Journal of the Physical Society of Japan
Online ISSN : 1347-4073
Print ISSN : 0031-9015
ISSN-L : 0031-9015
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Volume 30, Issue 4
Displaying 1-50 of 60 articles from this issue
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  • Gamma-Ray Spectroscopy of 76As
    Katsuyuki Iizawa, Isao Kitamura, Kiyoshi Kawade, Hiroshi Yamamoto, Kan ...
    1971 Volume 30 Issue 4 Pages 901-909
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.901
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    Decay of 76As was investigated by using a Ge(Li) detector and Ge(Li)–NaI(Tl) coincidence methods. Sixteen new gamma-rays were observed and eleven of them were assigned in a proposed decay scheme. Four new levels were found at 2026.4, 2348, 2365.1 and 2514 keV. Spins and parities of levels at 2026.4, 2655.7 and 2669.8 keV were estimated from log ft values of beta transitions which fed these levels. Existences of 563.4 and 772.1 keV gamma-rays emitted from the 0+ and 4+ levels which were considered to be levels of two-phonon triplet states and observed by the coulomb excitation and the inelastic scattering experiments were confirmed. Characters of the 1691.5 and 1788.1 keV levels as three phonon states were discussed.
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  • Elastic Scattering of Carbon and Nitrogen Ions
    Isao Kohno, Shyunji Nakajima, Tadao Tonuma, Masatoshi Odera
    1971 Volume 30 Issue 4 Pages 910-918
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.910
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    Elastic scatterings of 14N and 12C particles from 12C, 27Al, 28Si and 58Ni at energies from 65 to 88 MeV with 14N projectile and at 49.3 to 83.5 MeV with 12C have been studied. Angular distributions of these elastic scatterings were measured at laboratory angles extending from 7 to 35 degree at 1 or 1.5 degree intervals, and the results changed with the values of coulomb parameters (η) regardless of the target and projectile combination. These various angular distributions were analyzed with the optical model of Wood-Saxon potential, and were fitted very well with the real potential depth of 50 to 70 MeV and the geometrical parameters similar to those found in the 3He and α particles’ elastic scatterings.
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  • The Decay of 134Cs
    S. P. Sud, P. N. Trehan
    1971 Volume 30 Issue 4 Pages 919-922
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.919
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    The decay of 134Cs has been investigated by using single crystal, γ-γ coincidence, sum-peak coincidence and γ-γ angular correlation techniques. There is no evidence for the 1580 keV level proposed by Nagpal. The directional correlation measurements of the 1038–605 keV cascade favours 3+ spin assignment for the 1643 keV level of 134Ba.
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  • Decay of 14 min 112In
    Shinjiro Itagaki, Yasushi Takeda, Kazusuke Sugiyama
    1971 Volume 30 Issue 4 Pages 923-926
    Published: April 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.923
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    The gamma rays following the decay of 14 min 112In have been studied with a 24 cc Ge(Li) detector. The energies and relative intensities of the gamma rays are; 606.4±0.5 keV (23.4%), 618.2±0.4 keV (100.0%), 1252.6±0.9 keV (5.6%), 1278.0±1.4 keV (0.2%), 1306.3±1.7 keV (0.1%) and 1488.9±1.3 keV (1.2%). The excited levels of 112Cd at 618 keV, 1225 keV, 1306 keV, 1489 keV, 1871 keV and 2503 keV are considered to be 2+, 0+, 2+, 2+, 0+, and 2+, respectively. The population of the 1225 keV 0+ state by beta feeding has also been discussed.
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  • Calculation of Kinetic Energy and Most-Probable Charge in Fission
    Hironobu Okamoto, Hiromichi Nakahara, Tomota Nishi
    1971 Volume 30 Issue 4 Pages 927-931
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.927
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    Kinetic energies and most-probable charges in fission were calculated for 235U+n, 252Cf and 226Ra+p by applying the statistical model by Fong. The mass formula by Myers and Swiatecki was employed to evaluate fragment deformation energies. The most-probable scission configuration for a given mass division was obtained by maximizing the effective intrinsic excitation energy of the complementary fragments which was given as a function of their charges and deformation parameters. The general trends of the kinetic energy distribution and the charge distribution in fission could be reproduced fairly well.
