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Hiroyoshi Sekiguchi
1969 Volume 26 Issue 3 Pages
589-599
Published: March 05, 1969
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The level schemes of V
50, Mn
54, Co
58 and Fe
57 have been investigated with the Ge(Li) detectors and the scintillation counters by using triton induced reactions. These results were also compared with the (
p, γ) reactions. Gamma-rays at energies of 92, 122, 158 and 225 keV on V
50: 55, 156, 212 and 250 keV on Mn
54: 112 and 367 keV on Co
58: were observed. By using the residual activities the reaction characteristics of the triton induced reaction were investigated. The spin distribution in the Mn
55(
t,
n)Fe
57 reaction is calculated with the compound nucleus model and the ratio of the population probability obtained is 5/8 for the
J=7⁄2 and
J=5⁄2 states on Fe
57. New gamma-rays which expected from the rotational model on Fe
57 were searched for with this reaction. But they were not observed.
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Hideo Kitazawa, Nobuhiro Yamamuro
1969 Volume 26 Issue 3 Pages
600-606
Published: March 05, 1969
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The (
n, α) reaction on
12C has been investigated by bombarding a thin polyethylene film with 14.1 MeV neutrons. The emitted α-particles were detected by a CsI(T1) scintillation detector and distinguished from other particles by applying the pulse-shape discrimination method. The angular distribution of the α-particles leaving the residual nucleus
9Be in the ground state was strongly peaked at about 40° and at the backward hemisphere in the center-of-mass angles, predicting the presence of direct interaction processes. The ground state transition cross section of 76±11 mb was obtained. The forward peaking was compared with the plane wave theory, for both the pick-up and knock-on processes. The reduced width amplitude of the α-cluster at the nuclear surface of
12C was determined by attempting the theoretical fit to the backward peak of the angular distribution in terms of the heavy-particle stripping model. Comparing this value with those obtained from other reactions on light nuclei, it seems that the α-cluster reduced width amplitudes are considerably large for the nuclei being amenable to the α-particle model such as
12C and
16O.
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Takakazu Shintomi, Masayoshi Masuda
1969 Volume 26 Issue 3 Pages
607-614
Published: March 05, 1969
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The dipole states of O
16 nucleus are well explained with the theory of the shell model which includes the interaction between one-particle and one-hole. For the valuation of the single-particle excitation model it is important to investigate the decays of the dipole states of O
16 to excited states of a residual N
15 nucleus.
An O
16(γ,
p)N
15 reaction experiment was investigated with nuclear emulsions. O
2 natural gas target was irradiated with bremsstrahlung of 23 and 27 MeV maximum energies from a 31 MeV betatron. The energy distributions were obtained.
Almost of the 22.2 MeV state did not decay to the positive parity doublet of N
15 at 5.3 MeV and more than the 90% of the 24.6 MeV state decayed to the ground state and the third excited state. The results of the present work well agreed with some other experiments.
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Hiroki Nakamura
1969 Volume 26 Issue 3 Pages
614-620
Published: March 05, 1969
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By dealing with the system of the coupled radial Schroedinger equations, many-state collision problem is investigated theoretically. Replacing the Green operators of the radial differential Schroedinger operators by their δ-function parts, we can treat the problem successfully with some allowance foe effects of all coupling potentials. The method employed in the author’s previous papers is used to treat the non-local complex potentials. As a demonstration a three-state case is considered and a new approximate formula for scattering matrix is derived. In a certain limiting case the formula obtained reduces to a corresponding one in the BII approximation proposed by Seaton for electron-atom collisions. This formula will be applicable to a wide class of collision processes.
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R. Kamal, R. G. Mendiratta
1969 Volume 26 Issue 3 Pages
621-623
Published: March 05, 1969
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The phonon vibrational frequencies of thallous chloride have been calculated in various symmetry and off-symmetry wavevector directions using shell model. The calculated temperature dependence of specific heat from the vibrational spectrum is in good agreement with the experimental results. However, out results predict higher value for Debye-temperature
ΘD at 0°K than the one reported earlier based on Houston’s series expansion method using elastic constant data.
