All issues
Volume 31 (1971)
- Issue 6 Pages 1605-
- Issue 5 Pages 1297-
- Issue 4 Pages 961-
- Issue 3 Pages 625-
- Issue 2 Pages 319-
- 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 31, Issue 3
Displaying 1-50 of 56 articles from this issue
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Minoru Takeda, Syohei Kato, Takashi Yamazaki1971 Volume 31 Issue 3 Pages 625-631
Published: September 05, 1971
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSDifferential cross sections for the elastic scattering of alpha particles by 20Ne and 24Mg have been measured at laboratory angle of 176° as a function of incident energy in the range 20 to 24.5 MeV. In alpha –20Ne scattering seven resonances have been observed. Angular distributions have been obtained at nine energies. Tentative spin and parity assignments have been made for five resonances, corresponding to the compound 24Mg nucleus, by phase shift analysis. In the case of alpha –24Mg scattering, many peaks appeared in the excitation curve which shows rather complicated feature. Angular distributions have been measured at nine energies.View full abstractDownload PDF (768K) -
Manabu Fujioka1971 Volume 31 Issue 3 Pages 632-635
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSFrom the M1-E2 mixing of the 111.93 keV transition which connects the 1622.41 keV 5+ and 1510.48 keV 4+ levels in 156Gd the former level is established to be a rotational state built on the latter. The upper limits of the magnitude of M1 component of the 262.54 and 267.07 keV transitions from the 1510.48 and 1622.41 keV levels are obtained to be q(M1)≤2.0% and 6.5%, respectively. These values together with the M1-E2 mixings of other transitions de-exciting the two levels are discussed.View full abstractDownload PDF (424K) -
Tokio Ohta, Ken Yamaguchi1971 Volume 31 Issue 3 Pages 636-640
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe polarization energies of the bound fermion in the core of moving flux line by the core field are calculated. The contribution from around the core center is 10−2–10−3 times of the unperturbed energy, while the peripheral polarization makes 10 or more percent increment of the fermion energy. The polarization by core field may account for that the transport heat exceeds the incremental heat under some conditions.View full abstractDownload PDF (448K) -
Der-Hsueh Wu, Raza A. Tahir-Kheli1971 Volume 31 Issue 3 Pages 641-648
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe improved statistical mechanical approximation developed by one of us is applied to the analysis of published experimental data on the short range order parameters in, and the diffuse X-ray scattering intensities from, the three stoichiometric copper gold binary alloys Cu3Au, CuAu and CuAu3. From this analysis, the corresponding effective pair-wise interparticle potentials extending upto the third nearest neighbor separation are determined. Using a plausible interpolation procedure, from these results for the three stoichiometric compositions, effective pair-wise interparticle potentials are estimated for all compositions in the range Cu3Au to CuAu3. Finally, using these estimates, the variation of the magnitude of the order-disorder transition temperature, Tc, as a function of the system concentration is predicted. These predictions are then compared with the experimental data of Rhines, Bond and Rummel. The agreement of the theoretical predictions with the experimental data Tc is found to be excellent in the range Cu3Au to CuAu and, in particular, the observed minimum in Tc for the composition Cu0.64Au0.36 is faithfully reproduced.View full abstractDownload PDF (1232K) -
Masayuki Hasegawa1971 Volume 31 Issue 3 Pages 649-667
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSEffects of electron-ion interaction on the plasmon damping in metals are investigated by using a general formulation developed in a previous paper. Damping of a plasmon with small wavenumber q is mainly determined by the processes in which the plasmon dacays into (i) one electron-hole pair by interband transition and (ii) one electron-hole pair with simultaneous absorption or emission of a phonon. These processes give negative q2-coefficient of damping in the small wavenumber region. On the other hand, the process in which the plasmon decays into another plasmon with simultaneous absorption or emission of a phonon gives the damping nearly proportional to q. As a whole, with including the contribution of the electron-electron interaction discussed in I, plasmon half-width in Al slightly decreases as q increases in the small q region, while the damping in Na slightly increases with q.View full abstractDownload PDF (1857K) -
Tatsumi Kurosawa, Hajime Maeda1971 Volume 31 Issue 3 Pages 668-678
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSHot electron phenomena in p-type germanium are investigated by using a Monte Carlo method. The variation of the distribution function and other properties is examined for various temperatures and impurity densities, and for a wide electric field range. Some characteristic features proper to the streaming state are described with emphasis.View full abstractDownload PDF (1316K) -
