Up to present stage, we have no theories which treat these anomaly precisely. On the basis of multi bands model, probable suggestions are proposed. This interpretation does not contradict with the usual image of the electronic structure of the γ phase.
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Sumiaki Nagai
1967 年 22 巻 2 号 p.
457-462
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
The total energy of MnO crystal is calculated on the basis of the Heitler-London approximation by means of the variational method taking the analytical 2
p wave function of O
−− ion as the variational function. The 2
p wave function obtained is compared with other published wave functions. The calculated values of the total energy is −8.012
e2⁄
aH.
The cohesive energy and the lattice constant of MnO crystal are calculated to be 796 Kcal/mol, 2.275Å respectively, while the observed values are 923 Kcal/mol, 2.217Å respectively.
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Tetsuhiko Tomiki
1967 年 22 巻 2 号 p.
463-487
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
Optical measurements were carried out on the reflectivity and absorption tails of KCl single crystals over the region 6.0 to 12 ev in the temperature range 10 to 573°K. With use of these data, Kramers and Kronig analysis was made on reflectivity spectra for three different temperatures 10, 78 and 295°K. The analysed spectra of important optical constants are presented in this article, and their properties are discussed in order to clarify the excitonic picture in a single crystalline lattice. The result is analysed along the theories of Toyozawa and Elliot. It was found that the first exciton line shape and the plateau in the higher energy side of the step are explained by them. The two overlapping components of the first band can be well separated at low temperatures in the case of single crystals, and this permits us to determine an oscillator strength for each component as 0.27 and 0.375 for (
Remark: Graphics omitted.) and (
Remark: Graphics omitted.)-transition, respectively. Attempts were made to express the spectrum by an analytic expression in the first exciton band region.
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Takenari Goto, Masayasu Ueta
1967 年 22 巻 2 号 p.
488-498
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
Luminescence and photoconductivity spectra in evaporated films or polycrystals of CuBr have been studied. Relationship between the emission and absorption spectra, leads to the conclusion that the resonance emission is due to the annihilation of an intrinsic exciton of the lowest energy. An emission line similar to
I1 in CuCl and other narrow emission lines are found. These are considered to arise from bound excitons. Equidistant structure is observed in emission spectra of some films as well as in an excitation spectrum of the resonance emission. The energy difference between the peaks in the structure is equal to the transversal optical phonon energy. On the basis of various experimental results, a radiative annihilation process of an intrinsic exciton is discussed. From the photoconductivity spectrum, the band gap energy is estimated to be 3.02 eV at 8°K. The thermal activation energy for the dissociation of the lowest energy exciton is obtained as 0.10±0.02 eV from the resonance emission intensity vs. 1/T curve.
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Kenzaburo Marukawa
1967 年 22 巻 2 号 p.
499-510
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
The characteristic motion of dislocations in copper single crystals of low dislocation density has been studied by etch pitting, especially near yield stress. Dislocations are presumed to be locked at each position in as-annealed crystals. The motion of dislocations due to the application of stress is composed of three processes: (1) unlocking from the as-annealed position, (2) moving at a high speed,
e.g. 400 cm/sec at a stress of 22 g/mm
2, and (3) stopping at a certain final position depending on the stress level below yield stress. It is considered tentatively that the locking is due to discrete pinning by impurity atoms, and the main obstacles to the dislocation motion are thought to be other locked dislocations. From quantitative studies of each process a possible mechanism of yielding of copper crystals is suggested.
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Kaizo Nakamura
1967 年 22 巻 2 号 p.
511-516
発行日: 1967/02/05
公開日: 2007/05/29
ジャーナル
認証あり
The fundamental absorption spectra of the mixture of KI and RbI are investigated. The first Peak of four prominent exciton absorption bands and the so called interband transition ‘step’ absorption are displaced in parallel each other and almost linearly with the change of composition of the mixture. This means that the binding energy of the first exciton remains constant over the whole concentration range. The second and the third ones above the step reverse their relative intensities at about 20 atomic percent of RbI concentration. The separation between them becomes narrower as the concentration of the dopant is increased, and at about 40 percent of RbI, it amounts to less then 3/4 of those in pure materials. A hump on the low energy tail of the fourth peak becomes indistinguishable at concentration higher than 10 percent of dopants. No new absorption is observed below 7.5 eV. The possible interpretation of the absorption spectra is discussed.