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Hajime Hirooka, Nobuhiko Saitô
1969 Volume 26 Issue 3 Pages
624-630
Published: March 05, 1969
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The long-time behaviors of the vibration in two dimensional square lattice with central and noncentral forces between nearest neighbors are calculated on computer. The forces are assumed to have quartic potentials with the anharmonic coupling constant λ besides the harmonic ones. Computer experiments revealed the existence of the induction period, and after the elapse of the induction period, the energy sharing takes place among various modes and the system tends to reach a thermal equilibrium. The induction period becomes large for small coupling constant λ and seems to become infinity at a small critical value of λ
0. When λ is less than this critical value λ
0, the system is almost periodic, but when λ is larger than λ
0, the system becomes ergodic.
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Kengo Adachi, Kiyoo Sato, Motohiko Takeda
1969 Volume 26 Issue 3 Pages
631-638
Published: March 05, 1969
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The magnetic properties of dichalcogenide compounds, CoS
2, CoSe
2, NiS
2, NiSe
2 and the system Co(S
xSe
1−x)
2, were studied by means of magnetic measurement, neutron diffraction and NMR. The exchange interaction
Jsw of the ferromagnetic CoS
2 (
Tc=124°K, θ
p=220°K,
peff=1.76
μB,
n=0.84
μB and
Hi=52 kOe) was estimated to be 24 cm
−1 per Copair from the analysis of spin wave theory. While, CoSe
2 (
TN=90°K, θ
p=−160°K and
peff=1.72
μB) showed an antiferromagnetic spin ordering with MnSe
2 type. NiS
2 (θ
p=−740°K and
peff=2.48
μB) had no magnetic ordering even at 4.2°K. NiSe
2 exhibited weak constant paramagnetism with metallic conductivity. In Co(S
xSe
1−x)
2, (0≤
x≤1), the magnetic properties and the magnetic phase diagram were determined, and this system showed to have “low spin state” with 1
μB per Co. Some discussions were given from the theoretical stand points.
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Kiyoo Sato, Kengo Adachi, Tetsuhiko Okamoto, Eiji Tatsumoto
1969 Volume 26 Issue 3 Pages
639-641
Published: March 05, 1969
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The change of the Curie point of CoS
2 under hydrostatic pressure up to 5.3 kbar was investigated, and the value of
ΔTc⁄
ΔP was obtained to be −0.86 deg·kbar
−1. The linear compressibility of FeS
2, having approximately the same crystal structure with CoS
2, was measured, and the value of (1⁄
l) (
Δl⁄
Δp) was given as 2.31×10
−7 bar
−1 at 296°K. The relation between the change of the Curie point and the interatomic distance was obtained from the both results. This result was applied to an explanation of the ferromagnetic property of Co(S
xSe
1−x)
2, and the exchange interaction of this system was discussed. An iso-volume magnetic phase diagram of this system was illustrated.
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Masumi Hattori, Kengo Adachi, Huzio Nakano
1969 Volume 26 Issue 3 Pages
642-651
Published: March 05, 1969
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A statistical-mechanical calculation on the system of spins of quantum number one half which constitute a face-centred cubic lattice and couple not only with the nearest-neighbour spins but also with the second-neighbour spins due to the exchange interactions is carried out with the use of the inverse temperature expansion. By the application of this calculation, the magnetic and thermal properties of cobalt dichalcogenide compound Co(S
xSe
1−x)
2 of various values of the fraction
x with pyrite structure is discussed, assuming that the antiferromagnetic exchange coupling between a pair of second-neighbour spins gets stronger with decreasing of the fraction
x. The correspondence between the theory and experiment is quite well in all respects. The appearance of a certain metamagnetic transition is predicted in the compound of an intermediate
x value which is not ferromagnetic although no ample measurement of the magnetization in variable magnetic field at various temperatures has been carried out yet enough to examine the existence of this kind of transition. The heat capacity is also discussed.
