巻号一覧
7 巻 (1952)
- 6 号 p. 543-
- 5 号 p. 439-
- 4 号 p. 341-
- 3 号 p. 233-
- 2 号 p. 125-
- 1 号 p. 1-
7 巻, 3 号
選択された号の論文の31件中1～31を表示しています
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Hiroshi Ichimura1952 年 7 巻 3 号 p. 233-240
発行日: 1952年
公開日: 2007/06/01
ジャーナル 認証ありAn attempt has been made to interpret the superconducting state of the conduction electrons in the metal by the statistical mechanical treatment, introducting the second order effect of the lattice vibration on the electrons which has first been used by Fröhlich for this problem as the source of the attractive force in the momentum space. Using some reasonable simplifications, we can show the existence of a special equilibrium state which is stable below a certain temperature. If we consider this special state as the superconducting state, we can calculate the jump of the specific heat ΔC and the threshold magnetic field curve which represent well the experimental results: ΔC=γTc (γ is the electronic specific heat coefficient and Tc is the transition temperature), H=2π3Nk2(Tc−T)⁄3μ0 (μ0 is the Fermi energy. N is the number of the electrons in 1 cm3 and k is the Boltzman’s constant).抄録全体を表示PDF形式でダウンロード (1040K) -
Tomoyosi Kawada1952 年 7 巻 3 号 p. 240-244
発行日: 1952年
公開日: 2007/06/01
ジャーナル 認証ありIn the previous paper the discontinuous elongations of magnitude of a few micron were observed for coarse grain polycrystal specimens of commercial aluminium. In this paper the behaviour of slip lines near the grain boundary was observed and it was found that when the slip lines continued across the grain boundary the discontinuous elogation was not observed, while the jumps occured when the slip lines terminated at the grain boundaries. From these results the cause of the discontinuous elongation was discussed.抄録全体を表示PDF形式でダウンロード (1736K) -
Tunezo Satoh1952 年 7 巻 3 号 p. 245-249
発行日: 1952年
公開日: 2007/06/01
ジャーナル 認証ありThe integro-differential equation for the temperature v(x,t) of an infinite cylinder, which is kept at const. temperature initially, and loses heat by the radiation from its surface with variable transfer coefficient h(t) is set up as follows:
V(x,t)=H(t)\sqrtx−\frac∂∂t∫10G∗(x,s)V(s,t)ds,V(x,t)=\sqrtxv(z,t).
The surface temperature H(t) is determined by the relations
\frac12∫0tH(t)dt−∫t∞P(t)dt−∫0tP(t−s)H(s)ds+\frac132=\frac12t−∫0t(t−s)H(s)h(s)ds,
where P(t)=2∑exp(−λ2nt)⁄λ2n, from which further relations between H(t) and h(t)
P(t)−∫0tP′(t−s)H(s)ds=\frac12−∫0tH(s)h(s)ds,
H(t)h(t)=∫0tH′(t−s)P′(s)ds
are obtained. It is shown that in the special case where h=const. known. result can be obtained from these relations. The Fourier transforms of H(t)h(t), H(t) and V(x,t) denoted by K∗(ζ), H∗(ζ) and V∗(x,ζ) respectively, are found to satisfy
V∗(x,ζ)=\frac\sqrtxJ0(kx)J0(k)H∗(ζ)+\frac\sqrtx\sqrt2π\fracJ0(kx)−J0(k)k2J0(k),
K∗(ζ)=\left(iζH∗(ζ)+\frac1\sqrt2π\ ight)J1(k)⁄kJ0(k),iζ=k2.抄録全体を表示PDF形式でダウンロード (456K) -
Tetsuo Wakatsuki, Kenzo Sugimoto1952 年 7 巻 3 号 p. 249-256
発行日: 1952年
公開日: 2007/06/01
ジャーナル 認証ありFluorescent gamma-rays from 32 elements excited by Li-D neutrons were observed by aluminium wall Geiger-Müller counter. Effective mean neutron energy was estimated to be about 10 Mev. Observed gamma-ray intensities, after correcting for experimental conditions and divided by the number of atoms in the specimens, increase almost linearly with atomic weight A up to A≅120 and then become almost constant or slightly decrease at heavier elements. Gamma-ray intensity of uranium is strong but would be ascribed to fission.
These results were discussed utilizing statistical theory and it is suggested that the apparent level spacings beyond A≅120 do not decrease with A, or even become greater, possibly due to the partial excitation of nucleus.
