-
Mitsuo Sakai
1969 年 26 巻 4 号 p.
879-894
発行日: 1969/04/05
公開日: 2007/06/01
ジャーナル
認証あり
Low-lying excited levels in
200Hg were investigated with a Ge(Li) gamma-ray spectrometer and with an internal conversion coefficient spectrometer. The spin and parity 2
+ of the 1028.7-keV third excited level were confirmed, based on the internal conversion coefficient and K/L ratio of the transition from this level to the first excited 2
+ state. Several new lines were found. A revised decay scheme was proposed. The experimental results showed that the nuclear structure of this nucleus can be understood fairly well with a model of two-proton holes coupled to harmonic surface vibrations.
抄録全体を表示
-
Takeshi Obokata
1969 年 26 巻 4 号 p.
895-900
発行日: 1969/04/05
公開日: 2007/06/01
ジャーナル
認証あり
Glauber’s one-dimensional Ising model is extended to the case of spin
S=1 by developing the time-dependent constant coupling approximation. It is shown that there exist two relaxation times. The one increases monotonically with decreasing temperature and diverges to infinity at
T=0°K, but the other is very small and scarcely varies with temperature. The dynamical susceptibility is also calculated, which coincides with the rigorous one in static case.
抄録全体を表示
-
Mitsugu Hanabusa, Takashi Yamaguchi
1969 年 26 巻 4 号 p.
901-905
発行日: 1969/04/05
公開日: 2007/05/29
ジャーナル
認証あり
When crystals are distorted periodically by a vibrating force, transitions take place among nuclear Zeeman levels of
Δm=±2 in the rotating frame. This excitation is observed as the reduction in relaxation times of spin-locked magnetization. Unlike ultrasonic excitation in the laboratory frame, the acoustic frequency is low (2
γH1⁄2π), and this fact, together with a high sensitivity to a strain, enables one to determine the electric field gradient-elastic tensors
s accurately. These effects have been demonstrated for Na in NaCl single crystals. Measurements for several orientations of the force and the external magnetic field have yielded
S11=(2.8±0.3)×10
15 statcoul/cm
3 and
S44=−(0.81±0.08)×10
15 statcoul/cm
3. These values are explained by a consideration of overlap effects in addition to ionic point-charges.
抄録全体を表示
-
Kengo Adachi, Kiyoo Sato, Makoto Matsuura
1969 年 26 巻 4 号 p.
906-910
発行日: 1969/04/05
公開日: 2007/06/01
ジャーナル
認証あり
Magnetic property of CrSb
2 having marcasite structure was investigated by means of magnetic, X-ray and neutron diffractions, specific heat and electrical resistivity measurements. The magnetic susceptibility of CrSb
2 showed a maximum at about 550°K and it seems to be antiferromagnetic with a negative paramagnetic Curie point. From neutron diffraction and specific heat measurements, however, it was found that CrSb
2 has no antiferromagnetic spin ordering. The resistivity is semiconductive with two activation energies, 0.14 eV and 0.07 eV below and above 200°K, respectively. Basing on a covalent crystal model, an explanation on the magnetic and the electrical properties were given: that is, the ground state has no magnetic moment (
S=0), but the excited state is paramagnetic (
S=1) with the energy gap of 0.07 eV from the ground state.
抄録全体を表示
-
Hiroyuki Shiba, Hidetoshi Fukuyama
1969 年 26 巻 4 号 p.
910-925
発行日: 1969/04/05
公開日: 2007/06/01
ジャーナル
認証あり
The magnetoconductivity of metals with magnetic breakdown is calculated quantum mechanically. The calculations are done for the weak scattering limit, based on a rigorous treatment of periodic potentials. When the scattering due to impurities is weak and the level broadening is negligibly small, the transverse magnetoconductivity can be described by the “intraband” and “interband” processes in the “magnetic energy band”. As an application of the obtained formulas the transverse magnetoconductivity is calculated on a simple model for the periodic potential—one-dimensional weak cosine potential. The results of our calculations show rather complicated oscillatory behaviors which come from the phase coherence between orbits.
抄録全体を表示
-
Nubuo Mori
1969 年 26 巻 4 号 p.