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Ryozo Aoki, Taiichiro Ohtsuka
1969 Volume 26 Issue 3 Pages
651-662
Published: March 05, 1969
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The results of an experimental study on the residual resistance, specific heat and magnetic susceptibility of dilute solid solutions (ranging from 0.1 to 0.4 at. %) of V, Cr and Mn in aluminum are presented. The experimental data are analysed on basis of the Anderson model in order to estimate parameters which characterize the localized
d-state,
i. e. the mean conduction band-
d-state (
sd) admixture, the localized level width, the mean
d-state occupation number and the intra-atomic
d–
d coulomb energy. The level width is evaluated to be about 0.2 eV. The results are combined with the change in the superconducting transition temperature measured in the same alloy system (reported in Part I) to discuss the properties of the localized
d-state in light of recent theoretical studies by Ratto and Blandin, and Takanaka and Takano.
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Hideaki Ido, Kiwamu Shirakawa, Takanobu Suzuki, Takejiro Kaneko
1969 Volume 26 Issue 3 Pages
663-665
Published: March 05, 1969
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Temperature dependence of lattice parameters of CrTe was measured in a temperature range from 113°K to 413°K, by the method of X-ray diffraction. Large expansion of the lattice was observed as temperature lowered through the Curie point (345°K). Exchange striction was obtained by subtracting normal thermal expansion due to lattice vibration from the observed thermal expansion curve. Temperature dependence of the exchange striction thus directly observed was shown to agree fairly well with that deduced, on the basis of the molecular field theory proposed by Bean and Rodbell, from results of the pressure effect of the Curie temperature and temperature dependence of saturation magnetization.
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Motohiro Matsuura, Yoshitami Ajiro, Taiichiro Haseda
1969 Volume 26 Issue 3 Pages
665-673
Published: March 05, 1969
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The magnetic critical phenomena of canted antiferromagnet in two dimensional lattice; Mn(HCOO)
2·2H
2O were studied by the measurement of the dependences of AC magnetic susceptibility on amplitude and frequency of measuring AC field. The induced uniform susceptibility χ
iu in the immediate neighborhood of
TN could be successfully derived by analyzing the results. The critical divergence of χ
iu at
TN found to be well expressed as |
T−
TN|
−γ and γ=1.7±0.1. The value of γ is discussed in the view point of magnetic ordering in two dimensional lattice. The magnetic dispersion of χ
iu was observed in very low frequency region. It is probably the first observation of critical dispersion of magnetic susceptibility near
TN. The result is discussed from the phenomenological point of view for canted antiferromagnet and it is suggested that it directly reflects the critical slowing down of antiferromagnetic staggered mode through weak canting interaction of this salt.
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V. J. Minkiewicz, G. Shirane
1969 Volume 26 Issue 3 Pages
674-680
Published: March 05, 1969
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Neutron inelastic scattering experiments show that the phase transition of KMnF
3 at 184°K is a result of the softening of the
Γ25 phonon mode at the [111] zone boundary. The over-all characteristics of the
Γ25 mode are similar to those that have been observed for this same mode in SrTiO
3 near its 110°K phase transition. We also observe that the
M3 mode at the [110] zone boundary has the very low energy of 3.1±0.2 MeV at room temperature, and condenses not at 184°K but rather in the vicinity of its Néel temperature, 88°K. The X-ray studies by Beckman and Knox indicate that the space group of KMnF
3 below 184°K is the orthorhombic
PbnmD(
2h16). This orthorhombic phase is consistent with our observation that the
Γ25 mode is responsible for the 184°K transition in that the dominant contribution to the rotation of the fluorine octahedra is a superposition of two of the three triply degenerate modes of
Γ25 condensing at the transition temperature.
