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 6
Displaying 1-50 of 56 articles from this issue
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Yoshihiro Sato, Hisahiko Sugimoto, Takeshi Saito1976 Volume 41 Issue 6 Pages 1821-1829
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSNuclear interactions at a mean energy of about 20 TeV are studied by means of a nuclear emulsion chamber with jet producer. In the present analysis, particular emphasis is placed on the experimental condition. The transverse momentum spectrum of secondary γ rays is approximated by a single exponential in a range of 0.3<ptγ<1.2 GeV/c. The mean transverse momentum of π0 mesons is estimated to be 0.44±0.02 GeV/c. The fractional energy spectrum of γ rays, Eγ⁄ΣEγ, in the range of 0.003<Eγ⁄ΣEγ<0.7, is not represented by a single exponential, but by a spectrum expected on the assumption that the fractional energy spectrum of the parent π0 mesons, f=Eπ0⁄ΣEπ0, becomes f(dN⁄df)∝exp(−f⁄f0). These results are compared with those of other similar experiments and accelerator experiments.View full abstractDownload PDF (1220K) -
Toshiyuki Hattori, Minoru Adachi, Hiroshi Taketani1976 Volume 41 Issue 6 Pages 1830-1842
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSProperties of excited states in 108Ag and 110Ag were studied using the 108Pd(p, nγ) 108Ag and 110Pd(p, nγ) 110Ag reactions. The low-lying level schemes of 108Ag and 110Ag were built from the γ-ray excitation functions. Spins were assigned by comparing the measured γ-ray angular distributions and excitation functions with predictions of the statistical compound-nucleus model. The following spin-parity assignments were obtained for the levels and nuclei indicated: 192.7 keV, 1+ or (2+); 206.2 keV, 2+; 215.1 keV, 3+; 294.5 keV, 2(+); 324.4 keV, 3+; 338.4 keV, 3− and 379.4 keV, 1− for 108Ag and 118.7 keV, 3+; 191.2 keV, 3; 198.3 keV, 2 and 267.0 keV, (0, 1, 2) for 110Ag.
With the methods of pulsed-beam delayed coincidence and pulsed-beam DPAD, lifetimes and g-factors of isomeric states in both nuclei were measured. The results are T1⁄2=45.8±0.7 ns and g=+1.301±0.011 for the 215.1-keV state of 108Ag and T1⁄2=36.7±0.7 ns and g=+1.242±0.012 for the 118.7-keV state of 110Ag.View full abstractDownload PDF (1684K) -
Hironari Yamada, Toshio Katoh, Manabu Fujioka, Mitsuhiro Sekikawa, S. ...1976 Volume 41 Issue 6 Pages 1843-1850
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSInternal conversion electron spectra from the decay of 156Eu were measured at high resolution with an air-core, β-ray spectrometer. The source of 156Eu was made through the double neutron capture process by irradiating separated 154Sm with thermal neutrons and was chemically separated. Our data were combined with recent gamma-ray data to deduce conversion coefficients for 47 transitions. The 0+ states at 1049.4, 1168.1 and 1715.2 keV were confirmed. Spins and parities of other states were also assigned or confirmed. A method of analysis for β-band de-excitations is developed with ratios of E2/E0 matrix elements. The β-ground mixing parameter of 156Gd is obtained to be 0.014, while the β-γ mixing parameter 0.029 for the 2β+ state and 0.005 for the 4β+ state.View full abstractDownload PDF (1100K) -
Hiroyuki Kaga, Akio Kotani, Yutaka Toyozawa1976 Volume 41 Issue 6 Pages 1851-1860
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe interplay of the local and band characters in the core photoelectron spectra of metals with incomplete shell (represented by d) has been studied by taking into account the spin-dependent interactions; (i) the exchange coupling between the localized d-electron and the core-hole in the final state, and (ii) the Coulomb repulsion between the d-electrons with opposite spins in the initial and final states. These interactions compete with the kinetic energy in the conduction band (denoted by s) through the s-d mixing interaction. The core-d triplet and singlet states as well as the vacant and doubly occupied d-states manifest themselves, as final states, with various characteristic line-shapes such as the singular edge, the lifetime broadened Lorentzian peak or step, depending on their relative positions. Overall photoelectron spectra were obtained for three typical cases of the initial and final d-levels.View full abstractDownload PDF (1284K) -
Hiroyuki Kaga1976 Volume 41 Issue 6 Pages 1861-1869
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSOverall line-shapes of the photoelectron spectra of core electrons in metals with incomplete shell are calculated numerically in details on the model proposed in a preceding paper. Three possible cases of the initial and final d-levels, which are of interest for those unfilled narrow-band metals, have been treated for the realistic values of various parameters. It has been found that the local line-shapes of numerical photoelectron spectra are well represented by the analytical ones for small s-d transfer energies but can become quite dissimilar to the latter when the s-d transfers increase. Recent experimental observations of the obscure multiplet-splittings in the transition metals are argued to be possibly interpreted in terms of the present model with fairly large s-d interaction strengths.View full abstractDownload PDF (884K) -