Mean energies of gamma-rays for several elements were estimated by the absorption in lead plates and were found to lie between 0.6 and 3 Mev.抄録全体を表示PDF形式でダウンロード (1072K) -
Ryumyo Ito1952 年 7 巻 3 号 p. 256-260
発行日: 1952年
公開日: 2007/05/29
ジャーナル 認証ありThe end effects—namely the diminution of the effective length and the change of counting probability at the end—in Geiger Mueller counters which have considerably thicker rods at both ends of the central wire than the wire itself are experimentally investigated under various conditions of the filling, and some theoretical interpretations for them are tried. The agreement of the experimentally observed results with the theoretically expected ones is fairly good, and we may conclude that the diminution of the effective length depends not only upon the bend of the lines of electric field but also upon the centrifugal force which affects on the primary electrons traversing along the curved line, and that the change of counting probability at the end of the thin wire is caused by the diffusion of the primary electrons in the axial direction.抄録全体を表示PDF形式でダウンロード (584K) -
Jiro Yamashita, Masao Kojima1952 年 7 巻 3 号 p. 261-263
発行日: 1952年
公開日: 2007/06/01
ジャーナル 認証ありThe Oxygen atoms are supposed to become the doubly-charged negative ions within oxide crystals. There is, however, no experimental evidence of the existence of such ions in gas phase, which fact suggests us that they are probably very unstable in the free state. We, therefore, may reasonably suppose that they are stable only within oxide crystals due to the effects of the surrounding ions. In order to elucidate the above situation quantitatively, we have here attempted to work the electronic states of the oxygen ions within the oxide crystals by the variational method, which we adopted already for the calculation of the cohesive energy of LiF. Thus, we have confirmed, for MgO, that the doubly-charged negative ion of oxygen may be actually stable in such crystals. Furthermore, we have calculated also the electronic affinity of the ions and diamagnetic susceptibility of MgO crystals, which results seem to show rather good agreements with the experimental observations as far as our computational accuracy does concern.抄録全体を表示PDF形式でダウンロード (452K) -
Tutô Nakamura1952 年 7 巻 3 号 p. 264-269
発行日: 1952年
公開日: 2007/06/01
ジャーナル 認証ありWe propose a theory of hindered rotation in molecular crystals, whose basis is on the Kirkwood model. Some values characteristic of the phase trasition due to the molecular hindering are calculated. We obtained for the Curie point, Hc, 1.075, 0.615 and 0.434 for the square, simple cubic and body-centred lattices respectively, where we assumed J⁄2cosγ, for the interaction between two neighbouring molecules, whose relative orientation is specified by γ, and we put H=J⁄2kT. The leap values of the specific heat, ΔCv⁄R, are obtained as 2.280, 2.466 and 2.514 for the square lattice etc. In contrast with the theory of binary alloys, ΔCv⁄R is not improved with compare to Bragg-Williams’ value 2,500. It is different from Chang’s result, according to which ΔCv⁄R is larger than Bragg-Williams’ value considerably. However Chang’s point of view is criticized.抄録全体を表示PDF形式でダウンロード (640K) -
Takeo Matsubara1952 年 7 巻 3 号 p. 270-274
発行日: 1952年
公開日: 2007/06/01
ジャーナル 認証ありA general formula for the diffuse scattering of X-rays is derived for the crystal which has a local lattice distortion due to any kind of lattice defect. The intensity is expressible in terms of the Fourier transform of the potential energy parameters, similar to that introduced by Begbie and Born in their theory of diffuse scattering by lattice vibrations, and that of external forces causing the distortion. It is shown that our diffuse scattering may be observed in some crystal in which the density of the lattice defect exceeds a certain value.抄録全体を表示PDF形式でダウンロード (604K) -
Akira Isoya1952 年 7 巻 3 号 p. 275-283
発行日: 1952年
公開日: 2007/05/29
