All issues
Volume 25 (1968)
- Issue 6 Pages 1525-
- Issue 5 Pages 1207-
- Issue 4 Pages 933-
- Issue 3 Pages 655-
- Issue 2 Pages 301-
- Issue 1 Pages 1-
Predecessor
- Proceedings of the Physico-Mathematical Society of Japan. 3rd Series
- Proceedings of the Tokyo Mathematico-Physical Society. 2nd Series
- Tokyo Sugaku-Butsurigakukwai Kiji-Gaiyo
- Tokyo Sugaku-Butsurigakkwai Hokoku
- Tokyo Sugaku-Butsurigaku Kwai Kiji
- Tokyo Sugaku-Butsurigaku Kwai Kiji
- Tokyo Sugaku Kaisya Zasshi
Volume 25, Issue 5
Displaying 1-50 of 58 articles from this issue
-
Kazuhisa Matsuda, Noriyoshi Nakanishi, Sigeru Takeda, Takeshi Wada1968 Volume 25 Issue 5 Pages 1207-1213
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSDifferentical cross sections of the 12C(3He, p)14N reaction were measured at the incident energy of 25.3 MeV. Angular distributions for individual levels showed patterns of the direct surface reaction. Contributions from overlapping peaks were resolved with a computer code. Strong peaks were found at the excitation energies of 9.0 MeV and near 13.0 MeV. These facts are in agreement with other cases of the proton-neutron transfer to 12C. Comparisons between the reactions of (3He, p) and of (α, d) are discussed.View full abstractDownload PDF (908K) -
Shigeru Kakigi, Noboru Fujiwara, Kiyoji Fukunaga, Dai-Ca Nguyen, Sukea ...1968 Volume 25 Issue 5 Pages 1214-1219
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSLi7 ions from the B11(α, Li7)Be8 reaction were detected with a 50μ thick SSD covered with aluminum absorbers. The analyses suggest that the compound nucleus process is not favorable to the B11(α, Li7)Be8(g.s.) reaction. The angular distributions of Li7(0.478 MeV state) can be reproduced by the calculation based on the triton pickup process. The feature of the angular distributions of Li7(g.s.) is quite different from that of Li7(0.478 MeV state) and is qualitatively explained by the triton pickup process and the Li7 knockout process interfering with each other.View full abstractDownload PDF (720K) -
Taro Asano1968 Volume 25 Issue 5 Pages 1220-1224
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSLee-Yang’s theorem which states that all the roots of the partition function of the ferromagnetic Ising model of spin 1/2 lie on the unit circle in the complex ‘fugacity’ plane is generalized to the case of S=1 and 3/2, where S is the magnitude of the spin.View full abstractDownload PDF (528K) -
Noboru Matsudaira1968 Volume 25 Issue 5 Pages 1225-1235
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe effect of lattice vibration on the second-order phase transition for the Ising model is investigated. The total Hamiltonian of the system is separated into the phonon part and the spin part, if the displacement of the atoms from their equilibrium position is assumed to be small. The spin part of the free energy is then calculated (i) in the molecular-field approximation for the square and the simple cubic lattices, and (ii) by the method due to Kadanoff, a modification of the Onsager’s exact solution, for the square lattice. The results show that (i) the phase transition remains to be of the second order, (ii) the critical temperature increases, and (iii) the magnetic part of the heat capacity decreases, both for ferro- and antiferromagnetic Ising models.View full abstractDownload PDF (1304K) -
Takeo Fujiwara, Kazuo Ohtaka, Sadaaki Yanagawa1968 Volume 25 Issue 5 Pages 1236-1248
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe influence of the free crystal surface on the Heisenberg ferromagnet, which has nearest-neighbour exchange interactions, has been considered using the double time Green’s functions. The existence of the surface on which atomic spins have different exchange integrals and g-factors from those of bulk spins is shown to have a possibility of giving rise to a new mode which is localized in the vicinity of the surface. The free surface also introduces the new correction term to the low temperature magnetization and specific heat which are otherwise both proportional to T3⁄2. This correction is proportional both to the temperature and to the area of the surface and is shown to be detectable when the crystal has a proper size and thickness.View full abstractDownload PDF (1128K) -
Nobuo Mori1968 Volume 25 Issue 5 Pages 1249-1252
