巻号一覧
34 巻 (1973)
- 6 号 p. 1431-
- 5 号 p. 1115-
- 4 号 p. 845-
- 3 号 p. 571-
- 2 号 p. 285-
- 1 号 p. 1-
34 巻, 4 号
選択された号の論文の56件中1～50を表示しています
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Abdul Ghani, Atika Rubbani1973 年 34 巻 4 号 p. 845-847
発行日: 1973/04/05
公開日: 2007/05/29
ジャーナル 認証ありIt is proposed that the fissioning nucleus, at the instant before scission, can be represented by the two fragment nuclei interacting through a thin neck having the most probable structure of a deuteron.
As the first approximation, the charge density of both the fragment nuclei is considered to be the same as determined by the electrons-nuclei scattering data. At scission the proton from the neck coalesces with the light fragment to release the maximum possible energy in the transition. The model gives the most probable charge values, Zp, which are consistent with the recent compiled results of Wahl et al. and the weighted average values given by pappas et al. The model also proposes the mechanism of the charge dispersion phenomenon.抄録全体を表示PDF形式でダウンロード (420K) -
Isao Tanihata, Tadanori Minamisono, Akira Mizobuchi, Kenzo Sugimoto1973 年 34 巻 4 号 p. 848-852
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありHalf lives of positron decays of 25Al, 29P, 33Cl, and 41Sc, have been determined to be (7.177±0.023)s, (4.149±0.005)s, (2.513±0.004)s, and (0.591±0.005)s, respectively. Each object activity was produced at a resonance energy of the proton-capture reaction to minimize the contamination due to other activities. The ft values of mirror β decay for 11≤A≤41, which were calculated by using a refined wave function of electron and the recent data, are presented.抄録全体を表示PDF形式でダウンロード (628K) -
Kazumasa Miyano1973 年 34 巻 4 号 p. 853-856
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありCross sections for the formations of 7Be, 22Na and 24Na from proton bombardment of 27Al were measured. A stack of aluminium foils was bombarded with 52 MeV protons. The reaction cross sections were calculated from the yields of the characteristic γ rays from the residual activities. Gamma rays were detected with a Ge(Li) detector. The cross sections for the 27Al (p, αd) and (p, αpn) reactions near the thresholds were obtained and their absolute values were found to be explained in terms of evaporation process.抄録全体を表示PDF形式でダウンロード (532K) -
Kiyoshi Kawade, Hiroshi Yamamoto, Kiyosumi Tsuchiya, Toshio Katoh1973 年 34 巻 4 号 p. 857-864
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありDecay of 168Ho has been studied with Ge(Li), NaI(Tl), and plastic detectors in singles and in coincidence. Sources were prepared by the 168Er(n, p)168Ho reaction with 14.8 MeV neutrons. Thirty-three gamma-rays were observed and twenty eight of them were assigned in a proposed decay scheme, including three new levels at 2192.7, 2254.4 and 2425.7 keV. The half-life was measured to be 2.98±0.09 min. The observation of a 1.92±0.10 MeV beta group in coincidence with a 821 keV gamma transition establishes the total beta-decay energy as 27.4±0.10 MeV. There is good agreement between beta-decay branching ratios to the gamma band and predictions from the adiabatic symmetric-rotor model. A value of 0.0313±0.0025 for the band-mixing parameter z2 was calculated from the E2 branching ratios for transitions between the gamma band and the ground-state band in 168Er.抄録全体を表示PDF形式でダウンロード (944K) -
Hideshige Kusakari, Teruo Suehiro, Masayasu Ishihara, Hirokane Kawakam ...1973 年 34 巻 4 号 p. 865-873
発行日: 1973/04/05
公開日: 2007/05/29
ジャーナル 認証ありExcited levels of 62Zn were studied by means of the (p, t) reaction at 51.9 MeV and of the in-beam gamma-ray spectroscopy using the 63Cu(p, 2nγ)62Zn reaction. The triton angular distributions in 64Zn(p, t)62Zn and the gamma-ray spectra in 63Cu(p, 2nγ)62Zn were obtained. Twenty excited levels up to 5.56 MeV of 62Zn were observed at the excitation energies of 0.954, 1.805, 2.186, 2.38, 2.75, 2.80, 3.22, 3.44, 3.78, 3.93, 4.00, 4.16, 4.32, 4.60, 4.75, 4.86, 5.02, 5.09, 5.40 and 5.56 MeV. The excited states at 0.954, 1.805, 2.186, 2.38, 3.22, 3.44, 3.93, 4.32 and 5.02 MeV were concluded to have Jπ of 2+, 2+, 4+, 0+, 3−, 2+, 0+, 3− and 4+, respectively. The branching ratio in the decay of the second 2+ state was determined as I(22+→21+)⁄I(22+→0g. s.+)=60⁄40. The nuclear properties of the low-lying states of 62Zn are discussed in detail in comparison with other nuclei in this regeon.抄録全体を表示PDF形式でダウンロード (892K) -
Carmen Gil, Kusuo Nishiyama, Toru Nomura, Toshimitsu Yamazaki, Kazumas ...1973 年 34 巻 4 号 p. 874-879