Masakazu Ichiyanagi, Masato Ooya1976 Volume 41 Issue 6 Pages 1870-1875
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA theory is formulated for the ground state of a degenerated Bose system at zero temperature. By making use of the self-consistent field method, we determine the physical excitation of the system. The physical fields are obtained from the particle fields by the unitary transformation. The condensate wavefunction is determined as the expectation value of the slowly-varying field in the superfluid ground state, which is the vacuum state of the rapidly-varying (physical) field operator.View full abstractDownload PDF (704K) -
Akio Kanbayasi1976 Volume 41 Issue 6 Pages 1876-1878
Published: December 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSMagnetic measurements on single-crystal specimens of SrRuO3 having perovskite structure were made by a magnetic balance. It was found that the ferromagnetic moment in SrRuO3 could be technically saturated in a finite magnetic field along an easy axis, ⟨110⟩. The spontaneous moment was estimated to be 1.10±0.09 μB at 4.2 K. The thermomagnetic curve could be well reproduced by the one calculated in the molecular-field approximation for S=1⁄2. The χ−1 vs T curve measured obeys the Curie-Weiss law from 300 K to 700 K. SrRuO3 has a fairly large amount of cubic magnetocrystalline anisotropy (K1≅−1.6×106 erg/cm3 at 4.2 K.). It is concluded that the reduced ferromagnetic moment in this case is smaller than the one expected for the low-spin state of Ru ions at the octahedral sites, and that this can not be attributed to any technical magnetization processes.View full abstractDownload PDF (396K) -
Akio Kanbayasi1976 Volume 41 Issue 6 Pages 1879-1883
Published: December 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSMagnetocrystalline anisotropy in SrRuO3 is measured by a torque magnetometer using a single-crystal sample. It is found that it has a large amount of magnetic anisotropy. (K1=6.35×106, K2=(−)10.84×106 and K3=5.33×105 erg/cm3 at 4.2 K.), where the anisotropy energy is expressed as,
EK=K1cos2θ+K2cos4θ+K3sin4θcos2φsin2φ.
The a- and b-axes of the crystal are two easy axes of magnetization, but the c-axis is only a stable direction of magnetization in a magnetic field. Torque curves observed (in the (010) and (110) planes) are rather unusual, but are analyzed by a ‘partially rotatable magnetization vector’ model. Temperature variations of K1, K2, and K3 were also investigated. Some possible origins of the large anisotropy in SrRuO3 are suggested.View full abstractDownload PDF (628K) -
Satoru Simizu, Tomio Nishitani, Takashi Watanabe1976 Volume 41 Issue 6 Pages 1884-1889
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe magnetic susceptibility and the specific heat of Ni(NH3)2Ni(CN4)·2C12H10 have been measured between 0.35 K and 20 K on a powder specimen. The crystalline-field splitting energy of the Ni++-ion spin triplet is estimated to be 2.5±0.3 K with doublet ground state (Sz=±1). Together with a layer structure of the magnetic ions in this clathrate compound, the magnetic spins can be regarded as forming a two-dimensional Ising-like system. A symmetric logarithmic divergence of the specific heat is actually observed at TN=0.800±0.005 K.View full abstractDownload PDF (700K) -
Koichiro Inomata1976 Volume 41 Issue 6 Pages 1890-1893
Published: December 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSNuclear magnetic resonances of Co59 in R2Co17 (R=Ce, Pr, Gd, Tb, Dy, Ho) are observed at liquid N2 temperature. Hyperfine fields of Co59 are estimated using HCo=(a+b NCo)μCo+cNRμR(s) and compared experimentally, where a=−30.4 kOe/μB, b=−7.8 kOe/μB, NCo and NR are the number of Co and R neighbors, respectively, and μCo and μR(s) are magnetic moments of Co and R spins, respectively. Magnetic moments of R2Co17 are also calculated, based on NMR observations, and shown to be in agreement with magnetic measurement data. It is pointed out that the Co magnetic moment surrounded locally by only cobalt atoms will be different from that of the other cobalt sites.View full abstractDownload PDF (524K) -
Koki Abe, Yoshiko Miyamoto, Soshin Chikazumi1976 Volume 41 Issue 6 Pages 1894-1902
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe magnetocrystalline anisotropy of low temperature phase of magnetite (Fe3O4) was measured for a monoclinic single phase specimen by using computerized fully-automatic torque magnetometer. The anisotropy is expressed by
Ea=Kaαa2+Kbαb2+Kaaαa4+Kbbαb4+Kabαa2αb2−Kuα1112,