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe condition for the appearance of ferromagnetism for Ni, Pd and Pt metals is investigated in the molecular field approximation through the calculation of the spin paramagnetic susceptibilities on the basis of the energy bands given by Friedel et al.. It is concluded that the effect of the spin-orbit interaction is insufficient to support the fact that ferromagnetism appears only in Ni metal and it does not appear in Pd and Pt metals. This fact is supported by three contributions; the difference of the molecular field, the number of the d holes and the effect of the spin-orbit interaction for the respective metal. These three contributions are nearly the same with each other in their effects.View full abstractDownload PDF (548K) -
Akira Sawaoka, Syôhei Miyahara, Syun-iti Akimoto1968 Volume 25 Issue 5 Pages 1253-1257
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSManganese metasilicate and manganese, ferrous and cobalt metagermanates with pyroxene structure were prepared by usual ceramic techniques. Ferrous and cobalt metasilicates were synthesized under high pressure. The magnetic susceptibilities of the eight pyroxenes were measured in the temperature range from 4.2 to 300°K. All of these pyroxenes are antiferromagnetic at low temperatures. The Néel temperatures of MnSiO3, MnGeO3, CoSiO3, and CoGeO3 are respectively 7°K, 10°K, 50°K and 41°K. The susceptibility-temperature curves for FeSiO3 and FeGeO3 show two peaks. They are discussed on the basis of a simple molecular field approximation.View full abstractDownload PDF (560K) -
Kenzo Sugimoto, Kozi Nakai, Kozi Matuda, Tadanori Minamisono1968 Volume 25 Issue 5 Pages 1258-1267
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe magnetic moments of 12B(T1⁄2=20 ms) and 12N(T1⁄2=11 ms) have been determined by an NMR method using the recoil polarization and the asymmetric β decay. The nuclear polarization was preserved by using a holding static magnetic field and a recoil stopper of metal foil. Several kinds of metal foils were employed. Relative shifts of the order of 10−3 between the centers of NMR by different metals and the resonance widths comparable to the dipolar broadening were observed. The results obtained for the magnetic moments are μ(12B,1+)=+(1.003±0.001) nm and μ(12N,1+)=+(0.4571±0.0005) nm.View full abstractDownload PDF (1096K) -
Naoichi Yamamoto, Teruya Shinjo, Masao Kiyama, Yoshichika Bando, Toshi ...1968 Volume 25 Issue 5 Pages 1267-1271
Published: November 05, 1968
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSMössbauer absorption spectra were measured for oriented samples of α- and β-FeOOH particles at antiferromagnetic and paramagnetic states, which were prepared utilizing the anisotropic particle shape. Considering the intensity ratio of six absorption peaks, the direction of the electron spin in antiferromagnetic state was concluded to be parallel to crystal c-axis in each compound. From the intensity ratio of paramagnetic quadrupole doublet, the electric field gradient was discussed. The gradient axis of β-FeOOH was estimated to be in c-plane.View full abstractDownload PDF (940K) -
Shinya Wakoh, Jiro Yamashita1968 Volume 25 Issue 5 Pages 1272-1281
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSInternal field of ferromagnetic iron is evaluated on the basis of the self-consistent and spin-dependent band structure, which was calculated by the authors. The number of the 4s electrons, (that is, the s component of the s-, p- and d- hybridized conduction bands), and the number of unpaired 4s electrons are determined by the band wave-functions. The wave functions of the core electrons are spin-dependent because of the polarization of the conduction electrons. They are determined by the variational method in the frame of the unrestricted Hartree-Fock scheme. The calculated value of the Fermi contact term χ of iron is −4.415, while the observed value is −3.6. The agreement between theory and experiment is reasonable. A similar calculation of the Fermi contact term of nickel gives the value −5.8, while the observed value is −6.75. The isomer shift of Fe57 is also calculated.View full abstractDownload PDF (1672K) -
Masahiro Kumano, Mitsugu Hanabusa1968 Volume 25 Issue 5 Pages 1282-1288
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe nuclear spin relaxation times T1 and T1ρ for Na in doped NaCl crystals, along the static and rf field, respectively, have been measured below 110°C to study slow thermal motion of the bound positive ion vacancy around the divalent impurity ions Cd++, Ca++, and Sr++ Below 110°C almost all vacancies form complexes with divalent ions. Slichter’s formula for T1ρ is applicable to the present case where the electric quadrupole interaction determines the local field. Activation energies for the jump of a vacancy in a nearest-neighbor Na site to a next nearest-neighbor site have been measured accurately; 0.64±0.03 eV for NaCl:Cd, 0.71±0.05 eV for NaCl:Ca, and 0.74±0.03 eV for NaCl:Sr. These values agree with the results of dielectric relaxation and ionic thermocurrent measurements. Motion of vacancy-impurity dipoles in a higher complex (probably the pentamer) causes complicated temperature dependence of relaxation times in Ca-doped NaCl.View full abstractDownload PDF (912K) -