ジャーナル 認証ありIn the quartz capillary part (8mm φ, 10cm in length) of this ion source with a coaxial magnetic field of about 800 gauss, an intense ionization is established by a collimated primary electron beam sent from one end of the capillary. No metal part being contained in the capillary, a high relative concentration of atomic hydrogen is obtained, so that the proton percentage of the ion beam extracted from the other end of the capillary is very large (60∼70%). A proton output up to 1mA is obtained from a 1.3mm hole with a small consumption of power (<200 watts) and hydrogen gas (∼3cc per hour N.T.P.). The ratio of protons to consumed gas molecules is 10∼20%.抄録全体を表示PDF形式でダウンロード (1436K) -
Jiro Yamashita1952 年 7 巻 3 号 p. 284-286
発行日: 1952年
公開日: 2007/05/29
ジャーナル 認証ありWe have worked out the electronic state of F− ion in LiF crystals by means of the variational method with the use of the analytical wavefunction of 2p type with three parameters for the outermost electrons of F− ion. We see the charge distribution of negative ion is somewhat contracted within the crystal. The lattice energy, the lattice constant and the compressibility of LiF crystals are found to become of 239 Kcal/mol, 2.00 Å and 1.96×10−12 cm2/dyne respectively, which results are compared with the observed values of 240 Kcal/mol, 1.99 Å and 1.4×10−12 cm2/dyne respectively.抄録全体を表示PDF形式でダウンロード (448K) -
Kin-ichi Noga, Shoji Kawamura1952 年 7 巻 3 号 p. 287-291
発行日: 1952年
公開日: 2007/05/29
ジャーナル 認証ありThe spectral distribution of photoelectric yield and its temperature dependency were measured on the barium oxide, in the form of a sprayed coaling on a nickel base. When sample was held at room temperature, the photoelectric emission showed an enhanced effect, that is, the photo-current from the irradiated sample increased with time. The photon energy giving the maximum enhanced effect lies at 2.3ev coincident with the peak of optical absorption by colour centers in barium oxide. This enhanced effect disappeared by warming the sample to 400°K. The results are discussed in terms of an energy level structure of barium oxide.抄録全体を表示PDF形式でダウンロード (660K) -
Seizaburo Kageyama, Kazuaki Nishimura1952 年 7 巻 3 号 p. 292-296
発行日: 1952年
公開日: 2007/05/29
ジャーナル 認証ありThe energy distribution, the most probable and the average energy loss of electrons passing through matter were measured with a 180° focusing spectrometer of approximately 0.7% resolution, using K conversion lines of 606, 1414 and 1761 KeV γ-rays of RsC’ as homogeneous electron source and the various thicknesses of Al, Cu, In and Pb as stopping materials.
The observed value of the most probable energy loss was in accord with Landau’s theory within the limits of our experiment. That of the average energy loss, however, was not in accord with his theory but with Bloch’s formula. The width of the energy distribution curve obtained was considerably greater than predicted by Landau. However, on the high energy side of the peak, the shape of the curve predicted by Landau’s theory was surely better than that of White and Millington’s.抄録全体を表示PDF形式でダウンロード (616K) -
Teinosuke Kanda1952 年 7 巻 3 号 p. 296-298
発行日: 1952年
公開日: 2007/05/29
ジャーナル 認証ありUsing a new circuit, a precise measurement of the frequency ratio of nuclear magnetic resonance of fluorine nucleus to that of proton in HF aq. was performed at the magnetic field of about 1800 gauss. The value νF⁄νH=0.940816 was obtained with the smallest error ±0.000009 compared with the values by other research workers.抄録全体を表示PDF形式でダウンロード (336K) -
M. Z. V. Krzywoblocki1952 年 7 巻 3 号 p. 299-300
発行日: 1952年
公開日: 2007/05/29
ジャーナル 認証ありPDF形式でダウンロード (188K) -
Tetsuya Arizumi, Seiichi Kotani1952 年 7 巻 3 号 p. 300-307
発行日: 1952年
公開日: 2007/06/01
ジャーナル 認証ありThe sorption properties of Ba-O2 system were studied. Oxygen is mainly adsorbed physically onto the active centres, below −150°C, differing from other kinds of gas. The activation energy for the physical adsorption is 0.3∼0.9 Kcal/g.mol. At temperatures between −150°C and −30°C, it is adsorbed in the activated state and its activation energy is 5.8 Kcal/g.mol. Beyond −30°C oxygen combines with barium to form oxide.抄録全体を表示PDF形式でダウンロード (816K) -
Takehito Takahashi1952 年 7 巻 3 号 p. 307-312
発行日: 1952年
公開日: 2007/06/01
ジャーナル 認証ありThe aim of writing this paper is to clarify first the transformation property of spherical harmonics directly from its own definition, and the circumstance that the matrix elements of the irreducible unitary representations of three dimensional rotation group are the eigenfunctions of the so-called symmetric rotor.
