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Volume 16, Issue 6
Displaying 1-45 of 45 articles from this issue
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Yukio Mizuno1961 Volume 16 Issue 6 Pages 1043-1056
Published: June 05, 1961
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSIn this paper the following four problems are studied theoretically.
a) The solution of the three-body problems associated with one meson and two hydrogen nuclei.
b) The number and type of bound states belonging to the mesonic hydrogen molecular ions.
c) The determination of the dominant mechanism of molecular ion formation.
d) The relation of the process, (pμd)s→He3+γ, to the so-called mirror reaction, n+d→H3+γ.
At the end of the paper, it is shown that the theory is in a good quantitative agreement with the experiment for the nuclear as well as the molecular processes.View full abstractDownload PDF (1780K) -
Yoshihide Ishizaki1961 Volume 16 Issue 6 Pages 1056-1065
Published: June 05, 1961
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe absolute differential cross sections for the inelastic scattering of deuterons leading to the first excited state of C12 has been measured at the bombarding deuteron energies of 14.7, 15.9 and 18.1 MeV. Similar measurements were made on Mg24 at deuteron energies of 15.9 and 17.5 MeV and also on Ni60 at 18.1 MeV.
Deuterons are detected with thin CsI crystals, so that protons from (d, p) reactions do not contribute to the cross section. The energy resolution of the detectors is less than 4 percent.
The obtained angular distributions show a prominent peak at small angles in all the cases and the cross sections decrease at the extremely forward angles. Therefore it is not necessary to take into account the electric interaction to explain these reactions. These angular distributions are compared with the results at different deuteron energies given by other authors, and are observed to have an unusual energy dependence.
The data are analysed with the nuclear interaction theory of Huby and Newns. When the theoretical curve is normalized to fit to the measurement at the forward peak, disagreement between the theoretical curve and the experimental one occurs at the other places, which shows the need of modifing the theoretical calculations with the distorted wave approximation taking a proper optical potential to explain the reaction.View full abstractDownload PDF (1088K) -
Takashi Mikumo1961 Volume 16 Issue 6 Pages 1066-1076
Published: June 05, 1961
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSAngular distributions of elastic and inelastic scattering (Q=−4.43 MeV) of alpha particles by the carbon nucleus have been measured at eight different alpha particle energies between 27.0 and 35.5 MeV. These data are discussed together with those reported previously in this journal and with those of other authors.
Angular distributions for both elastic and inelastic alphas show remarkable variation with bombarding energy and cannot be explained with simple direct interaction theories. There appear anomalies in the angular distributions for Eα in the neighbourhood of 30 MeV. Also in the excitation energy near 30 MeV in the compound system, some resonances were found in the elastic excitation function and in the integrated cross section for the inelastic scattering (Q=−4.43 MeV). Even at such high excitation energies the effect of the compound system seems to be important.View full abstractDownload PDF (1736K) -
Ren Chiba, Homer E. Conzett, Haruhiko Morinaga, Naoshi Mutsuro, Katsuf ...1961 Volume 16 Issue 6 Pages 1077-1085
Published: June 05, 1961
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSDifferential cross sections for scattering of He4 by He3 have been measured at Eα=27.7, 28.5, 29.4, 30.0, 32.0, 33.4, 34.7, 36.5, 38.4, 41.0 MeV using a scintillation counter spectrometer, at the center of mass angles from ∼30° to ∼150°. Three distinct minima were found at about 45°, 100°, and 140°. The absolute cross-section and the pattern of the angular distribution showed no appreciable change in the energy range investigated: thus, there was found no sharp resonance in the He3+He4 system corresponding to an excited state of Be7 between 13.4 and 19.2 MeV.