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  • Remarks on the Isotopic Volume Effect in Superconductors
    Tetsuo Nakajima
    1971 Volume 30 Issue 4 Pages 932-940
    Published: April 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.932
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    One possible manner in which the change in isotopic volume contributes to the isotope effect in superconductors is discussed with relation to the empirical formula of Olsen et al., α=0.25+0.1φ, which represents a relation between the exponent α in Tc∝M−α and the volume dependence of the transition temperature, φ=∂ ln [Tc⁄θ]⁄∂ ln V·{ln (0.85θ⁄Tc)}−1. Here, the volume effect being taken into consideration, α is expressed in terms of the mass and volume effects of the Debye temperature θ and those of the phonon mediated electron-electron interaction N(0)J in the BCS relation. In addition to this, the limitations of the argument concerning the relation between the isotope effect and the volume dependence of the transition temperature are briefly examined in connection with the isotopic volume in some isotopic compounds.
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  • Electrical Conduction in a Narrow Band. III. Green Function Method
    Nagao Ohata
    1971 Volume 30 Issue 4 Pages 941-956
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.941
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    The mobility problem of a hole in a narrow s-band is studied from the point of view of the scattering theory on the basis of the Hubbard model. This formalism is appropriate when the spins are almost aligned. In order to extrapolate the results obtained in the case of almost aligned spins to highly disordered states of spins, the Green function technique is introduced. The frequency-dependent conductivity is expressed in terms of the Fourier transform of a retarded Green function. The Green function is calculated by the use of the equation of motion method. Like Hubbard’s third paper, decoupling approximations are made so as to include the effects of spin disorder and those of the motion of electrons. The dependence of the hole mobility on the spin ordering, which was found in a previous paper, is reproduced.
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  • Formulas for the Lattice Green’s Functions for the Cubic Lattices in Terms of the Complete Elliptic Integral
    Tohru Morita, Tsuyoshi Horiguchi
    1971 Volume 30 Issue 4 Pages 957-964
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.957
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    It is shown that the standard formulas of reducing elliptic integrals to the normal forms are useful in expressing the lattice Green’s functions for the cubic lattices as a sum of simple integrals of the complete elliptic integrals.
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  • Josephson Junctions with Superconducting Barriers
    Kaoru Yamafuji, Tadao Ezaki, Teruo Matsushita
    1971 Volume 30 Issue 4 Pages 965-971
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.965
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    Dc characteristics of Josephson junctions with thin super-conducting barriers are discussed with the aid of the Ginzburg-Landau equations. The main difference of the present junctions from the Josephson junctions proposed so far lies in the fact that the barrier is composed of a thin superconductor in the superconducting state. It is shown that maximum dc current densities of present junctions can be at most 105 times of those of typical Josephson junctions with dielectric barriers. The oscillating powers of present elements are expected to be greatly increased from those of typical Josephson oscillators.
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  • Galvanomagnetic Effects in Impurity Band Conductions
    Hiroyuki Shiba, Kunihiko Kanada, Hiroshi Hasegawa, Hidetoshi Fukuyama
    1971 Volume 30 Issue 4 Pages 972-987
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.972
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    Previous theories of impurity bands in a magnetic field by the authors are extended to give a full account of the galvanomagnetic transport coefficients for the system so far introduced. The formulas for three basic components of the conductivity tensor σxx, σxy and σzz derived here are such that (1) single-site scatterings are taken into account in the one-particle and two-particle Green functions all the way self-consistently, (2) they are applicable both to the intrinsic band and the impurity band simultaneously, and (3) they are applicable to any magnetic field strength. One characteristic point clarified is a reduction of the high-field Hall conductivity σxy in the impurity band region, reflecting a localized nature of the impurity band electrons. This fact is demonstrated by performing an integration involving the Fermistatistics in the expressions of the conductivities and comparing the temperature dependence of σxy with that of σxx. This provides a clear-cut theoretical confirmation that the high-field galvanomagnetic effects is InSb reported by Miyazawa (J. Phys. Soc. Japan 26 (1969), 700) is in fact originated in the proposed impurity band conduction.
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  • Critical Behavior of the Spin System with Anisotropic Exchange Interactions. I.
