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Volume 21, Issue 11
Displaying 1-50 of 65 articles from this issue
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Hidehiko Mitsui1966 Volume 21 Issue 11 Pages 2097-2102
Published: November 05, 1966
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe correction factor in the external conversion method due to anisotropy of photoelectrons was calculated using two kinds of angular distribution functions. The calculated correction factors were compared with each other and tested by measurement of internal and external conversion lines of Au198 and Cs137. It was found that the correction factors calculated using angular distribution functions given by Hultberg are correct, and that the effect of the Z-dependence of angular distribution functions on the correction factor is negligible for Z=82 and 92.View full abstractDownload PDF (672K) -
Masahiro Koike, Kazuhisa Matsuda, Itaru Nonaka, Yoshio Saji, Kohsuke Y ...1966 Volume 21 Issue 11 Pages 2103-2110
Published: November 05, 1966
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSElastic and inelastic scattering of protons from 60Ni were studied by the use of a 55 MeV proton beam from the INS synchro-cyclotron. Momentum spectra of the scattered particles were obtained with a broad range magnetic spectrometer operated with energy resolution of about 1 per cent. The angular distributions for elastic and inelastic scattering were measured between 2.3° and 88°. Optical-model parameters were adjusted to reproduce the angular distribution for the elastic scattering. The analysis based on the distorted wave Born approximation (DWBA) was made for the inelastic angular distributions assuming direct excitation. The interaction potential for the first order collective excitation was employed with real coupling. Good agreements with experiments were obtained. The effective deformation parameters βl were evaluated by the analysis. The reduced transition ratio to the single particle value is discussed.View full abstractDownload PDF (944K) -
H. Ejiri, T. Ishimatsu, K. Yagi, G. Breuer, Y. Nakajima, H. Ohmura, T. ...1966 Volume 21 Issue 11 Pages 2110-2115
Published: November 05, 1966
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe low-lying states in 29P were excited by the reaction 28Si(3He, d)29P. The analysis of the reaction in terms of the direct reaction process yielded the orbital angular momenta of the transferred protons and the relative values of the proton widths. The reduced proton width obtained from the experiment are generally in agreement with the values predicted on the Nilsson model with small deformation. A number of low-lying levels were found to have very small proton widths. This fact is accounted for as the effects of the rotational excitation and the band mixing of the excited levels. The measurement of the nucleon width may be useful to clarify the property of the excited level.View full abstractDownload PDF (592K) -
Akira Uchida, Kanetada Nagamine, Minoru Imaizumi, Hiromichi Kamitsubo, ...1966 Volume 21 Issue 11 Pages 2115-2122
Published: November 05, 1966
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe (p, n) reaction on 55Mn was studied with the emphasis upon the investigation of the low-lying states of 55Fe. The angular distributions of each neutron groups corresponding to energy states of 55Fe lower than 0.93 MeV were measured at ten different proton energies in the energy range from 2.3 MeV to 2.8 MeV. New levels of 55Fe at 0.51 and 0.68 MeV reported by Kim at ORNL were not observed at least with so much intensities as he claimed. The Integrated cross section of each group corresponding to the low-lying states of 55Fe was analyzed by means of the statistical theory due to Hauser and Feshbach. As a Consequence, the spin and parity of 0.41 MeV level were assigned as 1⁄2−; 3⁄2− was excluded. This assignment is consistent with that suggested by Schiffer et al.. The measurement of The life of the first excited state at 041 MeV was tried as a testing of core-excitation model.View full abstractDownload PDF (772K) -
Koshichi Noto, Yoshio Muto, Tadao Fukuroi1966 Volume 21 Issue 11 Pages 2122-2131
Published: November 05, 1966
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe magnetization curves of In alloys containing 4.39, 4.75 and 5.57 at.% Pb have been obtained as a function of temperature down to 0.38°K. Three critical fields, Hc2(t), Hc1(t) and Hc(t), have been determined in the reduced temperature range corresponding to 1>t2>0.01. Three kinds of Ginzburg-Landau parameters defined by Maki, κ1(t), κ2(t), and κ3(t), agree well with each other at any temperature. The temperature dependence of κ1(t) follows qualitatively Maki’s prediction, while those of κ2(t) and κ3(t) do not. The experimental agreement between κ1(t) and κ2(t) can be explained by the recalculation of κ2(t) by Caroli et al.. The concentration dependence of κ1(t) is in contrary to theoretical results. By analyzing the results, it was found that alloys with Pb more than 4.1 at.% belong to the second-kind superconductor at any temperature and those with Pb between 3.5 and 4.1 at.% show the transition from first- to second-kind superconductivity at a certain temperature The small residual magnetization tails are discussed on the basis of the surface superconductivity.View full abstractDownload PDF (1172K) -
Takuji Tsuzuki1966 Volume 21 Issue 11 Pages 2132-2139
Published: November 05, 1966
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSSolid-liquid transition of molecular substances, A, Ne, D2 and H2 is discussed. The intermolecular potential of Lennard-Jones 12-6 type and the zero-point energy in proportion to the square of the quantum factor Λ are assumed in evaluating the internal energy. Irregularity of molecular arrangement in liquids is described in terms of a parameter Δ, and excess entropy of liquids is postulated to be of the form klog(1+aVΔ3), where k is the Boltzmann constant and V the volume of liquids, and a a certain constant.
