All issues
Volume 41 (1976)
- Issue 6 Pages 1821-
- Issue 5 Pages 1445-
- Issue 4 Pages 1093-
- Issue 3 Pages 729-
- Issue 2 Pages 361-
- Issue 1 Pages 1-
Predecessor
- Proceedings of the Physico-Mathematical Society of Japan. 3rd Series
- Proceedings of the Tokyo Mathematico-Physical Society. 2nd Series
- Tokyo Sugaku-Butsurigakukwai Kiji-Gaiyo
- Tokyo Sugaku-Butsurigakkwai Hokoku
- Tokyo Sugaku-Butsurigaku Kwai Kiji
- Tokyo Sugaku-Butsurigaku Kwai Kiji
- Tokyo Sugaku Kaisya Zasshi
Volume 41, Issue 3
Displaying 1-50 of 62 articles from this issue
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Hiroshi Yamamoto, Chihiro Ichihara, Kiyoshi Kawade, Toshio Katoh1976 Volume 41 Issue 3 Pages 729-734
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSDecay of 148Pr has been studied with Ge(Li), NaI(Tl) and plastic detectors in singles and coincidence measurements of γ-rays and β-rays. Sources were prepared by the 148Nd(n, p)148Pr reaction at the neutron energy of about 15 MeV. Forty-one γ-rays were observed. A decay scheme of 148Pr involving 4 new levels, is proposed for the first time, and twenty γ-rays were assigned in this decay scheme. Observed Qβ value was 4.8±0.2 MeV. The half-life was measured to be 2.28±0.09 min.View full abstractDownload PDF (596K) -
Mahito Mabuchi1976 Volume 41 Issue 3 Pages 735-740
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSSolitons and wave trains are studied in the case of low density excitons interacting with each other. It is show that the wave trains in a one-dimentional chain are related to the pulse-like excitons and that in the long wave limit the pulse-like solutions always appear in Bose systems when interactions of Bose particles are described by very short-ranged potentials. The direct interaction between two Frenkel excitons through the Coulomb interaction of composite electrons and holes is also investigated. This interaction falls as R−5, where R is the separation of two excitons, and is weakly repulsive.View full abstractDownload PDF (692K) -
Matoyuki Tanaka, Isao Mannari1976 Volume 41 Issue 3 Pages 741-746
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA statistical-mechanical study of a solvable spin-one system with bilinear and biquadratic interactions is presented for various values of α, the ratio of the bilinear to biquadratic interaction. First, equations to determine the order parameters and the free energy in the equilibrium are derived from the partition function to investigate the phase transitions occurring the model. The magnetic susceptibility is then calculated, and an argument about the critical exponents at the second-order phase transition is given for the case of the critical ratio α=2⁄3, below which the first order phase transition takes place.View full abstractDownload PDF (628K) -
Satoru J. Miyake1976 Volume 41 Issue 3 Pages 747-752
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe next lowest order term of the ground state energy has its origin in lowering of frequencies of phonons localized around the polaron. An eigenvalue equation is derived, the solution of which gives phonon eigenmodes and frequencies in the presence of the polaron. Several eigenvalues are obtained by numerical integration. From the results, the ground state energy is estimated as E0⁄hω0=−0.108513α2−2.836+O(1⁄α2), where ω0 is the frequency of the optical phonon and α is the electron-phonon coupling constant. The numerical value of the effective mass is 0.0227019α4.View full abstractDownload PDF (632K) -
Hideji Yamada1976 Volume 41 Issue 3 Pages 753-761
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA dynamical transverse spin susceptibility is calculated in the random phase approximation on the Hubbard model including the electron-phonon interaction for the system of d-electrons and phonons. The magnon energy and its life time in the long wavelength wavelength are obtained up to the second order terms with respect to the coupling constant in the electron-phonon interaction. It is shown that the shift of the exchange stiffness constant due to phonons is proportional to the fourth power of the temperature except the region of very low temperature in which the zero-point fluctuations of phonons take part in. Furthermore, the inverse of the relaxation time of a magnon with wave vector q is shown to be proportional to q4. The imaginary part of the dynamical transverse spin susceptibility is numerically calculated for the wave vectors near the crossing point of magnon and phonon energies.View full abstractDownload PDF (916K) -
