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Susumu Okubo
1964 年 19 巻 9 号 p.
1507-1511
発行日: 1964/09/05
公開日: 2007/06/01
ジャーナル
認証あり
Higher Order Effects due to both the electromagnetic and the SU(3)-violating interactions have been investigated for masses of particles belonging to the octet and decouplet representations of the unitary symmetry.
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Hirotaka Sugawara
1964 年 19 巻 9 号 p.
1511-1513
発行日: 1964/09/05
公開日: 2007/06/01
ジャーナル
認証あり
Relations among the masses of the
SU3 multiplets are derived assuming the existence of the ‘quarks’ of M. Gell-Mann.
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Gentaro Araki
1964 年 19 巻 9 号 p.
1514-1517
発行日: 1964/09/05
公開日: 2007/06/01
ジャーナル
認証あり
An elementary account is given on one-nucleon states and levels in an alternative interpretation of the nuclear shell model in which a
σ·x term is assumed in the one-nucleon Hamiltonian instead of an
L·
S term. It is shown in an elementary way that the Hamiltonian gives an inverted doublet system of energy levels and nuclear magnetic moments of values between the Schmidt lines.
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Yasushi Wada
1964 年 19 巻 9 号 p.
1518-1528
発行日: 1964/09/05
公開日: 2007/06/01
ジャーナル
認証あり
A formalism of the theory of nuclear reactions is presented. The transition matrices are given as matrix elements between the initial state of the target nucleus and the final state of the residual nucleus. It can be calculated by solving a many body problem of the total system during the collision processes, which is formulated in a form similar to the nuclear structure problem. The effects of the identity of nucleons are completely taken into account. The amplitudes of elastic and inelastic neutron scattering are formally derived. The selfconsistent conditions for the optical potential are obtained and examined in the lower order approximations with respect to the residual interactions between the nucleons. The effects of the singular interactions between the nucleons can be taken into account. The applicability of this formalism to other reactions is pointed out.
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Jun-Ichi Fujita
1964 年 19 巻 9 号 p.
1528-1532
発行日: 1964/09/05
公開日: 2007/06/01
ジャーナル
認証あり
In this short note an attempt is made to reformulate the nuclear many-body problem in the perturbation-like forms. Several possible ways of improving the existing models are suggested.
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Takehiko Ishidzu, Hideo Kawarada
1964 年 19 巻 9 号 p.
1533-1538
発行日: 1964/09/05
公開日: 2007/06/01
ジャーナル
認証あり
Compressible oscillations of heavy nuclei are treated by means of the hydrodynamical method with aid of the statistical model. The oscillations are assumed to be small perturbations to the statical equilibrium of the nucleus with constant density. Two kinds of the energy expressions are applied: the purely statistical one due to the Thomas-Fermi-Dirac method for some attractive central Yukawa potentials and the one due to the
K-matrix method for nuclear matter with the Gammel-Thaler potential. From the lowest eigenfrequencies of the oscillations obtained corresponding quantum-mechanical excitation energies are calculated, and those for the mode
l=1 are shown to be comparable with the giant resonance energies in photo-nuclear reactions of heavy nuclei.
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Kiyoshi Murakawa
1964 年 19 巻 9 号 p.
1539-1541
発行日: 1964/09/05
公開日: 2007/06/01
ジャーナル
認証あり
The hyperfine structure of the level 5
s5
p5 3P2 was studied, and the quadrupole moment
Q′(I
137) withont shielding correction was deduced to be −0.49±0.08 barn, whereas the value of
Q′ deduced from 5
p5 2P3⁄2 and 6
s4P5⁄2 and 7
p4D7⁄2 of I I is −0.66 barn, the most probable value of
Q being −0.62 barn. This discrepancy seems to show that the shielding correction for the configuration 5
s5
p5 of I II is positive. The interval factor of the level 5
s5
p5 1P1 was found to be too large to give proper interpretation.
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Tachishige Hirose, Kazuo Hisatake
1964 年 19 巻 9 号 p.