where αa, αb and α111 are direction cosines of the magnetization with respect to the monoclinic a-, b- and cubic [111] axes, respectively, the last of which coincides with the longest cube diagonal. The values of the anisotropy constants at 4.2 K are: Ka=25.5, Kb=3.7, Ku=2.1, Kaa=1.8, Kbb=2.4 and Kab=7.0 in 105 erg/cm3. It was found that Ka, Kb and Ku exhibit the temperature dependence of an activation type with the activation energy of about 0.02 eV. It was also found that the constants Kaa, Kbb and Kab are well expressed in terms of cubic K1. The mechanism of the anisotropy is also discussed.View full abstractDownload PDF (1080K) -
Yoichiro Numasawa, Takashi Watanabe1976 Volume 41 Issue 6 Pages 1903-1906
Published: December 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe magnetic susceptibility of CaCu(CH3COO)4·6H2O has been measured down to 27 mK. The Weiss temperature θc⁄⁄=−43±4 mK, θc⊥=−48±4 mK, and T(χc⁄⁄max)=39.0±0.7 mK, T(χc⊥max)=41.0±0.7 mK. The result is that of a spin S=1⁄2 and the two-dimensional nearly-Heisenberg antiferromagnet.View full abstractDownload PDF (364K) -
Hiroyuki Nagai, Hiroshi Yoshie, Takao Unate, Akira Tsujimura, Jacques ...1976 Volume 41 Issue 6 Pages 1907-1910
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe nuclear magnetic resonances of Co59 in (Y1−xGdx)2Co17 have been observed at 77 K as a function of x (0≤x≤1). The difference in resonance frequencies between Y2Co17 and Gd2Co17 is at most 7 kOe in magnitude, which is comparable to that obtained in GdCo5. The sign of the obtained difference depends on the Co sites. The difference is qualitatively explained as the contribution of 4f electrons of Gd atoms to the hyperfine field. The temperature dependence of the resonance frequencies in Gd2Co17 has also been measured.View full abstractDownload PDF (496K) -
Hitoshi Yamazaki1976 Volume 41 Issue 6 Pages 1911-1917
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSTo determine the interlayer exchange field HE′ in quasi-two-dimensional magnets (CnH2n+1NH3)2CuCl4 with n=1−6 and (C6H5CmH2mNH3)2CuCl4 with m=1, 2, the lowest Brillouin-zone-boundary magnons are parametrically excited by parallel pumping technique in the temperature range from 1.2 to 4.2 K and at a pumping frequency of 8.9 GHz. The values of HE′ extrapolated to T=0 K are as follows: 45±5 Oe(n=1), −850±20 Oe(n=2), −17±3 Oe(n=3), −17±3 Oe(n=4), −16±3 Oe(n=5), −11±3 Oe(n=6), 9±3 Oe(m=1) and 6±3 Oe(m=2), where positive and negative values correspond to the ferromagnetic and antiferromagnetic fields, respectively. The ratio of the interlayer exchange field to the intralayer exchange field for the m=2 compond is 1.1×10−5, which is the smallest value among these componds. The orthorhombic anisotropy fields for these compounds are determined by means of ferromagnetic resonance. The relation between the transition temperature and HE′ is discussed.View full abstractDownload PDF (828K) -
Mamoru Mekata, Yuji Kano, Masaru Moriya, Kazuhiko Tsuji, Taiichiro Has ...1976 Volume 41 Issue 6 Pages 1918-1926
Published: December 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSPerturbed angular correlation technique has been utilized to observe the fluctuation of the hyperfine field at 140Ce nuclei in La1−xYx alloys from 1.7 K to 300 K at vanishing concentration of the Ce impurity without applying an external magnetic field. The fluctuation is associated with the localized 4f electron spin of Ce atoms. The temperature dependence of the fluctuation time deviates from the 1/T dependence of Korringa relaxation. The deviation becomes more prominent as the Y concentration increases. The phenomenon has been interpreted in terms of the Kondo effect. The Kondo temperatures were deduced from the temperature dependence of the fluctuation time. The relaxation of 140Ce nuclear spin is also discussed.View full abstractDownload PDF (1132K) -
Satoru Ohno, Shigeru Tamaki1976 Volume 41 Issue 6 Pages 1927-1930
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe magnetic susceptibilities of liquid In–Sb, Tl–Sb and Tl–Bi alloys have been measured from their melting points to 1000°C. All of the absolute values of susceptibilities measured are much the same in magnitude to those of a free electron theory. However, the isothermal susceptibility curve for composition has an anomalous deviation from the smoothed interpolation. The maximum deviations occur near the compositions of InSb, Tl2Sb7 and TlBi2, respectively. These anormalies are explained by the electron-ion interaction under the influence of many electron effect.View full abstractDownload PDF (352K) -
Naoki Honda, Yasunori Tanji, Yasuaki Nakagawa1976 Volume 41 Issue 6 Pages 1931-1937
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSLattice parameters and elastic moduli of polycrystalline γ Mn alloys containing 12–40 at% Ni have been measured in a temperature range between −180° and 250°C. The face-centred cubic lattice undergoes a tetragonal distortion, either c⁄a<1 or c⁄a>1, or an orthorhombic distortion at low temperatures. Both Young’s modulus and shear modulus exhibit a step-type change at the Néel point and a broad minimum near the transition temperature of lattice distortion. The elastic behaviour is discussed on the basis of the so-called ΔE effect due to the displacement of antiferromagnetic domain walls. This effect may possibly be enhanced by the lattice softening in the γ Mn–Ni alloys.View full abstractDownload PDF (888K) -