Takasu Hashimoto, Kazuo Hoya, Masuhiro Yamaguchi, Ikuro Ichitsubo1971 Volume 31 Issue 3 Pages 679-682
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe magnetic transitions of the Cr–Te system has not been explained by a suitable model. Therefore, the magnetic properties of the single crystals of Cr2−δTe3, prepared by the chemical transport method, were investigated. From the measurement of the magnetic susceptibility above room temperature S=3.08⁄2 per Cr-ion is obtained, which is coincident with the spin only value of Cr3+ ion and a ferromagnetic transition is found to be expected. While, from the extrapolated magnetization value to 0 K, the Bohr magneton numbers per Cr-ion are 2.02 and 1.96 μB for Cr1.96Te3 and Cr1.98Te3, respectively, and these values are in contradiction to those expected from the magnetic susceptibility. Qualitative considerations about these anomalous magnetic transition are given.View full abstractDownload PDF (512K) -
Tsuyoshi Murao1971 Volume 31 Issue 3 Pages 683-690
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSNuclear magnetism is discussed for a system in which each nuclear spin interacts only with electrons on the same atom by the hyperfine interaction, the electrons having the singlet ground state and interacting with an appreciable exchange interaction. As the exchange interaction approaches to the threshold value to induce a spontaneous electron spin ordering, the Curie temperature of the “nuclear spin ordering” and the “nuclear contribution” to the paramagnetic susceptibility are both raised by the electron exchange enhancement factor and an appreciable electron spin polarization is also induced. There is collective mode of mainly electron spin nature and of mainly nuclear spin nature. The energy gaps at q=0 in their dispersions are obtained in some typical cases.View full abstractDownload PDF (904K) -
Toshiro Akino, Kazuko Motizuki1971 Volume 31 Issue 3 Pages 691-705
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe ground state spin configuration in normal cubic spinels having magnetic ions on B-sites only is studied, with the assumption of four superexchange interactions. Spin configurations are constructed using one wavevector or two wavevectors restricted along one of [001], [110], and [111], and their stability is studied with respect to wavevectors in the whole Brillouin zone. It is shown that a helix with a wavevector (0, 0, k) is stable in a certain region in the exchange-parameter space. Two helices with (k, k, 0) and (k, k, k), and the Yafet-Kittel type configuration have lower energies than all other constructed configurations in certain limited regions, but they are not the ground state. A conehelix [110] having a conical structure in two sublattices and a coplanar helical structure in the other two sublattices has the lowest energy in a large region of the parameter space among all the configurations constructed with two wavevectors. Relevant observed spin structures are discussed.View full abstractDownload PDF (1789K) -
Satoru Sugano, Kiyoshi Aoyagi, Kuniro Tsushima1971 Volume 31 Issue 3 Pages 706-722
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA method of analyzing absorption spectra of Frenkel excitons associated with single-Cr3+ transitions in antiferromagnetic rare-earth orthochromites is presented for both cases with and without an external magnetic field. As the simplest example, exciton lines of YCrO3 in the spectral region of ∼13,800 cm−1 are studied in detail both experimentally and theoretically. Four magnetic-dipole lines are assigned to Davydov-split exciton lines associated with one single-Cr3+ excitation, and matrix elements of excitation transfer in various Cr3+-pairs are determined. It is considered that spin-forbidden excitation transfer between the sublattices of opposite spins is released by a small canting of spins not responsible for the weak ferromagnetism. When a magnetic field along the crystal a-axis is increased up to 50 kOe, spin reorientation from the a-axis to the c-axis is observed in the change of intensities and polarizations of the exciton lines.View full abstractDownload PDF (2464K) -
Tomohiko Kato, Masao Shimizu1971 Volume 31 Issue 3 Pages 723-729
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSMagnetic properties of ZrZn2 alloys with Ti and Hf are investigated by making use of the Wolff-Clogston model extended to the case of many impurities in the self-consistent Hartree-Fock approximation. The self-consistent equations for Green’s function in the magnetic case are derived, by using the result obtained by the graphic method for a disordered system. They are solved explicitly in lower concentrations up to the second-order terms with respect to the impurity potential and the difference between intra-atomic Coulomb integrals at an impurity and a host sites. By the solution corresponding to the Stoner model for a virtual crystal, the experimental results of the spontaneous magnetization, Curie temperature and spin susceptibilities of (Zr1−xTix)Zn2 and (Zr1−xHfx)Zn2 alloys are explained satisfactorily. The correction to the solution for a virtual crystal is estimated to be small. It is concluded that the difference between magnetic properties of these alloys can be explained by the change of the intra-atomic Coulomb integrals in Zr and Ti of Hf atoms.View full abstractDownload PDF (816K) -