Takafumi Aomine, Yoshio Shibuya1968 Volume 25 Issue 5 Pages 1289-1298
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe magnetic transition of Sn–In alloys at temperatures near the critical temperature range became broad with the increase of temperature for alloys with more than about 1.6 at. % In (nominal), which showed magnetic hysteresis with trapped flux. These alloys did not have well-defined critical temperatures and the superconducting transition occurred in certain critical temperature ranges. These behaviours are thought to be due to the inhomogeneous distribution of impurities. In the most dilute alloy—Sn-0.38 at. % In (nominal)—specimen, the superconducting nucleation field Hc3 exceeded the thermodynamical critical field Hc and supercooling occurred at lower temperatures. However, its supercooling field for the bulk Hs was nearly equal to Hc3 near the critical temperature. This result is in agreement with the calculations by Feder and by Park. Energy gap obtained from the magnetization with Toxen’s formula approached the BCS value, 3.5 kTc as the impurity increased.View full abstractDownload PDF (1296K) -
Tadao Inuzuka, Ryuzo Ueda1968 Volume 25 Issue 5 Pages 1299-1307
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSNucleation of gold deposits on the cleavage surface of NaCl and KCl has been studied as a function of substrate temperature and incidence rate. Experimental results on vacuum cleaved surface indicate that selective nucleation occurs on imperfection sites such as point defects and impurities, and that random one occurs on defect-free surfaces at relatively higher deposition rate.
The deposits on color-centered surfaces of NaCl produced by X-ray irradiation showed an increase of nucleation density compared with that on the normal cleavage surfaces and an enhancement of (100) parallel epitaxy at relatively lower substrate temperature. It appears that the controlled production of point defects has an important role in nucleation and growth. The nature of nucleation sites is discussed in connection with the epitaxial growth of deposits.View full abstractDownload PDF (2068K) -
Takeshi Ogasawara, Yoji Kubota, Ko Yasukochi1968 Volume 25 Issue 5 Pages 1307-1323
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe superconducting transition temperature and isothermal magnetization have been measured for a series of Nb–Ta alloys ranging from Nb-13 at. % Ta to Nb-83 at. % Ta. These alloys are characterized as dirty type II superconductors; the electron mean free path l lies in a range from 0.1 ξ0 to 0.3 ξ0, where ξ0 is the intrinsic coherence length. The Ginzburg-Landau parameter κ takes the maximum value of 4.1 at the composition, Nb-50 at. % Ta. In concentrated alloys with compositions 20∼80 at. % Ta, the temperature dependence of the generalized Ginzburg-Landau parameter κ1(T) accords with the theory for the dirty limit. Especially, the reduced parameter at 0°K, κ1(0)⁄κ, is in excellent agreement with the theoretical value 1.20. This agreement between experiment and theory is attributed to the fact that the temperature dependence of both the thermodynamic critical field Hc(T) and the upper critical field Hc2(T) follows the microscopic theory.View full abstractDownload PDF (2012K) -
Toshihiko Taki, Hiroshi Bo1968 Volume 25 Issue 5 Pages 1324-1329
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe decay behavior of photo-induced electron spin resonance of chromium in ZnS has been studied at temperatures between 77°K and 325°K with X-band. The Cr+ ESR signal appeared under irradiation of light in a band centered around 3650Å. The simple calculations of photo-induced ESR signal have been made and compared with the experimental results. From these experimental results, it has been found that the decay behavior of Cr+ ESR signals obey the bimolecular recombination process. The decay time constants above 250°K obey the exponential law (exp(−Et⁄kT)) and below 250°K they depart from this law. Especially, below 120°K these decay time constants are independent of temperature. In order to explain these temperature independent decay time constants below 120°K, the donor-acceptor pair recombination mechanism may be considered. On the other hand, the decay time constants above 250°K enable us to determine the value of trap depth (Et=0.78 eV) which is in a reasonable agreement with the results of other methods.View full abstractDownload PDF (688K) -
Shigemitsu Nakanishi, Yozo Kaifu1968 Volume 25 Issue 5 Pages 1330-1336