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N. Malathi, S. P. Puri, I. P. Saraswat
1969 Volume 26 Issue 3 Pages
680-683
Published: March 05, 1969
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Three-layer type iron bearing clay minerals, Illite and Montmorillonite, have been analyzed by Mössbauer effect with a view to find the oxidation state, coordination symmetry and site distortion of the iron ion. Furthermore, these samples were treated with concentrated solutions of Fe(NO
3)
3, pH 0.1 to study the exchange of cations. It is concluded that in the natural samples of Montmorillonite and Illite, Fe
3+ ion is in the alumina octahedra in place of Al
3+ ion. In the case of Montmorillonite, treated with ferric nitrate solution, the iron ion is taken up in three inequivalent sites of cubic symmetry: into the vacant sites of Si tetrahedra as [FeO
4]
−−, in the basal plane and on the broken edges. In the case of Illite, the main exchange location for Fe
3+ is the broken edge and only a small amount goes into the basal plane.
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Masaru Tsukada
1969 Volume 26 Issue 3 Pages
684-696
Published: March 05, 1969
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A new method to obtain the Green’s function of a mixed crystal is studied in the tight binding approximation. The crystal is devided into cells and the Green’s function in a cell is obtained for each atomic arrangement in it. In that process the effects of the other cells are approximated by their average which is determined self-consistently.
The numerical results are obtained for the one dimensional model. The peaks due to the localized levels of the clusters appear in the state density curve for the smaller concentrations. They coalesce with the increase of the concentration and the overall structure nears to that of a virtual lattice, if the atomic energy difference is small. It is found that the virtual crystal model holds well in the middle of the band. The optical absorption curve is calculated in this model.
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Shin-ichi Katsuki
1969 Volume 26 Issue 3 Pages
696-700
Published: March 05, 1969
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The deformation potentials in bismuth for electrons and holes are calculated by means of a pseudopotential approach in the framework of the first-order perturbation theory. The model potential of Abarenkov, Animalu and Heine is used as the pseudopotential. The values calculated in this scheme are compared with those estimated by Inoue and Tsuji on the basis of experimental results of the magnetoacoustic attenuation by Mase
et al. and those determined by Walther. A good agreement is obtained. The change in overlap energy between conduction and valence bands in the presence of unit strain is also calculated. An agreement with experimental results by Jain and Jaggi is also good.
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Hisao Miyazawa
1969 Volume 26 Issue 3 Pages
700-709
Published: March 05, 1969
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Precise hot electron temperature
Te was determined against electric field
E for two
n-InSb samples, of which exhaustion carrier concentration
no is 1×10
14 and 4×10
14 cm
−3 respectively, provided that lattice temperature
TL was at 4.2°K or below 2°K, and a transverse magnetic field
B from 0 to 11.2 kG was applied.
Te(
E) was obtained by comparing resistivity and Hall coefficient at high
E with those at ohmic
E but at high
TL. The results revealed (1) effects of various parameters (
B,
no,
TL) on
Te(
E), (2) a bend of
Te at 18°K irrespective of
B,
no and
TL, (3) slow rise of
Te above 18°K, resulting in
Te∞
E2⁄7 if
B=0, (4) termination of reasonable
Te at 30°K and predominance of electron-electron scattering below 30°K. Inferences are given in terms of the two-band model.
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Koshichi Noto
1969 Volume 26 Issue 3 Pages
710-716
Published: March 05, 1969
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The thermal conductivity,
K, of a pure Nb (RRR=1900) has been studied as a function of longitudinal and transverse magnetic field between 1.8°K and the transition temperature (9.2°K). The thermal conductivity shows a deep minimum just above
Hc1 and increases with infinite slope in the gapless region near
Hc2 like
ΔK⁄
Kn=
C(
Hc2−
H)
1⁄2 in good agreement with the Maki theory for both longitudinal and transverse field configurations. The temperature dependence of the coefficient
C is compared with numerically calculated one from the revised Maki theory which includes both the impurity scattering and the phonon scattering, and a fairly good agreement is found between them, when density of states is assumed to be 1.6×10
33 states/cm
3 erg.