Shoichi Mase, Takeshi Sakai1971 Volume 31 Issue 3 Pages 730-737
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA new phenomenon in sound attenuation in bismuth has been observed at liquid helium temperatures and under very strong magnetic-field conditions such that the electrons and holes in the states with the Landau quantum number n=1 almost simultaneously satisfy resonance when varing the field strength in some suitable field directions. The anomalous part of the attenuation at the resonance field position, Δα, obeys the law Δα=A(T⁄Tc−1)−(0.49±0.06) in a limited region of reduced temperature (T⁄Tc−1). The values of the parameters Tc(\lesssim1.6 K) and A depend characteristically on the difference between the resonance field strengths for the electrons and holes. The experimental facts suggest that this phenomenon may be related to the fluctuation of electron-hole pairs produced above the excitonic phase transition temperature.View full abstractDownload PDF (1384K) -
Hiroshi Mori, Shoichi Mase1971 Volume 31 Issue 3 Pages 738-749
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe giant quantum attenuation of longitudinal sound waves in antimony was investigated in pulsed magnetic fields up to 170 kG, at temperatures of about 1.6 K and at sound wave frequencies of 60 and 100 Mc/s. The values of the deformation potential tensor components for the electrons in the principal pocket obtained from an amplitude analysis are as follows:
|Dxx(e)|=6.1 eV, |Dyy(e)|=7.9 eV, |Dzz(e)|=0.44 eV, and Dxx(e)⁄Dyy(e)=−0.77,
where x-, y- and z-axis refer to a binary, a bisectrix and the trigonal axis respectively. A determination of the anisotropy of spin splitting factors (spin splitting/Landau splitting) of the electrons is made for two cases of H||xy-plane and H||yz-plane.View full abstractDownload PDF (1464K) -
Noboru Takimoto1971 Volume 31 Issue 3 Pages 750-767
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe electromagnetic interaction between a plane-bounded semi-infinite metal and an external charge-current is studied theoretically. Quantitative analyses are given of the stopping power and the deflecting force acting upon a point charge moving outside a metal. The nature of the waves excited in the metal depends on the velocity of the charge as well as on the distance of the charge from the boundary plane. The reactive magnetic field acting upon a test current outside a normal and superconducting metal is also studied. The limits of validity of the conventional approach of classical electrodynamics to these problems are clarified.View full abstractDownload PDF (1532K) -
Motohiro Iwami, Hiroyuki Matsunami, Tetsuro Tanaka1971 Volume 31 Issue 3 Pages 768-775
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSN-type Cd3As2 single crystals are prepared by a modified sublimation method, and their galvanomagnetic properties are measured above 2 K. The Hall coefficient is constant from 2 to 300 K, and no anisotropy is observed. The Hall mobility is constant below 15 K and then decreases gradually with increasing temperature. Conduction carriers are degenerate and scattered by both ionized impurities and the acoustical lattice vibration below 300 K. The resistance increment (Δρ⁄ρ0)001010 due to the magnetoresistance effect approaches 14 at 23,000 gauss, and not yet saturates. The longitudinal magnetoresistance coefficient M001001 is nearly equal to zero in samples with carriers of 3×1018/cm3 and does not vanish in samples with carriers of 1×1018/cm3. A simple ellipsoidal energy band is proposed for the former, and an n-germanium type band structure is proposed for the latter. The longitudinal magnetoresistance is not zero for samples with carriers of 1×1019/cm3.View full abstractDownload PDF (1132K) -
Yosio Nisida, Kenju Horii1971 Volume 31 Issue 3 Pages 776-782
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe magnetic field dependence of the shallow donor levels 1s, 2p0, 2p−1 and 3p−1 in germanium was calculated by using two types of variational wave functions each of which is appropriate either for weak magnetic fields or strong magnetic fields. In the range up to γ=0.7 (H=43 kOe), it became evident that for the 1s and 2p0 states the hydrogen-like wave functions give lower eigenvalues, whereas for the 2p−1 and 3p−1 states the harmonic oscillator-type wave functions become more appropriate above about 10 kOe. The effect of the magnetic field on the triplet and singlet ground states was evaluated with inclusion of the central-cell correction for both arsenic and antimony impurities. The optical transitions in the case of H⁄⁄[111] and E⊥[111] were considered.View full abstractDownload PDF (908K) -