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Yozo Kaifu, Yoshio Kawate, Shigemitsu Nakanishi, Ichihiko Niwa, Katsur ...
1967 年 22 巻 2 号 p.
517-524
発行日: 1967/02/05
公開日: 2007/05/29
ジャーナル
認証あり
The fluorescence emission was investigated in single crystal specimens of CuCl at low temperatures. Strong emission lines of instrumentally limitted width are observed at wavelengths in the range of exciton absorption below 20°K. These lines are associated with recombination radiations from free and bound excitons with or without phonon cooperation, and they shift toward higher energy with increasing temperature as are observed in the exciton absorption bands. The average temperature coefficient of all the peak energy at low temperature is +2.5×10
−4 eV/°K.
From the temperature dependence of the emission intensity, the activation energies of the various processes are estimated; the ionization energy of the exciton is 0.16 eV and the binding energies of the bound exciton complexes ranged between 0.03 and 0.007 eV.
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A. Mookherji, T. Mookherji
1967 年 22 巻 2 号 p.
525-528
発行日: 1967/02/05
公開日: 2007/05/29
ジャーナル
認証あり
Spectroscopic pure variety of rare earth sulphates is studied magnetically in aqueous solution by a microbalance specially designed for the purpose. It is observed that the magnetic moments in state of aqueous solution are smaller than those of the crystalline state, opposite of what has been observed with ions of the iron group. It is also observed that the paramagnetic complexes in aqueous solution become less anisotropic than in crystalline state in conformity with the theoretical findings regarding the distortion and shielding of 4f electrons by 5s- and 5p-electron shells.
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Masaru Mita
1967 年 22 巻 2 号 p.
529-538
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
The low power ferromagnetic resonance behavior at room temperature was measured on a magnetically anisotropic material, Zn
2Y, with the object of studying relaxation processes on the basis of magnon manifold. The linewidth of monocrystalline Zn
2Y under a uniform mode resonance condition exhibits four kinds of maxima with increasing angle θ
H of the applied
dc field with respect to the crystallographic
c axis. The first maximum is at θ
H=0° and is small. The second maximum is the largest and extends over the entire region of θ
H. The third and fourth maxima are small and attend on the larger angular tail of the second maximum. It may be concluded that the second maximum is due to the two-magnon decay of the uniform mode and the third due to the three-magnon decay of the uniform mode.
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Masayuki Shiga
1967 年 22 巻 2 号 p.
539-546
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
Magnetic properties of Fe
65(Ni
1−xMn
x)
35 ternary alloys which have the f.c.c. structure over the whole range of
x were investigated. It was found that the alloys are antiferromagnetic in the composition range of 1≥
x>0.3 and are ferromagnetic in the composition range of 0≤
x<0.3. In the ferromagnetic region, the Curie temperature and the spontaneous magnetization decrease rapidly with increasing
x or with the decrease of mean electron concentration. Many physical properties of the alloys are discussed on the basis of three postulates,
i.e., 1) electrons at Mn sites have itinerant character, 2) electrons at Ni sites have localized character and 3) at Fe sites, electrons have itinerant character in the antiferromagnetic range and localized character in the ferromagnetic range. The relation between the atomic distance and the magnetic moment is discussed. The origin of the Invar effect is qualitatively explained on these bases.
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E. Šimánek, Z. Šroubek, M. Tachiki
1967 年 22 巻 2 号 p.
547-551
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
The effect of correlation on the degree of covalency in transition metal salts is discussed using a configuration interaction approach. It is shown that the electron transfer accompanied by a one-electron excitation of the redistribution or polarization type represents an important two-electron excitation which produces an appreciable enhancement of the spin-density at the ligand.