    Takehiko Oguchi
    1971 Volume 30 Issue 4 Pages 988-994
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.988
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    The spin system described by the Hamiltonian
    (Remark: Graphics omitted.),
    is investigated by the three different methods: the effective Hamiltonian method, the spin wave theory, and the Green function method. The system is reduced to the Ising model when ξ=η=0, the Heisenberg model when ξ=η=1, and XY model when ξ=1, η=0, respectively. The variation of the Curie point Tc with ξ and η is determined for the two- and three-dimensional lattices. In the three-dimensional lattice, Tc of the XY model lies between those of the Ising and Heisenberg model. On the other hand, in the two-dimensional lattice, the spontaneous magnetization is absent in the XY model and Heisenberg model and further the model intermediate between them.
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  • A Calculation of Transport Properties of Liquid Mercury Alloys on the Basis of Ziman’s Theory
    Takashi Takeuchi
    1971 Volume 30 Issue 4 Pages 995-1006
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.995
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    A calculation of electrical resistivity and of thermoelectric power has been made for thirteen liquid systems of mercury alloys, The pseudo-potential from factors by Animalu-Heine were employed for all the elements except for mercury. The form factor for mercury was modified to give a good agreement between the calculated and the experimental values of the resistivity. The partial structure factors were assumed to be independent of concentration and the extremum points of the unlike-pair structure factors are given to be simple mean values of those of the corresponding like-pair structure factors obtained by x-ray or neutron experiments .The calculated value of the resistivity agrees well qualitatively with the experimental one, although agreement is not very good in the thermoelectric power.
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  • Tunneling through Band Tail States
    Nobuhiko Sawaki, Akira Yoshida, Tetsuya Arizumi
    1971 Volume 30 Issue 4 Pages 1007-1014
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1007
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    On the basis of the one electron wave function for the impure semiconductor obtained by using the diagram perturbation method, the tunneling current it a model p-n junction is analyzed in the framework of Conley, Duke, Mahan, and Tiemann. The expression contains the density of states factor explicitly and a method of determining the density of states tail through tunneling measurements is given. An example is shown on the state density of the (000) valley of germanium.
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  • Lattice Dynamics and Thermodynamic Properties of β-ZnS, GaP and β-SiC
    R. Banerjee, Y. P. Varshni
    1971 Volume 30 Issue 4 Pages 1015-1021
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1015
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    The lattice dynamics of β-ZnS, GaP and β-SiC has been investigated on the basis of a rigid ion model with seven parameters. Results are obtained for the dispersion curves and effective calorimetric and X-ray Debye temperatures and are shown to compare favourably with the available experimental data. Calculated values of equivalent Debye frequencies are also reported.
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  • A Molecular Theory of the Thermal Transitions of Polymers. I.
    Takao Ishinabe
    1971 Volume 30 Issue 4 Pages 1022-1028
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1022
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    A molecular theory is developed in order to elucidate the nature of melting and glass transition of polymers. Rotational oscillations of chain units around chain axis are considered. It is assumed that the units of trans linkage have a sinusoidal interchain potential field in a hexagonal lattice but for gauche the potential field has not such sinusoidal form. The lattice energy is calculated by summing up the Lennard-Jones type pair interactions between units. A critical temperature for the transition between uniform and non-uniform rotational orientations of units is obtained for crystalline or glassy state on the basis of molecular field approximation. Melting temperature (Tm) and glass temperature (Tg) can be predicted from it and the empirically known correlation between Tm and Tg is well explained. The results are in good agreement with the experimental data on polyethylene.
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  • A Molecular Theory of the Thermal Transitions of Polymers. II.
    Takao Ishinabe
    1971 Volume 30 Issue 4 Pages 1029-1035
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1029
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    A lattice theory is developed for melting and glass transition of polymers. Each chain segment is assumed to occupy a site on a hexagonal lattice. A polymer chain in crystalline state exists in an extended form with trans conformation. In molten or rubbery state holes are formed in the lattice and the chain becomes flexible having the mixed forms of trans and gauche; in glassy state the chain conformations are frozen in. The partition functions are set up. The equations to give melting temperature and glass transition temperature are derived from them with appropriate criteria for these transitions. Variations of thermodynamic properties at the transition points are also evaluated; the Prigogine-Defay relation is obtained. The results of the theory fairly agree with the available experimental data on polyethylene.