Kenju Horii, Yosio Nisida1971 Volume 31 Issue 3 Pages 783-791
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe Zeeman spectra of arsenic and antimony donors in germanium were measured at liquid helium temperature with a static magnetic field along a [111] direction and up to 46 kOe. The Zeeman spectral lines of 2p0, 2p±1 and 3p±1 were compared with the theory presented in a preceding paper. As a result, it was substantiated that the description of these donor levels can be well approximated by accounting only the longitudinal-axis component of the magnetic field for each velley, and also that the higher the levels the transformation from the weak approximation to the strong field approximation occurs at lower fields, The splitting of the ground states in the presence of a magnetic field was found to coincide with the theoretical prediction including the central-cell correction treated phenomenologically besides the magnetic field effect. On the basis of these comparison all the remaining absorption peaks were assigned to the hydrogen-like levels or the bound Landau levels.View full abstractDownload PDF (1260K) -
Yasuharu Makita, Minoru Sumita1971 Volume 31 Issue 3 Pages 792-796
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe complex dielectric constant of methylammonium aluminum sulfate dodecahydrate, CH3NH3Al(SO4)2·12H2O, was measured at various frequencies in a frequency range between 1×106 and 1×109Hz in its para- and ferroelectric temperature regions. The experimental result was analyzed for the paraelectric phase. The crystal exhibits critical slowing-down process of polarization. The observed temperature and frequency dependences of the complex dielectric constant can be described to good approximation in terms of a single relaxation time τ(T) of Debye type. Above the Curie point (Tc), the static dielectric constant follows the Curie-Weiss law ((ε0−ε∞)∼(T−T0)−1), while τ(T) is described well by the relation τ(T)=α·(T−T0)−1·exp(ΔU⁄kBT) with the potential barrier height ΔU=(2.18±0.06) kcal·mol−1 and α=(0.92±0.14) (h⁄kB).View full abstractDownload PDF (584K) -
Masao Tomura, Yoshihiro Takahashi1971 Volume 31 Issue 3 Pages 797-801
Published: September 05, 1971
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe decay times of excimer emission of pure and perylene doped pyrene crystals were measured by a pulse method and, thereby, the probability of energy transfer from the excimer to doped perylene molecules was obtained. Furthermore, its temperature dependence was obtained. By the analysis of these results the diffusion coefficient D of the excimer migration in the pyrene crystal was obtained as D=D0exp(−E⁄kT) (D0=1.0×10−2 cm2 sec−1 and E=0.071 eV). It was confirmed that the excimer could migrate like an exciton in the pyrene crystal.View full abstractDownload PDF (600K) -
Kêitsiro Aizu1971 Volume 31 Issue 3 Pages 802-811
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe transformation of Gd2(MoO4)3 from the prototypic phase to the ferroelectric-ferroelastic phase should be caused by instability of two degenerate modes of lattice vibration each of which has a wave length equal to 2a in both the tetragonal a and b directions. Upon this recognition and a few assumptions, a comprehensive investigation is made into the temperature dependences of electrical, mechanical and optical properties of Gd2(MoO4)3. Of the deduced results those which have experimental data available for comparison are found to agree qualitatively well with the experimental results. The order of the phase transformation is affirmed to be first.View full abstractDownload PDF (1300K) -
Hidetoshi Fukuyama, Tatsuzo Nagai1971 Volume 31 Issue 3 Pages 812-822
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSAnomalous behaviors of the ultrasonic attenuations in Bi under strong magnetic fields found by Mase et al. are analyzed by taking account of the excitonic instability. Characteristic features of anomalous growth of the peak value of the lower field side, in the case where the two peaks of the attenuation coefficient due to electrons and holes lie close as a function of magnetic field, can be attributed to the fluctuation of the order parameter of excitons above the critical point Tc, which is around 1 K. Critical exponent of the excess contributions from the fluctuation to the attenuation coefficient is one half, which is in accordance with the experiments.View full abstractDownload PDF (1288K) -
Akikatsu Sawada, Yoshihiro Ishibashi, Yutaka Takagi1971 Volume 31 Issue 3 Pages 823-827
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA digital technique especially suitable for detecting minute changes in dielectric constant has been applied to the study of triglycine sulfate. The change of dielectric constant under external electric field has been studied at various temperatures in the vicinity of the Curie point. One of the gap exponent defined by Fisher et al. is determined as 1.3\lesssimΔ4\lesssim1.5 in the paraelectric phase of triglycine sulfate.View full abstractDownload PDF (544K) -