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありA new short-lived isomer in 114Sb was found by using the technique of the in-beam gamma spectroscopy. Two new gamma rays at energies of 96 keV and 326 keV, decaying with a half-life of 275±20 μ sec, were found. A ratio of the intensities of the 326 keV gamma ray to that of the 96 keV gamma ray was obtained to be 1.0:0.34. The character of the 326 keV gamma ray was deduced to be an E3 transition and was found to be enhanced 6.9 times than the single particle estimate. The 96 keV transition was concluded to be an E2 transition. A decay sequence of 8−−326 keV (E3)→5+−96 keV (E2)→3+ (ground state of 114Sb) may be proposed. The observed enhancement of the E3 transition is explained in terms of a mixture of the E3 core polarization.抄録全体を表示PDF形式でダウンロード (576K) -
A. V. Narasimham, B. Manikiam1973 年 34 巻 4 号 p. 880-881
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありIt is found that the existing equations for the bulk viscosity coefficient of a liquid have to be suitably modified in order to suit the experimental data of ultrasonic absorption and dispersion. The modification is effected by introducing a dimensionless quantity, the values of which are evaluated for a few organic liquids by comparison with experimental data. Temperature variation of this parameter is also studied. Ultrasonic relaxation times are also evaluated and their variation with temperature is discussed.抄録全体を表示PDF形式でダウンロード (240K) -
Ichiya Sadakata, Eiichi Hanamura1973 年 34 巻 4 号 p. 882-887
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありThe optical absorptions in the system with a single half-filled narrow band are studied in the metal-insulator transition region. It is shown that the system shows a strong absorption near the frequency I⁄h for both the metallic and insulating states, where I is the intra-atomic Coulomb repulsion.抄録全体を表示PDF形式でダウンロード (692K) -
Yoshihiro Ishibashi, Shuichi Ohya, Yutaka Takagi1973 年 34 巻 4 号 p. 888-891
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありA theory of the antiferroelectric phase transition of copper formate tetrahydrate crystals is presented. In the consideration of entropy the dimer condition imposed on the proton configuration is taken into account. It has turned out that by the suitable choice of parameters for the orientational energy and the dipole interaction energy, the first order antiferroelectric phase transition and the experimental values of T0 and Ta can be satisfactorily explained.抄録全体を表示PDF形式でダウンロード (380K) -
Akiko Ohno1973 年 34 巻 4 号 p. 892-896
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありThe dynamics of the Ising-spin system, whose time evolution is governed by the Glauber type master equation, but with fluctuating parameters, is investigated using the molecular field approximation. If the fluctuation of the environment is very fast, the response of the system becomes Debye type. But in the case of slow fluctuation, deviation from a Debye type response is observed.抄録全体を表示PDF形式でダウンロード (552K) -
Seitaro Matsuo, Tomoji Yamada, Mikio Tsuji1973 年 34 巻 4 号 p. 897-902
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありThe dispersion and the attenuation of the cyclotron (or high frequency) waves in metals are calculated. It is shown that there are an upper and a lower limits in the wave numbers of the propagating waves in metals with the Fermi surfaces deviated from ellipsoid even if the relaxation times are infinite. The line shapes of the surface impedances are also calculated and show anomalies concerning with the extremum orbit and the limiting point resonances.抄録全体を表示PDF形式でダウンロード (592K) -
Monisha Bose, Manoranjan Bhattacharyya1973 年 34 巻 4 号 p. 903-907
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありThe rare-earth orthophosphates display rather interesting magnetic behaviour. Though Wang and Feigelson from susceptibility studied of anhydrous GdPO4, TbPO4 and DyPO4 reported that these substances order antiferromagnetically at rather high temperatures (TN>200 K), neutron diffraction results on TbPO4 and DyPO4 conclusively demonstrated that these two compounds order at helium temperatures only. However, to understand the anomaly in the susceptibility curve in the high temperature region, nuclear magnetic resonance studies of P31 nuclei of GdPO4, TbPO4 and DyPO4 have been carried out in this temperature range. The shifts of the P31 resonance lines are very small (∼0.5%). Interestingly, plots of line-width vs temperature, and shift vs temperature of all the three phosphates simulate the susceptibility curves of Wang and Feigelson. This possibly arises from a phase transition. The lines in the case of Terbium and Dysprosium phosphates asymmetric (exhibit so called structure) and are indicative of anisotropic magnetic interaction.抄録全体を表示PDF形式でダウンロード (532K) -