The condition of minimum free energy leads to the existence of the first order transition. The transition temperatures, discontinuous increases in volume, and latent heats seem to agree with those observed. Instability of solid helium at pressures below 25 atm is indicated.View full abstractDownload PDF (1020K) -
Masuo Suzuki1966 Volume 21 Issue 11 Pages 2140-2146
Published: November 05, 1966
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA theorem is given for calculating the partition function of quantum mechanical systems. Using this theorem, it is shown that some sort of long-range interaction is equivalent to an effective field. The exact solution of linear anisotropic Heisenberg model with staggered fields, and consequently the zero field staggered susceptibility are given. Finally, it is shown that due to the effect of the transverse components, the value of the Curie point decreases both in the ferromagnetic and antiferromagnetic cases. The rate of decreases in the antiferromagnetic case is smaller than in the ferromagnetic case.View full abstractDownload PDF (512K) -
A. S. Kruglov, I. A. El-shanshoury, M. K. Matta1966 Volume 21 Issue 11 Pages 2147-2153
Published: November 05, 1966
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe luminescence of γ-rayed KCl crystals induced by plastic deformation is found to occur during loading from a stress lower than the elastic limit to the break down stress of the crystal. A similarity between the stree-strain curve and the load-luminescence curve is established. A luminescence yield stress of the irradiated crystals can be determined from the load-luminescence curves. Studies on slip band formation, pre-irradiation treatment of the crystals, and the effect of rate of load application are presented. A qualitative information about the nature of the luminescence produced during the deformation is given. A tentative model of the luminescence phenomenon from the start of the elastic deformation up to the stress under which the crystal is heavily deformed is presented. The model is based on the fact that the regions around dislocations contain a higher concentration of color centers than the average concentration in the bulk. The instability introduced to the regions of high concentration of color centers produces a considerable amount of luminescence. Spikes of luminescence produced at high stresses are due to the formation of slip bands.View full abstractDownload PDF (968K) -
Kêitsiro Aizu1966 Volume 21 Issue 11 Pages 2154-2167
Published: November 05, 1966
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSFirstly, the concept of “subkinds” is defined, and the subkinds of each of the 22 ferroelectric kinds are determined. Secondly, on the basis of these results, the concept of complexity is refined; restrictions are imposed upon the extra symmetry elements in the definition of complexity. The new concept of complexity is narrower but more useful than the old one. It is expected that an arbitrary ferro-paraelectric phase transformation, if not primitive, is most probably complex in the narrower sense. (In fact, the ferro-paraelectric phase transformations known up to now are all primitive or ‘complex in the narrower sense.’) Thirdly, on the assumption of primitiveness and ‘complexity in the narrower sense.’ a determination is made of the possible point groups of the prototype common to two ferroelectric phases transforming to each other when their kinds are specified. It is found incidentally that a considerable number of pairs of kinds should be impossible for ferro-ferroelectric phase transformations. Lastly, comments are made on the concept of prototype and on the method of macroscopic free energy function.View full abstractDownload PDF (1516K) -
Yasusada Yamada, Takemi Yamada1966 Volume 21 Issue 11 Pages 2167-2177
