巻号一覧
9 巻 (1954)
- 6 号 p. 883-
- 5 号 p. 655-
- 4 号 p. 443-
- 3 号 p. 307-
- 2 号 p. 147-
- 1 号 p. 1-
9 巻, 6 号
選択された号の論文の21件中1～21を表示しています
- |<
- <
- 1
- >
- >|
-
K. Hinotani, K. Suga, Y. Tanaka1954 年 9 巻 6 号 p. 883-887
発行日: 1954年
公開日: 2007/05/29
ジャーナル 認証ありWith the multiplate cloud-chamber, cosmic-ray cascade showers up to 800 Mev were examined with respect to the shower curves and fluctuation. The form of the shower curve is in good agreement with the Wilson’s Monte Carlo curve. And the fluctuation in the number of shower particles seems to be of the Poisson type. From the Shapiro’s experiment and the authors’, Wilson’s results seem to be most reliable in both the absolute value and the form of the shower curve at least up to 800 Mev.抄録全体を表示PDF形式でダウンロード (568K) -
Ryogo Kubo, Kazuhisa Tomita1954 年 9 巻 6 号 p. 888-919
発行日: 1954年
公開日: 2007/06/01
ジャーナル 認証ありA general expression for the frequency-dependent susceptibility of a magnetic system is derived by a quantum-statistical method based on the linear theory of irreversible process. This fundamental equation provides a physical ground for the so-called Fourier transform method for computing the resonance line contour. The auto-correlation function, or the relaxation function of the magnetic moment, that is the Fourier transform of the absorption intensity distribution, can be expanded in terms of the perturbation energy, which is assumed to be responsible for changes of the resonance spectrum from the unperturbed distribution. A general method is shown how to choose from the expansion terms those which contribute to a particular line of interest. This is a generalization of the method of using projection operators. The customary moment method is examined from this point of view. Introducing a further assumption, we propose a method for computing the contour of resonance lines from the obtained expansion. This may be regarded as the quantum-mechanical formulation of the idea employed by Anderson and Weiss for the exchange narrowing problem of paramagnetic resonance. The problem of motional effect on the broadening is treated from this general point of view. Particular applications of the theory to the motional effect of the dipolar broadening in nuclear magnetic resonance and to the exchange effect in paramagnetic cases are also discussed in detail. Some basic equations such as used by Bloembergen, Purcell and Pound for nuclear magnetic case are reexamined and corrected.抄録全体を表示PDF形式でダウンロード (4144K) -
Hiroshi Watanabe1954 年 9 巻 6 号 p. 920-928
発行日: 1954年
公開日: 2007/06/01
ジャーナル 認証ありResults of measurement on the energy loss of 22 kev electrons after passing through various substances—metals, metal oxides, NaCl, Ca(OH)2 and collodion—are given. The apparatus used was an electron velocity analyzer of Möllenstedt type. The design and construction of the analyzer is briefly described and some discussions are given on the results obtained.抄録全体を表示PDF形式でダウンロード (2344K) -
Y\={o}ichi Uchida, Yoshio Nakai1954 年 9 巻 6 号 p. 928-934
発行日: 1954年
公開日: 2007/05/29
ジャーナル 認証ありThe properties of V-center were investigated in the alkali iodide crystals (KI and NaI) containing excess iodine, In KI, the absorption spectrum was similar to that obtained by Mollwo, but for details, there were some difference. It was pointed out that the V-band in KI can be understood as superposition of three bell-shaped bands I, II, and III. Of these, both band I and II can be safely assigned to V2-band. As for band III, however, explanation is not possible at present though it seems to have fairly close relation to the other two bands.