It is attempted to treat the old results more naturally and clearly from the standpoint of utilizing the generating polynomial and regarding these matrix elements as the generalization of spherical harmonics. Following this line we see some properties of Jacobi’s polynomial are easily deduced.抄録全体を表示PDF形式でダウンロード (600K) -
Mitutosi Kawaguti1952 年 7 巻 3 号 p. 313-315
発行日: 1952年
公開日: 2007/06/01
ジャーナル 認証ありThe exact analytical expression, correct to M4, for the velocity distribution over an elliptic cylinder which is submerged in a uniform, flow of a compressible fluid (cf. J. Phys Soc. Japan, 6 (1951) 168) is expanded in ascending powers of θ, the eccentric angle of the ellipse, in order to reduce the expression into a more tractable form. Numerical values of coefficients of θ and θ3 are given for various values of thickness ratio t ranging from 0 to 1.0, and it is shown that the convergency of the M2-expansion method is very good near the stagnation point.抄録全体を表示PDF形式でダウンロード (336K) -
Ryosuke Yokota1952 年 7 巻 3 号 p. 316-321
発行日: 1952年
公開日: 2007/05/29
ジャーナル 認証ありIt is found that in fused quartz made in reducing condition three absorption bands having peaks at 2.3, 4.1 and 5.6 ev and in fused quartz made in oxidizing condition two absorption bands having peaks at 4.1 and 5.6 ev are produced by exposure to X-rays. The stability of these centers is studied by bleaching with temperature and light. The band having peak at 5.6 ev is found to be composed of two bands having peaks at 5.6 and 5.87 ev. The band at 2.3 ev is studied to be due to electrons trapped by negative-ion vacancy or by an aggregate of negative-ion vacancies. The luminescent center of fused quartz is proposed to be interstitial silicon atom. It is concluded that fused quartz has in fairly extent short range order of crystal.抄録全体を表示PDF形式でダウンロード (812K) -
Hidenori Hasimoto1952 年 7 巻 3 号 p. 322-328
発行日: 1952年
公開日: 2007/06/01
ジャーナル 認証ありImai’s thin-wing-expansion method is applied to a uniform flow past an elliptic cylinder at zero angle of attack, in order to obtain the analytic expressions correct to the third approximation for the complex velocity potential, and for the velocity distribution over the cylinder. Numerical calculation is made for the case t=0.1 where t is the thickness ratio of the cylinder. The convergence of the result seems to be satisfactory except near the stagnation point, where the anomalous behaviour appears.抄録全体を表示PDF形式でダウンロード (680K) -
Haruzi Isikawa1952 年 7 巻 3 号 p. 329-330
発行日: 1952年
公開日: 2007/05/29
ジャーナル 認証ありPDF形式でダウンロード (216K) -
Yasuo Torikai1952 年 7 巻 3 号 p. 330-331
発行日: 1952年
公開日: 2007/05/29
ジャーナル 認証ありPDF形式でダウンロード (108K) -
Kinshiro Hirakawa1952 年 7 巻 3 号 p. 331-332
発行日: 1952年
公開日: 2007/05/29
ジャーナル 認証ありPDF形式でダウンロード (360K) -
Kikusaburo Osada1952 年 7 巻 3 号 p. 332
発行日: 1952年
公開日: 2007/05/29
ジャーナル 認証ありPDF形式でダウンロード (124K) -
Gen Shirane, Kazuo Suzuki1952 年 7 巻 3 号 p. 333
発行日: 1952年
公開日: 2007/05/29
ジャーナル 認証ありPDF形式でダウンロード (144K) -
J. Yamashita, M. Watanabe1952 年 7 巻 3 号 p. 334-335
発行日: 1952年
公開日: 2007/06/01
ジャーナル 認証ありPDF形式でダウンロード (188K) -
Morihiko Kimata1952 年 7 巻 3 号 p. 335
発行日: 1952年
公開日: 2007/06/01
ジャーナル 認証ありPDF形式でダウンロード (108K) -
Etsuro Sawaguchi, Tomoyoshi Kittaka1952 年 7 巻 3 号 p. 336-337
発行日: 1952年
公開日: 2007/06/01
ジャーナル 認証ありPDF形式でダウンロード (212K) -
Hisao Hirabayashi, Hiroo Toyoda1952 年 7 巻 3 号 p. 337-338
発行日: 1952年
公開日: 2007/05/29
ジャーナル 認証ありPDF形式でダウンロード (232K) -
Makoto Hirabayashi1952 年 7 巻 3 号 p. 339A
発行日: 1952年
公開日: 2007/05/29
ジャーナル 認証ありPDF形式でダウンロード (12K) -
Shizuo Miyake, Sadao Hoshino, Toshio Takenaka1952 年 7 巻 3 号 p. 339B
発行日: 1952年
公開日: 2007/05/29
ジャーナル 認証ありPDF形式でダウンロード (40K) -
Zen’iti Kiyasu, Nobuiti Ikeno1952 年 7 巻 3 号 p. 339C
発行日: 1952年
公開日: 2007/05/29
ジャーナル 認証ありPDF形式でダウンロード (20K)
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