Published: November 05, 1966
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe X-ray diffuse scattering from a crystal of NaNO2 at temperatures above the Néel temperature is analysed to determine the nature of the inter-dipolar interaction in this substance. By taking the Ising model, the space correlation is calculated with the random phase approximation leaving the coefficients of the short range interaction as parameters, and is compared with the observed intensity distribution of the diffuse scattering. It is found that a large part of the inter-dipolar interaction is of the electrostatic nature, and in addition to it, there are an antiferroelectric coupling between the neighbours along the a-axis and a ferroelectric coupling between the neighbours of the corner- and body-centre molecules. The coefficients of the short range interaction decrease with temperature more rapidly than that of the electrostatic interaction. The short range interaction may come from the covalent bonding between N and O and also from the Pauli repulsive interaction between the molecules.View full abstractDownload PDF (1356K) -
Takehiko Oguchi, Ikuo Ono1966 Volume 21 Issue 11 Pages 2178-2193
Published: November 05, 1966
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe statistical theory of the localized model of ferromagnetism has been developed using the effective Hamiltonian method. The present method is an extensive application of that by Strieb, Callen and Horwitz. The result is reduced to that of the Bethe approximation in the Ising model in one limit, and to that of the constant coupling approximation in the Heisenberg model in the other limit. The method has been generalized to calculate the spin pair correlation functions, which are very important for the cross section in the critical magnetic scattering of neutrons. The spin pair correlation functions have been obtained in Ornstein-Zernike type in the vicinity of the critical temperature. The results obtained by Elliott and Marshall, Mori and Kawasaki, and Tahir-Kheli and Callen are compared with the present results and are criticized. The present results are in good agreement with the experimental results. The method has been extended to the antiferromagnetic case.View full abstractDownload PDF (1336K) -
Hiromitsu Kondo, Syôhei Miyahara1966 Volume 21 Issue 11 Pages 2193-2196
Published: November 05, 1966
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe magnetic susceptibilities of Mn-, Fe-, Co- and Ni-orthosilicates were measured between 4.2°K and room temperature. All of these silicates are antiferromagnetic at low temperatures. The susceptibility-temperature curve for Mn-orthosilicate begins to deviate from the Curie-Weiss law at 75°K, and it has a broad peak at 15°K. In Fe-orthosilicate, it has two peaks at 62°K and 23°K. The antiferromagnetic behaviors of these two silicates are rather unusual. They are discussed using a simple Weiss-field approximation. Co- and Ni-orthosilicates behave as ordinary antiferromagnetics. Their Néel temperatures are 47°K and 33°K, respectively.View full abstractDownload PDF (436K) -
Kosuke Asai, Akizo Okuda1966 Volume 21 Issue 11 Pages 2197-2202
Published: November 05, 1966
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSAdditively colored crystals of KC1 have been irradiated, at temperatures in the vicinity of room temperature, with the F-band light which is absorbed almost completely by the crystals. The rate of formation of M centers varies as the 1.34 th power of the concentration of F centers, and as the 0.65 th power of the irradiation intensity. It has a temperature dependence with the thermal activation energy of 0.41 eV. The study of the formation of R centers in the presence of M centers suggests that the mobile species in the crystal is the anion vacancy.