Teruhiko Hoshina, Shigeo Kuboniwa1971 Volume 31 Issue 3 Pages 828-840
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSSharp no-phonon lines associated with phonon sidebands have been observed in 4f-5d excitation spectra for Tb3+ and Ce3+ as well as in emission spectra of Ce3+, in Sc, Y and Lu orthophosphates at low temperatures. The spectra manifest themselves as if the 5d electron did not see the tetragonal field component. Energy level schemes of the 4f75d(Tb3+) and 5d(Ce3+) configurations are discussed. The 4f-5d transition matrix elements are calculated for Ce3+. The phonon sidebands are believed to reflect the vibrations of the pure lattices.View full abstractDownload PDF (1472K) -
Naoto Yamada, Shigeo Shionoya1971 Volume 31 Issue 3 Pages 841-851
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSAbsorption and excitation spectra associated with the 4f-4f transitions of Eu3+ ions in CaWO4:Eu, Na, NaEu(WO4)2 and KEu(WO4)2 were studied at low temperatures. Vibronic transitions are observed as bands with fine structure composed of sharp lines. The observed vibronic spectra were compared with the k=0 phonon spectra of CaWO4. Fairly good agreement is found between the both spectra, and the existence of a distinct gap in the spectra is noted. The intensity of the vibronic transition associated with 7F0→5D1 transition is weaker by one order of magnitude than those associated with 7F0→5D0 and 5D2 transitions. These results are well interpreted by use of Judd and Ofelt’s theory. Namely, the 7F0→5D0 and 5D2 vibronic transitions are allowed by the first-order electric-dipole, while the 7F0→5D1 vibronic transition is only allowed by the second-order electric-dipole and first-order magnetic-dipole.View full abstractDownload PDF (1392K) -
Isao Shimamura1971 Volume 31 Issue 3 Pages 852-871
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSAn operator formalism of the general single-channel Kohn method is developed, and Schwartz’s theory of singularities in the Kohn method is generalized; any approximation method described in the framework of the Kohn method is shown to have, in general, singularities, some of which may correspond to true (either closed-channel or shape) resonances. Caution is urged against simple interpretation of “resonance results” of close-coupling calculations and other expansion methods. The Feshbach QHQ eigenvalues are shown to be approximations to the positions of the Kohn-method singularities. A correction to the Schwartz theory leads to the Harris method. Precisely at the characteristic Harris eigenvalues, the Hulthén condition ⟨Ψ|E−H|Ψ⟩=0 cannot be satisfied in general, though, as was shown previously, a well-defined limiting value (which is equal to the Harris value, and has a first-order error contrary to a variational phase shift) of the Hulthén phase shift exists. An elaborate Kohn-method calculation of e+H elastic scattering produces the lowest singlet resonance position which gives the level shift of 1.0×10−5 Rydberg from the autoionizing-state energy calculated by Bhatia, Temkin, and Perkins.View full abstractDownload PDF (2655K) -
Hiroyuki Tawara1971 Volume 31 Issue 3 Pages 871-878
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe cross section for one-electron stripping from the ground state and metastable helium atoms in molecular hydrogen gas have been measured in the energy range from 14 to 50 keV using the beam attenuation technique developed by Gilbody et al. The fraction of the metastable atoms in the neutral helium beam after traversing a thin hydrogen gas has also been determined, from which the cross sections for one-electron capture by singly charged helium ions resulting in the ground state and metastable helium atoms have been estimated. The present results are in good agreement with previous experimental data and calculations by Bates et al.View full abstractDownload PDF (1180K) -
A. Qadeer, M. N. Sharma, A. S. Verma1971 Volume 31 Issue 3 Pages 879-881
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe utility of Rao’s rule has been extended to spherical and non-spherical molecules of some of the gases at their liquefaction temperature on the basis of interaction potential. The necessary equation for Rao’s constant has been derived in terms of potential parameters and the formula for the velocity of sound in different gases at their liquefaction temperature has been suggested. The present approach is simple and adequate keeping in view the approximation involved in the theory.View full abstractDownload PDF (300K) -
Katsumi Yonei1971 Volume 31 Issue 3 Pages 882-894
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSIn order to remedy the well-known defect of the Thomas-Fermi-Dirac (TFD) theory which in its usual treatment fails to give a stable binding state of a molecule, the Weizsäcker correction multiplied by a constant weighting factor λ (=1⁄5) is introduced as a quantum correction.