Yhuzi Furuya, Tadayasu Mitsui1976 Volume 41 Issue 6 Pages 1938-1942
Published: December 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe Hall coefficient, RH, of single crystal and single Q state of pure Cr was measured in magnetic field up to 45 kG at 4.2 K and in higher temperature. In each measurement, anomalous behaviors on RH were found at about 2 and 10 kG, and reversal of the sign of RH from positive to negative was observed below 45 kG at 4.2 K. Remarkable changes of 2 and 10 kG were also found on RH against temperature and these were discussed through magnetic breakdown with the gaps on spin density weve state of Cr.View full abstractDownload PDF (560K) -
Tomoyuki Takeuchi1976 Volume 41 Issue 6 Pages 1943-1949
Published: December 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSLoad-elongation curves of copper single crystals with low-index orientations, deformed with variable extension velocity, were observed in a wide temperature range. The variation of the flow stress after changes in strain rate was analyzed as a superposition of the three processes: (a) effect of discontinuous slip on the primary slip system, (b) thermally activated motion of the secondary dislocations in cell walls, and (c) the variation of the edge dislocation density of the primary slip system in cell walls. The strain-rate sensitivity of the flow stress in mainly caused by the process (b) below 400°C and by the process (c) above 600°C. The particular behaviour observed in the [001] crystals were also discussed.View full abstractDownload PDF (948K) -
Toshinobu Soma1976 Volume 41 Issue 6 Pages 1950-1953
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe valence force model, which is the most significant one of the parameter theories to fit the neutron scattering frequency, is discussed from the view of force constants. Obtained valence force constants are effective only in the valence coordinates and do not give correctly rectangular force constants. Numerical calculations are practised for Si.View full abstractDownload PDF (440K) -
Sadafumi Kanada, Masatoshi Nakayama, Mikio Tsuji1976 Volume 41 Issue 6 Pages 1954-1961
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSNormal modes of the electromagnetic wave propagating along the strip transmission line in magnetic fields are investigated under the local-collisionless approximation to the dielectric function of magnetoplasmas. Modes are classified and the dispersion relation is derived for three configurations of the static external magnetic field: (i) parallel to the wave vector along the line (ii) perpendicular to the surface of the walls (iii) parallel to the surface and perpendicular to the wave vector. Several characteristics of the dispersion are studied. The dispersions are illustrated numerically for n-type InSb.View full abstractDownload PDF (1096K) -
Toshio Ikarashi1976 Volume 41 Issue 6 Pages 1962-1967
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSCoupled modes of surface optical phonons in an ionic crystal and surface plasmons in a semiconductor are studied when the two surfaces are brought close to each other. Dispersion relations of the two coupled modes are derived by making use of local dielectric functions in which the retardation is taken into account. A numerical example is shown for a CsBr–InAs system.View full abstractDownload PDF (668K) -
Toshio Ikeda1976 Volume 41 Issue 6 Pages 1968-1973
Published: December 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe penetration depth of Br2 into KBr crystal is measured in the temperature range from 375°C to 600°C using OH− center as an indicator. The plot of the inverse square of the penetration depth against the inverse pressure of bromine leads to a linear relation indicating that the bromine diffuses in the form of diatomic Br2 molecule. The intercept and the slope of the linear plot permit the evaluation of diffusion coefficient and Henry’s constant of Br2 in KBr: D=0.17exp(−0.95⁄kT) cm2sec−1 and K=7.1×1017exp(−0.43⁄kT) cm−3Torr−1 respectively.View full abstractDownload PDF (760K) -
Hiromu Ueba, Shoji Ichimura1976 Volume 41 Issue 6 Pages 1974-1980
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA theory of surface excitons in molecular crystals is presented using the localized perturbation method. Conditions for the existence of surface excitons and the criterion to determine whether surface exciton states lie above or below bulk exciton states are given in terms of the enviromental shift term and the exciton transfer term within the nearest neighbour approximation. It is shown that localization energies of surface excitons are not sensitive to the crystal thickness. Densities of states for bulk and surface exciton states are calculated. The Davydov splitting of surface excitons is also evaluated.View full abstractDownload PDF (808K) -