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  • Study of the Dipolar Relaxation by a Continued Fraction Representation of the Time-Correlation Function
    Kaoru Kometani, Hiroshi Shimizu
    1971 Volume 30 Issue 4 Pages 1036-1048
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1036
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    The dipolar relaxation is discussed by a continued fraction representation of time-correlation function. A particular attention is given to stochastic processes in the liquid state where the molecular Brownian motion is in the vicinity of the Markovian process. It is shown that the correlation or relaxation time of such interesting dynamical variables as angular momentum, torque, and kinetic energy can be estimated from the moments of infrared absorption spectra. Useful discussions are given to make the relation between the dipolar relaxation and the time dependence of these dynamical variables clear.
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  • On the Spin Arrangement in “Kagome” Lattice of Antiferromagnetic KFe3(OH)6(SO4)2
    Mikio Takano, Teruya Shinjo, Toshio Takada
    1971 Volume 30 Issue 4 Pages 1049-1053
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1049
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    Experimental results showed that KFe3(OH)6(SO4)2 is antiferromagnetic below 60°K and in each crystal c-plane, Fe ions form a compensated antiferromagnet. The crystal structure of Fe ions in the c-plane is a “kagome” lattice and it has been known that collinear antiferromagnetic spin arrangements are not stable in the kagome lattice. An estimation of the spin structure was attempted with the analysis of the Mössbauer spectrum and a kind of triangular configuration was suggested.
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  • Specific Heat of Ni(NH3)2Ni(CN)4·2C6H6 at Low Temperature
    Shoichi Nagata, Tsuyoshi Maruyamauchi, Takashi Watanabe
    1971 Volume 30 Issue 4 Pages 1054-1058
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1054
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    The hear capacity Cp of powdered specimen of Ni(NH3)2·Ni(CN)4·2C6H6 has been measured between 1.3 and 10°K. A sharp λ-shaped anomaly for antiferromagnetic phase change has been found at 2.39±0.01°K. The total entropy change which was measured is 15.91 (J/mol°K), but total magnetic ordering entropy is R ln (2S+1)=9.13 (J/mol°K) with S=1 for ground state of nickel ion. The excess entropy is assumed to be due to the hindered rotations of NH3 group. The low temperature asymptotic form for the heat capacity is Cp∝1⁄T2e−Δ⁄T, where the amount of magnetic elementary excitation energy Δ is 8.85°K.
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  • Rotating-Frame Nuclear-Double-Resonance in NaCl: Spin-Calorimetry and Multiple-Spin-Flips
    Masakazu Kunitomo
    1971 Volume 30 Issue 4 Pages 1059-1067
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1059
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    An experiment of the nuclear double resonance in the rotating frame is carried out on Na23–Cl35 system in a single crystal of NaCl. The double resonance signals caused by one sodium spin flip accompanied by two chlorine flips, and by one chlorine flip accompanied by two sodium flips are observed, in addition to the ordinary signals caused by one sodium and one chlorine flips. The experimental results are analyzed from the viewpoint of thermodynamics (spin-calorimetry) and an effect of Cl35 spin-lattice relaxation on the double resonance is taken into account. The spin-lattice relaxation time of Cl35 is measured indirectly by using the double resonance spectrum obtained. In addition, a sensitive technique, available in the NMR experiments in solids, is developed to adjust a static field to a resonant value for a given rf frequency.
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  • Calculation of the Spin Wave Energy of Iron, Cobalt and Nickel
    Shinya Wakoh
    1971 Volume 30 Issue 4 Pages 1068-1075
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1068
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    The spin wave energies for iron, cobalt and nickel are computed in the long wave length limit and in the random phase approximation, using the results of band structure calculations. The energy expression and the criterion for the stability of the ferromagnetic ground state are give in terms of a function M(ε), a surface integral involving the gradient of the single particle energy. The results obtained indicate the possible importance of the s-p band in stabilizing the ferromagnetic ground state. Agreement with experimental values of the spin wave energy is very good for nickel, but for cobalt and iron the calculated values are much smaller than those observed.