By using the reaction kinetics, the rate of formation of M centers has been analysed. The results are found to be consistent with Delbecq’s suggestion that an anion vacancy migrates to an F center to form an M+ center which on capturing an electron becomes an M center. A similar mechanism for the formation of R centers is also suggested.View full abstractDownload PDF (776K) -
Takehiko Ishii1966 Volume 21 Issue 11 Pages 2202-2207
Published: November 05, 1966
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe properties of V bands produced by X-irradiation at temperatures above 78°K have been investigated in KBr and KCl crystals. Preferential bleaching with polarized light revealed that many V bands have complicated composite structures in spite of the simplicity of their shapes. The observed dependence of shapes and positions of V bands on the duration of irradiation and the crystal temperature during irradiation are attributed to their composite nature. Some of component bands were found to be destroyed by prolonged X-irradiation. The band which had been called V4 in KCl was found not to be one corresponding to the V4 band in KBr.View full abstractDownload PDF (800K) -
Satya Pal, R. P. Gupta1966 Volume 21 Issue 11 Pages 2208-2211
Published: November 05, 1966
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe frequency vs. wave vector dispersion relations for lattice waves travelling along symmetric directions [00ζ], [ζζ0] and [ζζζ] of transition metals molybdenum, tantalum and niobium are calculated according to a model proposed by Sharma and Joshi which includes the effect of conduction electrons on the lattice vibration in metals. The theoretical results are compared with the recently Published experimental dispersion curves obtained from inelastic neutron spectrometry. Tolerable agreement with the neutron spectroscopic data is obtained for molybdenum and tantalum, but not for niobium.View full abstractDownload PDF (420K) -
Atsuo Matsui1966 Volume 21 Issue 11 Pages 2212-2222
Published: November 05, 1966
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe temperature dependence of the absorption edge of crystalline anthracene near 4000 Å has been re-examined using the Glan-Thomson prism in the temperature range from 390 to 79°K. The long wave-length tail of the first absorption band and that of the absorption shoulder due to the vibrationally allowed transition are both represented by the Urbach rule: for the first absorption band σa′=1.73 and σb′=1.76; E0a=3.168 eV and E0b=3.123 eV. The absorption edge of the second absorption band near 2700 Å is also studied, where the b component has an exponentially rising edge as if governed by the Urbach rule.
The Davydov splitting is investigated on doped and undoped thin flakes, and the polarization ratio is measured on bulk crystals. The smaller splitting is discussed in connection with thermal libration of molecular axes or lattice distortion induced by the substituted tetracene molecules. In the pure crystal the first absorption peak is split by about 310 cm−1 for 0°K.View full abstractDownload PDF (1428K) -
Takashi Takeuchi, Seiichiro Noguchi1966 Volume 21 Issue 11 Pages 2222-2228
Published: November 05, 1966
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe thermoelectric power of several dilute alloys of mercury has been measured in a temperature range from 300 to 450°K. The doped elements were lithium, sodium, potassium, cadmium, zinc, indium, thallium, tin, lead, and bismuth. In the case of monovalent solutes, the thermoelectric power has been observed to decrease linearly with solute concentration. In the case of divalent and tetravalent solutes, it increases linearly with concentration. In the case of trivalent solutes, however, the thermoelectric power decreases at first, reaches a minimum and then increases with solute concentration. The minimum and an anomalous value of a parameter ξ recently defined by Ziman et al. will be interpreted qualitatively by considering a large volume dependence of the thermoelectric power of mercury.View full abstractDownload PDF (800K) -
Yositaka Onodera, Makoto Okazaki, Teturo Inui1966 Volume 21 Issue 11 Pages 2229-2238
Published: November 05, 1966
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSEnergy bands in KI are calculated by means of the relativistic Green’s function method. In setting up the potential, one parameter is used so that the gap energy agrees with the observed value. It is found that the highest filled band is completely split off into a couple of bands on account of the strong spin-orbit interaction. Both the top of the valence band and the bottom of the conduction band are located at the point k=0. The d bands which originate from the atomic 3d states in the K+ ions lie just above the lowest s-like conduction band. The results are discussed with reference to recent experimental information. It is suggested that the d bands centered on the alkali ions are responsible for the extra excitons observed in potassium and rubidium halides.View full abstractDownload PDF (1372K) -
Hisao Katsuraki, Norio Achiwa1966 Volume 21 Issue 11 Pages 2238-2243
Published: November 05, 1966