Koichi Toyoda, Kaizo Nakamura, Yoshio Nakai1976 Volume 41 Issue 6 Pages 1981-1990
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSLuminescence from KBr containing Na+ ions (3×10−5−9×10−2 mol fraction) is investigated at 10 K either by exciting crystals with the UV light or the F band light in X-rayed crystals. Emission bands related to Na+ ions are identified at 2.72 and 2.90 eV; both of them polarize perpendicular to the VK type molecular axis. Their decay times obtained with an N2 laser excitation are 35 and 24 μs, respectively. It is concluded that the Na emission is π-type emission from a self-trapped exciton, (VK+e)*, perturbed by Na+ ion. Relative intensity of the 2.72 eV band to the 2.90 eV band varies depending upon the excitation energies and the thermal history of X-rayed crystals. This means that at least two types of the VKA center with different thermal stabilities should be assumed.View full abstractDownload PDF (1412K) -
Tadaki Ugumori, Kohzoh Masuda, Susumu Namba1976 Volume 41 Issue 6 Pages 1991-1995
Published: December 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSTwo emission bands are observed in GaSe under N2 laser excitation at 77 K and 4.2 K. The spectral band shapes agree with theoretical curves for an exciton-electron and an exciton-exciton collision processes. Stimulated emission is ascribed to the exciton-exciton collision process. Red shift of the stimulated emission line is explained by reverse absorption of this process.View full abstractDownload PDF (684K) -
Ryohei Nakata, Masamitsu Suzuki, Katsuyasu Kawano, Minoru Sumita1976 Volume 41 Issue 6 Pages 1996-2000
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA new ESR spectrum due to Eu2+ ions was found in additively colored KCl: Eu crystals as well as KOH doped KCl: Eu crystals at room temperature. The angular dependence of the new spectrum has a tetragonal symmetry around [001] axis and could be analyzed by a spin Hamiltonian
(Remark: Graphics omitted.)
with S=7⁄2 and I=5⁄2. The spin Hamiltonian parameters were determined as g=1.995, |b20|=1189(G), b40=−2.3(G), A151=30.1(G) and A153=13.5(G). Both ESR and optical absorption studies suggest that the new Eu2+ complex is originated from the association of the Eu2+ ion with an O2− ion at [001] site which was produced by the decomposition of an OH− ion.View full abstractDownload PDF (712K) -
Michio Midorikawa, Yoshihiro Ishibashi, Yutaka Takagi1976 Volume 41 Issue 6 Pages 2001-2004
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe dilatometric measurements for CsSrCl3 by means of differential transformer, and measurements of pressure dependence of three transition points were carried out. It has turned out that the pressure coefficients of three transition points are 10.1, 11.0 and 9.2 deg/kb. The expressions for spontaneous strains in each phase and for pressure coefficients of the transition temperatures are phenomenologically derived.View full abstractDownload PDF (460K) -
Kiyoyasu Imai1976 Volume 41 Issue 6 Pages 2005-2010
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe thermal dilatations lj (j=1, 2, 3) of Rochelle salt were carefully measured in a temperature range −40°C to +40°C by means of the air-capacitor method. The coefficients of linear thermal expansion exhibit a step-like behavior at both Curie points and their amplitudes agree fairly well with those estimated previously by the thermoelastic effect. The step in volume thermal expansion shows a positive sign at both Curie points. The spontaneous strains were separated from the lj by the method of least squares. The electrostrictive constants Q1j and Q1h (for volume) were obtained and it was found that the Q13 shows an opposite sign to that given by Mason and a considerable temperature dependence which makes the sign of Q1h change in the ferroelectric region.View full abstractDownload PDF (752K) -
Noriyoshi Shibata, Ryuji Abe, Ikuo Suzuki1976 Volume 41 Issue 6 Pages 2011-2019
Published: December 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSFerroelectric phase transition of ammonium sulfate containing a small amount of ammonium selenate was studied by means of ESR. All the lines of the radicals, NH3+ and SeO3−, split discontinuously at the transition temperature (Tc). The analysis of NH3+ spectra showed that the radical rapidly jumped among two equivalent configurations above Tc, while it mainly stayed one of them below Tc. This fact indicates that the NH4+ ion in (NH4)2SO4 undergoes an order-disorder type of transition. Two different species of NH3+ which were respectively located at the non-equivalent sites of NH4+ showed very different temperature dependences below Tc. Furthermore the analysis of SeO3− spectra indicated that SeO42− tetrahedron deformed below Tc. These facts support the proposal by Unruh that there are two or more kinds of dipoles which have different temperature dependence.View full abstractDownload PDF (1076K) -
Yukichi Taji1976 Volume 41 Issue 6 Pages 2020-2026