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Gen Soda, Takehiko Chiba
1969 Volume 26 Issue 3 Pages
717-722
Published: March 05, 1969
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Deuteron magnetic resonance study is made of single crystals of LiD
3(SeO
3)
2 between −143°C and 110°C. The electric quadrupole coupling constant,
eQq⁄
h, the asymmetry parameter, η, and the directions of the principal axes of the field-gradient tensor are determined for each deuteron at room temperature. Three non-equivalent tensors are obtained corresponding to the three non-equivalent fairly strong hydrogen bonds determined by X-ray diffraction. The
eQq⁄
h and η are 107.8 kc/sec and 0.172 for D
a, 127.9 kc/sec and 0.154 for D
b, and 181.1 kc/sec and 0.101 for D
c, The hydrogen-bond network in LiD
3(SeO
3)
2 is determined. The atomic coordinates of deuterons are estimated from the results of the present DMR study. The field-gradient tensor of
7Li is also determined at room temperature. The values of
eQq⁄
h and η are 33.9 kc/sec and 0.593.
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Gen Soda, Takehiko Chiba
1969 Volume 26 Issue 3 Pages
723-732
Published: March 05, 1969
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Deuteron and
23Na magnetic resonances are measured of single crystals of NaD
3(SeO
3)
2 between 134°K and 298°K to reveal the nature of the ferroelectric transition (
Tc∼267°K). Deuteron resonance lines
Da and
Db (relative intensity 1:2) above
Tc split into two and into four, respectively. The
23Na resonance line above
Tc also splits into two below
Tc. Following conclusions are derived from measurements of temperature and angular dependences of the quadrupole splittings for these deuteron and
23Na resonance lines. All the hydrogen atoms are linked with moderately strong hydrogen bonds, and are jumping back and forth in the double well potential above
Tc. The phase transition is accompanied not only by order-disordering of hydrogen atoms in hydrogen bonds, but also by slight rotations of SeO
3−− ions and by a slight distortion of lattice in the neighborhood of Na
+ ions. The crystalline symmetry below
Tc is monoclinic, and the cell-doubling occurs along the
b axis. Hydrogen-bond network below
Tc is estimated from the present study. This structure has permanent polarization in the
ac plane.
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Hideo Kayano
1969 Volume 26 Issue 3 Pages
733-737
Published: March 05, 1969
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The ultrasonic attenuation in zinc single crystals were studied in the temperature range from 4.2°K to 300°K. In pure zinc specimen, three peaks were observed in the attenuation, temperature curves. The peaks were named P
1, P
2 and P
3 in the order from lower to higher temperature. P
1, P
2 and P
3 were observed in the attenuation of the longitudinal wave along the direction 43.25° to c-axis and the shear wave parallel to the basal plane. On the other hand, only P
3 was observed in the attenuation of the longitudinal waves travelling perpendicular to the basal plane. The relaxation processes appearing in the form of P
1, P
2 and P
3 peaks were interpreted to be associated with the dislocation movement in the basal plane, prismatic plane and pyramidal plane, respectively. A theory of relaxation process in terms of formation of a pair of kinks is proposed.
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Tetsuhiko Tomiki
1969 Volume 26 Issue 3 Pages
738-758
Published: March 05, 1969
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The spectra of conductivity σ(
E) and of energy loss Im {ε(
E)
−1} of KCl single crystals are studied as functions of temperature of the ranged of 10°K to 573°K in the intrinsic region to 12 eV. It is shown that σ(
E)-spectra in the chlorine doublet region can be decomposed in the whole range of temperature into the two components of asymmetric Lorentzian from with positive degree of asymmetries. This allows the study of the temperature dependences of those quantities which are characteristic of an asymmetric Lorentzian function, and the derivation of the mean energy values of various kinds of phonons effective to each of the above quantities, thus leading to an increasing recognition of an importance of exciton-phonon interaction in the process of photon absorption. The oscillator strength of chlorine doublet is estimated as a whole as 0.56±0.09. The oscillator strength of the higher energy component of this doublet is found to increase linearly with increase in temperature accompanying the compensating decrease in the oscillator strength of the lower energy component, indicating the interband interaction. A tentative interpretation is given on the spectrum in the region up to 13.4 eV.