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  • The Surface Potential of Carbon Monoxide on the Single Crystal Surfaces of Tungsten
    Seiji Usami
    1971 Volume 30 Issue 4 Pages 1076-1082
    Published: April 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1076
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    The surface potential (s.p.) of CO adsorbed at room temperature on the (110) and (111) single crystal surfaces of tungsten is determined to be 0.45±0.03 eV and 0.80±0.03 eV respectively using the Kelvin technique. At an exposure of about 10−5 Torr.s, the s.p. tends to a steady value, which depends slightly on the CO pressure. It is shown that the usual expression for the number of molecules incident on unit area of a surface, N=3.51×1022P(Torr)·τ(sec)⁄(MTk)1⁄2, is inapplicable to a surface very close to another one. Taking this into account, previous results on the (100) and (112) tungsten surfaces, Supplemento al Nuovo Cimento 5 (1967) 535, have been recalculated. Flash desorption for the (111) crystal displays three peaks at 810°K, 1070°K, 1240°K.
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  • Flux Flow as a Function of Film Thickness in Type I Superconductor
    Tetsunobu Takayama, Tetsuya \={O}gushi, Yoshio Shibuya
    1971 Volume 30 Issue 4 Pages 1083-1090
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1083
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    The flux flow in type I superconducting Pb film was measured as a function of film thickness. The vortex state is stable in the films perpendicular to the magnetic field, provided the films are thinner than the critical thickness dc which is about 9,000 Å at 4.2°K, while the theoretically predicted one is about 2,200 Å. The flux flow pattern changes gradually with the change of film thickness around dc. The flow resistivity of the films the thickness of which is thinner than dc is nearly linear against the magnetic field H for H⁄Hc⊥>0.5. On the other hand the I–V plots in perpendicular field for films much thicker than dc start from the origin and show characteristic “knick” at certain values of current in weak fields. This result can be explained by assuming that in strong fields these films have an effective laminar structure and in weak fields they have a bundle structure in addition to an effective laminar structure. The experimental results are consistent with those of Van Gurp by a different method of measurement i.e. the flux-flow noise measurement.
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  • Recovery of Low-Temperature Fast Neutron Irradiated Tungsten
    Saburo Takamura, Reimon Hanada, Shigeo Okuda, Hiroshi Kimura
    1971 Volume 30 Issue 4 Pages 1091-1095
    Published: April 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1091
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    The recovery after fast neutron irradiation at about 10°K of W with various treatments is investigated by electrical resistivity measurements and the recovery structure is determined from 15°K to 420°K. The stage I below 90°K of W consists of at least five substages after fast neutron irradiation. Radiation doping enhances the amount of recovery in stages I and II. In W, the effect of doping does not vanish when doped specimen is annealed at 400°C, where stage III is completed. This is contrast with Mo where the enhancement vanishes when doped specimen is annealed above stage III.
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  • Color Centers in MgO: Ni Induced by Neutron Irradiation
    Moritami Okada, Masuo Nakagawa, Kozo Atobe, Toshikazu Shibata
    1971 Volume 30 Issue 4 Pages 1096-1100
    Published: April 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1096
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    New absorption bands at 365 and 460 nm are introduced in Ni doped MgO single crystals irradiated by reactor neutrons. The 365 and 460 nm band intensities increase proportionally with neutron dose and connected intimately with the quantity of doped Ni ions. It is suggested to assign the 365 and 460 nm bands to the Ni ion center associated with a vacancy or an irradiation defect in the MgO crystal.
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  • Drift Mobilities of Electrons and Holes in Thallous Bromide
    Takao Kawai, Koichi Kobayashi, Mihoko Kurita, Yunosuke Makita
    1971 Volume 30 Issue 4 Pages 1101-1105
    Published: April 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1101
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    Drift mobilities of electrons and holes in TlBr have been measured below and above the Debye temperature of LO-phonons by a transit time technique. They are compared with finite temperature polaron mobility theories. Rather satisfactory agreement between the experiment and the theory is obtained in electron polarons. The temperature dependence of measured hole polaron mobillity is quite different from what is expected from the theory.