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSIn non-equilibrium gases of low density, the angular distribution of momentum changes in binary collisions becomes anisotropic. As the result of the biased counteractions, an internal force field is brought forth in the direction depending on the anisotropy. The effect of momentum changes biased from isotropic ones is introduced into the Boltzmann equation, here, as a force field averaged over the distribution function. This average force field complements the rotational invariance in the macroscopic cross section used customarily in the collision term. The equation with the average force field is applied to the neutron transport problem in a medium. The results have shown that the average force field contributes to making the spatial distribution of neutron flux flatter and to growing a new mode which decays more slowly than the fundamental mode.View full abstractDownload PDF (924K) -
Kiyoshi Kawamura, Norio Sato, Toshio Aoki, Takuro Tsuzuku1976 Volume 41 Issue 6 Pages 2027-2029
Published: December 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSIn order to remove the ambiguity of knowledges on the low-field behaviour of Hall coefficient of graphite, a precise measurement has been conducted on well-defined specimens, one of which, the so-called kish graphite, is believed to be of highest quality as compared with those examined in past studies. By using a phase-sensitive detection technique, the measurement has successfully been made at intermediate temperatures between boiling points of liquid coolants, being not troubled by the intervention of thermoelectric voltage. The sensitivity to the presence of lattice defects is concluded to be of much importance in connection with the perturbation of electronic structure.View full abstractDownload PDF (436K) -
Ichiro Watanabe, Yoshihiro Inagaki, Tatsuo Shimizu1976 Volume 41 Issue 6 Pages 2030-2036
Published: December 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSElectrical and optical properties have been studied on Ge0.42 S0.58 glasses containing a series of elements with different valencies. The glass containing a small amount of Cu or Ag brings about a large increase in the d. c. conductivity with a decrease of the activation energy, and brings about a slight decrease of the optical gap and an increase of the steepness of the optical absorption edge. These results are explained by the decrease of a range of the localized states due to a reduction of disorder in the glass-structure. The glasses containing Zn, Cd, Al, In or I have not shown such behaviors. These elements are considered to tend to be incorporated in the glass-network without reducing the disorder in the parent glass.View full abstractDownload PDF (1080K) -
Kenji Hinode, Shoichiro Tanigawa, Masao Doyama1976 Volume 41 Issue 6 Pages 2037-2042
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSPositron lifetime measurements were performed for Cu samples with different densities of lattice defects. The lifetime spectra were successfully resolved into two components with the help of the well established analysis program. Obtained results were quite consistent with those expected from the trapping model. The positron trapping mechanism from free to trapped states and the initial condition of the model were especially checked. Deduced values obtained for τc (lifetime of free positrons) and τt (lifetime of trapped positrons) were 122±5 psec and 176±5 psec, respectively.View full abstractDownload PDF (736K) -
S. V. Moharil, B. T. Deshmukh1976 Volume 41 Issue 6 Pages 2043-2045
Published: December 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSFine powder of NaF was coloured in an electrodeless discharge. Colour centres were studied by measuring the diffused reflectance. It was possible to obtain a large concentration of F aggregate centres. Besides the well known bands at 342 nm and 505 nm corresponding to the F and M centres respectively, two additional absorptions peaking at 440 nm and 630 nm were observed. From bleaching studies they are attributed to excess electron centres. It is shown that their formation is strongly temperature dependent. The band at 440 nm corresponds to the R2 band. To our knowledge no N band has been reported so far in NaF powder. The band at 630 nm is attributed to N centres. An Ivey type relation for the N band peak positions in alkali halides is suggested.View full abstractDownload PDF (432K) -
Takuro Otsuki1976 Volume 41 Issue 6 Pages 2046-2051
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe diffraction of scalar waves by a slit is examined by a method which uses orthogonal functions and Fourier transformations. In the case of perfectly soft screen an exact solution and the far field are obtained. Numerical results of the plane wave transmission coefficients for normal incidence are given for k=0.2∼16, where k is the wave number.View full abstractDownload PDF (412K) -
Minoru Itoh, Toshihisa Tomi-e, Kaizo Nakamura, Yoshio Nakai1976 Volume 41 Issue 6 Pages 2052-2060
