Journal of the Physical Society of Japan
Online ISSN : 1347-4073
Print ISSN : 0031-9015
ISSN-L : 0031-9015
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Volume 10, Issue 9
Displaying 1-19 of 19 articles from this issue
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  • Angular Correlation of Gamma Rays from Fe56
    Mitsuo Sakai
    1955 Volume 10 Issue 9 Pages 729-735
    Published: September 05, 1955
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.10.729
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    The gamma rays emitted in the decay of Co56 were studied by gamma-gamma angular correlation measurements. The results of these experiments permitted the discussion of the energy levels of the daughter nucleus, Fe56. The gamma-gamma coincidence experiment showed the presence of 2.03-Mev. gamma ray decaying to the second excited level. One part of the decay scheme was confirmed by positron-gamma coincidence experiment. The first and the second excited levels were assigned to be 2+ and 4+ respectively from the special consideration on the angular correlation data. The spins of the other levels were discussed also.
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  • On the Momentum Spectrum of μ-Mesons near Sea-Level at 24°N
    Sh\={u}ji Fukui, Takashi Kitamura, Y\={o}jir\={o} Murata
    1955 Volume 10 Issue 9 Pages 735-741
    Published: September 05, 1955
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.10.735
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    The momentum spectrum of μ-mesons near sea-level and at geomagnetic latitude 24°N has been obtained by means of a magnet cloud chamber. Above 700 Mev/c the results are in agreement with the momentum spectrum derived from Olbert’s production spectrum at 24°N. At lower momenta, our spectrum is found to decrease more rapidly than the corresponding spectra derived from differential range measurements. This discrepancy, which is not understood, may be due to some systematic error in either the magnetic deflection or differential range method.
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  • On the Penetrating Showers Produced in Paraffin and Graphite
    Isao Miura
    1955 Volume 10 Issue 9 Pages 741-748
    Published: September 05, 1955
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.10.741
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    The production of the penetrating showers in paraffin and graphite was studied by a cloud chamber connected with a hodoscope at an elevation 2760 meters, geomagnetic latitude 25°N. Results indicate:
    (1) There is an evidence of multiple production of mesons in the collision of an incident nucleon with a hydrogen nucleus. (2) There is no appreciable difference between paraffin and graphite in the projected angle distribution of lightly ionizing shower particles with respect to the primary particles. (3) The flux of ionizing particles which produce the local penetrating showers is (3.0±0.4)×10−5/cm2. sec. sterad.
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  • Systematization of the Approximate Solutions of the Thomas-Fermi Equation
    Kwai Umeda, Shigehiro Kobayashi
    1955 Volume 10 Issue 9 Pages 749-752
    Published: September 05, 1955
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.10.749
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    Based on the generalized Brinkman’s remark that xσφ can be treated as a constant over the whole range of x, three homologues of the approximate TF solutions, i.e. 1. Brinkman, 2. Kerner-Tietz-Umeda and 3. Sommerfeld-March, are systematically established under either of two different guiding principles, the linearization of the TF equation in regard to φ and the elimination of the explicit x in the TF equation.
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  • On the Influence of the Packing on the Atomic Scattering Factor Based on the Thomas-Fermi Theory
    Kwai Umeda, Yasuo Tomishima
    1955 Volume 10 Issue 9 Pages 753-758
    Published: September 05, 1955
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.10.753
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    The influence of the juxtaposition in the crystal on the atomic scattering factor has been investigated on the basis of the Thomas-Fermi (abbreviated as TF) theory, using the TF functions appropriate to the packed neutral atoms. It is pronounced especially for the smaller values of sinθ⁄λ·Z−1⁄3. The values of the atomic scattering factor for free neutral atom have been recalculated anew, using the most accurate Miranda values of the free neutral TF function.
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  • Accurate Value of the Initial Slope of the Ordinary TF Function
    Shigehiro Kobayashi, late Takehiko Matsukuma, Sokichi Nagai, Kwai Umed ...