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Koji Kosuge
1967 年 22 巻 2 号 p.
551-557
発行日: 1967/02/05
公開日: 2007/05/29
ジャーナル
認証あり
Magnetic properties in VO
2 have been studied in the temperature range from 100 to 380°K with the Mössbauer effect measurement of Fe
57 doped in VO
2. Above and below the transition temperature, no internal field is observed. The observation indicates that VO
2 is paramagnetic even below the transition temperature and then it was concluded that the drastic transition in VO
2 from semiconductor to metal is caused by some origin other than the magnetic ordering.
The nature of the chemical bond in VO
2 has been also discussed from the impurity effect on the magnetic susceptibility. The origin of the phase transition which appeared in V
2O
3 and VO
2 was systematically discussed in the light of Goodenough’s model.
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Hisashi Abe, Motohiro Matsuura, Akira Hirai, Junsuke Haruna, Mamoru Me ...
1967 年 22 巻 2 号 p.
558-572
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
NMR of Mn
55 and N
14 in Mn
4N were studied in its ferrimagnetic ordered phase, by using both pulsed and steady state methods. Three resonance lines are separately observed from corner site Mn (Mn-I), face-centered site Mn (Mn-II) and N. The resonance line of Mn-II is much broader than those of Mn-I and N, and has a complex structure, which can be accounted for as a powder pattern of quadrupole split lines modified by an anisotropic hyperfine interaction. The hyperfine field at Mn-I is antiparallel to, and those at Mn-II and N, are parallel to the macroscopic magnetization. Resonance frequencies of Mn-I and N decrease with temperature as usual, whereas that of Mn-II increases initially with temperature, it then follows a steep fall off. From the temperature dependences of these resonance frequencies and sub-lattice magnetizations, derived by neutron diffraction, the phenomenological isotropic hyperfine coupling constants including the transferred hyperfine coupling are estimated. Some discussions are given of these results.
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Yukito Tanabe, Ken-Ichiro Gondaira
1967 年 22 巻 2 号 p.
573-581
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
It is shown that the observed features of the spinwave sideband structures in MnF
2 can be understood by assuming the transition mechanism proposed earlier and led to a successful interpretation of the infrared two magnon absorption.
Selection rules of the magnon induced optical transition are discussed taking explicitly the symmetry of the crystal and orbitals into account. The results predict that the line shapes of the σ and π absorption should be opposite to those of the infrared absorption as is really the case. Calculated line shapes are in qualitative agreement in the case of σ1 (σ-polarized, at 18477.1 cm
−1) and π1(π-polarized, at 18460.8 cm
−1), but not with σ2 (at 18485.3 cm
−1). Sidebands in FeF
2 are also discussed.
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Kazuo Yamagata
1967 年 22 巻 2 号 p.
582-589
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
The weak ferromagnetism of Mn(HCOO)
2·2H
2O is studied by torque measurement below 3.7°K. The direction of the ferromagnetic moment is parallel to the
c-axis above 1.7°K and to the
b-axis below this temperature. The magnitude of the ferromagnetic moment in the low temperature phase (1.1×10
3emu/mole at 1.3°K) is considerably larger than that in the high temperature phase (1.9×10
2emu/mole at 2.0°K). It is pointed out that the difference can be explained by considering both of Dzyalcshinsky-Moriya and NiF
2-type mechanisms.
The effect of the external magnetic field on the phase change at 1.7°K is studied by observing transitions induced by the external field at temperatures near 1.7°K. The transition is detected by measuring d
M⁄d
H as a function of
H. The angular dependence of the flopping field at 1.3°K and the temperature dependence of the flopping field can be explained by a conventional theory.
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Kanji Hirabayashi
1967 年 22 巻 2 号 p.
590-597
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
Stresses around an edge dislocation near a free surface are calculated using two kinds of elastic representations (Volterra dislocations): One is a ring deformed by removal of a slice of uniform thickness and the other is a ring deformed by slip. Only the former is shown to yield a stable network plane of dislocations parallel to a free surface. The conditions of stability of the network plane are discussed in relation to a compressive surface stress. The network plane seems to give a possible explanation of superstructures observed on the (111) surfaces of diamond-type crystals.