1542-1549
発行日: 1964/09/05
公開日: 2007/06/01
ジャーナル
認証あり
The decay of Ba
131 was studied with a magnetic beta spectrometer and Nal scintillation spectrometers. Twenty-two transitions in Cs
131 were observed in the internal conversion spectrum. A new level in Cs
131 was found at 594 keV. The gamma-gamma angular correlation for the 924-124 keV cascade in Cs
131 was observed to be W(θ)=1+(0.0012±0.016)
P2(cosθ)+(0.011±0.029)
P4(cosθ). The spins and parities of excited states of Cs
131 are assigned from the multipolarities which were determined by the internal conversion and the angular correlation. The observed energy levels (in keV) and the spins and parities in Cs
131 are 77(7/2
+, 3/2
+, 5/2
+), 124(3/2
+, 1/2
+, 5/2
+), 133(3/2
+, 7/2
+, 5/2
+), 216(3/2
+), 374(3/2
+), 594(?), 620(1/2
+, 3/2
+), 700(?), 1051 keV (3/2
+, (1/2
+)).
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Morikazu Toda
1964 年 19 巻 9 号 p.
1550-1554
発行日: 1964/09/05
公開日: 2007/06/01
ジャーナル
認証あり
Thermodynamical consideration on the equation of state is combined with kinematical consideration on the two-body distribution function. Thus, general relations between the equation of state and the distribution function are obtained without using statistical mechanics, and the fact that spacial correlation between molecules is responsible for the pressure equation is emphasized. The results are applied to classical systems and to quantum mechanical gases, and proved by statistical mechanics.
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Yutaka Kano
1964 年 19 巻 9 号 p.
1555-1560
発行日: 1964/09/05
公開日: 2007/06/01
ジャーナル
認証あり
Statistical properties of blackbody radiation are discussed by the techniques of second quantization. Various probability distribution functions are derived, in particular the Bose-Einstein distribution function and its generalization for an arbitrary number of momentum-spin states. The Sudarshan phase space distribution function for blackbody radiation is obtained. Although in general the Sudarshan distribution function appears to be a generalized function, it is found that for the radiation field considered here, it becomes an ordinary function and is in agreement with expressions derived recently somewhat heuristically by other authors. A certain new probability distribution function for a statistcal radiation field is introduced and is expressed in terms of the eigenvalues of the annihilation operator. Unlike the phase space distribution function of Sudarshan, this function is non-negative. Finally an expression is derived for this probability distribution function appropriate to blackbody radiation.
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E. de Lamotte, C. Wert
1964 年 19 巻 9 号 p.
1560-1564
発行日: 1964/09/05
公開日: 2007/06/01
ジャーナル
認証あり
Internal friction peaks in Ta and Nb which arise after these metals have undergone cold-work are observed at temperatures between 200°C and 300°C for a frequency of 1 cps. Numerous similarities of the peak in Ta to one reported by Schoeck and Mondino are observed, but some differences are also observed. The peaks in both metals anneal away rapidly at their maxima, making quantitative measurement of their properties difficult. These peaks may be caused by an oxygen-dislocation interaction, as was suggested by Schoeck and Mondino, but several differences between these peaks and other cold-work peaks make this assignment not certain.
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Kiiti Siratori, Kay Kohn
1964 年 19 巻 9 号 p.
1565-1572
発行日: 1964/09/05
公開日: 2007/06/01
ジャーナル
認証あり
The magnetic resonance of a coupled spin system is considered phenomenologically. The magnetic resonance modes can be directly determined from the irreducible representations of the space group to which the system belongs. Then, approximate calculation of the frequency and intensity of resonance lines can be made. This approach is convenient especially in the case of complicated spin structures. As examples, cases of conical and sinusoidal structures are treated, and the resonance frequencies in MnCr
2O
4 are estimated.
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Hiroshi Iwasaki
1964 年 19 巻 9 号 p.
1572-1578
発行日: 1964/09/05
公開日: 2007/06/01
ジャーナル
認証あり
A model for the anti-phase domain structure of CuAu
3 is proposed which can account well for the particular feature of the superlattice reflections observed by Hirabayashi in his single crystal X-ray diffraction pattern. In this model, the imperfectly ordered lattice consists of anti-phase domains with the shape of dodecahedron. Domain boundaries are {110} planes, across which direct contact between like atoms takes place more frequently than inside domains. The shape and size of domains may considerably be irregular in the actual lattice.