Tsuneharu Takeda, Hidetoshi Fukuyama1976 Volume 41 Issue 3 Pages 762-770
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSMagnetic field dependences of the surface magnetization are evaluated for f.c.c. Heisenberg Ferromagnets in the mean field approximation. Two different kinds of external magnetic fields, H and Hs, are assumed to exist; the former is uniform over whole crystal and the latter is localized in the surface layer. The weak field limit is examined in detail. It is found that the susceptibility of the surface layer with respect to the uniform field, H, varies in proportion to |T−Tc|−1⁄2 for both above and below the Curie temperature Tc and that that with respect to the local field, Hs, varies as const. −(T−Tc)1⁄2 for T>Tc and as const. −(Tc−T) for T<Tc. These temperature dependences are also confirmed by the phenomenological treatments based on the Ginzburg-Landau equation. Validity of the Surface Sheet Model (SSM) is demonstrated.View full abstractDownload PDF (828K) -
Masahiro Inoue, Eiichi Hanamura1976 Volume 41 Issue 3 Pages 771-781
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe Fokker-Planck equation for the number density in energy space of exciton or excitonic molecule which interact with acoustic phonons is derived from the Kolmogorov-Chapman equation in the momentum space. The equation linear in the number density is solved numerically for the weak excitation. The boson character of excitonic molecules plays an important role in the population dynamics so that the Bose-condensation of these particles is expected at high concentration and low temperature. It is discussed how the initial distribution approaches the Bose-condensation, and it is shown for example that the time of an order of sub-nano second is required for the onset of the Bose-condensation in CdS.View full abstractDownload PDF (1376K) -
Akiko Natori1976 Volume 41 Issue 3 Pages 782-786
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSIn a previous paper, the displacive phase transition in narrow-gap semiconductors was investigated in terms of electron-phonon coupled Hamiltonian in the mean-field approximation. In this paper the effect of the lattice anharmonicity on the previous system is examined in the mean-field approximation. In SnTe, the lattice anharmonicity is considered to be the main origin of the temperature dependence of the soft mode frequency. The dependence of the critical temperature on the carrier concentration is calculated with a simple model.View full abstractDownload PDF (572K) -
Yoshitsugu Oono1976 Volume 41 Issue 3 Pages 787-793
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSFor a lattice polymer on the cubic lattice in three dimensional space, it is proved that a single polymer chain is contained in a small volume with probability 1 for negative real z, the measure of the strength of the intrachain interaction, when the polymer length becomes infinite with z being kept finite. The result suggests that the radii of convergence of the perturbation series so far obtained for a chain of finite length N are of order N−1⁄2.View full abstractDownload PDF (932K) -
Tatsumi Mizutani, Teruya Shinjo, Toshio Takada1976 Volume 41 Issue 3 Pages 794-797
Published: September 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSHydrides of Ni-rich Ni–Fe alloys (0∼10% Fe) were prepared by electro-cathodic reaction and studied by Mössbauer spectroscopy. These hydrides were ferromagnetic at low temperatures and the Curie temperature rose steeply with the increase of Fe concentration. The hyperfine field at absolute zero was 250 kOe on the average and the isomer shift was 0.17 mm/sec against the original alloy. These results and X-ray measurements suggest, in the hydrides, Fe atoms have nearly no hydrogen in the nearest neighbors.View full abstractDownload PDF (528K) -
Hiroyuki Yamakawa, Motohiro Matsuura1976 Volume 41 Issue 3 Pages 798-803
Published: September 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSProton NMR of an approximate magnetic sandwich system Co(HCOO)2·2H2O is investigated. From the analysis of angular dependence of the resonance frequency, we determine all the components of paramagnetic sublattice susceptibility tensors and of spontaneous sublattice magnetizations which can not be obtained by the other experiments such as susceptibility, magnetization or torque measurement. These sublattice magnetizations show that exchange interactions in A plane and between A and B planes are antiferro- and ferromagnetic, respectively.