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Motoo Tsukakoshi, Koichi Shimoda
1969 Volume 26 Issue 3 Pages
758-769
Published: March 05, 1969
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Intensity change of spontaneous emission from the lower laser level induced by a linearly polarized laser transition has been studied as a function of magnetic field. By using a zero-field interference effect between magnetic sublevels, the decay times of the upper and lower laser levels can be measured. The intensity change of spontaneous emission has been investigated experimentally in a 3.51 μm (5
d33→6
p22) and a 5.57 μm (5
d34→6
p23) xenon laser as a function of polarization directions of the laser radiation and the spontaneous emission, the parameters being the gas pressure and the discharge current. The observed intensity change has two overlapping components of different widths, their ratio being about 1:20. It is found that the narrow component is caused by fourth-order perturbation of the laser field, the coherence among sublevels of the upper laser state being transferred to the lower state.
The observed decay time of the lower laser level is 3.5×10
−8s for the 6
p22 level and 2.5×10
−8s for the 6
p23 state at a pressure of 13 mTorr. The observed decay time of the upper level is very sensitive to the discharge conditions and takes a value of (3∼8)×10
−7s for the 5
d34 level.
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Hiroji Ohigashi, Yukio Kurita
1969 Volume 26 Issue 3 Pages
769-772
Published: March 05, 1969
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The Cl
2− centers trapped in X-irradiated single crystals of hydroxylammonium chloride have been studied by electron spin resonance technique in the temperature range from 77°K to 150°K. Two crystallographically inequivallent Cl
2− centers designated as V
k(I) and V
k(II) are produced in the crystal. The former is composed of a chlorine ion pair situated on the
bc plane and the latter is formed from a pair on the plane nearly perpendicular to the
bc plane. Thermal conversion from V
k(I) into V
k(II) takes place thermally above 105°K and V
k(II) is converted into V
k(I) by irradiation with the V
k light at 77°K.
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Masatake Mori
1969 Volume 26 Issue 3 Pages
773-776
Published: March 05, 1969
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A method for calculation of the ionization cross-section of an atom by de-excitation of another metastable atom through collision (Penning ionization cross-section) is proposed. The perturbed stationary state method is applied and Jeffreys’ approximation is used of the determination of the phase shift. Fano’s formula is applied to the coupling between the discrete state and the continuum and a parameter β is introduced by which the wave function is made to satisfy the initial condition. The method is applied to a long-range interaction
V=−
Cn⁄
Rn. The velocity dependence obtained is the same as that of the previous work. The cross-section in the case of
n=3 is about half the value obtained by the impact parameter method.
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Eiichi Fukada, Kiyoshi Hara
1969 Volume 26 Issue 3 Pages
777-780
Published: March 05, 1969
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Piezoelectric effect has been observed in various kinds of tissues such as trachea, intestines, ligament, aorta and vena. The anisotropy of piezoelectric modulus indicates the preferred orientation of piezoelectric protein fibers including collagen and elastin. The value of piezoelectric modulus in completely dried state is from 10
−10 to 10
−9c.g.s.e.s.u.. Temperature variation of the piezoelectric modulus is influenced by the thermal motion of molecules and the moisture absorbed in the specimen. It is estimated that 1 precent oblique cyclic deformation of blood vessel walls at a frequency of about 1 c/s could produce the alternating electric current of approximately 3 pico ampere between the surfaces of the vessel wall.