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Kenji Sekido, Masakazu Fukai, Hajimu Kawamura
1964 年 19 巻 9 号 p.
1579-1586
発行日: 1964/09/05
公開日: 2007/06/01
ジャーナル
認証あり
The broadening of cyclotron resonance line due to ionized impurity scattering has been measured in a germanium crystal containing both antimony and copper of about 10
14cm
−3 in a 50 Gc-band experiment at 11°K. Use of a heavily compensated specimen together with an attenuated carrier-producing illumination has made possible to observe the broadening effect which has not been in the experiments ever performed. By analyzing the increment of half-width, the relaxation time for ionized impurity scattering has been evaluated, which is in approximate agreement with the value from the Conwell-Weisskopf formula. The result may be reasonably accepted, since, in the present experimental condition, the mean cyclotron radius is comparable with or larger than the magnitude of the force range of the scattering potential.
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Ichiroh Nakada, Kozo Ariga, Ayahiko Ichimiya
1964 年 19 巻 9 号 p.
1587-1591
発行日: 1964/09/05
公開日: 2007/06/01
ジャーナル
認証あり
In order to determine the energy gap of anthrancenc, the temperature change of the electrical conduction in its intrinsic region was measured by DC method for single crystals. For silver paste electrodes, a considerable polarization effect appeared after the application of the electric field. By the extrapolation of the decaying current to the time when the field was applied, the initial current which satisfied the ohmic relation was obtained. From this current the conductivity was determind. In the temperature range above 120°C the intrinsic region with activation energy of 2.8±0.2 eV and σ
0 of 1×10
3∼1×10
4Ω
−1 cm
−1 was obtained. At the lower temperature range, the activation energy of 0.4∼0.5 eV was observed. The region with the lower activation energy seems to the extrinsic one.
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Kiyoo Sato, Motohiko Yamada, Tokutaro Hirone
1964 年 19 巻 9 号 p.
1592-1595
発行日: 1964/09/05
公開日: 2007/06/01
ジャーナル
認証あり
Magnetization curves in the base plane and along the c-axis of natural pyrrhotite crystals (Fe
7S
8) are measured up to a magnetic field strength of 90 kOe. The results can be expressed in terms of the magnetocrystalline anisotropy energy,
Ek=−
K0|cosθ|+
K3cos
2θ+
K4cos
4θ, the last term being the correction term for the preceding one. The values of
K0,
K3 and
K4 obtained are
K0=0.51×10
6 erg/cc,
K3=3.2×10
6 erg/cc and
K4=0.098×10
6 erg/cc at 293°K and
K0=1.2×10
6 erg/cc
K3=4.2×10
6 erg/cc and
K4=0.21×10
6 erg/cc at 77°K. These values obtained are discussed on the basis of Adachi’s theory of magnetocrystalline anisotropy.
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Eijiro Haga, Hatsuo Kimura
1964 年 19 巻 9 号 p.
1596-1606
発行日: 1964/09/05
公開日: 2007/06/01
ジャーナル
認証あり
The infrared absorption bands observed in 1∼5 μ are theoretically investigated under the assumption that the absorption is due to the transition of electrons between two conduction bands which have the minima being located at different points in the zone. With use of the second order perturbation in the presence of photons and crystal imperfections, the theoretical curves give different shapes according as the possible intermediate states are the
D- or
I-type. The first has a sharp peak in the absorption band, while the latter forms a broad band.
For AlSb and GaSb, the observed shapes of the absorption bands agree reasonably with the calculated ones for the
D-
type. The carrier concentration dependence of the absorption coefficient in AlSb can also be explained fairly well. For GaAs, the absorption band calculated for the
I-
type agrees well with the experimental one at the points of the shape, the carrier concentration dependence and the temperature dependence. Also, the gap energy between two minima on the conduction bands is obtained as 0.44 eV for GaAs. It is concluded that the bands observed in GaAs and GaSb are due to the inter-conduction band transition.
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Masaki Shinada
1964 年 19 巻 9 号 p.