Differential cross-sections of the protons from He3(α, p)Li6 Li6* were observed. Differential cross-sections of alpha-alpha scattering were also measured at Eα=33.5 and 35.5 MeV.View full abstractDownload PDF (916K) -
Atsushi Aoki1961 Volume 16 Issue 6 Pages 1086-1091
Published: June 05, 1961
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe directional correlation and the polarization-direction correlation of the 838 Kev–204 Kev and 584 Kev–204 Kev gamma-gamma cascades in Mo95 have been measured. It is found that the spin of 788 Kev level is 1/2, and that of the 1042 Kev level is either 1/2 or 3/2. The branching ratio of the positron decay is also obtained as 0.4%.View full abstractDownload PDF (760K) -
Michiya Kondo, Takashi Yamazaki, Shotaro Yamabe1961 Volume 16 Issue 6 Pages 1091-1098
Published: June 05, 1961
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe angular distributions of the proton groups corresponding to the lower states of the residual nuclei from the reactions C12(α, p)N15gnd; F19(α, p)Ne22gnd, 1.28 MeV; Al27(α, p)Si30gnd, 2.24MeV; and Si28(α, p)P31gnd, 1.27, 2.23, 3.13∼3.51 MeV have been measured using 22.5±0.2 MeV alpha particles. The angular distributions of the C12(α, p)N15gnd reaction are energy dependent. At 20.6 MeV steep rise in the forward angles is observed, but at 22.2 MeV the steep rise in the backward angles appears instead of the forward rise. The angular distributions of the F19(α, p)Ne22 reaction are both peaked in the backward angles. The angular distributions of the Al27(α, p)Si30 and the Si28(α, p)P31 reactions show the diffraction-like patterns and they are interpreted with Butler’s direct interaction theory.View full abstractDownload PDF (872K) -
Isao Kita1961 Volume 16 Issue 6 Pages 1099-1106
Published: June 05, 1961
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSIn an attempt to study the high energy nuclear interactions of cosmic ray particles, a momentum cloud chamber was operated at Mt. Norikura, 2740 meter high above the sea level, and about ten thousand pairs of stereoscopic pictures of the events were taken. Selected showers were transformed to the C.M.S. of the collisions to obtain the intrinsic features of the nuclear interactions. In the energy range around 100 Gev of incident nucleons, the successive collision model in carbon nuclei, rather than the complete collision model, seems to be consistent with the experimental evidences.View full abstractDownload PDF (1196K) -
Goro Fujioka1961 Volume 16 Issue 6 Pages 1107-1114
Published: June 05, 1961
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESS30 possible nucleon-nucleon interactions of primary energies around 100 GeV observed in a magnet cloud chamber were analyzed in their center of mass systems. The angular distribution of secondary particles was nearly isotropic. The average values of E* and pT were 350 MeV and 220 MeV/c, respectively, the R.M.S. deviations about mean values being 225 MeV and 160 MeV/c. The energy spectrum can be represented as E*−2dE*. The inelasticity of interactions had a tendency to decrease with increasing primary energies. The average inelasticity in the center of mass system was 0.27±0.05. All interactions had almost equal number of shower particles in the foreward and backward directions in the center of mass system.View full abstractDownload PDF (956K) -
Masao Shimizu1961 Volume 16 Issue 6 Pages 1114-1122
Published: June 05, 1961
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe well-known discrepancy between the number of the Bohr magneton obtained from the saturation magnetization at 0°K and that obtained from paramagnetic susceptibilities for Ni is explained by taking into account the s–d exchange interaction, instead of the s–d electron transfer, and the temperature-independent paramagnetism due to the orbital moments of d electrons. The similar discrepancy between the number of magnetic carriers obtained from the paramagnetic susceptibility measurement at lower temperatures and that at higher temperatures for Pd is explained in the same way. The same discussion is applicable to Pt. It is concluded that the temperature-independent paramagnetism is important to understand the temperature variations of susceptibilities of transition metals. The paramagnetic susceptibilities for Ni, Pd, and Pt at higher temperatures are expressed in the form, C⁄(T−θp)+χc. The temperature-independent susceptibility, χc, is the sum of the paramagnetic susceptibility of the conduction electron (or s electron) spins and that due to the orbital moment of d electrons.View full abstractDownload PDF (1164K) -