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe magnetic structure of Fe2As has been determined by neutron diffraction. The compound Fe2As is antiferromagnetic with the Néel point at about 80°C. Its magnetic structure is different from Mn2As. The coupling between layers of iron atoms Fe(II) located at (0, 1/2, z) and (1/2, 0, \barz) is antiparallel, but the coupling between a layer of iron atoms Fe(I) located at (0, 0, 0), (1/2, 1/2, 0) and adjacent Fe(II) layers is parallel. The magnetic unit cell has the c-axis twice as large as that of the chemical unit cell. The magnetic moments are 1.28 and 2.05 Bohr magnetons for Fe(I) and Fe(II) atoms respectively. The moments lie perpendicular to the c-axis.View full abstractDownload PDF (660K) -
Kikuo Cho, Hiroshi Kamimura, Yasutada Uemura1966 Volume 21 Issue 11 Pages 2244-2252
Published: November 05, 1966
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA formula for calculating the spin density of the U2-center has been obtained by considering the mixing of the configuration having H− and a hole in the host crystal and the effect of the orthogonalization of the core orbitals between neighboring ions. For the numerical calculation of the g-shifts and hyperfine structure constants of the U2-center, the problem is reduced to the one-hole picture in which the ground state wave function is expressed by an LCAO molecular orbital. It is pointed out that the effect of the configuration mixing plays an important role in producing the smaller hyperfine splitting due to proton in the U2-center than that in the free hydrogen atom, However, the g-shifts and the superhyperfine constants are overestimated by this effect; the effect of the orthogonalization of the core orbitals on these quantities is discussed.View full abstractDownload PDF (1152K) -
Yoshimasa Murayama1966 Volume 21 Issue 11 Pages 2253-2266
Published: November 05, 1966
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA micromagnetic calculation was made in order to estimate the width of the stripe domains in a magnetic thin film with a perpendicular anisotropy, which drives the magnetization out of the plane. The rotation of spins from the average magnetization, not only out of plane (similar to the μ* correction) but also in the plane (similar to the closure domain), was taken into consideration. The rotating angles in both senses were assumed to be functions of the depth from the film surface and of the position across the stripe domain. They were determined so as to satisfy a set of Euler’s equations, and solved numerically and also semi-analytically. The results are in good agreement with the experiments by Saito et al..View full abstractDownload PDF (1408K) -
Mamoru Mekata, Junsuke Haruna, Hideo Takaki1966 Volume 21 Issue 11 Pages 2267-2273
Published: November 05, 1966
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe temperature dependence of sublattice magnetizations and the specific heat due to magnetic ordering of Mn4N were measured in order to study the origin of the anomalous thermomagnetic curve of the compound. The observed magnetization-temperature curves of two sublattices are more convex upwards than those of normal magnetic crystals. The discontinuity of specific heat at the Curie temperature was found to be 7.4±1.0 cal/formula deg. which is much smaller than that expected on the assumption that the localized magnetic moments remain unchanged up to high temperatures. The average state density at the Fermi surface was estimated from the temperature independent magnetic susceptibility to be about 6/Mn eV. It was concluded from these facts that the high state density gives rise to large induced moments at low temperatures which depolarize with increasing temperature.View full abstractDownload PDF (924K) -
Masuo Suzuki1966 Volume 21 Issue 11 Pages 2274-2290
Published: November 05, 1966
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA model is proposed which is similar in character to the Heisenberg ferromagnets in the vicinity of Curie points. Its mathematical structure resembles the Ising model. This model is convenient for investigating magnetic transitions. In one dimension, this model can be treated exactly: it is shown that there occurs no phase transition. The following results are obtained for the two or three dimensional cases: in anisotropic ferromagnets, as the transverse components becomes larger, the Curie point becomes lower; as the number of nearest neighbours becomes larger, the Curie point becomes higher and the anisotropy-dependence smaller. The theory is extended to the cases with higher spin values. In addition, the cross section of critical scattering is calculated using the Bethe approximation for the pair-product model. Finally, the singularity of the susceptibilities in the vicinity of the Curie point is discussed using the Padé approximation for the pair-product model.View full abstractDownload PDF (1640K) -
Michio Kiritani, Akikazu Sato, Sho Yoshida1966 Volume 21 Issue 11 Pages 2291-2299
Published: November 05, 1966
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe nucleation and growth process of voids in quenched aluminum has been studied by observing the changes in the stability of vacancy clusters with time and temperature. The nucleation is found to occur after quenching and to finish in a period very short as compared with the time required for the annihilation of quenched-in vacancies. The nucleation time is much shorter than that for dislocation loops.