1607-1623
発行日: 1964/09/05
公開日: 2007/06/01
ジャーナル
認証あり
Optical rotatory dispersion of dihedral metal complexes with (3d)
n (
n=1, ··· 9, except for
n=5) is studied by means of purely ionic model. Rotational strengths of the first absorption bands are given by considering the second-order asymmetric distortion of the octahedral
d-orbitals due to chelation. Taking into account the splitting of the band, dispersion curve is obtained and compared with experiments. Qualitative agreement is obtained for [Crox
3]. A physical model is introduced in order to discuss the relation between the geometrical structure and the sign of the optical rotation. With this model, it is shown that for [Coen
3], twisting of the ethylenediamine molecules seems to be responsible to the rotatory dispersion. Finally, it is emphasized that molecular orbital treatment is necessary for further quantitative discussions.
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Michio Kiritani, Yoshiharu Shimomura, Sho Yoshida
1964 年 19 巻 9 号 p.
1624-1631
発行日: 1964/09/05
公開日: 2007/06/01
ジャーナル
認証あり
The shape of voids which are formed in quenched and aged aluminum is determined experimentally. Quenched specimens containing voids large enough to be resolved by the electron microscope, larger than 50Å, can be produced by controlling quenching conditions. All images observed from various crystallographic directions are exactly those expected from a regular octahedral void surrounded by {111} planes. The image caused by the strain field of voids are also observed.
It is found from the measured void size and density that, under certain experimental conditions, almost all quenched-in vacancies aggregate to form voids without forming dislocation loops or disappearing to preexisting sinks.
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Hatsuo Kimura, Masao Shimizu
1964 年 19 巻 9 号 p.
1632-1637
発行日: 1964/09/05
公開日: 2007/06/01
ジャーナル
認証あり
The thermoelectric powers of Pd-Ag and Pd-Rh alloys, in their Pd-rich side, are calculated using the Mott model for s-d scattering, and the density of electronic states which has been determined from the low temperature specific heat data of these alloys. It is shown that the calculated results, in which only current carriers are assumed to be s-electrons, agree qualitatively with experiment at room temperatures but do not at low temperatures. The role of d-holes in the ordinary thermoelectric power of these alloys are discussed at room temperatures. It is shown that by assuming that the phonon drag effect plays a part in the thermoelectric power of Pd at low temperatures, all experimental features of these alloys can be understood consistently as a function of composition and temperature.
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Takako Shinoda, Hideaki Chihara, Syûzô Seki
1964 年 19 巻 9 号 p.
1637-1648
発行日: 1964/09/05
公開日: 2007/06/01
ジャーナル
認証あり
A small adiabatic calorimeter is described, which is capable of measuring the solid heat capacities between 5° and 300°K continuously.
The heat capacities of CoCl
2·2H
2O were measured between 7° and 120°K. A lambda-shaped anomaly in the heat capacity, due apparently to a transition between antiferromagnetic and paramagnetic states, occurs below 20°K with the peak at 17.20°K. An analysis of the experimental heat capacity curve was made in the light of the series expansion method through help of the experimental heat capacities of CoCl
2·6H
2O at the low temperatures in a semi-empirical way. This result gives the exchange interactions |
J|⁄
k=10.8°K in the direction of the chain of the coordinated Co
2+ ions and |
J’|⁄
k=2.03°K between Co
2+ ions in the neighboring chains.
The total entropy of the transition is 1.39 cal/deg mole and about 37% of this is acquired in the temperature region above 17.20°K.
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K\={o} Yasuk\={o}chi, Takeshi Ogasawara, Nobumitsu Usui, Shintaro Ushi ...
1964 年 19 巻 9 号 p.
1649-1661
発行日: 1964/09/05
公開日: 2007/06/01
ジャーナル
認証あり
The magnetic behaviors of superconducting Nb-Zr (25%) wire have been studied at 4.2°K. The magnetization curve exhibits an irreversible behavior. In transverse fields the magnetization is reduced due to the transport current, but in longitudinal fields the influence of the transport current is not recognized. The results are explained by a phenomenological model for inhomogeneous type II superconductors. The model, based on Ginzburg-Landau-Abrikosov-Gor’kov (GLAG) theory, was proposed by Silcox and Rollins and extended by the authors to consider a pinning effect of imperfections on fluxoids. The calculated magnetization curve is in good agreement with the experimental values. The influence of the transport current is qualitatively explained by introducing the Lorentz force on fluxoids due to current into the theory. The dependence of critical current density of a short wire sample on an applied field is also calculated and compared with the experimental values.