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Takashi Joko, Akira Fukuhara
1967 年 22 巻 2 号 p.
597-604
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
Simultaneous diffraction of X-ray is theoretically studied for four cases in which the relevant reciprocal points form an isosceles triangle, an equilateral triangle, a square, or a regular hexagon. Explicit expressions are derived for the X-ray wave-field in the crystal when all sets of the diffracting planes concerned satisfy the Bragg condition simultaneously. These expressions give the absorption coefficient characteristic of each polarization-type and eventually explain the anomalous transmission owing to the simultaneous diffraction for the particular configurations. In the case of the equilateral-triangle configuration, the smallest absorption coefficient is the same as in the case of a single diffraction corresponding to a side of the triangle. In all the other cases enhancements of the anomalous transmission are predicted. Some of the results are compared with the experiment by G. Borrmann (Z. Krist.
121 (1965) 6).
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Kunizô Shinano, Hiroshi Itô
1967 年 22 巻 2 号 p.
605-610
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
Behavior of a charged particle in a biconical cusp field is numerically investigated using a statistical approach. The present considerations are restricted to the case where a particle starts from one of point cusps, traverses the midplane and encounters the other point cusp. At the starting point of a particle, the values of the constant of motion and its magnetic moment are fixed, but the phase of gyration is chosen uniformly in the region (0, 2π). Statistical distribution for the magnetic moment of the particle in the latter adiabatic region is obtained. The probability that the magnetic moment of this particle becomes larger than the previous or a certain value is estimated.
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Katsumichi Yagi, Goro Honjo
1967 年 22 巻 2 号 p.
610-625
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
Electron microscopic study of single crystal films of NaCl containing CaCl
2 was performed in more detail than that previously reported (J. Phys. Soc. Japan
19 (1964) 1892), with respect to climb motion of grown-in dislocations during observation and with respect to precipitation of CaCl
2. A characteristic interaction between climbing dislocations was observed and the sign of climb motion was determined to be positive by a new method based upon the characteristic black-and-white aspect of a dislocation image near the foil surfaces, which is due to the anomalous absorption effect. It was also concluded that as incipient precipitates nucleate, they introduce an abnormal 1/6〈112〉 type displacement in the matrix along {111} precipitation planes and they preferentially nucleate on a dislocation causing dissociation of it into two partial segments. The climb motion is discussed in connection with the observations and a model for the nucleation and growth process of the precipitate is given.
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Kiyoshi Yatsui, Yoshio Inuishi
1967 年 22 巻 2 号 p.
626-634
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
The helical instability and oscillations in short positive columns immersed in longitudinal magnetic field are experimentally investigated. It was found that several higher order modes of helical instabilities begin to grow in turn with azimuthal mode number
m coexisting with helical
m=1 mode as the magnetic field increases above a critical field
Bc for the
m=1 mode. Helical
m=1 mode acompanies higher harmonics due to the nonlinearities above
Bc. The nonlinear effects are enhanced with increasing magnetic field and carrier density. Oscillation frequency of the helix first increases with increasing magnetic field and finally decreases passing through a maximum in accordance with a nonlinear theory of Holter and Johnson. In a sufficiently short positive column, the plasma is always stable for all modes of instabilities independent of the magnetic field being in agreement with a short column theory of Timofeev.
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Osamu Aono
1967 年 22 巻 2 号 p.
634-637
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
A beam injected in a plasma loses its energy owing to a resonant interaction, when the system approaches an unstable state. The interaction is treated in the framework of the wave theory, because the close binary collisions are not affected by the instability. The rate of energy loss is much larger than the value obtained by use of the test particle method.
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Humio Naruse
1967 年 22 巻 2 号 p.