The temperature dependence of spontaneous staggered magnetizations LA0 and LB0 on A and B planes is obtained from that of the resonance frequency. The results |LA0|∝εβ(β=0.13±0.01) and |LB0|∝|LA0|⁄T seem to indicate that the sandwiched paramagnetic ions do not participate cooperatively in the phase transition at TN with the ions on A plane.View full abstractDownload PDF (784K) -
Kazuo Tsuru, Norikiyo Uryû1976 Volume 41 Issue 3 Pages 804-810
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe temperature and the magnetic field dependences of the magnetization of the ferromagnetic layer-type compound K2CuF4 have been analyzed by the spin wave theory which takes into account the spin wave interaction. It is shown that the spin wave interaction plays rather important role in the nearly two-dimensional magnetic system and gives rise to a logarithmic term in the expansion of the magnetization with respect to the temperature. The apparent T3⁄2 temperature dependence of the magnetization can be shown to be realized in a certain temperature region. With the use of the exchange interaction constants estimated in the previous investigations, the present calculation shows excellent agreements with the experiments.View full abstractDownload PDF (728K) -
Satoru Funahashi, Noriaki Kazama1976 Volume 41 Issue 3 Pages 811-816
Published: September 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe spin-wave dispersion relation of Cr-modified Mn2Sb was measured by inelastic neutron scattering through the exchange inversion temperature. A two-dimensional magnetic character perpendicular to c-axis is obvious in the dispersion curves. The interplane exchange interaction changes noticeably with temperature and is well described by a quadratic function of the interplane distance. The elastic constant estimated according to Jarrett’s theory is in fair agreement with that obtained from sound velocity. The second order exchange striction is found to be large; and its relation to the thermal expansion coefficient is discussed.View full abstractDownload PDF (728K) -
Yoshiyuki Ono1976 Volume 41 Issue 3 Pages 817-823
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSPeierls transition in a quasi-one-dimensional non-half-filled tight-binding model is discussed within the mean-field approximation. Even if the deviation of the Fermi level from the center of the band, denoted by μ, is not zero, the periodicity of lattice distortion is commensurate to the original lattice as far as the deviation μ is small compared to Tc0 (the critical temperature in the half-filled case). The first-order phase transition between the commensurate and incommensurate phases is discussed. The dependence of the chemical potential on the order parameter plays an important role in considering the phase diagram in μ–T plane. The temperature dependences of the order parameter and the chemical potential are calculated numerically in the commensurate phase.View full abstractDownload PDF (984K) -
Fumitake Itoh1976 Volume 41 Issue 3 Pages 824-829
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSMeasurements on the temperature dependence of two-photon angular correlation of the positron annihilation for liquid gallium have been made and calculations of the positron annihilation in liquid gallium have been performed using a trapping model. The agreement between experiment and theory is satisfactory, which suggests that the positron in liquid gallium prefers to annihilate in the region of low local ionic density resulting from thermal fluctuations.View full abstractDownload PDF (764K) -
Yasunori Kubo, Shinya Wakoh, Jiro Yamashita1976 Volume 41 Issue 3 Pages 830-835
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe APW method is applied to calculate both scattering cross sections of energetic photons and the angular correlation profile of the positron annihilation radiation of aluminum for three principal directions. The results are compared with available experiments. The calculations show the anisotropy both in the Compton profiles and the angular correlation profiles of positron annihilation radiation. For the former, the structural similarity is found between the theoretical anisotropy and the observed one. For the latter, the theoretical results are in excellent agreement with the observations.View full abstractDownload PDF (656K) -
Takuya Okada, Hisashi Sekizawa, Nobuhiro Shiotani1976 Volume 41 Issue 3 Pages 836-840
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSAngular distributions of two photons resulted from annihilation of positrons in Al were measured along three principal crystallographic directions. The observed distribution curves were compared with the results of the APW calculation by Kubo et al. The fine structures and the anisotropies of the experimental curves verified theoretical predictions and were interpreted in terms of the shapes of the Fermi surfaces. A slight discrepancy that the theoretical curves were a little narrower than the experimental ones in the main part of the curves was found. This discrepancy is ascribed to the effect of the positron-electron interaction. By introducing enhancement factors much better agreement has been attained.View full abstractDownload PDF (664K) -
Takefumi Tsuboi1976 Volume 41 Issue 3 Pages 841-848