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J. F. Dillon
1964 年 19 巻 9 号 p.
1662-1665
発行日: 1964/09/05
公開日: 2007/05/29
ジャーナル
認証あり
Tsubokawa reported CrBr
3 to be ferromagnetic. Bizette and Terrier reported it to be antiferromagnetic. Tsubokawa reported an anisotropy constant about half that given by Dillon. These contradictions can be resolved by an examination of published data. CrBr
3 is a ferromagnet. Its anisotropy constant is close to −9.3×10
5 ergs/cm
3 at liquid helium temperatures.
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Toshiyuki Fujishiro, Fumihiko Takano, Takehiko Oguchi
1964 年 19 巻 9 号 p.
1666-1677
発行日: 1964/09/05
公開日: 2007/06/01
ジャーナル
認証あり
The method of the constant coupling approximation is applied to investigate the effect of the second nearest neighbor interactions. Ferromagnetic, antiferromagnetic, and screw spin arrangements are discussed as functions of a ratio of the magnitude of the nearest neighbor and the second nearest neighbor interactions. The critical value where the spin arrangement changes is obtained for the antiferromagnetic body centered cubic lattice. The condition for screw arrangement of spins to occur in rutile type structure is same as that in the simple molecular field approximation but the transition temperature is different due to the short range order effect.
We further improve the constant coupling approximation by taking account of three spin or four spin system. One of the important results is two-dimensional triangular lattice cannot be ferromagnetic, on the contrary to the results obtained by the constant coupling approximation.
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Kazuyoshi Hirakawa
1964 年 19 巻 9 号 p.
1678-1685
発行日: 1964/09/05
公開日: 2007/06/01
ジャーナル
認証あり
The hyperfine interactions in KCoF
3 have been studied by measurements of the nuclear magnetic resonance shifts of the F
19 nucleus in the single crystal specimen. The measurements were performed at room temperature and the frequency used was 34.826 Mc/s. The external magnetic field was rotated in the (001) plane, and both isotropic and anisotropic shifts were observed. The isotropic hyperfine constant
As and the anisotropic one
Aσ–
Aπ were calculated using the resonance formula for F
19 nucleus
hν=
gNβ
N(
H0+
HD)–[
As+(
Aσ–
Aπ)(3cos
2θ
i−1)]·2〈
Sz〉,
in which the first is the Zeeman term and the second is the hyperfine interaction term. The spin expectation value for Co
2+ 〈
Sz〉 was calculated from our early experimental values of susceptibility using Kanamori’s theory for CoO. The obtained
As and
Aσ–
Aπ are (2.73±0.06)×10
−3 cm
−1 and (8.2±0.4)×10
−4 cm
−1 respectively. From these we can calculate the fractions of unpaired spins in the 2
s and 2
p orbitals of F
− to be,
fs=(0.55±0.01)% and
fσ–
fπ=(5.7±0.3)%. The effects caused by the unusual electronic characteristics of 3d orbitals of Co
2+ are briefly discussed.
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Yasutaka Suemune, Hy\={o} Ikawa
1964 年 19 巻 9 号 p.
1686-1690
発行日: 1964/09/05
公開日: 2007/05/29
ジャーナル
認証あり
The thermal conductivity of single crystals of KMnF
3, KCoF
3, KNiF
3, and KZnF
3 has been measured in the temperature range of 15° to 300°K by the absolute longitudinal heat-flow method. These compounds have the same crystal structure of the perovskite type and are antiferromagnetic except for diamagnetic KZnF
3. The anomalous decreases are shown in the temperature dependence of the thermal conductivity for the magnetic crystals of KMnF
3 and KCoF
3 at their Néel temperatures of 88° and 114°K respectively, but KNiF
3 has no anomaly at its Néel temperature of 275°K. These anomalies are seemed to be due to the phonon-magnon scattering similarily to the cases of some magnetic substances. The diamagnetic KZnF
3 shows the normal behaviour of conduction, though the slope of the thermal conductivity
versus temperature is somewhat lower owing to the impurity scattering of phonons than that being expected from Umklapp processes.