K\={o} Yasuk\={o}chi, Kazuo Kanematsu, Tetuo Ohoyama1961 Volume 16 Issue 6 Pages 1123-1130
Published: June 05, 1961
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe magnetic properties of Mn3.67Sn, Mn1.77Sn, and MnSn2 were investigated. In Mn3.67Sn, an anomalous magnetic phenomenon was found, which may be due to its antiferromagnetism. The Néel temperature TN, the effective number of Bohr magnetons per Mn np, and the asymptotic Curie point θa are 365°K, 3.58, and −275°K, respectively. Mn1.77Sn is ferrimagnetic. The estimated saturation magnetization per Mn at 0°K, nfμB, as well as np and the Curie temperature TC, were determined after various heat treatments. With lowering the annealing temperature, TC was increased from 226° to 263°K, and nf was increased from 0.92 to 1.23, while np stayed nearly constant at about 3.4. These behaviors are interpreted in terms of the effect of atomic ordering. It was also found that MnSn2 exhibited an antiferromagnetic behavior. TN, θa, and np are 324°K, +190°K, and 3.48, respectively.View full abstractDownload PDF (1188K) -
Takashi Watanabe1961 Volume 16 Issue 6 Pages 1131-1141
Published: June 05, 1961
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe magnetic susceptibility measurements of ammine salts and an-hydrate salts of Mn++, Co++, Ni++ and Cu++ ions at the temperature above 90°K have been carried out previously by Kido and the present author. The magnetic susceptibilities of these salts obtained by them show no deviation from the Curie-Weiss law down to 90°K. The results for magnetic susceptibility measurements of these salts at liquid helium and liquid hydrogen temperatures are given in the present report. The susceptibility measurements were carried out by the Hartshon bridge method. The salts which were studied are Mn(NH3)6Cl2, Mn(NH3)2Cl2, Mn(NH3)Cl2, MnCl2, Co(NH3)6Cl2, Co(NH3)2Cl2, Co(NH3)Cl2, CoCl2, Ni(NH3)6·Cl2, Ni(NH3)6(ClO4)2, Ni(NH3)2Cl2, Ni(NH3)Cl2, NiCl2, Cu(NH3)4SO4·H2O, Cu(NH3)2SO4 and CuSO4. The antiferromagnetic or metamagnetic behavior in all other salts except Mn(NH3)6Cl2, Mn(NH3)2Cl2, Co(NH3)2Cl2, Ni(NH3)6Cl2, Ni(NH3)6(ClO4)2 and Cu(NH3)2SO4 was found in the temperature range from 1.5°K to 20.4°K. The magnitude of the Weiss temperatures θ is largest for Ni++ and smallest for Mn++ in each coordinated salts of M(NH3)6Cl2, M(NH3)2Cl2, M(NH3)Cl2 and MCl2 (M is one of Mn++, Co++ and Ni++ ions). The unexpected results are found in the case of Ni(NH3)6Cl2 and Ni(NH3)6(ClO4)2, as compared with the results of N.M.R. by Kim and Sugawara.View full abstractDownload PDF (1200K) -
Kazuo Kamigaki1961 Volume 16 Issue 6 Pages 1141-1144
Published: June 05, 1961
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe ultrasonic attenuation coefficient and velocity in the superconducting and the normal states of tin single crystals were measured at temperatures between 1.5° and 4.2°K. It was found that (1) the anisotropy of ultrasonic attenuation in different crystallographic directions exists in the case of comparatively long wavelengths (the product of the mean free path of conduction electrons and wave number of sound waves is less than unity). (2) Also the ratio of longitudinal to shear wave attenuation was found to be larger than that predicted from the free electron model.View full abstractDownload PDF (432K) -
Seiichiro Noguchi1961 Volume 16 Issue 6 Pages 1145-1150
Published: June 05, 1961
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe thermoelectric power of magnesium-cadmium alloys was measured relative to pure copper at temperatures between room temperature and 300°C. The measurements were made in the entire ranges of the composition and the data were analyzed by a band-model approximation to obtain some information about the band structure of the alloys in the magnesium-cadmium system.