Shigemi Nagase, Hiroshi Watanabe, Takeshi Shinohara1973 年 34 巻 4 号 p. 908-910
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありMagnetic measurements have been made of the system FexMn2−xP. With x>1.35 and x<0.65 the crystal structure is hexagonal Fe2P type, while for 0.65<x<1.35 it is orthorhombic ZrFeP type. The hexagonal phase with x>1.35 is ferromagnetic if x is close to 2, but becomes antiferromagnetic as x decreases, even though the paramagnetic Curie temperature remains positive. The hexagonal phase with x<0.65 is antiferromagnetic with the Néel temperature TN at 140 K for x=0 (Mn2P). The orthorhombic phase is also antiferromagnetic with TN at 320 K for x=1 (FeMnP).抄録全体を表示PDF形式でダウンロード (356K) -
Takashi Suzuki, Yasuo Yamaguchi, Hisao Yamamoto, Hiroshi Watanabe1973 年 34 巻 4 号 p. 911-916
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありA neutron diffraction study on the powder samples of FeMnP has been made in order to determine the magnetic structure as well as the ordering of iron and manganese atoms. It is ascertained that iron and manganese atoms occupy the tetrahedral and pyramidal sites, respectively. FeMnP is antiferromagnetic with the Néel temperature at 340 K. The magnetic unit cell is twice as large as the chemical unit cell, being doubled along the c-axis. The magnetic structure as derived on the basis of Bertaut’s method is such that Ax and Gz modes are simultaneously present in this compound. In combination with the Mössbauer effect measurement, the magnetic moments of the iron and manganese atoms at 128 K are found to be 0.5 and 2.6μB, respectively.抄録全体を表示PDF形式でダウンロード (664K) -
Jun Nakai, Satoru Kunii, Eiji Hirahara1973 年 34 巻 4 号 p. 917-924
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありAntiferromagnetic resonances for the bulk and thin film samples of europium telluride single crystal have been performed at the frequencies of 9.20 and 33.99 GHz. Angular dependences of resonance field in the cases of external field applied in and out-of the (111) plane are investigated. The easy and hard directions of the small anisotropy in the (111) plane are determined as ⟨112⟩ and ⟨110⟩, respectively.
Frequency diagram is obtained in symmetrical by scaling the modified field (1+κ2)1⁄2·H0 as an abscissa.
Temperature dependences of resonance field are measured in temperatures above and below the Néel temperature, and the temperature dependence of anisotropy energy constants in the (111) plane is obtained. Its noticeable result is that the anisotropy energy constants in the (111) plane decrease with the decreasing temperature.抄録全体を表示PDF形式でダウンロード (1108K) -
Masutaro Hayase, Masayuki Shiga, Yoji Nakamura1973 年 34 巻 4 号 p. 925-931
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありThermal expansion measurements were made on f.c.c. Fe–Ni and Ni–Cu alloys from liquid helium temperature up to 1000 K. The spontaneous volume magnetostriction of these alloys at 0 K evaluated from their thermal expansion curves can be quantitatively explained on the basis of the collective electron model, using the density of states curve for nickel. The lattice constants of these alloys at various temperatures evaluated from their thermal expansion curves deviate from Vegard’s law in the Invar region. This deviation is discussed in connection with the magnetic state of the Invar alloy and with the origin of the Invar effects.抄録全体を表示PDF形式でダウンロード (916K) -
Tadashi Mizoguchi, Masako Akimitsu, Soshin Chikazumi1973 年 34 巻 4 号 p. 932-933
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありThe ferrromagnetic Curie temperatures were measured for ordered and disordered phases of Fe1−xPtx (0.25≤x≤0.30). The effect of atomic ordering on the Curie temperature was discussed by a pair-interaction model. It was concluded that Fe–Fe pair interaction is negative when only the nearest neighbor pair interactions were taken into account.抄録全体を表示PDF形式でダウンロード (276K) -
Motoyuki Tanaka, Yoshiro Kondo1973 年 34 巻 4 号 p. 934-941