Some proposals were made in regard to the mechanism of the coloring with the pointed electrode and the explanation of the doublet structure of V2-band in KI.抄録全体を表示PDF形式でダウンロード (932K) -
Ryogo Kubo1954 年 9 巻 6 号 p. 935-944
発行日: 1954年
公開日: 2007/06/01
ジャーナル 認証ありThe stochastic theory of magnetic resonance absorption developed recently by P. W. Anderson is examined here further in some details. The fundamental idea of the theory is that the resonating units suffer transitions among their possible states each of which is characterized by a proper frequency of the magnetic moment. The transition is assumed to be described by a Markoffian process. The fundamental equation for the auto-moment or the auto-correlation of the magnetic moment is rederived and transformed. Some general properties of the absorption spectrum are discussed on the basis of this equation. In particular, the narrowed spectrum for the case of rapid transition is proved to be Lorentzian with a half width determined by the equilibrium distribution of the units and the transition matrix of the Markoffian jumps. If the relaxation time of the transition is assumed to be completely degenerate, the resonance spectrum is given by
I(ω)=\frac1π\ extRe∫\fracP(ω′)dω′ωe+i(ω−ω′)\bigg⁄\left{1−∫\fracωeP(ω′)dω′ωe+i(ω−ω′)\ ight}
where P(ω) is the intensity distribution in the limit of slow relaxation, 1/ωe being the relaxation time. Although this idealization is not quite physical, the result is useful for qualitative understanding of the changes in line shapes due to the motional effect. The limit of Gaussian-Markoff case is also discussed.抄録全体を表示PDF形式でダウンロード (1052K) -
Jiro Yamashita, Tatumi Kurosawa1954 年 9 巻 6 号 p. 944-953
発行日: 1954年
公開日: 2007/06/01
ジャーナル 認証ありDetermining the inter-ionic potentials in MgO, CaO and SrO crystals phenomenologically, we have found that the affinity of the O−− ion has different value in each crystal. Using these potentials we have computed the formation energy of the Schottky defect in these crystals and found that the results are reasonable. Finally we tried to explain the deviation from Cauchy-relations in MgO by Lowdin’s many-body forces.抄録全体を表示PDF形式でダウンロード (1148K) -
Mario Yokota, Shoichiro Koide1954 年 9 巻 6 号 p. 953-960
発行日: 1954年
公開日: 2007/06/01
ジャーナル 認証ありUsing the Fourier transform method developed by Kubo and Tomita, the effects of the exchange interaction have been studied for the absorption spectrum of the paramagnetic crystal containing two kinds of unequivalent ions with different anisotropic g-factors. The analysis has been made for the two extreme cases: (i) The exchange interaction is weak and the spectrum consists of two peaks, (ii) The exchange interaction is so strong that the two lines fuse into a single peak. Comparing with the experimental data, the values of the exchange parameters are estimated for CuSO4·5H2O and K2CuCl4·2H2O, and reasonable results have been obtained.抄録全体を表示PDF形式でダウンロード (956K) -
Joji Mizuno, Shiro Ogawa, Tokutaro Hirone1954 年 9 巻 6 号 p. 961-966
発行日: 1954年
公開日: 2007/06/01
ジャーナル 認証ありA new method to determine the intermetallic diffusion coefficient is proposed. A thin layer of one metal was electrodeposited on a surface of another metal, and the surface concentration was examined by the X-ray back-reflection method during the process of diffusion. From the surface concentration vs. time curves the diffusion coefficient was given as a function of concentration. This method was applied to the measurement of intermetallic diffusion coefficient for nickel copper system at the temperature 800, 900, and 1000°C respectively. A discrepancy was found between the diffusion coefficients obtained from the nickel-deposited copper plates and from copper-deposited nickel plates. This is considered to originate from porosities formed near the diffusion interface due to the vacancy flow and from some properties of electrodeposited layer.抄録全体を表示PDF形式でダウンロード (748K) -
Nahonori Miyata, Zenya Funatogawa1954 年 9 巻 6 号 p. 967-973
発行日: 1954年
公開日: 2007/05/29
ジャーナル 認証ありThe magneto-thermoelectric power (change of thermoelectric power due to magnetization of ferromagnetic substances) and its temperature dependency of nickel single crystals are measured. The (Em)100 and (Em)111, which specify the characteristic property along the directions [100] and [111] respectively, are calculated under some reasonable approximations. The true magneto-thermoelectric power depends on the orientations of the crystal and is always positive, except that in the neighbourhood of the Curie point which is negative and is due to additive magnetizations proportional to the external magnetic fields, and represents a maximum value near the room temperature and tends to zero at 0°K and also at the Curie point respectively.抄録全体を表示PDF形式でダウンロード (832K) -