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe photoconductivity in CuCl single crystals has been measured with light beam parallel to the applied electric field between 10°K and 150°K; the light beam used is in a form of monochromatic light pulse, the electric field being alternative. The investigation has revealed that in some crystals photoconductivity near 100°K was attributed predominantly to holes while in other crystals holes as well as electrons contributed to photocurrent at all temperatures investigated. Around 30°K excitons produced by the light beam can migrate, before dissociation, through a distance longer than the range of free carriers; however, in some crystals above 50°K the migration distance becomes shorter than the range. Correlations between photoexcited carriers and luminescence of these crystals have also been found.View full abstractDownload PDF (992K) -
Shoji Masunaga, Masakazu Ishiguro1968 Volume 25 Issue 5 Pages 1337-1342
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSAbsorption spectra of RbI:Tl, RbBr:Tl, RbI:Pb, and RbBr:Pb having the CsCl-type lattice structure under high pressures have been observed. At the phase transition from the NaCl-type to the CsCl-type structure, in RbI:Tl, the A band shows a discontinuous red shift and a new absorption band appears on the short wavelength side of the A band. This new absorption band does not show a character of the forbidden line such as the B band. In RbBr:Tl where the electron affinity of halogen ions is large than that in RbI:Tl, however, the A band shows a discontinuous blue shift and there does not appear any new absorption band.
In the case of Pb++ activator ions, at the phase transition, the A band shows a discontinuous red shift and a new absorption band appears in RbI and besides, in RbBr.
These results are discussed on the basis of the possibility of the configuration interaction between the excited states of the activator ions and electron transfer states.View full abstractDownload PDF (704K) -
Kenji Nakao1968 Volume 25 Issue 5 Pages 1343-1357
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe features in the optical spectra of the anisotropic insulating crystals are investigated using the simple crystal and electronic band structures. The discussions are devoted to the morphology of the optical spectra due to the anisotropy of the crystal and band structures and due to the electron-hole interaction in the optically excited state. The range of the electron-hole interaction is taken to be intermediate (i.e., not be completely Coulombic), but the considerably asymptotic behaviours are obtained in this calculation.View full abstractDownload PDF (1968K) -
Koji Ando, Soitiro Tosima1968 Volume 25 Issue 5 Pages 1357-1360
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe motion of a plasma density perturbation in n-InSb at 77°K was investigated experimentally over a wide range of applied electric fields, from the ohmic to the breakdown region. Below breakdown, as is well known, a density perturbation travels to the cathode, in the same direction as that of holes. When the electric field exceeds the critical field for the breakdown, the velocity of the perturbation reaches the maximum value of 4.7×105 cm/sec. As the field is increased further, the velocity decreases through zero, and reverses its direction from that for holes to that for electrons. At the highest field used the velocity reached about −5×105 cm/sec. These observation agrees well with the theory of the plasma density velocity and provides good confirmation for the basis of the hot carrier double injection theory, which was previously based on a proposed velocity reversal in n-InSb.View full abstractDownload PDF (484K) -
Tetsuya Arizumi, Takeshi Aoki, Kiyonori Hayakawa1968 Volume 25 Issue 5 Pages 1361-1369
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSTwo modes of microwave emission from a bar of n-InSb of [110] orientation were observed at 77°K in crossed electric and magnetic fields and were found to trace the threshold curve for the two modes of acoustoelectric current oscillation. These two modes of the microwave emission are closely related to the two modes of the acoustoelectric oscillation. The first mode was observed at a magnetic field less than 2 kG and its minimum threshold electric field for the microwave emission was about 20 V/cm at 400 G. The second mode was observed at fields higher than 2 kG and its minimum threshold electric field for the microwave emission was about 5.5 V/cm at 5 kG. For the first mode the frequency spectrum of the microwave emission was distributed mainly between 3 GHz and 5 GHz, and for the second mode between 20 MHz and 300 MHz. The angular dependence of the transverse magnetic field was different for these two modes. It is shown from these results and the difference between the I–V characteristics that the two modes of the acoustoelectric oscillation and accompanied microwave emission are classified to two regimes, ql<1 and ql>1.View full abstractDownload PDF (1080K) -