    1955 Volume 10 Issue 9 Pages 759-762
    Published: September 05, 1955
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.10.759
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    By the inward numerical integration of the TF equation the accurate values of the initial slope as well as the asymptotic parameter of the ordinary TF function have been ultimately determined as
    B0=1.5880710
    and
    F0=13.270934,
    and the exact values of the function itself have been tabulated.
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  • A Note on the Paramagnetic Relaxation
    Mario Yokota
    1955 Volume 10 Issue 9 Pages 762-768
    Published: September 05, 1955
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.10.762
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    Introducing the spin-spin relaxation time and the spin-lattice relaxation time in Bloch’s equation simultaneously, we have calculated the relaxation equation of paramagnetic substances. As the contribution from the spin-spin relaxation to the imaginary part of the complex susceptibility, a term proportional to (1−F)2 instead of (1−F) given by Brower has been obtained. Our theory explains the experimental results obtained by Gorter et al for the dependence of the spin-spin relaxation time on the static field strength.
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  • Formation Energy of Superlattice in Ni3Fe Part (IV)
    A Theoretical Treatment of Vacancy Migration and Disorder-order Transformation in Alloys
    Sh\={u}ichi Iida
    1955 Volume 10 Issue 9 Pages 769-785
    Published: September 05, 1955
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.10.769
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    The paper consists of two parts. In part I, the disorder-order transformation of AB type superlattice was studied by postulating an elementary mechanism of atomic diffusion through vacancy, that is, the exchange of a vacancy and its neighbouring atom. The height of potential for the atomic migration was assumed to be a constant plus nearest neighbour energies of the atom. The kinetics of the ordering was treated in an approximation which is equivalent to the well known. Bethe Peierls’ approximation. This is described by five differential equations to determine five time dependent variables, three of which are concerned with vacancies. By solving these equations, it was shown that if an AB type alloy is quenched from a high temperature disordered state to a temperature somewhat below the critical temperature, and then annealed at that temperature, the following disorder-order transformation will exhibit a multiple-step character. In part II, this prediction was compared with the experimental results of Ni3Fe. It was found that the theory can describe at least qualitatively, each of the observed four stages of the disorder-order transformation at 490°C of this alloy. Namely, the first stage is the abrupt change in the state of imperfections, the second, the development of short range order without long range order, the third, the cooperative formation of long range order, and the fourth, the process to complete its long range order against the retarding effect of antiphase and imperfections.
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  • On the Polarization of Silver Sulfide
    Shin-ya Miyatani
    1955 Volume 10 Issue 9 Pages 786-793
    Published: September 05, 1955
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.10.786
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    The variation of the chemical potential of electrons in Ag2S with the variation of the Ag/S ratio was measured with the help of the e.m.f. measurements of the galvanic cell Ag|AgI|Ag2S|Pt. The relation between the chemical potential of electrons and the density of conduction electrons was found to be in accordance with the theory, and it was found that the conduction electrons in β–Ag2S obey the classical statistics while those in α-Ag2S are degenerate. Polarization phenomena when weak direct current of constant intensity is sent through Ag2S specimen were also studied. The potential distributions along the specimen and the time rate of building up or decay of polarization show good agreement with the theory in both α- and β-phases. The conductivities were measured and discussed.
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  • X-ray Studies on the Structures of Solid Solutions NaCl-CaCl2 II
    Structures of {111} and {310} Plate-Zones
    Kazuo Suzuki
    1955 Volume 10 Issue 9 Pages 794-804
    Published: September 05, 1955
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.10.794
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    Structures of {111} and {310} plate-zones explaining the rod distributions of intensity weight in reciprocal space revealed in X-ray patterns from solid solutions of NaCl containing a few per cent of CaCl2 (reported in Part I) is proposed. The plate-zones are considered to be composed of a number of smaller units, called platelets, which are disposed in anti-phase relation among themselves in a plate-zone. We proposed probable models of the structures of the two kinds of platelets making up the {111} plate-zone and the {310} plate-zone respectively by assuming that each platelet has crystal structure resembling that of CaCl2, retaining, however, coherency with the matrix. The qualitative agreement was found between observed and calculated intensities of rod distributions in reciprocal space.