Koichi Shimoda, Tetsuji Nishikawa, Takashi Itoh1954 年 9 巻 6 号 p. 974-991
発行日: 1954年
公開日: 2007/06/01
ジャーナル 認証ありMicrowave spectrum of methylamine molecule has been studied in the frequency range between 7 and 30 kMc/sec. More than two hundred lines and their Stark effects have been measured. These lines are divided into three kinds: (1) ΔJ=0, ΔK=±1, (2) ΔJ=±1, ΔK=\mp1, and (3) ΔJ=0, ΔK=0. Lines of ΔJ=0 and ΔK=±1 form seven well-defined series, p1, p2, q1, q2, r1, r2, and s1. Among them, lines of p series show first-order Stark effects and the others show second-order Stark effects. With theoretical considerations we have assigned these series. From this assignment, the height of the potential barrier for the hindered internal rotation has been determined to be about 680 cm−1. Inversion doubling and its effect on the over-all and hindered rotations are studied. Lines belonging to the classes (2) and (3) are also analyzed. But the determination of molecular constants from the observed data is deferred to a forthcoming paper.抄録全体を表示PDF形式でダウンロード (3032K) -
Goro Kuwabara1954 年 9 巻 6 号 p. 992-996
発行日: 1954年
公開日: 2007/05/29
ジャーナル 認証ありThe optical properties of glasses containing CdS were measured for a few specimens of difterent heat treatment. The absorption edge shifts towards longer wavelengths as the reheating progresses. However, its shape and temperature dependence are similar to those of the single crystal. The maximum wave lengths of luminescent and excitation spectra also shift according with the absorption edge and the linear relation exists between those wavenumbers. From these results, it may be infered that the optical properties of these glasses are due to CdS crystals, and their changes show that the energy gap between the filled and the conduction band in the crystals decreases with reheating, which is probably caused by the change in the lattice constants of the crystal.抄録全体を表示PDF形式でダウンロード (632K) -
Kazunori Takazawa, Tosiro Tomotika1954 年 9 巻 6 号 p. 996-1000
発行日: 1954年
公開日: 2007/06/01
ジャーナル 認証ありBy measuring the optical transmittance of evaporated BaO film in vacuum, it has been found that the threshold for absorption occurs at 3200 Å and the second rapid rise in absorption begins at 2500 Å approximately. Two absorption bands have been observed in the region ranging from 2500 Å to 3200 Å: one has a maximum at 2800 Å and the other has a maximum at about 3000 Å. The latter absorption hand is new and has not been observed so far by the method of optical transmittance, though its presence has been suggested by the photoconduction of BaO single crystal.
The influence of oxygen vapour upon the absorption bands has also been investigated, and it has been observed that when thin BaO film was exposed to oxygen, the absorption bands in the region 2500 Å–3200 Å vanished out suddenly and the film became transparent in the region of wavelengths longer than 2500 Å.抄録全体を表示PDF形式でダウンロード (660K) -
Hisamitu Yosimura, Kuniya Fukuda1954 年 9 巻 6 号 p. 1001-1008
発行日: 1954年
公開日: 2007/06/01
ジャーナル 認証ありIn succesion to Part I and II some important properties of the feed-back resonance amplifier, espescially its response time and noise, are discussed in detail so that the working condition of amplifier may be deduced. Furthermore, it is shown how the working condition is related to scanning rate and resolving power in automatic absorption measurements.抄録全体を表示PDF形式でダウンロード (1276K) -
Isao Imai1954 年 9 巻 6 号 p. 1009-1020
発行日: 1954年
公開日: 2007/06/01
ジャーナル 認証ありIn this paper it is proposed that the basic equation for the two-dimensional transonic flow of a compressible fluid should be
\frac∂2ψ∂τ2+\frac∂2ψ∂θ2=−\frac536\frac1τ2ψ (A)
rather than the commonly used one
\frac∂2Ψ∂η2−η\frac∂2Ψ∂θ2=0, η=(γ+1)1⁄3\fracq−q*q* (B)
or its equivalent. Here τ=−∫μq−1dq, μ=(1−M2)1⁄2, K=(μρ0⁄ρ)2, and Ψ=K−1⁄4ψ is the stream function, (q, θ) are the magnitude and direction of the velocity, q* the critical velocity, M the local Mach number, ρ the density, ρ0 the stagnation density, and γ the ratio of specific heats.