Kikuo Ohi1968 Volume 25 Issue 5 Pages 1369-1372
Published: November 05, 1968
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSRefractive indices na, nb and nc of SbSBr have been found to be 2.64, 3.13 and 4.00, respectively, using modified Chaulnes’ method. These values can be explained as being caused by the large electronic polarizabilities of sulfur and bromine.
Absorption coefficients for the light having electric vectors parallel to the [100], [110] and [001] were obtained. Although SbSBr is paraelectric in the measured temperature range of −60∼190°C, non-linear temperature dependence of absorption coefficients was observed. The results are discussed in comparison with those for SbSI.View full abstractDownload PDF (332K) -
Kikuo Cho1968 Volume 25 Issue 5 Pages 1372-1387
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSStructures in the optical absorption line shapes have been investigated for the transitions from orbital singlet to triplet states of defect centers with cubic environment. In the triplet excited states both the spin-orbit and the linear electron-lattice interactions have been taken into account. Under the classical Franck-Condon approximation, line shapes are specified by the combination of the four coupling constants which represent the strengths of the spin-orbit interaction and the Jahn-Teller interaction with one-, two- and three- dimensional lattice vibrational modes. For all the possible combinations of the four coupling constants, optical absorption line shapes have been numerically calculated by means of Monte Carlo integration method with sufficient accuracy. The results can be applied not only to the dipole-allowed transitions (F-bands, U2-bands and C-bands in Tl+-like centers etc.) but also to the dipole-forbidden and vibration-allowed transitions in Oh and Th environment. As an example of the application, Moran’s results for the shapes of the F-bands in cesium halides have been criticized in the light of the present calculation.View full abstractDownload PDF (1556K) -
Kiyoshi Aoyagi, Masako Kajiura, Mitsuo Uesugi1968 Volume 25 Issue 5 Pages 1387-1391
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe dispersion of magnetic circular dichroism in the region of the B lines in ruby has been measured at room temperature. The corresponding theoretical dispersion curves have been calculated by the use of the damped-oscillator shapes for the absorption lines and appropriate g-factors for the ground and excited states. The agreement between the experimental and theoretical curves is excellent, which in turn confirms the validity of the theory now available for magnetic circular dichroism in absorption regions.View full abstractDownload PDF (556K) -
Saiyu Maruyama, Hiroshi Kiho1968 Volume 25 Issue 5 Pages 1392-1405
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSPlasticity of thin crystals has been studied on single crystalline films of gold of about 1000 Å in thickness, prepared by vacuum deposition. The deformation of films was made by stretching a substrate (Mylar) on which the films were fixed, and then examined in an electron microscope. When the stress was applied in ⟨100⟩ direction, extension of stacking faults and/or of thin twins resulted. While, under the stress in ⟨110⟩ direction, mechanical twins up to several microns in breadth were produced. In the broadened twin bands, slipping and secondary twinning were very active resulting in parting of the films, whereas slip in the matrix was only subsidiary. The mode of deformation is interpreted in terms of the resolved shear stress for each partial dislocation, which borders the fault, and in taking account of the effect of intersection between extended faults. The estimation of twinning stress does not conflict with the successive nucleation of twin dislocations.View full abstractDownload PDF (4708K) -
Tadao Ishii, Yoshio Inuishi1968 Volume 25 Issue 5 Pages 1406-1413
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe small signal power theorem is applied to drifting carriers and elastic waves in three dimensions, commencing with Maxwell-Minkowski’s equations, which include the effects of an external dc magnetic field as well as those of collisions and compressibilities. Consequently the findings reveal the clear informations of the power transfer among the systems concerned.