    The proposed CaCl2-like structure of the {111} platelet seems to be plausible one, since it was found that its orientation was followed by that of CaCl2 particle which precipitated by a certain heat treatment. In the case of the ⟨310⟩ rods, the proposed structure of the {310} plate-zones is rather tentative. Absolute intensity of the ⟨111⟩ rods was roughly estimated by comparing it with that of thermal diffuse scattering from pure NaCl crystal. It was found that we could expect the intensity of the diffuse spots due to the rods to be of the same order as that of thermal diffuse scattering even when only a few per cent of the dissolved Ca++ ions are participating in the {111} plate-zones.
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  • Theory of Viscoelasticity of Amorphous Polymers
    Osamu Nakada
    1955 Volume 10 Issue 9 Pages 804-813
    Published: September 05, 1955
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.10.804
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    A statistical mechanical theory of the intra-chain relaxation (or relaxation of the micro-Brownian motion) in amorphous polymers is presented. The generalized diffusion equation of configurational changes of a chain imbedded in polymer environment is solved for a dynamical case under suitable potentials assumed. In order to avoid the complication of the chain space geometry, an artifice is adopted such that we replace each chain bond with a fictitious spring. The derived spectrum of relaxation times just coincides with the experimental formula of the wedge type spectrum found by Tobolsky for polyisobutylene, manifesting a characteristic slope of −1⁄2 in the log-log plot of the relaxation spectrum. The theoretical expression also satisfies the condition of the thermorheological simplicity.
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  • Application of the Thin-Wing-Expansion Method to the Compressible Flow past a Kaplan Bump
    Yaso’o Matunobu
    1955 Volume 10 Issue 9 Pages 814-822
    Published: September 05, 1955
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.10.814
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    About ten years ago Kaplan calculated the velocity distribution over a certain cusped aerofoil set in a compressible flow as far as O(t3), t being the thickness ratio. Here the same problem is reinvestigated by use of the thin-wing-expansion method due to Imai, which is believed to be more convenient than the usual perturbation method. Both results completely agree with each other in the analytical expressions, although the labour is considerably less in the present analysis than Kaplan’s.
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  • Interaction Between Slip Bands and Particles of Precipitate in an Aluminium Alloy
    Shigeyasu Koda, Taro Takeyama
    1955 Volume 10 Issue 9 Pages 822-823
    Published: September 05, 1955
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.10.822
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  • On Upper and Lower Bounds of the Eigenvalues of a Free Plate
    Yoshimoto Nakata, Hiroshi Fujita
    1955 Volume 10 Issue 9 Pages 823-824
    Published: September 05, 1955
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.10.823
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  • Some Coefficients of the Series Expansion of the TFD Function
    Shigehiro Kobayashi
    1955 Volume 10 Issue 9 Pages 824-825
    Published: September 05, 1955
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.10.824
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  • Ultraviolet Absorption Spectra of Uranium Glasses
    Kikusaburo Osada
    1955 Volume 10 Issue 9 Pages 825-826
    Published: September 05, 1955
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.10.825
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  • The Thormoluminescence of Glasses
    Takeo Kikuchi
    1955 Volume 10 Issue 9 Pages 826-827
    Published: September 05, 1955
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.10.826
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  • On Exact Solution of the Blast Wave Problem
    Akira Sakurai
    1955 Volume 10 Issue 9 Pages 827-828
    Published: September 05, 1955
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.10.827
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  • Zeeman Splitting of Nuclear Quadrupole Resonance in Paradibromo Benzene
    Shoji Kojima, Kineo Tsukada, Yasushi Hinaga
    1955 Volume 10 Issue 9 Pages 828
    Published: September 05, 1955
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.10.828
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