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありA formalism to obtain double-time Green functions is developed for a magnetic spin system with two sublattices in the presence of the one-ion type uniaxial anisotropy. Using identities for spin operators a set of equations for Green functions is solved formally for general spins. Explicit expressions of them are given for an antiferromagnet with S=1 and effects of the anisotropy to magnetic properties of this system are investigated in detail. The results thus obtained may be applicable to an entire range of magnitude of the anisotropy constant. Effects of the anisotropy to the critical temperature and excitation spectrum of the system at low temperatures are discussed in comparison with other theories. A brief comment on temperature variation of the second moment of EPR line due to the anisotropy is also given.抄録全体を表示PDF形式でダウンロード (984K) -
Yoshinori Takahashi, Masao Shimizu1973 年 34 巻 4 号 p. 942-951
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありThe orbital and spin magnetic susceptibilities of liquid metals are calculated by Green’s function method in the ladder approximation for the electron-ion potential. The dependence on the wave number of the spin paramagnetic susceptibility is obtained up to the square term of the wave number. By using the observed results of the structure factor and the pseudopotential form factor for all alkali and Al liquid metals, the orbital and spin susceptibilities are numerically calculated just above the melting temperature. By taking into account the enhancement in the spin susceptibility, a satisfactory agreement between the calculated and observed results of the total magnetic susceptibilities for Na, K, Rb, and Al liquid metals is obtained. The disagreements for Li and Cs liquid metals are discussed.抄録全体を表示PDF形式でダウンロード (1052K) -
Jun Kida, Takashi Watanabe1973 年 34 巻 4 号 p. 952-958
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありFrom the results of magnetic susceptibility, magnetization and specific heat measurement for orthorohmbic (NH4)2MnF5, the characteristics of one dimensional antiferromagnetic chain are found for this substance, but it has the finite Néel temperature TN=7.5 K. The magnetic anisotropy in the temperature region 20 K∼120 K is studied on the model of classical spins with isotropic coupling in an axial crystalline field. The exchange and the crystalline field parameters are determined to be J=12.2 K and D=3.31 K. Weakferromagnetism in the ordered state is well explained by these parameters on the basis of a canting crystalline field model. Three dimensional spin configuration below TN is decided to be Pnmá, which gives the observed weakferromagnetism.抄録全体を表示PDF形式でダウンロード (756K) -
Michisuke Kobayashi, Kazuo Yamada1973 年 34 巻 4 号 p. 959-964
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありRenormalizations of the sound velocity and deformation potential of bismuth with anisotropic Fermi surface, through the polarization effects by the Coulomb interaction, are carried out in the random phase approximation. The singuralities which did not appear in the isotropic model come out in the phonon spectra. It is shown that the anomalous behavior occurs in a region of short wave lengths of phonon, assuming that both directions of phonon wave vector and of magnetic field are parallel to the trigonal axis.抄録全体を表示PDF形式でダウンロード (688K) -
Kenji Hiraga, Makoto Hirabayashi1973 年 34 巻 4 号 p. 965-972
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありThe crystal structure of interstitial solid solutions of vanadium with 14–23 at % oxygen has been determined by X-ray and electron diffraction. It is shown that the oxygen atoms occupy regularly the octahedral interstitial sites, forming a body-centered tetragonal superlattice of which the stoichiometry is approximately V16O3. The unit cell contains a 4×4×2 array of b.c.t. metal subcells with the axial ratio larger than unity. Both the cell dimensions of superlattice and sublattice increase of oxygen concentration. The superstructure is formed 400°C and transforms to another b.c.t. structure with preferential occupation of oxygen atoms like the Fe–C martensite above that temperature.抄録全体を表示PDF形式でダウンロード (876K) -
Takaaki Hagiwara, Osamu Mizuno, Shoji Tanaka1973 年 34 巻 4 号 p. 973-982
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありElectron tunneling through p-type Te–TeO2–Pb junctions is investigated at the liquid helium temperatures under the magnetic field up to 53 kOe. Phonon effects are observed in the d2I⁄dV2–V characteristics and the energies of El mode and A2 mode phonons of tellurium are determined to be 14 meV and 11 meV, respectively. Structures due to the tunneling through the surface states in the accumulation layer of tellurium are also observed in the sample whose carrier concentration is around 1014 cm−3. The binding energy of the surface state is estimated at about 28 meV in zero magnetic field. It is found that this binding energy increases with magnetic field. This seems to come from the peculiar electronic band structure of tellurium.抄録全体を表示PDF形式でダウンロード (1344K) -