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  • Role of Ionic Processes in the Electrolytic Coloration of KBr and KI
    N. Paramo, C. Sanchez
    1971 Volume 30 Issue 4 Pages 1106-1112
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1106
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    The possibility that electrolytic coloration of alkali halides be due to electron injection from an alkali metal cathode, formed by ionic transport taking place in the sample prior to electrolytic coloration, has been investigated. The following results have been obtained: On heating the samples from room temperature, the coloration starts at a fixed temperature which is a function of the applied voltage. The relation between that temperature and the applied voltage has been discussed on the light of ionic conductivity mechanisms and it appears to be consistent with the formation of a new alkali metal cathode. The cation vacancy migration seems to play the main role in this process. Furthermore, the increase of the electrical current through the sample at the coloration outset can be explained as due to thermoionic emission from an alkali metal cathode.
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  • Electro- and Thermo-Reflectance of Lead Selenide Single Crystal
    Taneo Nishino, Hisahito Ogawa, Yoshihiro Hamakawa
    1971 Volume 30 Issue 4 Pages 1113-1117
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1113
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    The electroreflectance and thermoreflectance spectra of PbSe single crystal have been measured in the visible light region. From the analysis of the structures in both two spectra in terms of the electro- and thermo-optical theory, the energies of transitions of Σ5(6)−Σ5(5), L6−(7)−L6+(5), L6−(6)−L45+(4) and Δ6(6)−Δ6(5) are determined to be 1.53, 1.75, 1.93 and 3 eV, respectively.
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  • Temperature Dependence of the Fundamental Optical Absorption Edge in Stannic Oxide
    Masahiro Nagasawa, Shigeo Shionoya
    1971 Volume 30 Issue 4 Pages 1118-1123
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1118
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    The anisotropic fundamental absorption edge spectra edge spectra of SnO2 have been studied in a temperature range from 7 to 350°K. The spectra are quite different in the energy of absorption edge, in shape and also in temperature dependence for two polarized lights (E⊥c and E⁄⁄c). Two direct edges are observed for light E⊥c; at low temperatures, the spectra begin with second class exciton transitions at Γ-point, while at high temperatures, the spectra are interpreted in terms of Urbach’s rule, and are assumed to arise from transitions from the second valence band to the lowest conduction band at Γ-point. For light E⁄⁄c, it was found that (absorption coefficient)2⁄7 is proportional to photon energy for the whole temperature range investigated, and that the shape of the spectra shows only slight temperature dependence. A possible explanation that the spectra arise from “fourth class” direct trantions at Γ-point is discussed.
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  • Luminescence of KI Containing ns2 Configuration Ions under Excitation by Exciton Absorption
    Taibun Kamejima, Shigeo Shionoya, Atsuo Fukuda
    1971 Volume 30 Issue 4 Pages 1124-1131
    Published: April 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1124
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    As to KI crystals containning Ga+, In+, Tl+ or Sn2+ ions, excitations spectra for the A band emission and emission spectra excited by light of the first exciton absorption band were studied, in order to investigate whether energy is transported to these ions due to exciton diffusion. In the case of Ga+, In+ and Tl+ ions, energy transfer from excitons does not take place. In the case of Sn2+ ion, the low energy band of the intrinsic luminescence is over lapped with the A absorption band, and consequently nonradiative resonance energy transfer takes place from the emitting state of the intrinsic luminescence, in addition to radiative transfer due to the reabsorption effect. It is concluded that energy transfer from excitons is effective only for the resonance type an energy transport due to exciton diffusion does not occur in alkali halides.
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  • The Compton Profile of MgO
    Sen’ichi Togawa, Osmo Inkinen, Seppo Manninen
    1971 Volume 30 Issue 4 Pages 1132-1135
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1132
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    The Compton profile of polycrystalline MgO has been measured with MoKα X-rays scattered through 121°. The results obtained were compared with the profiles based on a superposition of Mg2+ and O2− ions. For Mg2+, Hartree-Fock free-ion wave functions were used, and the outer electrons in O2− were described by four sets of theoretical wave functions. The experimental results were in good agreement with the profile calculated from crystalline-field wave functions of O2−, whereas the models of fictitiously stabilized O2− ions proved to contain too much low momentum.