It is concluded that there exists a small definite size of the stable nucleus of a void. The cessation of the nucleation is performed by the retention of mobile vacancies in unstable vacancy clusters whose sizes are comparable to or larger than the void nucleus. The formation of dislocation loops and the escape of vacancies to pre-existing sinks are discussed in relation to the nucleation and growth of voids and dislocation loops. The annihilation process of vacancies during a slow quenching is interpreted in terms of the secondary defect formation.View full abstractDownload PDF (2252K) -
Y. H. Ohtsuki1966 Volume 21 Issue 11 Pages 2300-2306
Published: November 05, 1966
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe temperature dependence of the generalized scattering factor corrected for inelastic excitations in the crystal is studied theoretically for dynamical diffraction of X-rays and electrons. It is shown that the generalized scattering factors Φh=\varphih+Ch0 for X-ray diffraction and χh=Vh+Ch0(Y) for electron diffraction (Ch0 and Ch0(Y) are parts due to inelastic electronic excitations, respectively) are modified by the usual Debye-Waller factor, when the thermal motion is described with rigid-ion model and Einstein model.View full abstractDownload PDF (652K) -
Kiyosi O-ohata, Hiroshi Taketa, Sigeru Huzinaga1966 Volume 21 Issue 11 Pages 2306-2313
Published: November 05, 1966
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe details of the method of least squares for obtaining approximate expansions of Slater-type orbitals in terms of Gaussian type orbitals are described. Such Gaussian expansions are given for the 1s, 2s, 2p, 3s, 3p and 3d Slater-type orbitals. These expansions will be good enough to use in the quantum mechenical calculations of molecules.View full abstractDownload PDF (868K) -
Hiroshi Taketa, Sigeru Huzinaga, Kiyosi O-ohata1966 Volume 21 Issue 11 Pages 2313-2324
Published: November 05, 1966
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe Gaussian-expansion method for the evaluation of molecular integrals is described. The molecular integrals over the Slater-type functions are chosen as numerical examples, but the method can be applied to integrals over any other functions as long as the functions can duly be expressed in terms of Gaussian-type functions. A fairly detailed description is presented of the mathematical analysis with the purpose of facilitating the computer coding.View full abstractDownload PDF (1188K) -
Yoshiaki Chikahisa1966 Volume 21 Issue 11 Pages 2324-2331
Published: November 05, 1966
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA theory of the intrinsic viscosity of coiled chain polymers is presented on the basis of an equivalent ellipsoid model, by taking into account the effect of the excluded volume of polymers. A relation between the hydrodynamic expansion of a polymer and its excluded volume is obtained. It is found that the intrinsic viscosity decreases with the increase in shear rates, and that this tendency becomes pronounced with the increase in the molecular weight of the polymer and the power of the solvent used. This originates in the fact that the increase in the excluded volume gives rise to the increase in the fraction of equivalent ellipsoids with large axial ratios. The results are compared with other theories and with experiments. The agreement between the theory and experimental data on polystyrene solutions is fairly good over the range from low to moderate shear rates.View full abstractDownload PDF (860K) -
V. D. Gupta, R. Tewari, D. S. Varma, A. K. Gupta1966 Volume 21 Issue 11 Pages 2332-2335
Published: November 05, 1966
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe theory of cell model for diffuse phase transition has been applied to explain charge induced helix coil transitions in polyglutamic acid and leucineglutamic acid copolymers in aqueous solutions. The experimental data of Snipp, Miller and Nylund have been utilized. Uninterrupted sequence lengths in the helical and random coil regions have also been calculated.View full abstractDownload PDF (368K) -
Masataka Mizushima1966 Volume 21 Issue 11 Pages 2335-2344
Published: November 05, 1966
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe probabiliy of the spontaneous transition n1→n2 through the magnetic quadrupole moment Q2m(mg) is P2m(mg)(n1→n2)=(60πhε0)−1ω5|(n1|Q2m(mg)|n2)|2·Q2m(mg) is a tensor operator of order 2, and (Remark: Graphics omitted.), where ε0 is the capacitivity of the vacuum, e and μ are electron charge and mass, respectively, ri, si, and li are coordinate, spin, and orbital angular momenta, respectively, of i-th electron. When the total spin S is a good quantum number the magnetic quadrupole moment can produce ΔS=±1 radiative transitions. Selection rules are J+J′≥2≥|J−J′|, L+L′≥1≥|L−L′|, and parity change. In many cases the resulting transition probability competes with that by spin-orbit electric dipole moment. Numerical values of these transition probabilities are calculated for many atoms, ions, and molecules using simple wave functions. In atoms P2(mg) is about 10−3 sec−1. In ions and molecules it is larger.View full abstractDownload PDF (1073K) -
Masa-aki Ozaki, Masahiro Tanaka, Youko Kawai1966 Volume 21 Issue 11 Pages 2344-2351
Published: November 05, 1966
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThermal transitions, of DNA type molecules of degree of polymerization from 3 to 10 and larger than 100 are studied, using three models, that is, all or none model, zipper model and broken ladder model. Calculations are made for various values of the ratio of hydrogen bond energy to the sum of hydrogen bond energy and stacking energy.