The theory is applied to learn a give-and-take on gain mechanisms in one dimension in piezoelectric semiconductors as an example, subjected or not to an external dc magnetic field, where a role of each system in power distributions is discussed. Especially the definition of the threshold field involved in an amplification of elastic waves and electromagnetic waves are suggested and argued in contrast with an attenuation constant.View full abstractDownload PDF (760K) -
Jimpei Harada, Turid Pedersen1968 Volume 25 Issue 5 Pages 1413-1418
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe anisotropic temperature parameters of tetragonal BaTiO3 are studied theoretically on the basis of thermal diffuse X-ray scattering, and the effect of piezo-electricity is particularly noted. The calculations of the average temperature parameters along the a- and the b-axis respectively are B11P=0.69 and B33P=0.20 (in Å2 units) in the unclamped case and B11E=0.72 and B33E=0.29 in the clamped case. These results are then compared with previous experimental results from X-ray (Evans) and neutron diffraction (Frazer).View full abstractDownload PDF (676K) -
Kenjiro Tsutsumi, Hiroo Nakamori1968 Volume 25 Issue 5 Pages 1418-1423
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSAccording to Tsutsumi the X-ray non-diagram line Kβ′ and the asymmetry of the Kα line are derived from the exchange interaction between the electrons of the incomplete 3d shell and those of the incomplete inner shell owing to the emission of the X-rays. Then the variations with valences are expected in the energy differences between the Kβ1 and Kβ′ lines, the intensity ratios of the Kβ′ to Kβ1 lines, and the indices of asymmetry of the Kα line of chromium from the various chromium compounds with different numbers of 3d electrons. Experiments were carried out on these values in question with fluorescent X-ray method. The experimental results support this consideration to the origins of the Kβ′ line and the asymmetry of the Kα line and agree to the order of magnitude with the values calculated from the exchange interaction.View full abstractDownload PDF (1036K) -
K. V. S. Rama Rao, C. R. K. Murty1968 Volume 25 Issue 5 Pages 1423-1427
Published: November 05, 1968
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSZeeman effect of Br79 and Br81 nuclear quadrupole resonance had been carried out at room temperature in single crystals of p-bromophenol and p-bromoaniline. Two inequivalent field gradient systems are observed in both the compounds. The asymmetry parameter of the field gradient is determined to be 0.07±0.03 and 0.08±0.03 for p-bromophenol and p-bromoaniline respectively. The minimum number of the molecules in the unit cell, the orientation of the molecular plane and the C–Br bond characters are estimated in both the compounds.View full abstractDownload PDF (608K) -
Takashi Miyata, Hideo Suzuki, Sigeo Yomosa1968 Volume 25 Issue 5 Pages 1428-1439
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSASMO-SCF-CI calculations on the DNA-bases with both the normal and the tautomeric forms are carried out within the framework of the π-electron approximation and in terms of the Pariser-Parr-Pople approximation. The comparison between the electronic structures of the two forms is systematically made. The electronic structures for the anion, the cation and the first-triplet states of the bases are also calculated by means of the unrestricted Hartree-Fock method. It is shown that there is a close resemblance between the electronic states of the normal bases and those of the tautomeric ones: A↔G*, U↔C*, G↔A* and C↔U*. It is also shown for each of the bases that the excitation to triplet states and the ionization lead to large redistributions of π-electron densities whereas the excitation to singlet states does not. The calculated excitation energies for singlet states are in close agreement with observed ultra-violet absorption date on the lowest three absorption bands.View full abstractDownload PDF (1212K) -
Masao Tomura, Eiji Ishiguro, Noboru Mataga1968 Volume 25 Issue 5 Pages 1439-1446