Numerical calculations to solve this extended TFD equation are carried out for the nitrogen molecule, and it is shown that the TFD model with the modified Weizsäcker correction surely yields an energetically stable molecule.
The calculated values of the dissociation energy De and of the equilibrium internuclear distance Re are 0.342 a.u. and 2.425 a.u., respectively. These values are in good agreement with experiment.View full abstractDownload PDF (1584K) -
Hideo Suzuki, Naosada Takizawa, Toshiro Komatsu1971 Volume 31 Issue 3 Pages 895-903
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSPrevious LCAO-ASMO-SCF-CI calculation on the π-electron system in carotenoids has been defective in the following two respects. Firstly, the relation between bond order and bond distance assumed tentatively there (being a phenomenological description of the σ-π interaction by which the bond alternation is caused) seems to be not necessarily reasonable. Secondly, a sufficient number of singly- and doubly-excited singlet-configurations have not been included in the CI calculation, so that there have remained some ambiguities in the parametrization. The purpose of the present paper is to remedy these faults of the previous calculation, to establish a firm foundation for the explanation of the optical properties of carotenoids in photoreceptor systems.View full abstractDownload PDF (1176K) -
C. G. Kartha, A. R. K. L. Padmini1971 Volume 31 Issue 3 Pages 904-909
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe ultrasonic and viscous behaviour of cholesteryl stearate which exhibits multiple mesophase transitions is studied. The variation of ultrasonic velocity (V), adiabatic compressibility (βad), molar sound velocity (R), viscosity (η) and flow activation energy (Ev) with temperature have been studied in the isotropic, cholesteric and smectic mesophases. The velocity measurements are carried out with a fixed-path double-crystal interferometer and viscosities are measured by a cone-and-plate viscometer within a narrow range of shear rate. The adiabatic compressibility shows abrupt decrease in the vicinity of the thermodynamic transitions between the smectic, cholesteric and isotropic states. The plot of logη vs (1000/T) exhibits changes in slopes at the smectic-cholesteric and cholesteric-isotropic transitions. The activation energy for viscous flow is computed. The ultrasonic velocity data in this liquid crystal is reported for the first time.View full abstractDownload PDF (776K) -
Masahiro Nishikawa, Yoich Fujii-e, Tokuo Suita1971 Volume 31 Issue 3 Pages 910-918
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSAtomic collision processes occurring in a flowing mercury afterglow excited by d. c. discharge are investigated by probe and optical measurements.
The electron attachment process near the discharge source can be interpreted as the production process of temporary negative ions shown by U. Fano and J. W. Cooper.
From decrease in density of the metastable atom somewhat distant from the discharge source, the diffusion coefficient and the conversion frequency from metastable atoms to metastable diatomic molecules are estimated to be 82/p cm2s−1 and 830 p s−1 at about 400 K, respectively.