Hiroyasu Shimizu, Masayoshi Umeno, Koichi Wakita, Hiroshi Kameyama, Yo ...1973 年 34 巻 4 号 p. 983-988
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありThe Brillouin scattering in Ca2Sr(C2H5CO2)6 have been studied using Fabry-Perot interferometer. The observed Brillouin shifts for different phonon directions have been assigned to specific modes of vibration. From algebraic expressions for the velocities, six elastic constants at 23°C have been calculated for the hypersonic region. The determined values of elastic constants in units of 1010 dyn/cm2 are C11=11.6, C33=10.1, C44=3.47, C66=1.95, C12=6.66, and C13=5.49. The temperature dependence of the Brillouin shift has been studied with particular emphasis on the region close to the Curie temperature. These results are compared with those in the ultrasonic region.抄録全体を表示PDF形式でダウンロード (656K) -
Yoshiko Fujibayashi1973 年 34 巻 4 号 p. 989-993
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありThe magnetic field dependences of the Hall coefficient R and the magnetoresistance of thin graphite crystals have been measured at 77 K for film thickness ranging from 180 to 1600 Å. As the crystal thickness decreases, the magnetic field dependence of R which is negative below 10 kOe becomes weak and finally R is nearly constant for crystals of about 180 Å thickness. The magnetoresistance as a function of the field is always positive, varying approximately H1.3−1.6 depending upon the thickness. Using McClure’s method, it is concluded that there are four kinds of carriers, the mobility values of which are nearly proportional to the thickness below 500 Å. The number of total electrons is always greater than that of holes in the whole range studied.抄録全体を表示PDF形式でダウンロード (644K) -
G. Chakrapani, V. V. S. Sarma, C. R. K. Murty1973 年 34 巻 4 号 p. 994-996
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありZeeman effect investigations for Cl-35 nuclear quadrupole resonance were carried out at room temperature in single crystals of 4, 4′ dichloro diphenyl sulphone. Two field gradient Z-directions were observed in this compound for Cl-35 nucleus. The asymmetry parameter of the electric field gradient system is found to be 0.22±0.03. Orientation of the field gradient directions in the crystallographic co-ordinate system were also determined and compared with the results obtained from X-ray and Neutron diffraction data available for this substance. Percentage single, double and ionic bond characters for C–Cl bond were also estimated.抄録全体を表示PDF形式でダウンロード (376K) -
Shoji Kashida, Ichiro Hatta, Akira Ikushima, Yasusada Yamada1973 年 34 巻 4 号 p. 997-1001
発行日: 1973/04/05
公開日: 2007/05/29
ジャーナル 認証ありThe sound velocities in BaTiO3 has been observed near its paraelectric to ferroelectric phase transition point. The anomalous part of the sound velocity of the longitudinal wave propagating along [100] direction depends on temperature as A[(T−T0)⁄T0]−ζ with ζ=0.41 and A=1.79×104 cm·sec−1, where T0 is the paraelectric temperature. The critical index ζ is close to the theoretical value of 1/2 as predicted by Dvo\v{r}ák. On the other hand, the velocity of the transverse wave does not show any appreciable critical behavior. The value of A is also compared with the theory given by Dvo\v{r}ák. The observed curve for the longitudinal wave is in good agreement with the theoretical curve, while that for the transverse wave shows a notable discrepancy.抄録全体を表示PDF形式でダウンロード (676K) -
R. Cavalheiro, M. M. Shukla1973 年 34 巻 4 号 p. 1002-1005
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありThe vibrational spectrum and lattice heat capacities of lead are calculated on the basis of the extended de Launay’s model for cubic metals. The phonon dispersion curves along three principal symmetry directions, namely [100], [110] and [111], as well as (θ−T) curves are presented and compared with experimental results. A reasonable agreement is exhibited between the theory and the experiment.抄録全体を表示PDF形式でダウンロード (440K) -
Gautam Bose, B. B. Tripathi, H. C. Gupta1973 年 34 巻 4 号 p. 1006-1013
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありAn angular force model, which includes central forces and the de-Launey type angular forces, has been developed for studying the harmonic properties of the hexagonal close packed lattices. Three metals Be, Mg and Zn have been studied and the phonon dispersion, frequency spectra and the specific heats have been computed and compared with the experimental data. The agreement between theory and experiment is good for Mg, fair enough for Be but rather poor for Zn.抄録全体を表示PDF形式でダウンロード (664K) -