The thermoelectric power at 300°C as a function of composition shows a smooth trend as well as that of an earlier investigation of the Hall measurements, although the result of the thermoelectric power at room temperature shows that there are three maxima and two minima, while the result of the Hall coefficient gives two maxima and one minimum. In the alloys of the composition corresponding to the ordered phase, anomalies in the thermoelectric power are observed at the transition point. The results of the thermoelectric power indicate that there is no evidence of any extinction or initiation of a band by the alloying. The situation of the Fermi level in A-overlap is discussed.View full abstractDownload PDF (788K) -
Shigeharu Koshino, Toshihiko Ando1961 Volume 16 Issue 6 Pages 1151-1157
Published: June 05, 1961
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe thermal conductivity of semiconductor due to the resonance transfer of ionization energy of impurity state caused by the interelectronic interaction is calculated in each of three temperature ranges, the extrinsic, the exhaustion and the intrinsic ranges. The obtained conductivity increases exponentially with the temperature in the extrinsic range, but decreases in the exhaustion range. In the intrinsic range it increases again exponentially with the temperature when the temperature is lower than a critical point, but decreases as the temperature increases beyond the critical point. The experimental detection of our conductivity is possible under an appropriate condition in the intrinsic range, while impossible for almost all other cases.View full abstractDownload PDF (752K) -
Shigeru Waku, Kunio Masuno, Toshisuke Tanaka1961 Volume 16 Issue 6 Pages 1158-1161
Published: June 05, 1961
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSSubstitutions of potassium ion in potassium ferrocyanide by the other mono-valent positive ions were examined. Substituents to give isomorphous ferroelectric substances through replacing some part of the K ion were found to be NH4, Rb and Tl ions respectively. The peak of the dielectric constant versus temperature curves shifts to the low temperature side by increasing the amount of these substituents. Substituted compounds containing relatively small amount of these substituents show ferroelectric behavior similar to that of potassium ferrocyanide trihydrate.View full abstractDownload PDF (396K) -
Atsushi Okazaki1961 Volume 16 Issue 6 Pages 1162-1170
Published: June 05, 1961
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSIron vacancies in Fe7Se8 are confined to the alternate iron layers parallel to the c plane of the fundamental lattice with the NiAs structure. The origin of the ferrimagnetisni of Fe7Se8 (Tc=187°C) may be attributed to this ordered arrangement similarly to the case of Fe7Se8. There are two types of the superstructure: low- and high-temperature ones. The unit cell dimensions and the lattice symmetries of these structures are as follows:
low-temperature type: A=\sqrt3B, B=2a, C=4c, triclinic,
high-temperature type: A=2a, C=3c, hexagonal,
where the capital and small letters designate the super- and fundamental lattices, respectively. The transition from the triclinic structure to the hexagonal one, which means a rearrangement of the iron vacancies, begins at 240°C, proceeds gradually and finishes at 298°C.View full abstractDownload PDF (1524K) -
Kazuo Kamigaki1961 Volume 16 Issue 6 Pages 1170-1174
Published: June 05, 1961
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe ultrasonic attenuation coefficients in magnetite crystals were measured over the temperature range of 4.2°K–300°K and two kinds of attenuation peaks were observed below the transformation temperature of ionic ordering. The attenuation is attributable to the relaxed electron diffusion between Fe2+ and Fe3+ ions on the octahedral sites in the ordered lattice of magnetite. The electron diffusion processes are classified into the single electron process and the coupled transition. The activation energy of the former process is determined to be 0.055 ev and the latter 0.36 ev.View full abstractDownload PDF (564K) -
Jun-ichi Chikawa, Shuji Imamura, Kenzo Tanaka, Makoto Shiojiri1961 Volume 16 Issue 6 Pages 1175-1180
Published: June 05, 1961
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSBoth X-ray study and electrical measurement were simultaneously carried out keeping the specimen in vacuum. In K–Sb and Na–Sb, the crystallization into the hexagonal structure from amorphous state and the transition from p-type semiconductor to n-type one occur simultaneously with successive activation by alkali metal. But Cs–Sb keeps constantly p-type in spite of the crystallization into the cubic structure from amorphous state. In Rb–Sb, the transition of the structure occurs, i.e., amorphous→cubic→hexagonal, and n-type conduction appears in the hexagonal structure. In order to explain these facts, the relation between the excess alkali atoms and the crystal structure was considered.