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Taro Sometani, Kenzo Yamamoto
1969 Volume 26 Issue 3 Pages
781-784
Published: March 05, 1969
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A variational problem with respect to a functional comprising two argument functions is solved. In this problem, the configuration of the periodic quadrupole min \bar
B field is optimized in a sense when the ratio of the maximum to the minimum distance of a line of force from the axis of a cylindrical geometry is kept within a limit. The two stationary functions concerned have a singular point respectively and minimize the functional only in that left side region of the singular point in which the integrand of the functional is positive.
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Tatsumi Hiramoto
1969 Volume 26 Issue 3 Pages
785-801
Published: March 05, 1969
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Radiative losses are calculated for some combinations of an infinite slab, infinite cylindrical, finite cylindrical, or spherical enclosure of plasma and a constant, linear, parabolic, trigonometric, or periodic distribution of Planck’s function caused by non-uniformity in electron temperature. The local loss rate on an axis or a center becomes higher as non-uniformity in Planck’s function increases. The rate increases with the increasing distance from the axis or the center in the case of constant Planck’s function. On the contrary, for symmetric functions with monotonic decrease, it becomes lower with the increasing distance and negative in the region near enclosure surfaces.
The results obtained here are available for the estimation of radiative energy loss from nonequilibrium plasmas in magnetohydrodynamic devices. Especially, the result for periodic distribution of Planck’s functions is useful for an analysis of plasmas with fluctuations in electron temperature such as ionization instabilities.
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Kazuo Kitao
1969 Volume 26 Issue 3 Pages
802-807
Published: March 05, 1969
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The effect of magnetic curvature on density gradient drift instabilities is examined for a collisionless plasma in which β stratifies
m⁄
M<β<<1, where β=plasma pressure/magnetic pressure,
m and
M are the electron and ion masses respectively. For simplicity, the effect of magnetic curvature is simulated by an equivalent gravitational field. The present considerations are restricted to the cases where the wavelength of perturbations is much longer than the mean ion Larmor radius and the radius of magnetic curvature is much larger than the characteristic length of the density gradient. It is found that the slow Alfvén mode which is unstable in a straight and parallel magnetic field stabilized by magnetic curvature with a sign favorable to stabilization of the interchange instability while it remains unstable by unfavorable curvature, and that the fast Alfvén mode remains stable independently of the sign of magnetic curvature.
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Takasi Kurasawa
1969 Volume 26 Issue 3 Pages
807-816
Published: March 05, 1969
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Using the Hamiltonian formalism, kinetic equations describing four-wave interactions among the electron waves and among the electron waves and the ion waves are obtained.
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Masatada Ogasawara, Sigehiko Mori
1969 Volume 26 Issue 3 Pages
816-820
Published: March 05, 1969
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Theoretical investigations are made of the effects of a stationary magnetic field on sum and difference frequency generation due to two nonuniform rf electric fields applied externally to a plasma. Macroscopic equation of motion without collision term is used as a basic equation.
The magnetic field gives rise to sum and difference frequency components in electron velocity, even when the two nonuniform rf electric fields are perpendicular to each other. Cyclotron resonance in the electron velocity at sum and difference frequency is caused by a perpendicular gradient of the electric fields with respect to the direction of the stationary magnetic field.
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Masatada Ogasawara
1969 Volume 26 Issue 3 Pages
820-826
Published: March 05, 1969
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With use of the Boltzmann equation, dispersion relations are derived for electron mode by taking account of momentum transfer, electron-ion temperature relaxation and relaxation of anisotropy in temperature. Ions are regarded to be a heat bath of infinitely large capacity. The dispersion relations are given in the forms of wavenumber expansion.
The momentum transfer collision gives damping of waves. The relaxation of anisotropy in temperature also causes damping. The electron-ion temperature relaxation gives additional damping only for longitudinal wave, but not for transverse one. An explanation of this is given.