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSFine particles of Sn mutually coupled by tunneling through oxide are fabricated, in which average particle sizes and the interparticle coupling can be separately controlled. The temperature dependence of the zero-bias resistance, R, of this system is given by R=R0exp\sqrtT0⁄T in both the normal and the superconducting states, where R0 is a constant. Another constant T0 depends on the particle size but does not on the interparticle coupling. This behavior is explained in terms of thermally-activated tunneling in a bundle of linear chains of particles by taking into account a particle-size distribution. The superconducting transition temperature and the transition width increase as the particle size decreases and/or the interparticle coupling becomes weak. Some possible origins are proposed for these effects.View full abstractDownload PDF (1260K) -
Tetsuo Moriya, Takashi Kushida1976 Volume 41 Issue 3 Pages 849-856
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSMeasurements were made of the emission spectra of high-purity GaAs under intense excitations by a pulsed nitrogen laser at various pumping levels, applied electric fields and lattice temperatures. The results are explained quite well by considering that the radiative exciton-exciton collision processes to leave an exciton in various discrete and continuum states play the dominant role in both spontaneous and stimulated emissions.View full abstractDownload PDF (1108K) -
Takeshi Hagihara1976 Volume 41 Issue 3 Pages 857-864
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe critical shear stress for driving dislocations against dipoles (calcium ion-cation vacancy pair) is determined by the three-point bending test in sodium chloride crystals containing CaCl2 (from 330 to 900 ppm). The relationship between the stress (τ) and the concentration (Xd) of dipoles is found to be τ∝Xd2⁄3. The concentrations of dipoles at R. T. are estimated from the ionic conductivity measurements in the region III with an assumption. The concentrations of effective calcium impurities (C′) for dipole are evaluated 30 percent of the total amount of calcium impurities as doped. The degree of association of calcium ions with cation vacancies, e.g., Xd⁄C′, is estimated as 0.8–1.0 from 530 to 300 K. The contribution of dipoles to the stress increment can be separated from that of another types of aggregates of calcium ions by taking account of the stress magnitude and the concentration.View full abstractDownload PDF (1244K) -
Yukio Osaka1976 Volume 41 Issue 3 Pages 865-871
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSIn order to understand physical origin of interface states in a MOS structure, model calculations of the interface states are carried out. The model of the ideal Si–SiO2 interface is introduced. This model represents that the Si–SiO2 interface is given as the boundary between two bonding-type materials and the intrinsic interface states is absent. It will be assumed that observed interface state is caused by the difference between real interface and the ideal one. Model calculations show the following results. The gate metal is effective on interface state formation only thinner SiO2 film (the film width is less than 20 Å). The density of interface state is nearly independent of the type of metals.View full abstractDownload PDF (612K) -
Yasuaki Masumoto1976 Volume 41 Issue 3 Pages 872-879
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe polarization properties of longitudinal optical (LO) phonon overtones were investigated for resonance Raman scattering (RRS) in CdS. The experimental results indicate that the polarization of LO phonon overtones is strongly correlated with the intermediate electronic states which resonate with the scattered light energy. Temperature dependent polarization properties of Raman lines were observed and these results lead to a conclusion that RRS should be considered as inelastic scattering of polaritons by LO phonons. When the laser light excited the energy region a little lower than the A-exciton resonance energy ET plus an integer times LO phonon energy nhωLO, the zero-phonon A-exciton emission, the Raman line and the hot A-exciton emission were simultaneously observed.View full abstractDownload PDF (1112K) -
Kêitsiro Aizu1976 Volume 41 Issue 3 Pages 880-887
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSFor the sequence of transitions in BSN, five interpretations are proposed. It is assumed that phase I that occurs above about 560°C is prototypic and phases II and III are ferroics derived from phase I. The prototypic space group is almost doubtlessly P4⁄mbm. The soft mode system is assumed to consist of an A2u zero-wavenumber mode and two certain (degenerate or nondegenerate) modes with wavevector (0, 0, 1/2). When the latter modes are degenerate, their appropriate transformation property is uniquely determinate and it is deduced that phase III should belong to space group Cmc21. When nondegenerate, four different pairs of appropriate transformation properties are conceivable for the pair of modes with wavevector (0, 0, 1/2). According to which of these four is assumed, phase III is deduced to belong to space group Cmm2 or Ccc2 and to be of nF=2 or 3 for strain component x6.View full abstractDownload PDF (1052K) -
Yoshimasa Fujii, Tunetaro Sakudo1976 Volume 41 Issue 3 Pages 888-893
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSElectrical field dependence of the dielectric constant in KTaO3 has been measured under the bias field up to 15 kV/cm and in the temperature range between 300 K and 4.2 K. Characteristics of the induced polarization as functions of electric field and of temperature were obtained. A hysteresis phenomenon in the biasing cycle of the dielectric constant was observed at lower temperatures, the characteristics of which were analysed based on a layered structure model. Refractive index of the crystal has been measured in the wave-length region between 0.4 μ and 1.1 μ, and is analysed by the Sellmeier form. The relevance of these experimental results to the nonlinear optical experiment is briefly discussed.View full abstractDownload PDF (688K) -