Published: December 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSKinetics of the recombination luminescence in potassium halides containing Tl+ has been investigated under UV-irradiation near room temperature. It is found that the luminescence intensity rises slowly to a stationary value with a period of several minutes under steady UV-excitation in the region of the inter-band transition. After reaching saturation, if the crystal is warmed in the dark or irradiated with Xe-light, quenching of the luminescence is observed. These facts indicate the existence of the efficient trapping processes. The quenching experiment reveals that holes and electrons are trapped, forming Tl++ and F-centers, respectively.View full abstractDownload PDF (1176K) -
Seiichi Kagoshima, Takehiko Ishiguro, Hiroyuki Anzai1976 Volume 41 Issue 6 Pages 2061-2071
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSBy the X-ray scattering measurements of TTF–TCNQ, two anomalies at qb=0.29b* and 0.41b* are studied, where qb is the component of the wave vectors of phonons and superstructures along the b*-axis. The anomaly at 0.29b* appears in the TA phonon mode below 150 K and becomes the superstructure below 54 K. The anomaly at 0.41b* appears in the LA phonon mode below room temperature and it also forms the superstructure below 54 K. It is concluded that the wave vector of the modulation of the superstructure at 0.41b* (which is equivalent to 0.59b* in the reduced zone scheme) is twice the wave vector of that at 0.29b* (including the temperature dependent a*-component). Further, it was found that the wave number of the phonon anomaly at 0.41b* varies from 0.41b* to 0.45b* with increasing temperature from 150 K to room temperature.View full abstractDownload PDF (1496K) -
Soji Tsuchiya, Gen Inoue, Yoshikazu Takahashi1976 Volume 41 Issue 6 Pages 2072-2076
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe deactivation rates of CO2 (0001) in H2 and D2 were determined in the temperature range of 300∼150 K from the observed decay of the 4.3 μm fluorescence which was induced by the HBr laser pulse, The rate in H2 below room temperature is slightly smaller than that extrapolated form the high temperature data assuming the temperature dependence of the Landau-Teller type. Contrary to this, a decreasing temperature dependence was found for the rate in D2 at lower temperatures. The calculation of energy transfer probabilities based on the long range multipole interaction between CO2 (0001) and H2 suggests a contribution of the vibration-to-rotation energy transfer: CO2 (0001)+H2 (ν=0, J=2 or 3)→ CO2 (1000 or 0200)+H2 (ν=0, J=4 or 5).View full abstractDownload PDF (644K) -
Shozo Tsunekawa1976 Volume 41 Issue 6 Pages 2077-2083
Published: December 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe microwave spectrum of deuterated hydrazine has been investigated in the frequency range of 8–105 GHz. There are three species for hydrazine-1,2-d2 and the rotational constants are determined to be A=102309.0 MHz, B=21306.7 MHz and C=20356.5 MHz, A=100173.8 MHz, B=20930.5 MHz and C=20843.6 MHz and A=98246.3 MHz, B=21529.1 MHz and C=20404.8 MHz. From the Stark effect of low-J lines the dipole moment is found to be 1.90 D. the structural parameters of hydrazine are obtained using the rotational constants of deuterated species to be N–H=1.008±0.008 Å, N–N=1.447±0.005 Å, ∠HNH=113°16′±3°, ∠NNH=109°09′±50′ and dihedral angle between the two amino groups =88°55′±1.5°.View full abstractDownload PDF (756K) -
Shinobu Nakazaki1976 Volume 41 Issue 6 Pages 2084-2090
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSBy use of the non-relativistic Coulomb-Born approximation, calculations have been performed for cross sections of electron-impact excitation in helium-like ions (C, V, N, VI, O VII and Ne IX) in the cases of 11S→n1P (n=2, 3), 23S→n3P (n=2, 3) and 23P→33S transitions. In view of the application to high-temperature plasmas the cross sections for respective ions have been obtained at impact electron energies from threshold to 20 keV for 11S→n1P, to 1 keV for 23S→23P and to 2 keV for 23S→33P and 23P→33S.View full abstractDownload PDF (932K) -
Kiyoji Nakamura1976 Volume 41 Issue 6 Pages 2091-2094
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe principles of linear irreversible thermodynamics have been used for viscoelastic non-aging materials. An extension to aging materials is carried out using integro-differential operators for linear viscoelasticity. The equations of motion in terms of generalized coordinates and forces are derived for aging systems in the neighborhood of a stable equilibrium state and the symmetry of phenomenological constants is obtained for anisotropic aging materials.View full abstractDownload PDF (464K) -
Yoshitsugu Oono1976 Volume 41 Issue 6 Pages 2095-2097
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA heuristic approach to the excluded-volume problem of a polymer chain is given. The universality of the exponent for the mean square end-to-end distance is also intuitively explained. The approach is closely related to Imry’s interdimensional scaling theory, but does not utilize the polymer-magnet analogy due to de Gennes.View full abstractDownload PDF (380K) -