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J. A. McComb, S. Nenno, M. Meshii
1964 年 19 巻 9 号 p.
1691-1695
発行日: 1964/09/05
公開日: 2007/05/29
ジャーナル
認証あり
Electron Microscopic observations were made on aluminum liquid-quenched from temperatures ranging between 750° and 950°C. In these liquid-quenched specimens, dislocation loops with and without stacking fault fringes were observed. The equivalent vacancy concentration corresponding to the dislocation loops is estimated to be approximately 2×10
−4; thereby, indicating that the vacancy concentration quencned-in by liquid-quenching is not significantly different from the vacancy concentration obtained by solid-quenching. Tangled dislocations oriented toughly parallel to the specimen plane were also observed in various isolated places throughout specimen. The density of these dislocations is estimated to be of the order of 10
10/cm
2.
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Sen’ichi Togawa
1964 年 19 巻 9 号 p.
1696-1703
発行日: 1964/09/05
公開日: 2007/06/01
ジャーナル
認証あり
The structure factors of calcium fluoride were determind by measuring the integrated X-ray intensities of reflections from powder samples at room temperature. The structure factors measured on a relative scale were brought to the absolute values by the use of the experimental scale factor assuming Freeman’s theoretical value of the atomic scattering factor of Ca
++.
It was concluded that the systematic deviation of experimental values of the atomic scattering factor for Ca,
fCa, from the theoretical ones as previously found by Weiss, Witte and Wölfel (z. phys. Chem.
10 (1957) 98, Rev. mod. Phys.
30 (1958) 51) does not exist. The experimental atomic scattering factors of F atom was proved to agree with those calculated by Boys or by Freeman rather than Berghuis
et al’s one.
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Dilip Singh, Girish Chandra Pande
1964 年 19 巻 9 号 p.
1704-1708
発行日: 1964/09/05
公開日: 2007/06/01
ジャーナル
認証あり
Unsteady laminar boundary layer flow of a viscous incompressible and electrically conducting fluid past a non-conducting infinite porous flat plate subjected to a constant suction in the presence of a uniform transverse magnetic field is considered. The free stream velocity is assumed to be time-dependent. General formulae for the velocity, induced magnetic field, current density and displacement thickness are obtained by using the method of Laplace transformation as a function of free stream velocity under the conditions: (i) The magnetic Prandtl number is unity and (ii) the Alfvén wave velocity is less than the suction velocity. The case of impulsive free stream velocity is studied in detail.
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Ryuzo Koyama
1964 年 19 巻 9 号 p.
1709-1717
発行日: 1964/09/05
公開日: 2007/06/01
ジャーナル
認証あり
The shear rate dependence of flow birefringence of polymer solutions is discussed by making use of the recent statistical theory of flexible random coiling molecule with an assumption of optical interaction between molecular segments in solvent.
The result of calculation shows that the form anisotropy of polymer molecule decreases relatively to the intrinsic anisotropy with increasing shear rate and this property explains the anomalous shear rate dependences of birefringence and extinction angle, observed recently with dioxane solutions of large molecular weight polystyrene by Frisman and Tsvetkov.
The molecular configuration obtained by calculation shows a non-coincidence between the anisotropy of segments-orientation and that of molecular shape-deformation in solution shear, and this confirms the anomaly of extinction angle calculated. The same calculation also shows the expansion of molecular volume by the shear, which accounts for the decrease of form anisotropy due to optical interaction in large shear rates.
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Sigeo Yomosa
1964 年 19 巻 9 号 p.
1718-1730
発行日: 1964/09/05
公開日: 2007/06/01
ジャーナル
認証あり
Two simple physical methods are presented for calculating the electronic band structures of biopolymers such as hydrogen-bonded polypeptides or homopolynucleotides in the Hückel approximation. One is an extended LCAO MO method, or a method of Linear Combination of Molecular Orbitals, and the other is an extended Bloch wave method where the crystal orbitals are constructed from the molecular orbitals of elementary group with the aid of group theoretical considerations. The extended Bloch orbital method seems to be the most simple and powerful tool for dealing with the electronic structures of the multiple conjugate π-electron systems. The brief applications of these two methods to actual biopolymers are made only for the illustration.
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Hiromichi Kondo, Katsushi Toshioka
1964 年 19 巻 9 号 p.