638-653
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
In order to see the qualitative properties of the Hall effect in the magnetohydrodynamic flow past a body at large magnetic Reynolds number
Rm and large Reynolds number
Re, the steady, incompressible flow near a two-dimensional stagnation point is studied on the assumption that a magnetic field is parallel to the velocity at infinity upstream and normal to the surface of the wall which is an insulator.
For small values of the Hall parameter and pressure number series solutions are derived and the formulae for the local skin friction are obtained for
Rm⁄
Re<<1, =1, >>1. It is shown that the component of the skin friction, which is normal to the flow direction at infinity upstream, is positive or negative according as
Rm⁄
Re>>1 or <<1, and the Hall effect produces little change in the skin friction for (
Remark: Graphics omitted.).
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N. S. Bhatnagar, R. P. Gupta
1967 年 22 巻 2 号 p.
653-656
発行日: 1967/02/05
公開日: 2007/05/29
ジャーナル
認証あり
Creep in a circular membrane, fixed at the boundary, has been studied on the basis of a non-linear law. It is found that both the stress and displacement components change with time. Solutions in terms of infinite series have been obtained. These solutions are more general than the ones which were previously obtained by Odqvist. A numerical example has also been given.
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Toru Kishii, Kazuo Ooka
1967 年 22 巻 2 号 p.
657
発行日: 1967/02/05
公開日: 2007/05/29
ジャーナル
認証あり
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Kiyoshi Sugibuchi
1967 年 22 巻 2 号 p.
658
発行日: 1967/02/05
公開日: 2007/05/29
ジャーナル
認証あり
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Hirotaka Yokoyama, Ryuji Watanabe, Shu Chiba
1967 年 22 巻 2 号 p.
659
発行日: 1967/02/05
公開日: 2007/05/29
ジャーナル
認証あり
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Keiichi Imakubo
1967 年 22 巻 2 号 p.
660
発行日: 1967/02/05
公開日: 2007/05/29
ジャーナル
認証あり
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Takeshi Hiraoka, Tetsuo Kitai, Eiji Tatsumoto
1967 年 22 巻 2 号 p.
661
発行日: 1967/02/05
公開日: 2007/05/29
ジャーナル
認証あり
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Kanji Ogawa, Shin-ichi Matsuoka, Kantaro Senda
1967 年 22 巻 2 号 p.
662
発行日: 1967/02/05
公開日: 2007/05/29
ジャーナル
認証あり
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Kunio Aiki, Kenzi Hukuda
1967 年 22 巻 2 号 p.
663
発行日: 1967/02/05
公開日: 2007/05/29
ジャーナル
認証あり
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Hiroshi Taneichi, Katsufusa Shoda
1967 年 22 巻 2 号 p.
664
発行日: 1967/02/05
公開日: 2007/05/29
ジャーナル
認証あり
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Masayoshi Azuma
1967 年 22 巻 2 号 p.
665
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
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Mitsuo Satoh, Paul R. Spencer, Charles P. Slichter
1967 年 22 巻 2 号 p.
666
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
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Nobukata Nagasawa, Hideyuki Nakagawa, Yoshio Nakai
1967 年 22 巻 2 号 p.
667
発行日: 1967/02/05
公開日: 2007/06/01
ジャーナル
認証あり
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Kazuhiko Yoshida, Mikio Yamamoto, Takashi Onozuka
1967 年 22 巻 2 号 p.
668
発行日: 1967/02/05
公開日: 2007/05/29
ジャーナル
認証あり
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Yasuhiro Shinnaka
1967 年 22 巻 2 号 p.
669
発行日: 1967/02/05
公開日: 2007/05/29
ジャーナル
認証あり
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Shizuo Miyake, Kazunobu Hayakawa, Rokuro Miida
1967 年 22 巻 2 号 p.
670
発行日: 1967/02/05
公開日: 2007/05/29
ジャーナル
認証あり
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Toshitaka Idehara, Reiji Sugaya, Yasushi Terumichi, Shigetoshi Tanaka, ...
1967 年 22 巻 2 号 p.
671
発行日: 1967/02/05
公開日: 2007/05/29
ジャーナル
認証あり