A set of fundamental solutions of (A), which have singularity at the point (τ=τ1, θ=0), is obtained in a natural and elementary way in the form
ψm=τmsinmα{C1Qm−1⁄6(cosα)+C2Qm−5⁄6(cosα)},
where τ1−iθ=τcosα, Qnm being the associated Legendre function. In particular, flow through a Laval nozzle and past a lenticular-shaped body can be constructed by employing the solutions with m=±1⁄2. Finally, discussion is given on the advantage of (A) over (B) as the fundamental equation for the transonic flow.抄録全体を表示PDF形式でダウンロード (1480K) -
Tadashi Kishimoto, Otohiko Nomoto1954 年 9 巻 6 号 p. 1021-1029
発行日: 1954年
公開日: 2007/05/29
ジャーナル 認証ありUltrasonic absorption coefficients (at about 8 Mc/sec) were determined by the pulse technique in glycols, cyclohexanol and m-cresol in dependence of the temperature. Also the ultrasonic velocity (at 1.43 Mc/sec) in these liquids was determined by the ultrasonic interferometry. The experimental absorption coefficient αexp in these liquids decreased with increasing temperature quite in a similar manner as the classical sound absorption due to viscosity αvis. In most of the liquids investigated, however, αexp was higher than αvis, and the excess absorption was attributed to the bulk viscosity due to the hydrogen bond association in these liquids. The ratio αexp⁄αvis, was nearly independent of the temperature for all these liquids, the mean values of this ratio being given by: ethylene glycol 4.88; diethylene glycol 2.23; triethylene glycol 0.98; polyethylene glycol 0.89; propylene glycol 1.46; cyclohexanol 1.14; and m-cresol 1.32. The low value of this ratio for polyethylene glycol is considered to be due to the experimental errors, especially those of the determination of the static viscosity. The activation energyies of the shear and the bulk viscosity were determined from the temperature dependence of the shear viscosity, and that of the bulk viscosity, the latter being calculated from the excess absorption. The two activation energies are nearly the same for the same liquid, being of the order of 8∼10 kcal/mole for most of the liquids here investigated, though slightly lower for ethylene glycol and much higher for m-cresol. The molecular sound absorption, if present, is small, and presumably less than αmol⁄ν2=30∼60×10−17 (αmol=absorption coefficient due to this mechanism, ν=frequency) for most of the liquids investigated. Also ultrasonic absorption (at 24 Mc/sec) in water was determined and was found to be in good agreement with the existing results.抄録全体を表示PDF形式でダウンロード (1072K) -
Toshimichi Sakata1954 年 9 巻 6 号 p. 1030-1031
発行日: 1954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) -
Toshimichi Sakata1954 年 9 巻 6 号 p. 1031-1032
発行日: 1954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 (148K) -
T. Imai, Y. Mizushima1954 年 9 巻 6 号 p. 1032-1034
発行日: 1954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 (224K) -
T. Imai, N. Shibata1954 年 9 巻 6 号 p. 1034-1035
発行日: 1954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 (172K) -
Hiroshi Watanabe1954 年 9 巻 6 号 p. 1035-1036
発行日: 1954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) -
Tetsuji Imai1954 年 9 巻 6 号 p. 1037
発行日: 1954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 (24K)
- |<
- <
- 1
- >
- >|