Yoshihiro Takahashi, Masao Tomura1973 年 34 巻 4 号 p. 1014-1019
発行日: 1973/04/05
公開日: 2007/05/29
ジャーナル 認証ありA new emission different from the usual excimer emission in pyrene crystal was found at low temperature. Also, an emission at shorter wavelength than the excimer emission band at room temperature was found to originate from the intrinsic monomer structure in the crystal surface. Furthermore, the transfer probabilities of the excitation energies corresponding to the new emission at low temperature and the emission at shorter wavelength than the excimer emission at room temperature to doped perylene molecules were observed by a pulsed method and their temperature dependences were obtained. By the analysis of these results the diffusion coefficient D of the migration of the excitation energy of the former emission was obtained as D=D0exp(−E⁄kT) (D0=1.5×10−4 cm2sec−1 and E=0.003 eV). On the other hand, the diffusion coefficient D of the excitation energy of the latter emission was given by D=3.6×10−4T−1⁄2.抄録全体を表示PDF形式でダウンロード (740K) -
C. Fred Moore, David K. Olsen, Joseph Mcwherter, Patrick Richard1973 年 34 巻 4 号 p. 1020-1021
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありA beam of 30 MeV oxygen ions was used to excite silicon atoms in both a silicon crystal and in a silicon dioxide crystal. The resulting K X-ray spectra show marked deviation from one another.抄録全体を表示PDF形式でダウンロード (196K) -
Fumihiro Koike, Tsutomu Watanabe1973 年 34 巻 4 号 p. 1022-1028
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありFano’s theory on configuration mixing was applied to investigate negative oxygen molecular ion formation in low energy (less than 1 eV) electron collision: e+O2→O2−*. A cross section formula is obtained. It is found essentially equivalent to Breite-Wigner’s one-level formula used by Herzenberg. By the evaluation of the transition matrix element, the mechanism of electron capturing process is investigated and the capture cross section has been expressed in a more explicit form. Attention is paid to two types of transition. Landau-Zener type transition can occur at the crossing point between the adiabatic potentials of e+O2 and O2− systems. Another type of transition can occur through the non-adiabatic coupling between the molecular electronic and vibrational states. Either or both of these can play an important role on the transition mechanism. Integrated capture cross section and resonance width of O2−* state are found to be 0.012 a02·eV and 4 μ eV, respectively, at 82 meV electron impact (first resonant vibrational level of O2−* (v′=4)).抄録全体を表示PDF形式でダウンロード (996K) -
Ryuzo Koyama1973 年 34 巻 4 号 p. 1029-1038
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありThe angular distribution of scattered light (or the particle scattering factor) of the stiff chain polymers is calculated by assuming an appropriate Fourier transform of the distribution function of this polymer chain. For very small and very large scattering angles the result is respectively reduced to the forms of the Debye’s scattering factor for random coil chain and to that for rigid rod molecule.
By assuming that the polymer chain expansion by intramolecular forces is uniform, but the contour length is kept as constant the excluded volume effect on the angular distribution is calculated. The result shows that the transition point of scattering curve which gives a boundary between random coil- and rigid rod-scatterings is inversely proportional to the square of molecular expansion coefficient. This is in qualitative agreement with the recent experimental results by Wada and others.
An approximate distribution function which gives the correct second and fourth moments of the chain end to end distance is also calculated.抄録全体を表示PDF形式でダウンロード (1084K) -
Masuhiro Yoshino, Jun Takeuchi, Hirosi Suzuki1973 年 34 巻 4 号 p. 1039-1044
発行日: 1973/04/05
公開日: 2007/05/29
ジャーナル 認証ありAbsorption cross sections and photoionization efficiencies of benzene and styrene vapor have been measured in the wavelength regions of 600–2200 Å and of 600–1000 Å, respectively. Strong absorption peaks ascribed to the π-electron transition 1A1g→1E1u have been observed at 1790 Å for benzene and at 1960 Å for styrene. Corresponding oscillator strengths are 0.91 and 0.62, respectively. A strong and broad continuum with its maximum at about 700 Å has been observed for both benzene and styrene; cross sections around the maximum are 140 and 180 in unit of 10−18 cm2, respectively.