From decrease in intensity of Hg lines at slow constant rate it is found that the conversion from atomic ions to molecular ions occurs at the rate of 150 p2 s−1 and the dissociative recombination coefficient is 3.7×10−7 cm3s−1.View full abstractDownload PDF (1060K) -
Masashi Kando, Susumu Takeda1971 Volume 31 Issue 3 Pages 919-924
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe theory of the diffusion wave proposed by Golubev in magnetized plasmas is extended to include the wide ranges of the pressure and the magnetic field. The wave of 2 kHz is excited at the tube end by modulating the amplitude of the high frequency, which produces an axially decaying plasma in a He gas at the pressure of 80 mTorr. The diffusion coefficients parallel and perpendicular to the magnetic field are calculated from the measured phase constant of the excited wave and the density decaying length, and agree fairly well with the ambipolar values, so far as the noise level is relatively low. The oscillation has almost a constant frequency of a few kHz in the magnetic field higher than 320 Gauss. It is found that the oscillation results from a helical type instability.View full abstractDownload PDF (852K) -
Shuichi Takamura, Shuko Aihara, Kazuo Takayama1971 Volume 31 Issue 3 Pages 925-934
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe properties of ion waves in a high frequency electric field are studied. The modification of ion wave dispersion is obtained when ion waves are excited externally. The frequency shift and suppression of ion wave instabilities are observed. These phenomena are discussed under the new theoretical analysis.View full abstractDownload PDF (1172K) -
Masakazu Katagiri1971 Volume 31 Issue 3 Pages 935-939
Published: September 05, 1971
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThis paper is concerned with the numerical investigation of the two-dimensional unsteady incompressible boundary layer near the forward stagnation point of an infinite plane wall, with uniform suction or injection through the wall. The velocity of the external flow as well as that of suction or injection is assumed to be kept constant in time t after their impulsive start from rest at t=0. Since the governing equation for the present problem proves to be non-similar, an attempt to solve it is made by employing the difference-differential method, together with the iterative scheme in solving the resulting differential equations. Numerical results are given for the velocity profile, skin friction, displacement thickness and momentum thickness.View full abstractDownload PDF (616K) -
Masanori Abe, Masao Kawachi, Shoichiro Nomura1971 Volume 31 Issue 3 Pages 940
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
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Katsuhiro Shimohigashi, Isao Yamada, Kazuyoshi Hirakawa1971 Volume 31 Issue 3 Pages 941
Published: September 05, 1971
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (160K) -
Yoshikazu Miyahara, Shigeaki Takajo1971 Volume 31 Issue 3 Pages 942
Published: September 05, 1971
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (104K) -
Noriaki Kazama, Hiroshi Watanabe1971 Volume 31 Issue 3 Pages 943
Published: September 05, 1971
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (128K) -
Toshio Maeda, Hiroshi Yamauchi, Hiroshi Watanabe1971 Volume 31 Issue 3 Pages 944-945
Published: September 05, 1971
Released on J-STAGE: May 29, 2007
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Akihiro Moritani, Kenji Taniguchi, Chihiro Hamaguchi, Junkichi Nakai, ...1971 Volume 31 Issue 3 Pages 945
Published: September 05, 1971
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Koji Kajita, Taizo Masumi1971 Volume 31 Issue 3 Pages 946
Published: September 05, 1971
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Hiroshi Ohkura, Yuzo Mori, Masao Hishii1971 Volume 31 Issue 3 Pages 947
Published: September 05, 1971
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Yoichi Kawaguchi, Shinji Kawaji1971 Volume 31 Issue 3 Pages 948
Published: September 05, 1971
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Ichiro Sudo, Saburo Endo, Taizo Irie, Hisayuki Nakanishi1971 Volume 31 Issue 3 Pages 949
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Koichi Mizushima, Shuich Iida1971 Volume 31 Issue 3 Pages 950
Published: September 05, 1971
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Ikuo Suzuki, Ryuji Abe1971 Volume 31 Issue 3 Pages 951
Published: September 05, 1971
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Akikatsu Sawada, Yutaka Takagi1971 Volume 31 Issue 3 Pages 952
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Tatsumi Kurosawa, Wataru Sasaki1971 Volume 31 Issue 3 Pages 953
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Seishi Kikuta, Kazutake Kohra, Nobuaki Minakawa, Kenji Doi1971 Volume 31 Issue 3 Pages 954-955
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Tunemasa Taguchi, Kenshiro Nakashima1971 Volume 31 Issue 3 Pages 955
Published: September 05, 1971
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