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  • X-Ray Crystal Collimators Using Successive Asymmetric Diffractions and Their Applications to Measurements of Diffraction Curves. III. Type II Collimator
    Tadashi Matsushita, Seishi Kikuta, Kazutake Kohra
    1971 Volume 30 Issue 4 Pages 1136-1144
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1136
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    New type monolithic crystal collimators for 422 and 511 reflections of CuKα1 using successive asymmetric diffractions are constructed and applied to precise measurements of diffraction curves from silicon crystals with a double-crystal diffractometer of parallel setting. The collimator consists of two crystal components and the second component is rotated to eliminate the deviation of the beam direction from the diffraction condition for second component, which is caused by refraction. Thus he beam intensity obtained for 422 becomes 35 times stronger than the case where the second component is not rotated. The angular spreads of the beams obtained are 0.10″ for 422 and 0.07″ for 511. For the symmetric Bragg-case diffractions, the observed (calculated) half-value widths and reflection percents are 2.944″±0.004″ (2.946″) and 94% (94.7%) for 422, and 1.998″±0.003″ (2.000″) and 87% (88.4%) for 333, respectively.
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  • Microwave Spectrum of Methylamine
    Kojiro Takagi, Takeshi Kojima
    1971 Volume 30 Issue 4 Pages 1145-1157
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1145
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    Microwave spectra of CH3NH2 and CH3ND2 were observed mainly in the 20 to 60 GHz region, and were analyzed by the internal axis method. The spectrum of CD3ND2 observed by Lide was reanalyzed. Rotational terms, internal rotation terms and inversion terms were determined and the inertia constants including Iα were given for each molecule. The barriers to internal rotation are 684.1 cm−1, 678.7 cm−1 for CH3NH2, CH3ND2 and CD3ND2 respectively. Dipole moment and quadrupole coupling constants of CH3ND2 were determined.
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  • Total Cross-Sections for Dipole-Dipole Scattering by Using Effectively Spherically Symmetric Potentials
    T. K. Rai Dastidar, Evelyn Guha, P. K. Bhattacharyya, A. K. Barua
    1971 Volume 30 Issue 4 Pages 1158-1165
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1158
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    Generalised calculations of total scattering cross-sections for scattering between dipolar molecules have been made in terms of the resonance and Keesom approximations which reduce the problem effectively to that of an elastic one. For the resonance approximation, the cross-sections were computed by phase shift analysis assuming a fixed relative orientation between the two dipoles and subsequently averaging over all angles, and Schiff-Landau-Lifshitz approximation was used for the Keesom potential. A comparison with experimental cross-sections indicate that for collisions far off resonance, the observed values agree well with the Keesom cross-section, while the agreement with the resonance approximation is poor. However, for cases will higher probability of resonance collision the resonance approximation is likely to give better agreement with the observed values than for off-resonance cases.
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  • Exp : Exp Potential Parameters for Neon, Oxygen and Nitrogen
    V. K. Dixit, M. N. Sharma
    1971 Volume 30 Issue 4 Pages 1166-1168
    Published: April 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1166
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    The potential parameters of the exp : exp potential energy function have been determined utilizing the temperature dependence of thermal diffusion data for Neon, Oxygen and Nitrogen. The correctness of these values of potential parameters have been justified by computing the other transport properties of these gases. The coefficient of viscosity η and the coefficient of self-diffusion D have been computed in the case of Neon. For oxygen and Nitrogen the values of coefficient of self diffusion at different temperatures have been computed. The theoretical values of coefficient of viscosity and coefficient of self diffusion compare well with the experimental values. Furthermore the present parameters are more accurate than parameters evaluated, using the viscosity, virial and crystal properties.
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  • Nonlinear Interaction of Bernstein Waves in a Beam-Plasma System
    Toshitaka Idehara, Kunizo Ohkubo, Shigetoshi Tanaka
    1971 Volume 30 Issue 4 Pages 1169-1177
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1169
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    Bernstein waves (Electron Cyclotron Harmonic Waves) are observed to excite and grow exponentially in distance up to saturation levels, and then damp slowly when a gyrating electron beam is injected into a plasma in a thermal equilibrium. As the beam becomes intense, there appear the harmonics of the Bernstein waves ascribed to a nonlinear interaction of these waves. In accordance with an increase of the emission power of harmonics, widths of these harmonics become broad and then their spectra become continuous, showing that they resemble closely the turbulence spectra.