Energy-loss spectra for styrene vapor have been deduced from the present results and compared with previous data on the solid polystyrene. It is pointed out on the basis of the above results, that the transitions at the energy-loss of 6.5–7 eV and of 20 eV can be interpreted as due to a molecular excitation and a photoionization process, respectively, and that the previous assignments as due to collective excitations are unnecessary.抄録全体を表示PDF形式でダウンロード (912K) -
Hideo Suzuki, Tohru Sugimoto, Kei Nakachi1973 年 34 巻 4 号 p. 1045-1053
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありThe optical properties of the models for phytochrome chromophore proposed by Crespi et al. and Rüdiger-Correll, as well as those of bilidiene and bilitriene, are examined within the framework of the π-electron approximation, using the ZDO approximation of LCAO–ASMO–SCF–CI theory. The interaction between chromophore and protein moiety in phytochrome is also examined, assuming the electric field produced by the latter to be constant. Moreover, the Coulomb interaction of the chromophore with the aromatic amino acid residue is studied by the dipole approximation, regarding the residue as tryptophan.
It is thus shown that the unique optical absorption of phytochrome in the visible region cannot be explained by any model so far presented, as long as their π-systems are assumed to have no ionic structure.抄録全体を表示PDF形式でダウンロード (1048K) -
Eisaku Iizuka1973 年 34 巻 4 号 p. 1054-1058
発行日: 1973/04/05
公開日: 2007/05/29
ジャーナル 認証ありA couple of parallel-plate electrodes have been made of Nesa glass. NMR spectra of liquid-crystalline solutions of poly-γ-benzyl-L-glutamate in static electric fields obtained using these electrodes are reliable. The signal of a solvent molecule such as dichloromethane or dibromomethane splits into a doublet owing to magnetic dipole-dipole interactions as in the case of the magnetic orientation of these solutions, indicating that the solvent molecules orient in the direction of the electric field. Dilute liquid-crystalline solutions which still do not contain isotropic portions evidently have a strong center signal showing presence of free solvent molecules. Orientation of the solvent molecules is apt to be disturbed by a weak electric current through the solution and magnitude of the steady-state separation of the doublet can not be used as a measure for the polymer (and molecular cluster) orientation.抄録全体を表示PDF形式でダウンロード (640K) -
Yasuyuki Nogi, Tetsu Miyamoto1973 年 34 巻 4 号 p. 1059-1065
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありIt is shown that the initial wall hanging current of a theta pinch can be separated from the discharge tube wall by the multipole cusp field. The radial distribution of the azimuthal current was measured by several magnetic probes arranged radially. Under our experimental conditions the plasma current of the initial phase was clearly separated everywhere from a wall at 20 mTorr. The separation was incomplete at higher pressure because of the large reversed field. The average radial magnetic pressure of the multipole field and the condition to separate the plasma current from the tube wall were derived from the simple model that the plasma was the cylindrical column of the perfect conductivity. The experimental results well agreed with the estimation based on this model.抄録全体を表示PDF形式でダウンロード (820K) -
Yoshinobu Matsukawa1973 年 34 巻 4 号 p. 1066-1072
発行日: 1973/04/05
公開日: 2007/05/29
ジャーナル 認証ありStudies on the temperature measurement of high energy electrons produced by a turbulent heating and by a beam plasma discharge are presented. High energy electrons consist of at least two components with different effective temperatures in the plasma after turbulent heating by a large current. One of them gives most of the heated pressure but its number is a few percent of all the initial plasma electrons and its temperature nearly corresponds to the discharge voltage. The other has the temperature higher than the former, and its number is much smaller. In a beam plasma discharge an electron group with the temperature corresponding to about the accelerating energy of electron beam is also produced in the beginning of the discharge. A solid state detector that has high energy resolution to the range of 2∼5 keV is found to be convenient for X-ray measurement in the beam plasma discharge.抄録全体を表示PDF形式でダウンロード (916K) -
Burton D. Fried, Yoshi H. Ichikawa1973 年 34 巻 4 号 p. 1073-1082