It is shown that this ratio markedly affects the dependence of the transition temperature upon the degree of polymerization. Therefore, the information on this ratio may be obtained from experimental studies of the chain length dependence of thermal transition. In each of three models for large values of degree of polymerization, it is shown that the reciprocal of the transition temperature is a linear function of the reciprocal of the degree of polymerization of a molecule. It is also shown that even in the case of small degree of polymerization three models give markedly different melting curves if this ratio is large.View full abstractDownload PDF (844K) -
Susumu Shioda1966 Volume 21 Issue 11 Pages 2351-2357
Published: November 05, 1966
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSFlows of two- or three-component viscous plasma between parallel flat plates and in a circular tube in the presence of a pressure gradient and an electric field parallel to the flow are investigated theoretically. Electrical neutrality, frozen ionization, uniform temperature and uniform number densities are assumed since the present work is concerned with the eases for which Mach number is small. The velocity profiles are decomposed into three modes: linear, parabolic and exponential. The last one yields boundary layers whose thicknesses are of the order of the mean free path. It is shown that the electric current is induced not only by the electric field but also by the pressure gradient.View full abstractDownload PDF (524K) -
M. G. Bhatawdekar, B. L. Chotia1966 Volume 21 Issue 11 Pages 2358-2359
Published: November 05, 1966
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe paper explains the increase in discharge current observed by W. E. Bowls [Phys. Rev. 53 (1938) 293] on introduction of sodium in a discharge tube containing nitrogen, without assuming formation of sodium azides.View full abstractDownload PDF (240K) -
Makisaburo Ogasawara1966 Volume 21 Issue 11 Pages 2360-2372
Published: November 05, 1966
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe formation stage of corona breakdown when a D. C. impulse is applied to a negative point-to-plane in air is discussed theoretically, in the similar way as Miyoshi’s theory on the uniform field breakdown. The electrodes are approximated by confocal parabolloids of rotation.View full abstractDownload PDF (972K) -
Shigetoshi Tanaka, Kazuo Takayama1966 Volume 21 Issue 11 Pages 2372-2380
Published: November 05, 1966
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe anomalous emission at the electron cyclotron frequency in partially ionized plasmas was studied in the range of radio frequency below 1000 Mc/s. An anomalous emission was able to be observed when the detecting frequency f exceeded a critical frequency fcrit, which was in the range from 40 to 70 Mc/s, somewhat smaller than the collision frequency of plasma electrons. Another anomalous emission was observed when f was smaller than fcrit The anomalous second harmonic was observed, which resulted from a frequency multiplying of the anomalous cyclotron emission.View full abstractDownload PDF (1748K) -
D. A. Kiewit, J. Rechtien, J. O Brittain1966 Volume 21 Issue 11 Pages 2380-2382
Published: November 05, 1966
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe reflectivities at normal incidence of samples of the intermetallic compounds NiAl and CoAl are presented in the photon energy region from 0.5 to 6.0 eV. The data and their interpretation are compared with those of Sambongi, Hagiwara and Yamadaya (J. Phys. Soc. Japan 21 (1966) 923).View full abstractDownload PDF (352K) -
P. V. Subba Raju1966 Volume 21 Issue 11 Pages 2383-2390
Published: November 05, 1966