    The experimentally observed characteristics of the Bernstein waves are very similar with those of Landau waves and have close correlations with the beam-plasma discharge.
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  • Energy Flow in the Collision of Two Plasma Streams
    Yasumasa Takeda
    1971 Volume 30 Issue 4 Pages 1178-1187
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1178
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    The axial distribution of transverse energy density during the collision of two plasma streams was measured by means of four magnetic loops arranged axially in the region of a guide field.
    The transverse energy density has the maximum, 4×1015 eV/cm3, in the midplane which is about five times larger than that of a one-sided plasma stream. The transverse energy density in the midplane decreases typically by a factor of 4 in 20-μ sec, and the axial distribution is flattened out.
    It is not possible to account for this rapid decay of plasma diamagnetism quantitatively by the adiabatic expansion model developed by F. Waelbroeck et al.
    A simple model of axial thermal conduction is developed in which the energy is transported to cold plasma regions through shock fronts.
    Predictions of the model concerning the variation of plasma diamagnetism indicate that energy flow due to parallel thermal conduction cannot be excluded.
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  • Ion Waves in a Weakly Ionized Plasma
    Mamoru Tanibayashi
    1971 Volume 30 Issue 4 Pages 1188-1193
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1188
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    The character of the propagation of ion waves in a weakly ionized plasma is studied experimentally. Ion waves are found to be waves of diffusion type, when the exciting frequency is lower than collision frequency between ions and neutral atoms, and otherwise, ion waves are acoustic waves. Form the waves of diffusion type, the diffusion coefficients are obtained, which are nearly equal to the values obtained by others.
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  • Note on the Half-life of the 3− Octupole Level in 82140Ce58
    G. Ardisson, C. Marsol
    1971 Volume 30 Issue 4 Pages 1194
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1194
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  • The Interaction Mean Free Path of α-Particles in Nuclear Emulsion
    Takeshi Saito
    1971 Volume 30 Issue 4 Pages 1195
    Published: April 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1195
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  • Zero-Point Distribution of the Partition Function of Two-Dimensional Heisenberg Model
    Shiro Isa
    1971 Volume 30 Issue 4 Pages 1196
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1196
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  • Variational Calculation of Acceptor States in Tellurium
    Kenji Natori, Tsuneya Ando, Masaru Tsukada, Kenji Nakao, Yasutada Uemu ...
    1971 Volume 30 Issue 4 Pages 1197
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1197
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  • Exciton Model and Magneto-Optical Rotation
    Toshihiko Ando, Yuji Kato
    1971 Volume 30 Issue 4 Pages 1198
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1198
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  • Amplification of Sound by Degenerate Conduction Electrons
    Tadao Ishii
    1971 Volume 30 Issue 4 Pages 1199-1200
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1199
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  • Memory Effect in In–Tl Alloy
    Akira Nagasawa
    1971 Volume 30 Issue 4 Pages 1200
    Published: April 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1200
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  • Band Antiferromagnetism in f.c.c. (CoMn)1−xFex
    Kengo Adachi, Kiyoo Sato, Masaaki Matsui, Yasuo Fujio
    1971 Volume 30 Issue 4 Pages 1201-1202
    Published: April 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1201
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  • A Consideration on the Phase Diagram of the Fe–Al System from Precise Measurement of Magnetization
    Hiroaki Morita, Hideo Saito
    1971 Volume 30 Issue 4 Pages 1202
    Published: April 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1202
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  • Effect of Divalent or Metallic Iron Ions on the Spin Relaxation Time of Ferric Ion
    S. K. Date
    1971 Volume 30 Issue 4 Pages 1203-1204
    Published: April 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1203
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  • Continuous Measurement of Electric Charge Carried by Rain Drops in Case of Thunderstorm
    Shuichiro Kawamata, Satomi Kokubu, Yukio Edano, Noriki Kikusato
    1971 Volume 30 Issue 4 Pages 1204
    Published: April 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1204
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  • Magnetic Properties of Rare Earth Chalcogeneide Spinels
    Seizo Kainuma
    1971 Volume 30 Issue 4 Pages 1205-1206
    Published: April 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1205
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