Haruichi Washimi1976 Volume 41 Issue 6 Pages 2098-2104
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe multi-dimensional wave equations for the waves propagating along a magnetic field in an inhomogeneous plasma are derived and the wave-trapping is discussed. It is shown that the wave equations are reduced to the Schrödinger-type ones in which the sign of the coefficient of the second derivative depends on (ψ⁄θ)θ=0 where ψ is the angle between the field line and the ray, and θ is the angle between the field line and the wave normal. The physical reason of the wave trapping is explained by comparing the sign of (ψ⁄θ)θ=0 with that of the effective potential in the wave equation. As an example, the wave trapping of the whistler wave in geo-magnetosphere is considered.View full abstractDownload PDF (736K) -
Takashi Ikuta1976 Volume 41 Issue 6 Pages 2105-2113
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe present paper investigates weakly nonlinear, dissipative and dispersive hydromagnetic waves of small but finite amplitudes standing or slowly propagating in the aligned-(parallel-)transverse flow, which consists of a two-dimensional aligned flow with superposed third components of flow-velocity and magnetic field. The two-fluid plasma model is used. In a certain range of the flow-velocity the system of equations in the ideal limit becomes spatially hyperbolic, and for the specific ranges the system is reduced by means of the reductive perturbation method to the Korteweg-de Vries Burgers equation which describes slow two-dimensional spatial variation and slower temporal change. Shock-like and solitary wave solutions are obtained even without the time-dependence, and conspicuous properties of those solutions are exhibited.View full abstractDownload PDF (1200K) -
Koji Mio, Tatsuki Ogino, Susumu Takeda1976 Volume 41 Issue 6 Pages 2114-2120
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA procedure to the coordinate stretching and the perturbation expansion for the reductive perturbation method is proposed to analyze the nonlinear wave behaviors in dispersive medium. The method is applied to the nonlinear Alfvén wave propagating in an oblique direction to the static magnetic field in cold plasmas. Although the wave is described by a linear equation for some physical quantities, the nonlinearity appears in the relation among the other quantities for considerably large amplitude. These outstanding features are much different from other waves in plasmas.View full abstractDownload PDF (872K) -
Hiroyuki Honji, Masakazu Tatsuno1976 Volume 41 Issue 6 Pages 2121-2125
Published: December 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSUnsteady motions of vortex rings in a stably stratified fluid, of which the density profile has a gradual step change, have been observed using an electrolytic flow visualization technique. Some new types of distorted vortex rings wave observed to from in the nonhomogeneous fluid.View full abstractDownload PDF (1964K) -
Ikuo Ono1976 Volume 41 Issue 6 Pages 2127-2128
Published: December 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSA Bethe approximation for the phase transition in a quenched random Ising lattice is developed on the basis of the ordered phases with non-periodic spin arrangements. Mixtures of ferro and antiferromagnetic interactions are specially interested. The effects due to the interaction loops, which are characteristic to a ordinary lattice in contrast to a cayley tree on the transition temperature are stressed. Matsubara and Sakata’s results are critically compared with ours.View full abstractDownload PDF (300K) -
Ikuo Ono1976 Volume 41 Issue 6 Pages 2129-2130
Published: December 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSA phase transition in a quenched ferro- and antiferromagnetic Ising mixture on an infinite triangular Cactus tree is rigorously studied. The non-periodic ordered phase which is specified by the “phase indicator” is determined so as to exhibit the highest transition temperature. This phase is intimately associated with the ground-state spin arrangement. The critical concentration below which the magnetization should disappear at the absolute zero is also derived.View full abstractDownload PDF (284K) -
Hisao Okamoto, Katsuhiko Nagano, Tahashi Karasudani1976 Volume 41 Issue 6 Pages 2131-2132
Published: December 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe free energy, susceptibility and correlation functions for a linear chain of N+1 spins with unequal nearest-neighbor isotropic Heisenberg couplings due to two unlike spins randomly distributed on the chain are calculated explicitly in the (classical) limit of infinite spin. The temperature and concentration dependence of susceptibility are given in comparison with that for one-component systems.View full abstractDownload PDF (224K)