The cubic phase of Rb3Sb was found to be the same as the structure of Cs3Sb. The unit cell (a=884±0.02Å) is described by the space group Fd3m–Oh7 with eight rubidium atoms at (0, 0, 0; 0, \frac12, \frac12; \frac12, 0, \frac12; \frac12, \frac12, 0)+0, 0, 0 and \frac14, \frac14, \frac14 and four antimony and four rubidium atoms occupying at random the other positions (0, 0, 0; 0, \frac12, \frac12; \frac12, 0, \frac12; \frac12, \frac12, 0)+\frac12, \frac12, \frac12 and \frac34, \frac34, \frac34.View full abstractDownload PDF (992K) -
Hiroshi Watanabe, Masahiro Fukase1961 Volume 16 Issue 6 Pages 1181-1184
Published: June 05, 1961
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe high temperature modification of sodium ferrite, β-NaFeO2, has weak ferromagnetism, whose Curie temperature is about 450°C. The magnetic property resembles that of LaFeO3. The origin of weak ferromagnetism of β-NaFeO2 can be attributed to the presence of the Dzyaloshinsky type interaction in this compound.View full abstractDownload PDF (476K) -
Ikuhiko Ueda1961 Volume 16 Issue 6 Pages 1185-1194
Published: June 05, 1961
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe Crystal structure of chloranil and bromanil has been determined by X-ray diffraction technique based on the two-dimensional Fourier analysis. Chloranil and bromanil are isomorphous. The cell constants are: a0=8.862, b0=5.837, c0=8.763Å, β=72.6° for chloranil and a0=8.624, b0=6.173, c0=9.027Å, β=74.2° for bromanil. There are two molecules in the unit cell and the space group is P 21⁄a (C2h5). The crystal consists of two layers of substituted halogen atoms which are parallel to the (001) plane, and the skeletons consisting of oxygen and carbon atoms lie between these two layers. The juxtaposition of molecules is such that the dipole interactions between C=O bonds stabilize the structure. There is definite localization of the double bonds in the benzene ring. In the molecule the adjacent halogen and oxygen atoms protrude respectively up and down from the plane of the benzene ring making a puckered form. The thermal motions of the molecules in this crystal have been analysed from the anisotropic thermal parameters of chlorine and oxygen atoms. A theoretical analysis shows that the puckered form is more stable, as a molecule, than the planar form. A clear correspondence is found between this fact and the anisotropic thermal motions of Cl and O atoms.View full abstractDownload PDF (1304K) -
Yasushige Fukano1961 Volume 16 Issue 6 Pages 1195-1204
Published: June 05, 1961
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSStructure changes of supersaturated gold-nickel alloy after successive agings were studied by means of electron diffraction and electron microscopy. Specimens were prepared by vacuum evaporation and subsequent quenching (Y. Fukano and S. Ogawa, J. Phys. Soc. Japan 14 (1959) 1671). After aging at temperatures lower than 165°C, side maxima appear beside the main spots from the matrix. The side maxima disappear after aging at 250–300°C, indicating that they correspond to pre-precipitations. The side maxima were interpreted by assuming a modulated structure similar to that found in Au-Pt alloy by Tiedema et al. (T.J. Tiedema, J. Bouman and W.G. Burgers, Acta Metallurgica 5 (1957) 310). This implies that gold-nickel alloy at the pre-precipitation stage contains a modulated structure similar to that in Au-Pt alloy. After aging at temperatures higher than 300°C, two stable phases with parallel lattices appear. In this state, Widmanstätten structure was found in electron micrographs.View full abstractDownload PDF (1568K) -
Kiichi Sakurai1961 Volume 16 Issue 6 Pages 1205-1213
Published: June 05, 1961
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe Harker-Kasper inequality method was applied successfully to determine most of the signs of structure factors of ethylene diammonium sulphate. Starting from these signs the final Fourier projections on (001) and (100) were obtained. The dimensions of the unit cell containing eight formula units are a=8.47±0.02 A, c=18.03±0.04 A, and the space group is D44–C41221 or D48–C43221. The ethylenediammonium group is of gauche type with an azimuthal angle of 75.7° . The hydrogen bond distances found in this crystal are 2.80 A, 2.81 A, and 2.82 A. The existence of only one kind of two mirror-image configurations of the ethylenediammonium ion in one of the enantiomorphous forms of this crystal may be an important cause of the strong optical rotatory power of the crystal.View full abstractDownload PDF (912K) -