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありA direct derivation of the nonlinear schrödinger equation for Langmuir waves is presented, based upon the nonlinear wave packet ansatz of Karpman and Krushkal. Both fluid and Vlasov equation formulations are used. The results obtained are essentially equivalent to those found earlier by Taniuti, et al. using reductive perturbation theory, including the importance of wave particle resonances at the group velocity for the long time behavior of the amplitude of modulated waves. Separating the wave packet considerations from the calculation of the nonlinear frequency shift makes it possible to attack the latter with whatever method facilitates the analysis of that part of the problem. In addition, certain ambiguities concerning singularities in velocity integrations are resolved, and the connection with a well-posed initial value problem is made somewhat clearer. This method can be used equally well for other waves, and may be of help particularly in situations where it is not clear, a priori, what scaling to adopt in applying reductive perturbation theory.抄録全体を表示PDF形式でダウンロード (1248K) -
Yoshihiko Mizumachi, Kyoji Nishikawa, Tetsuji Nishikawa1973 年 34 巻 4 号 p. 1083-1088
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありA highly relativistic bunched electron been accelerated by a linear accelerator is injected into a plasma in the direction parallel to a weak magnetic field. When the plasma frequency is matched to the accelerator frequency (8980 MHz), a strong polarized radiation is observed in the propagation direction perpendicular to the magnetic field. The electric vector of the radiation is perpendicular to the magnetic field and the spectrum is limited to the accelerator frequency. The microwave power received in a horn antenna (0.1 ster.) is about 0.1μW for a 1 mA beam current. The properties of this radiation are consistently explained by assigning it as the coherent \v{C}erenkov emission of the extraordinary waves. The observed power is lower than the value expected from the theory, but this is possibly due to dissipation of waves in the plasma.抄録全体を表示PDF形式でダウンロード (824K) -
Yoshi H. Ichikawa, Takehiko Suzuki, Tosiya Taniuti1973 年 34 巻 4 号 p. 1089-1092
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありA modified nonlinear Schrödinger equation obtained on the basis of the reductive perturbation theory is compared with one obtained by Dewar applying the Lagrangian method. It is shown that the both results agree each other for a special case of the one dimensional electrostatic modes in a collisionless plasma. In a case of the electron plasma wave, the nonlocal nonlinear term of the modified nonlinear Schrödinger equation leads to a modulational instability, which is reduced to the nonlinear Landau damping in the limit of small amplitude.抄録全体を表示PDF形式でダウンロード (428K) -
Masayuki Oikawa, Nobuo Yajima1973 年 34 巻 4 号 p. 1093-1099
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありAn approximate method of studying interactions between two solitary waves which propagate in opposite directions is presented. In the first approximation, the solution is described by a superposition of two solitary waves which are governed by their respective Korteveg-de Vries equation. The second order approximation gives a small correction where the two waves overlap one another. The method is extended to the system, in which there exist n “quasi-simple” waves (the simple waves under the effects of higher derivative terms, such as dispersions of dissipations). The possibility that n “quasi-simple” waves can be superposed to describe nonlinear systems is studied. Applications to ion acoustic waves in collisionless plasmas and shallow water waves are discussed.抄録全体を表示PDF形式でダウンロード (788K) -
Takejiro Kaneko, Shigeto Miura, Masayoshi Ohashi1973 年 34 巻 4 号 p. 1100
発行日: 1973/04/05
公開日: 2007/05/29
ジャーナル 認証ありPDF形式でダウンロード (144K) -
Shin-ichi Ito, Itsuo Mikami, Yutaka Sugita, Satoshi Taniguchi1973 年 34 巻 4 号 p. 1101
発行日: 1973/04/05
公開日: 2007/05/29
ジャーナル 認証ありPDF形式でダウンロード (140K) -
Kunito Okamoto, Takashi Hashimoto, Kazuhiro Hara, Hiroshi Fujiwara, Ta ...1973 年 34 巻 4 号 p. 1102
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありPDF形式でダウンロード (324K) -
Toshihiko Tokunaga, Hatsuo Tange, Mitita Goto1973 年 34 巻 4 号 p. 1103
発行日: 1973/04/05
公開日: 2007/05/29
ジャーナル 認証ありPDF形式でダウンロード (124K) -
Hiroshi Fujiwara, Toshihiko Tokunaga, Atsushi Nakajima1973 年 34 巻 4 号 p. 1104
発行日: 1973/04/05
公開日: 2007/05/29
ジャーナル 認証ありPDF形式でダウンロード (140K) -
Takao Kohara, Kunisuke Asayama1973 年 34 巻 4 号 p. 1105
発行日: 1973/04/05
公開日: 2007/05/29
ジャーナル 認証ありPDF形式でダウンロード (116K) -
Isao Taguchi, Hide Yoshioka1973 年 34 巻 4 号 p. 1106
発行日: 1973/04/05
公開日: 2007/05/29
ジャーナル 認証ありPDF形式でダウンロード (144K) -
Michie Onda, Kazuo Morigaki1973 年 34 巻 4 号 p. 1107
発行日: 1973/04/05
公開日: 2007/06/01
ジャーナル 認証ありPDF形式でダウンロード (140K)