1731-1733
発行日: 1964/09/05
公開日: 2007/06/01
ジャーナル
認証あり
The motion of a charged particle in the static magnetic field which is applied parallel to
z direction and whose magnitude varies in
y direction monotonously tending to 0 is discussed. The orbit of the particle is a spiral directing ±
B×∇
B when the speed of the particle does not exceed a certain value determined by its initial position, whereas when the speed is sufficiently high the particle is driven continuously in the direction of diminishing field strength. The criterion is given as to when the particle shows a spiral motion. When the variation of the field strength is exponential type, the orbit is exactly calculated as an example, and the validity of the theory is confirmed.
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Takur\={o} Ôtsuki
1964 年 19 巻 9 号 p.
1733-1741
発行日: 1964/09/05
公開日: 2007/06/01
ジャーナル
認証あり
The diffraction of a plane acoustic wave by an infinitely thin and rigid rectangular plate is treated theoretically for the case of normal incidence. The rigorous solution satisfying the wave equation and the boundary conditions is obtained by the use of modified Weber-Schafheitlin integrals and hypergeometric polynomials.
The far field, the diffraction coefficient, the total pressure on the plate and its time average are expressed as functions of
ka and
kb, where 2
a and 2
b are the side lengths of the plate and
k is the wave number.
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Takeshi Takeda, Akinori Watanabe
1964 年 19 巻 9 号 p.
1742
発行日: 1964/09/05
公開日: 2007/05/29
ジャーナル
認証あり
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Masayuki Shiga, Yoji Nakamura
1964 年 19 巻 9 号 p.
1743
発行日: 1964/09/05
公開日: 2007/05/29
ジャーナル
認証あり
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Toshio Takada, Masao Kiyama, Yoshichika Bando, Takashi Nakamura, Masay ...
1964 年 19 巻 9 号 p.
1744
発行日: 1964/09/05
公開日: 2007/05/29
ジャーナル
認証あり
-
Koichi Sugiyama
1964 年 19 巻 9 号 p.
1745
発行日: 1964/09/05
公開日: 2007/05/29
ジャーナル
認証あり
-
Masakazu Ishiguro, Takeshi Okuno, Toshikazu Shimada
1964 年 19 巻 9 号 p.
1746
発行日: 1964/09/05
公開日: 2007/05/29
ジャーナル
認証あり
-
Tomonao Miyadai, Yoshiaki Matsuo, Syôhei Miyahara
1964 年 19 巻 9 号 p.
1747
発行日: 1964/09/05
公開日: 2007/05/29
ジャーナル
認証あり
-
Hiromu Sasaki, Akinori Watanabe
1964 年 19 巻 9 号 p.
1748
発行日: 1964/09/05
公開日: 2007/05/29
ジャーナル
認証あり
-
Shoji Tanaka, Kunimitsu Uchinokura
1964 年 19 巻 9 号 p.
1749
発行日: 1964/09/05
公開日: 2007/05/29
ジャーナル
認証あり
-
Akira Sawaoka, Syôhei Miyahara, Syun-iti Akimoto, Hideyuki Fujis ...
1964 年 19 巻 9 号 p.
1750-1751
発行日: 1964/09/05
公開日: 2007/05/29
ジャーナル
認証あり
-
Hiroshi Kodera
1964 年 19 巻 9 号 p.
1751-1752
発行日: 1964/09/05
公開日: 2007/05/29
ジャーナル
認証あり
-
Yasuhiko Syono, Yoshikazu Ishikawa
1964 年 19 巻 9 号 p.
1752-1753
発行日: 1964/09/05
公開日: 2007/05/29
ジャーナル
認証あり
-
Sh\={o}ichi Nasu
1964 年 19 巻 9 号 p.
1753-1754
発行日: 1964/09/05
公開日: 2007/05/29
ジャーナル
認証あり
-
Yoshimi Makino
1964 年 19 巻 9 号 p.
1755-1756
発行日: 1964/09/05
公開日: 2007/05/29
ジャーナル
認証あり
-
Kazuko Kojima
1964 年 19 巻 9 号 p.
1756
発行日: 1964/09/05
公開日: 2007/05/29
ジャーナル
認証あり