Sigemaro Nagakura1961 Volume 16 Issue 6 Pages 1213-1219
Published: June 05, 1961
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThin cobalt films formed by evaporation were carburized in town gas at temperatures below 550°C for several hours. Electron diffraction studies of these films confirmed the existence of two kinds of carbide, Co2C and Co3C. Co2C is an orthorhombic crystal with lattice constants a=2.910, b=4.469 and c=4.426 Å, and has a distorted c.p.h. structure. The lattice relation between Co2C and Co is (001)Co2C\varparallel(00.1)α-Co\varparallel(111)β-Co and [100]Co2C\varparallel[10.0]α-Co\varparallel[10\bar1]β-Co. Co2C is formed at temperatures in a range 450°∼500°C, and decomposes gradually to α-Co containing stacking faults and graphitic carbon at temperatures in a range 450°∼470°C. Co3C is an orthorhombic crystal with lattice constants a=4.483, b=5.033 and c=6.731 Å and is isomorphous with cementite (Fe3C). The lattice relation is (1\bar21)Co3C\varparallel(10.1)α-Co\varparallel(100)β-Co, and [111]Co3C\varparallel[0\bar1.0]α-Co\varparallel[001]β-Co. Co3C is formed at temperatures in a range 450°∼500°C and decomposes gradually to α-Co containing stacking faults and to graphitic carbon at temperatures in a range 480°∼490°C. The mechanisms of Co2C and Co3C formation and decomposition are discussed.View full abstractDownload PDF (2548K) -
Takao Kawai1961 Volume 16 Issue 6 Pages 1220-1225
Published: June 05, 1961
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe internal motions of some high polymers were investigated by measuring the spin-lattice relaxation time (T1) together with its minima (T1min) in proton resonance in the temperature range from liquid air up to about 300°C by pulsed NMR method at 25 Mc/sec. For acryl-group high polymers (PMA, PEA, PBA), two minima of T1 were observed, one at higher temperature corresponding to the segmental motion and the other at lower temperature to the internal motion of side chain ester alkyl group. For methacryl-group high polymers (PMMA, PEMA, PBMA), three minima of T1 were observed, of which one at the highest temperature corresponds to the segmental motion, the next at the middle temperature to the internal motion of both main chain methyl group and side chain ester alkyl group and the last at the lowest temperature to the internal motion of the latter group alone.
Thus, we could definitely separate the internal motion of amorphous high polymers. The rigorous analysis of the behavior is considered to be a rather difficult problem, because of the complexity of the circumstances and the lack of both existing suitable formulas and precise experimental data.View full abstractDownload PDF (608K) -
Yasaku Wada1961 Volume 16 Issue 6 Pages 1226-1234
Published: June 05, 1961
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe existing data of mechanical dispersions in seven semicrystalline polymers (polyethylene, polypropylene, polyethylene terephthalate, polytrifluoromonochioro ethylene, polyamide, polyurethane and polytetrafluoroethylene) are compiled and the frequency dependence of loss peak temperature (“transition map”) is illustrated. The primary and secondary dispersions occurring in the amorphous regions are identified on the basis of these results. The correspondence of the mechanical dispersions to dielectric ones, transition temperatures found in dilatometric measurements and change in NMR line width with temperature is discussed for these polymers.View full abstractDownload PDF (1016K) -
Takeshi Oka, Yonezo Morino1961 Volume 16 Issue 6 Pages 1235-1242
Published: June 05, 1961
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe centrifugal distortion constants and the inertia defects necessary for the analysis of the microwave spectrum of formaldehyde molecule were calculated by the vibration-rotation theory.