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S. R. Majumdar
1969 Volume 26 Issue 3 Pages
827-840
Published: March 05, 1969
Released on J-STAGE: June 01, 2007
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By using bispherical coordinates, the non-axisymmetrical Stokes flow of an incompressible, homogeneous viscous liquid in space between two eccentric spheres, has been solved. Two different cases have been considered, namely (a) when the spheres are external to each other, and (b) when one sphere encloses the other. In the second case it has been assumed that the inner sphere rotates with uniform angular velocity about an axis perpendicular to the line of centers and the outer sphere is fixed. A method has been developed which reduces the hydrodynamical problem to the solution of two infinite sets of linear algebraic equations for two coefficient sequences, which may be solved numerically to any degree of accuracy. It has been proved that the resultant force acting upon the spheres is at right angles to the axis of rotation and the line of centers. The effect of the stationary sphere on the force and couple exerted by the liquid on the rotating sphere has been discussed and the results are compared with those of the axisymmetrical case of G.B. Jeffery. The limiting case of a sphere and a plane is given in Appendix II.
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Takeo Sakurai
1969 Volume 26 Issue 3 Pages
840-848
Published: March 05, 1969
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A response of viscous heat-conducting compressible fluid to an abrupt change of angular velocity of a containing circular cylinder under the existence of stable distribution of the temperature is investigated within the frame work of Boussinesq approximation for the time duration of the order of the incompressible spin down time. The coexistence of a horizontal intermediate adjusting layer together with the Ekman layer is clarified as a characteristic feature of unsteady motion. The asymptotic amount of the total angular momentum transferred to the main bulk of the fluid is investigated in detail, and it is shown that the spin down phenomenon similar to that in the incompressible fluid does occur even for cases which are classified as compressibility dominant according to the behavior of steady motion.
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Hirokane Kawakami, Kazuo Hisatake
1969 Volume 26 Issue 3 Pages
849
Published: March 05, 1969
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J. Sanada, M. Yamanouchi, N. Sakai, S. Seki
1969 Volume 26 Issue 3 Pages
850
Published: March 05, 1969
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Yoshihisa Wakuta, Masateru Sonoda, Akira Katase, Hiroyuki Tawara, Miki ...
1969 Volume 26 Issue 3 Pages
851
Published: March 05, 1969
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Kouya Ogino, Kazuhiko Maeda
1969 Volume 26 Issue 3 Pages
852
Published: March 05, 1969
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J. Sanada, Y. C. Liu, Y. Sugiyama, O. Mikoshiba
1969 Volume 26 Issue 3 Pages
853
Published: March 05, 1969
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Masayoshi Ohashi, Tomiei Hori, Yasuaki Nakagawa
1969 Volume 26 Issue 3 Pages
854
Published: March 05, 1969
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Kiyoo Sato, Kengo Adachi, Eiichi Ando
1969 Volume 26 Issue 3 Pages
855
Published: March 05, 1969
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Kiiti Siratori, Masayoshi Ohashi
1969 Volume 26 Issue 3 Pages
856
Published: March 05, 1969
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Naokatsu Sano, Junkichi Itoh, Shun-ichi Kobayashi
1969 Volume 26 Issue 3 Pages
857
Published: March 05, 1969
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M. Tachiki
1969 Volume 26 Issue 3 Pages
858
Published: March 05, 1969
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Hiroshi Morinaga, Osamu Sueoka, Kunio Fujiwara
1969 Volume 26 Issue 3 Pages
859
Published: March 05, 1969
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Kazuo Yoshihiro, Wataru Sasaki
1969 Volume 26 Issue 3 Pages
860
Published: March 05, 1969
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Y. Sato, A. Joshi, J. M. Sivertsen, L. E. Toth
1969 Volume 26 Issue 3 Pages
861
Published: March 05, 1969
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Kazunari Ohshima, Tetsuo Fujita, Nobuhiko Wada, Hide Yoshioka, Ryozi U ...
1969 Volume 26 Issue 3 Pages
862
Published: March 05, 1969
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Osamu Sueoka
1969 Volume 26 Issue 3 Pages
863
Published: March 05, 1969
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Osamu Sueoka
1969 Volume 26 Issue 3 Pages
864
Published: March 05, 1969
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