Syozo Kubo1976 Volume 41 Issue 3 Pages 894-898
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSEffects of anisotropic scattering on temperature distribution of a steady one-dimensional radiative heat transfer through an absorbing, emitting gray medium in a semi-infinite space are analyzed by method of matched asymptotic expansions. An external radiation beam is imposed through a transparent boundary. Rayleigh scattering is considered as a typical model of an anisotropic scattering. The medium is assumed to be non-heat conducting, not to move and to have constant physical properties, The results show that no qualitative difference is shown between the temperature distribution in a scattering medium and that in a non-scattering medium. Only a little quantitative difference is shown for various values of the beam angle. The difference is in 10 percent of the non-scattering value at most.View full abstractDownload PDF (616K) -
Masaru Tsukada1976 Volume 41 Issue 3 Pages 899-907
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe electronic structure of chemisorbed layers on metal surfaces is studied for general coverages. The Anderson model of chemisorption investigated by Newns is used and the CPA method for the random alloy is applied to obtain the Green function of the chemisorbed layer. The state density, the charge on the adatom and the heat of adsorption are calculated as functions of coverage. As a typical example in which the electron correlation is important, H/W(100) system is investigated.View full abstractDownload PDF (984K) -
Motohiko Ishii, Takaho Tanaka, Takashi Akahane, Nobuo Tsuda1976 Volume 41 Issue 3 Pages 908-912
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSInfrared transmission spectra of metallic ReO3 film deposited upon silicon plate have been measured in the region from 1200 to 30 cm−1. Two structures are observed at 905 and 315 cm−1 at room temperature and assigned to the infrared active lattice vibrations of ReO3 crystal. The force constants derived from the elastic constants support these assignments. Raman spectra of ReO3 crystal were also measured and the results are consistent with those of infrared transmission. These results are compared with those of other transition metal oxides. Natures of the optically active lattice vibrations and the metal oxygen bonds in metallic ReO3 are discussed.View full abstractDownload PDF (624K) -
Shigeru Sato1976 Volume 41 Issue 3 Pages 913-920
Published: September 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe fundamental absorption spectra of evaporated thin films of La- and Ce-halides have been measured over a photon energy range from 3 to 40 eV. The fine structures occurring below the threshold in Ce-halides are ascribed to the 4f→5d transition of cerium ion. The Cl−L2,3 absorption spectra of LaCl3 and CeCl3 have been measured at room and liquid nitrogen temperatures. Overall profiles of the spectra are alike between the fundamental and Cl−L2,3 absorption except for the regions near the thresholds. X-ray photoemission spectra of La- and Ce-halides around the valence band have been measured. The occupied 4f level in CeF3 is identified to be well above the valence band, whereas it overlaps the valence band partially in CeCl3 and completely in CeBr3. The fundamental absorption spectra are interpreted qualitatively with the aid of obtained Cl−L2,3 and XPS spectra.View full abstractDownload PDF (1152K) -
Shozo Takeno, Michiyoshi Nagashima, Jun Sugimoto1976 Volume 41 Issue 3 Pages 921-928
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSCoherent states and dynamics of a photon mode in the Dicke model Hamiltonian are studied by using a method of diagonal coherent-state representation. It is shown that under a strong coupling condition the ground state of the model Hamiltonian is characterized by simultaneous appearance of a photon coherent state and that due to atomic polarization. The energy eigenvalue of such a combined coherent state is shown to be lower than that of the in which all atoms in a matter system are in their ground state while no photon is present. An exact solution for the time evolution of the coherent-state representation of the photon number operator is obtained in terms of the Jacobi elliptic functions. It is shown that periodic, pulse-like and stationary solutions exist under various initial conditions.View full abstractDownload PDF (900K) -
Nobukata Nagasawa, Tsuneyoshi Mita, Masayasu Ueta1976 Volume 41 Issue 3 Pages 929-936
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSGiant two-photon absorption spectrum for the direct generation of excitonic molecules is measured with using a frequency tunable dye laser, and absorption peak is found at 3.1870 eV. Emission spectrum with excitation at the giant two-photon absorption band depends on the spectral width, ΔΩ1, of excitation light. In the case of ΔΩ1=0.25 meV, the two-photon resonance Raman scattering is found to be predominant. The Raman process involves an excitonic molecule and a longitudinal exciton as the intermediate and final states, respectively. On the other hand, for the case of ΔΩ1=2.3 meV, the emission spectrum shows a very sharp line at 3.1649 eV, which has been previously ascribed to be due to the Bose-Einstein condensation of excitonic molecules. Discussions are made on the dependence of emission spectrum upon the energy band-width of excitation light.View full abstractDownload PDF (1000K) -
Katsuaki Sato, Tomiharu Kawakami, Teruo Teranishi, Takeshi Kambara, Ke ...1976 Volume 41 Issue 3 Pages 937-941