Nielsen’s formulation was used throughout together with the useful relations found by the present authors. The calculated centrifugal distortion constants, inertia defects and Coriolis coupling constants fit well to the experimental values.View full abstractDownload PDF (680K) -
Tsuneo Hashi1961 Volume 16 Issue 6 Pages 1243-1248
Published: June 05, 1961
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSTwo radiation fields (ν1 of about 150 Mc and ν2 of 30, 20, and 15 Mc) are applied at static fields of about 50 gauss. The line shape, the peak position, and the intensity of the signal are well interpreted on the basis of the Bloch phenomenological equation choosing T=4.8×10−8 sec, except for slight discrepancies near H0=ω1⁄|γ|. Some experimental results at ν2=4.5 Mc are also given.View full abstractDownload PDF (1264K) -
Ko Tamada, Yoshio Shibaoka1961 Volume 16 Issue 6 Pages 1249-1252
Published: June 05, 1961
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSIn the present paper is discussed the equilibrium of a pendent drop which appears on the film of water covering a horizontal surface. It is found that the volume of the drop takes a maximum value at a special configuration of D⁄H≅3, where D is the diameter and H the depth, of the drop. The solutions for the equilibrium beyond this maximum cannot be realized in the actual drop, since there is slight but steady current of water into the drop from the surrounding film. The drop, in reality, will become unstable for external disturbance and collapse just before the said limit is reached.
An analytical solution is obtainable for the case of a two-dimensional drop, the cross sectional area of which is also seen to attain a maximum at D⁄H≅1.9.View full abstractDownload PDF (408K) -
Masakazu Shoji, Shoji Tauchi, Tomokuni Mitsuishi, Masami Tomono1961 Volume 16 Issue 6 Pages 1253
Published: June 05, 1961
Released on J-STAGE: May 29, 2007
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Sadao Hoshino, Iwao Shibuya1961 Volume 16 Issue 6 Pages 1254-1255
Published: June 05, 1961
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Mikio Takeyama, Tanehiro Nakau, S\={o}zaburo Yamasaki, Takeshi Isa1961 Volume 16 Issue 6 Pages 1255
Published: June 05, 1961
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Kuniya Fukuda, Hiroaki Matsumoto, Toru Takagi, Yoichi Uchida1961 Volume 16 Issue 6 Pages 1256
Published: June 05, 1961
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Ichiro Tsuboya, Makoto Sugihara1961 Volume 16 Issue 6 Pages 1257
Published: June 05, 1961
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Hiroji Mitsuhashi1961 Volume 16 Issue 6 Pages 1258-1259
Published: June 05, 1961
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Shigetoshi Tanaka1961 Volume 16 Issue 6 Pages 1259
Published: June 05, 1961
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Osamu Nakahara1961 Volume 16 Issue 6 Pages 1260-1261
Published: June 05, 1961
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Akikazu Shibata1961 Volume 16 Issue 6 Pages 1261
Published: June 05, 1961
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Kaizo Nakamura, Kuniya Fukuda, Riso Kato, Atsuo Matsui, Yoichi Uchida1961 Volume 16 Issue 6 Pages 1262
Published: June 05, 1961
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Yasuhiro Miyake, Jiro Furuichi1961 Volume 16 Issue 6 Pages 1263
Published: June 05, 1961
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Tatsuo Shimizu1961 Volume 16 Issue 6 Pages 1264-1265
Published: June 05, 1961
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Mitsuru Asanuma1961 Volume 16 Issue 6 Pages 1265-1266
Published: June 05, 1961
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Ren’iti Kimura, Tetuo Ohoyama, Keizo Endo1961 Volume 16 Issue 6 Pages 1266-1267
Published: June 05, 1961
Released on J-STAGE: May 29, 2007
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Susumu Takeda1961 Volume 16 Issue 6 Pages 1267-1268
Published: June 05, 1961
Released on J-STAGE: May 29, 2007
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Louis Gold1961 Volume 16 Issue 6 Pages 1269
Published: June 05, 1961
Released on J-STAGE: May 29, 2007
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Kanji Katsuura1961 Volume 16 Issue 6 Pages 1270
Published: June 05, 1961
Released on J-STAGE: June 01, 2007
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