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe probabilities P of the energy transfer by dipole-dipole interaction from excited pyrene to non-excited perylene in n-hexane were measured by a pulse method. The value of P was found to be approximately proportional to the relative diffusion coefficient D of both molecules above the value D of 3.5×10−5 cm2/sec and to D3⁄4 below that value of D. When D is large both molecules migrate so rapidly that they collide with each other before the excited donor transfers its energy to the acceptor by dipole-dipole interaction. Meanwhile, if D is small, the energy transfer by dipole-dipole interaction takes place from the donor to the distant acceptor before their collision. The experimental results were well analyzed by Yokota and Tanimoto’s calculation.View full abstractDownload PDF (924K) -
Nobuhiko Saitô, Shin’ichi Itô1968 Volume 25 Issue 5 Pages 1446-1451
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe linewidth of the Rayleigh scattered light from flexible polymers is calculated on the basis of Rouse model. In general, the contributions from translational diffusion and intrachain molecular motion are interrelated, but, for usual cases where the size of molecule is comparable to or less than the wave length of the incident light, the result is approximately expressed as a simple superposition of separate effects. The linewidth due to the translational motion decreases with decreasing scattering angle, whereas the linewidth due to the intrachain molecular motion remains constant. The ratio of magnitudes of these two effects is overwhelmingly large, and the effect of intrachain molecular motion seems almost indetectable.View full abstractDownload PDF (572K) -
Narsingh Dass, N. C. Varshneya1968 Volume 25 Issue 5 Pages 1452-1454
Published: November 05, 1968
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSHeat capacity at constant volume, CV, for water has been calculated as a function of volume at different temperatures by two different methods with a view to arrive at more accurate data than found in literature. Discrepancies in results obtained by different methods have been explained. Moreover, the high values of CV and its continuous decrease with the rise of temperature at a fixed pressure and volume may be explained on the mixture model of water.View full abstractDownload PDF (340K) -
Tsuneo Amano1968 Volume 25 Issue 5 Pages 1455-1463
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA negative V″ configuration is obtained by applying l=2 and l=3 helical multipolor fields on a toroidal magnetic field. An analytical and numerical analysis indicates that the negative V″ condition can be achieved in a wide region in this way. The plasma pressure effect on the configuration is also considered.View full abstractDownload PDF (832K) -
W. Strijland, W. Schuurman1968 Volume 25 Issue 5 Pages 1464-1466
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe allowed region for the guiding centre of a charged particle gyrating in a magnetic quadrupole field is investigated. The region consists mainly of a thin shell, near the line of force, around which the particle rotates. For very low values of the generalized angular momentum the allowed region exhibits a bulge near the origin.View full abstractDownload PDF (332K) -
Noboru Shimomura, Kenji Mitani1968 Volume 25 Issue 5 Pages 1467-1474
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe collision-induced instability at the cyclotron harmonics of the ordinary wave is studied under an assumption ν(V)∝Vh, where ν is the electron collision frequency with neutral particles and V the electron velocity, respectively. When the initial distribution of the electron velocities is a spherical shell in velocity space, it is found that the large values of μ=(Larmor radius)×(wave number) relax the restriction of h which leads to the instability and the condition h=3 is sufficient to generate the instability at the higher cyclotron harmonics if μ is chosen suitably. Furthermore, the growth rate increases with the electron density for given ν and h, and it attains the maximum at ωp\gtrapproxωc, where ωp and ωc are the plasma and the cyclotron frequencies, respectively.View full abstractDownload PDF (632K) -
Kunihiro Suzuki1968 Volume 25 Issue 5 Pages 1474-1484
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSNonlinear characteristics of the collision-induced instability of partially ionized gases which have a large Ramsauer effect are investigated. Right-handed polarized waves propagating along the external magnetic field are considered. Calculations are made on the nonlinear interactions between waves of different wave numbers, using the assumption that the velocity distribution function of electrons stays a delta function in the course of time. The results show that in contrast to the nonlinear Landau damping of plasma waves where the energy flow is directed towards the region of small k, in the present case the wave energies transfer towards the lower frequency side as seen from the coordinate system rotating with the gyrating electron.View full abstractDownload PDF (916K) -