Published: September 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSOptical absorption spectra are observed for Co2+ ion in CuGaS2 and their brief analysis is given in the framework of the ligand field theory. The polarization dependence of the spectra is elucidated in the vicinity of the [4T1(1)] band (∼7,000 cm−1) and of the [4T1(2), 2T2(1), 2A1] band (∼13,000 cm−1) at 2 K. The adjusted values of low symmetry (D2d) crystal field parameters are ⟨ζ|V(D2d)|ζ⟩=132 cm−1 and ⟨v|V(D2d)|v⟩=−100 cm−1.View full abstractDownload PDF (544K) -
Jun-ichiro Kanbe, Hideo Takezoe, Ryumyo Onaka1976 Volume 41 Issue 3 Pages 942-949
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe reflection spectra of orthorhombic PbCl2 crystals are studied in the exciton region with linearly polarized light at 2 K. It is found that the exciton band splits into two in the spectra obtained with the polarized lights along b- and c-axes. This splitting is explained as due to a combined effect of the crystal field and the Davydov-type interaction of the excitons. The latter effect arises from the fact that the unit contains four PbCl2 molecules different in their orientation. When light propagation in crystal does not coincide with any of crystal axes, an additional structure appears on the higher energy side of the main band, which is attributed to a complex exciton polariton mode peculiar to anisotropic crystals.View full abstractDownload PDF (976K) -
Shigeru Nakayama, Toru Ogawa1976 Volume 41 Issue 3 Pages 950-957
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSBy means of the dressed atom concept examined theoretically by Cohen-Tannoudji and Haroche, the misalignment effects of an oscillating rf-field in optical-rf double resonances are investigated. We present a fully quantum mechanical calculation of higher-order effects in the frequency shifts of new coherence resonance for the general case that a spin-1/2 atom interacts with the oscillating rf-field in optical-pumping. It is analytically shown that the new type resonances can occur even by taking account of higher-order effects in the perturbation theory for the oscillating rf-field whose direction makes a special angle from that of a static field, and that the direction of the shift of the resonance field is not along that of the static field but perpendicular to that of the oscillating field. Theoretical results are compared with optical-pumping experiments of cesium vapor.View full abstractDownload PDF (1144K) -
Yoshihiro Hamauzu1976 Volume 41 Issue 3 Pages 958-964
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSOn the basis of the Lippmann-Schwinger variational theory, an efficient method, called “perturbation-variation method,” for calculating low-energy electron diffraction (LEED) spectra, is developed. The LEED spectra of the (00), (10) and (11) spots from the nickel (100) surface are calculated by adopting the isotropic inelastic scattering model and by using 1) the matrix inversion method, 2) the t-matrix perturbation method and 3) the perturbation-variation method. For the present model, method 1) is exact and methods 2) and 3) are approximations to method 1). It is found that the convergence of method 3) is much faster than that of method 2) for all the LEED spectra calculated with various choices of the s-wave phase shift and the imaginary part of the inner potential.View full abstractDownload PDF (704K) -
Sadao Hoshino, Yasuhiko Fujii, Jimpei Harada, J. D. Axe1976 Volume 41 Issue 3 Pages 965-973
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSPhonon dispersion relations of CuBr having zincblende-type structure were measured by the neutron inelastic scattering technique with a triple-axis spectrometer. The dispersion curves measured at 77 K were well described by the shell model with 14 parameters which has been successfully applied to explain the data for GaAs, GaP and InSb. The elastic constants were obtained both from sound velocities estimated from the initial slopes of acoustic phonon dispersion curves and from the shell-model-fit. The optical phonon energies at the zone center are in good agreement with the Raman scattering data. The temperature dependence of phonon scattering was also measured. It was found that the phonon energies as well as the shape of phonon peaks varied considerably with temperature, suggesting that the effect of anharmonicity is remarkable in CuBr even at room temperature.View full abstractDownload PDF (1112K) -
Hajime Asano, Yoshifumi Abe, Makoto Hirabayashi1976 Volume 41 Issue 3 Pages 974-976
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSHydrogen arrangements in two polymorphic forms, β1 and β2, of V2H have been studied by powder neutron diffraction up to 200°C. The hydrogen atoms in β1–V2H are fully ordered in the specific oz-sites of the body-centered pseudotetragonal vanadium lattice (c0⁄a0\simeq1.1), forming a monoclinic superstructure (A\simeqC\simeq(a02+c02)1⁄2, B=a0, β\simeq2tan−1c0⁄a0) isomorphic with β–V2D. The structure of β2–V2H, which exists between 175° and 220°C, is partially ordered; the hydrogen atoms are distributed among all the oz-sites with a probability of 1/2. The hydrogen distribution in the VH superstructure is proposed to be the full occupation of these sites.View full abstractDownload PDF (352K) -
Yasunobu Seno, Jinya Otsuka, Osamu Matsuoka, Nobuko Fuchikami1976 Volume 41 Issue 3 Pages 977-983