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA theoretical analysis is made of the hydromagnetic laminar flow due to the torsional oscillations of an infinite plate when suction is applied at the plate surface. The solution is obtained by expanding the velocity components and the pressure in powers of the amplitude of oscillation of the plate. The combined effects of magnetic field and suction on the flow characteristics have been studied.View full abstractDownload PDF (648K) -
U. Suryaprakasarao, A. S. Gupta1966 Volume 21 Issue 11 Pages 2390-2400
Published: November 05, 1966
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe flow of an electrically conducting liquid due to a porous rotating disc is discussed for the case a uniform magnetic field acts perpendicular to the disc. The solution valid for large values of suction parameter and small magnetic Reynolds number shows that the qualitative behaviour of a magnetic field is similar to that of suction. It is also found that the torque experienced by the disc increases with the increase in the magnetic field.View full abstractDownload PDF (668K) -
Yositaka Onodera, Makoto Okazaki1966 Volume 21 Issue 11 Pages 2400-2408
Published: November 05, 1966
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSIrreducible representations and basis functions are given for the double point groups O, Oh, Td, D4h, C4v, D3d, C3v and C2v. The basis functions tabulated are orthogonal to one another and diagonal with respect to the total angular momentum j=l+s.View full abstractDownload PDF (580K) -
Ko Tamada1966 Volume 21 Issue 11 Pages 2408-2410
Published: November 05, 1966
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSCreeping flow of dilute gas over a plane wall with sinusoidal temperature distribution is investigated. The treatment is based on the fluid-dynamic equation of Stokes together with the slip and temperature-jump conditions at the wall. It is found that the effect of thermal creep sets up a series of stationary eddies near the wall which have a close resemblance to those in ordinary thermal convection due to buoyancy. A kinetic theory approach to the Kundsen layer accompanied is also referred to.View full abstractDownload PDF (224K) -
Kazuko Kubo1966 Volume 21 Issue 11 Pages 2411
Published: November 05, 1966
Released on J-STAGE: May 29, 2007
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Touichi Okada, Koji Shibata, Tokuo Suita1966 Volume 21 Issue 11 Pages 2412
Published: November 05, 1966
Released on J-STAGE: May 29, 2007
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Kazuo Saito, Ryoji Watanabe1966 Volume 21 Issue 11 Pages 2413
Published: November 05, 1966
Released on J-STAGE: May 29, 2007
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Takeshi Takeda, Akinori Watanabe, Hiromu Sasaki1966 Volume 21 Issue 11 Pages 2414-2415
Published: November 05, 1966
Released on J-STAGE: May 29, 2007
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Motokazu Yamamoto1966 Volume 21 Issue 11 Pages 2415A
Published: November 05, 1966
Released on J-STAGE: May 29, 2007
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Mikio Takeyama, Sozaburo Yamasaki, Masatoshi Shimada1966 Volume 21 Issue 11 Pages 2415B-2416
Published: November 05, 1966
Released on J-STAGE: May 29, 2007
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Yoshihiro Tsunoda1966 Volume 21 Issue 11 Pages 2416-2417
Published: November 05, 1966
Released on J-STAGE: May 29, 2007
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Motokazu Yamamoto, Takashi Kikuchi, Chikao Obayashi, Tomoyasu Nakano1966 Volume 21 Issue 11 Pages 2417-2418
Published: November 05, 1966
Released on J-STAGE: May 29, 2007
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Toyoichiro Shigi, Shigehisa Nakaya, Takeshi Aso1966 Volume 21 Issue 11 Pages 2418
Published: November 05, 1966
Released on J-STAGE: May 29, 2007
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Eiichi Kawasaki, Takaya Kawabe, Mikiko Koganei, Kiyoe Kato1966 Volume 21 Issue 11 Pages 2419
Published: November 05, 1966
Released on J-STAGE: May 29, 2007
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