Kazunari Ikuta1968 Volume 25 Issue 5 Pages 1484-1495
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThis paper exhibits a new toroidal system having the average minimum B-field without buried conductors. The existence of the closed nested surfaces is shown by the averaging method. A systematic analysis for the relations between rotational transform angle, well depth and mirror ratio along field lines is made by numerical computation. The configuration with the modest well depth and the appreciable rotational transform angle is found, although the requirement for deep well depth contradicts with that for large rotational transform.View full abstractDownload PDF (904K) -
Mieko Arakawa, Yaso’o Matunobu1968 Volume 25 Issue 5 Pages 1495-1499
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSExperiments were performed concerning the axisymmetric steady motion of a liquid drop through viscous, immiscible liquids filled in a circular cylinder, especially observation of the shape of the drop interface was made at small Reynolds numbers ranging from 1.0×10−3 to 3.0. The drop defroms into a fore-and-aft asymmetrical form, as λ becomes large, λ being the ratio of transversal maximum diameter of the drop to inner diameter of the circular cylinder. In order to describe the drop deformation, two parameters τ and N are adopted; τ is the aspect ratio and N is the ratio of the radii of curvature at the rear and the leading ends. Relations between those parameters and λ, Reynolds number and Weber number are examined. Further, it is found that the given λ, there exist critical values of Weber number below which deformation cannot be observed.View full abstractDownload PDF (564K) -
S. G. Gangoli, Rais Ahmed, M. Pancholy1968 Volume 25 Issue 5 Pages 1500-1506
Published: November 05, 1968
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe blackening of photographic films produced by ultrasonic irradiation has been measured varying such parameters as speed of the film, moistening liquid and temperature. The changes in the emulsion due to absorption of liquid have been estimated. The relative intensities of sonoluminescence have been measured in different liquids and in case of water, they have been measured at different temperatures. The results do not support the mechanism which attributes blackening to the direct action of ultrasonics on the silver halide grains of the emulsion. The blackning of the film is attributed to secondary effects, like sonoluminescence, accompanying cavitation.View full abstractDownload PDF (876K) -
Ken Abe, Eiji Tanaka, Nobuaki Kawamura, Masaaki Kanazawa, Naoshi Mutsu ...1968 Volume 25 Issue 5 Pages 1507
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (128K) -
Masao Shimizu, Hideji Yamada1968 Volume 25 Issue 5 Pages 1508
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (140K) -
Mototaka Okazaki, Kenzô Kai, Takurô Nakamichi, Mikio Yamam ...1968 Volume 25 Issue 5 Pages 1509-1510
Published: November 05, 1968
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (172K) -
Yasukage Oda, Kunisuke Asayama1968 Volume 25 Issue 5 Pages 1510
Published: November 05, 1968
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (164K) -
Yuji Sawatari1968 Volume 25 Issue 5 Pages 1511
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (136K) -
Yutaka Ishihara, Ichiroh Nakada1968 Volume 25 Issue 5 Pages 1512
Published: November 05, 1968
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (164K) -
Sai Sakai, Masazumi Yoshida, Hiroyuki Mitsudo, Yuzuru Ooshika1968 Volume 25 Issue 5 Pages 1513
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (164K) -
Noriko Nishimaki1968 Volume 25 Issue 5 Pages 1514
Published: November 05, 1968
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (128K) -
Tokihiro Ueno1968 Volume 25 Issue 5 Pages 1515
Published: November 05, 1968
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (124K) -
Hideaki Ikoma1968 Volume 25 Issue 5 Pages 1516
Published: November 05, 1968
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (136K) -
K. Enami, S. Nenno1968 Volume 25 Issue 5 Pages 1517
Published: November 05, 1968
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (464K)