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe electronic structure of the heme-O2 system is studied on the inclined arrangement in which the O–O axis is at 60° to the normal of the heme plane. The method of the calculation is the same as in parts I and II for the parallel arrangement. The results show that the lowest energy eigenvalue is almost equal to that of the 1A2 state of the parallel arrangement and that the eigenfunction of this lowest state is more complicated in the present inclined arrangement, i.e., it is composed mainly of the two basic configurations with almost equal weight, one is the triplet-triplet coupling, and the other the singlet-singlet coupling, and the contribution from some charge transfer configurations is also found. The various interpretations of the recent experimental data seem to be attributable to this complex feature of the of the binding state.View full abstractDownload PDF (952K) -
Takumi Minemoto, Kiyoshi Kakihara1976 Volume 41 Issue 3 Pages 984-990
Published: September 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe magnetic resonance between the Zeeman sublevels in the lower excited states 62P3⁄2 and 72P3⁄2 of 133Cs atom has been observed in a medium magnetic field (15∼160 Gauss) by use of optical double resonance technique. From the positions of the resonance signals, the hyperfine coupling constants A, B, and the quadrupole moment Q have been evaluated as follows: A(62P3⁄2)=50.45 MHz, B(62P3⁄2)=−0.60 MHz, A(72P3⁄2)=16.55 MHz, B(72P3⁄2)=−0.20 MHz, and Q=−0.0045×10−24 cm2. The effects of the collisions with noble gas atoms (He, Ne, and Ar) on the resonance signals have been observed. For the resonance signals between the Zeeman sublevels |F=3, mF=−2⟩↔|3, −3⟩ in 62P3⁄2 state, |4, −3⟩↔|4, −4⟩, |4, −2⟩↔|4, −3⟩, |5, −4⟩↔|5, −5⟩, and |5, −2⟩↔|5, −3⟩ in 72P3⁄2 state, the crosssections of the collisional broadening have been evaluated from variations of the line widths.View full abstractDownload PDF (796K) -
Hiroshi Ryufuku, Tsutomu Watanabe1976 Volume 41 Issue 3 Pages 991-996
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe cross sections for the charge transfer processes:
XZ++X(Z−1)+(1s)→X(Z−1)+(1s)+XZ+
were obtained using the curvilinear-trajectory impact-parameter method. The effect of momentum transfer due to electron transfer is taken is taken into account as a variable velocity expression with respect to collision time. The universal relationship between the scaled cross section Z2σ and the scaled energy E⁄MZ2 (σ being the cross section, E the incident energy and M the mass of nucleus) including that for the H++H case is obtained. Deviations from the universal curve occur due to the effect of Coulomb repulsion in the impact-energy range below 0.1Z2(Z−1) keV. The physical interpretation of the systematic deviation from the universal curve in the low-energy range is also discussed.View full abstractDownload PDF (524K) -
K. S. Rama Sastry, D. Premaswarup1976 Volume 41 Issue 3 Pages 997-1001
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSNQR Zeeman effect studies in 2, 4, 6 Tribromophenyl-p-toluene Sulfonate for 79Br isotope were carried out using single crystals. The value of the asymmetry parameter and the directions of the principal field gradient X, Y, Z axes were determined. The values of the various contributions to the bond character are calculated.View full abstractDownload PDF (540K) -
Tsutomu Ikemura1976 Volume 41 Issue 3 Pages 1002-1013
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSOn the basis of the W.K.B. method, it is shown that an inverse triangle density cavity can trap a pair of temporally growing, oppositely propagating electron Langmuir waves; these are parametrically coupled through a combined action of a density gradient inside the cavity and a high-frequency pump electric field which is uniform outside the cavity. The threshold value of the pump intensity for this decay instability is presented as a monotonously increasing function of the scale size of the trapping regions, the mode number, the Debye length, and the minimum threshold above which the decay instability of the convective-type sets in. Consideration of the electron ponderomotive force created by the intense pump field which is non-uniform inside the density cavity leads to a decrease of the density gradient, resulting in an appearance of the upper threshold above which the trapped waves are damped.View full abstractDownload PDF (1384K) -
Masayoshi Tajiri1976 Volume 41 Issue 3 Pages 1014-1020
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSEffects of ions reflected by the envelope of a modulated ion wave are investigated by applying the reductive perturbation method to the system of characteristic equations of the Vlasov equation. If we assume that the magnitude of the wave potential is of the order of ε, the ions which velocity ranges are of the order of ε are reflected by the envelope of the modulated wave. The effects of reflected ions appear as a precursor and it modifies the nonlinear Schrödinger equation, which governs the wave propagation due to the nonresonant ions.View full abstractDownload PDF (816K) -
Takumi Yamamoto, Yukihiro Nishio, Takashige Tsukishima1976 Volume 41 Issue 3 Pages 1021-1028
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA coherent test wave is allowed to propagate through a stationary and spatially evolving ion wave turbulence which is realized in an unmagnetized argon positive column. It is shown that the observed nonlinear saturation and subsequent damping of the test wave can be well described by an analytic expression based on the theory of perturbed ion orbits, i.e., by an effective increase of ion temperature, provided the initial amplitude of the test wave is less than a threshold value \ ildenk*(0). When the initial amplitude exceeds \ ildenk*(0), generation of subharmonic wave is observed. It is also found that contraction of the wavelength occurs when the test wave with an initial value less than \ ildenk*(0) propagates from a quiescent region to the turbulent region. These phenomena are considered as due to higher-order nonlinear effects.View full abstractDownload PDF (1052K) -
Masaaki Watanabe, Kyoji Nishikawa1976 Volume 41 Issue 3 Pages 1029-1035
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSVarious descriptions for the one-dimensional Langmuir wave soliton are classified according to the relations among various smallness parameters. Four different regimes are found to emerge depending on the relative importance of various forces acting on the electrons and are graphically represented in the parameter space. When the field energy becomes as large as the electron kinetic energy, second harmonic generation and local charge separation (in slow time scale) are found to occur, but their effect on the description of the Langmuir wave soliton is found insignificant. Dynamic behavior of the Langmuir wave soliton is discussed in terms of the trajectory in the parameter space and is compared with recent experimental and numerical analyses.View full abstractDownload PDF (836K) -
Hidenori Akiyama, Susumu Takeda1976 Volume 41 Issue 3 Pages 1036-1040
Published: September 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe plugging is experimentally studied in the steady state plasma with flow by using a cavity. The increase of the density is observed in the upstream side of the cavity, whereas the decrease of the density and the increase of the electron temperature are observed in the downstream side. The density exponentially decreases with the electric field as expected from the theory for the electric field lower than a certain value. However, the density decrease becomes linearly proportional to the electric field, when the amplitude of the high frequency is self modulated.View full abstractDownload PDF (640K) -
Yoneyoshi Kitagawa, Takashi Maekawa, Shigetoshi Tanaka1976 Volume 41 Issue 3 Pages 1041-1049
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSIn a quasi-neutral electron beam of hollow cylindrical type the lower hybrid two stream instability is observed. By applying a radial electric field externally, the perpendicular drift velocity u⊥ is controlled and the enhancement and suppression of the instability are made artificially. Further, the superposition of pulsed radial field shows that the unstable waves grow exponentially and the frequency and growth rate measured as functions of u⊥. These observed behaviors are interpreted by the linear theory of the lower hybrid two stream instability. Experimental results show that, after exponentially growing, the amplitude of the instability is saturated and the ions are heated.View full abstractDownload PDF (1132K) -
Kanemitsu Kato1976 Volume 41 Issue 3 Pages 1050-1053
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSGeneralization of the Bernstein-Greene-Kruskal solution for a one-dimensional collisionless plasma to two and three-dimensional cases is demonstrated. For the case when the potential has the highest symmetry and has a single maximum at the center of the symmetry, explicit expressions for the trapped-particle distribution are obtained in terms of the potential and the other particle distribution functions for the untrapped particles. In particular, it is shown that when the distribution functions depend only on the particle energy, in the two-dimensional case the trapped-particle distribution can be analytic as a function of energy, but is never analytic in the three-dimensional case.View full abstractDownload PDF (424K) -
Kunihito Nagayama, Terutosi Murakami1976 Volume 41 Issue 3 Pages 1054-1061
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe propagation of a converging shock wave in porous solids or mechanical mixtures is studied by means of the hydrodynamic equations with the model constitutive relations. Numerical calculations are made on the concentric layers composed of iron (inner layer) and of a porous or of a composite material (outer layer), and the effects of porosity or mixing ratio on the attained states are investigated. The results show that the pressure profile is not very sensitive to the porosity or the mixing ratio, while the temperature increases appreciably with the porosity.View full abstractDownload PDF (968K) -
Takeyasu Kotera, Katuro Sawada1976 Volume 41 Issue 3 Pages 1062-1066
Published: September 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSWe treat a recurrence formula solely and show that it generates the KdV System, i.e. it generates the generalized KdV equations and the polynomial conserved densities. Thus it seems that almost all contents of the KdV system are contained in the recurrence formula. And this method may be applicable to the recurrence formula for the generalized Zakharov-Shabat case. Further it suggests the generalization of the KdV system by the modification of recurrence formula.View full abstractDownload PDF (340K) -
Nobutake Imamura, Yoshinori Mimura1976 Volume 41 Issue 3 Pages 1067-1068
Published: September 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSWe investigated longitudinal Kerr loops vs composition on Gd–Fe alloy films and confirmed that Kerr rotation in these films was due mostly to the transition metal. The sublattice moment (from the saturation Kerr rotation angle) of iron in GdFe alloy films first increased slightly and suddenly decreased at 10 atomic% GdFe and finally decreased monotonically with decreasing iron content. The effect of this zigzag variation in the sublattice iron moment could be observed in the compositional dependence of the saturation magnetization.View full abstractDownload PDF (276K)