926-932
発行日: 1969/04/05
公開日: 2007/06/01
ジャーナル
認証あり
The approximate energy bands for Cr, Mo and W metals are built up from the energy bands for the paramagnetic Cr metal, by taking into account the spin-orbit interaction. The effect of the spin-orbit interaction to the paramagnetic susceptibilities for 3
d, 4
d and 5
d b.c.c. transition metals and their alloys are investigated. The spin paramagnetic susceptibilities χ
s and the orbital paramagnetic susceptibilities χ
orb for 3
d metals and their alloys are the largest, followed by those for 4
d and 5
d metals and their alloys in that order, and the mixed contribution due to the spin and orbital angular momentums, χ
so, is negligibly small. The calculated paramagnetic susceptibilities agree with the results of the experiments, by adopting the reasonable values of a molecular field coefficient. The method to analyze the paramagnetic susceptibilities for the alloys composed of 3
d and 4
d, 4
d and 5
d or 3
d and 5
d transition metals is suggested and the experimental results for V–Nb and Nb–Ta alloys are analyzed.
抄録全体を表示
-
Masami Kusunoki, Hideji Suzuki
1969 年 26 巻 4 号 p.
932-938
発行日: 1969/04/05
公開日: 2007/06/01
ジャーナル
認証あり
Phonon scattering by dislocations at liquid helium temperature has been studied by measuring the thermal conductivity of Cu-15 at % Al alloy crystals deformed by various amounts. Curves of lattice thermal conductivity vs. temperature plotted in log-log scale are concave upwards in the temperature range between 1.6∼4.2°K. These experimental data cannot be described by the scattering of phonons by the static strain field around dislocations through anharmonicity. The result is interpreted by assuming resonance scattering due to vibrating edge dislocations in their Cottrell atmospheres in addition to the scattering due to electron-phonon interaction.
抄録全体を表示
-
Kunio Aiki
1969 年 26 巻 4 号 p.
939-947
発行日: 1969/04/05
公開日: 2007/05/29
ジャーナル
認証あり
For the trapped Radicals A, B, C, D and E,
g- and
33S
hf-tensor parameters are determined. Radicals A, B and C have already been identified as SSO
2−, SSO
− and SSO
3− respectively. For Radical A
g-tensor parameters are different from that reported, and these support the model more adequately. Optical absorption of this radical is shown. Observation of
hf-interaction with central
33S of Radical B confirms the reported model. For Radical C at least two sets of nonequivalent
33S
hf-satellites are observed, then the identification of SSO
3− for this radical becomes more reliable. A feature of thermal decomposition of this radical into others is shown. Radical D which has the same chemical formula as SSO
− but has a conformation different from Radical B in the crystal lattice is found.
抄録全体を表示
-
Terumasa Kato, Ryuji Abe
1969 年 26 巻 4 号 p.
948-952
発行日: 1969/04/05
公開日: 2007/06/01
ジャーナル
認証あり
Three species of radicals were observed. One of these was already identified as HN
3\dotCHCOO
− by Ovenall
et al. and by Blinc
et al.. One of the other species, which appears as a triplet with an intensity ratio of 1:2:1, is identified as \dotCH
2COO
−. The principal values of
A- and
g-tensor of the radical are determined to be 25.1, 19.6 and 16.7 gauss and 1.9994, 1.9999 and 2.0009, respectively. From the temperature dependence of the spectra, it is concluded that the two protons in the \dotCH
2COO
− exchange their sites with each other through a rotation of the \dotCH
2 group about the C–C
N bond.
抄録全体を表示
-
Kazuo Gesi
1969 年 26 巻 4 号 p.
953-956
発行日: 1969/04/05
公開日: 2007/06/01
ジャーナル
認証あり
A phase transition in ferroelectric NaNO
2 is found at −95°C from precise measurements of thermal expansion and low frequency dielectric constant. At this transition temperature, slight break exists both in dielectric constant vs. temperature and in thermal expansion vs. temperature curves. Below the transition temperature, the room temperature ferroelectric phase transforms to a high pressure phase which exists above 8 kbar at room temperature.
抄録全体を表示
-
Akira Ishida, Yoshio Inuishi
1969 年 26 巻 4 号 p.
957-963
発行日: 1969/04/05
公開日: 2007/05/29
ジャーナル
認証あり
Acoustic domains in semiconducting CdS are studied by Brillouin scattering measurements at room temperature. Time-variations, spatial distributions and frequency spectra of the generated acoustic flux are revealed experimentally. The propagation of the acoustic flux is separated into regions of exponential growth, steady-state saturation and anomalous damping. Such flux behaviors are not accompanied by the corresponding change of the sample current. The frequency spectra range from 200 to 1200 MHz and change slightly during propagation. Linear acoustic gains in this frequency range agree fairly-well with the theoretical curve of White. However, the acoustoelectric phenomena cannot be explained by these low frequency acoustic waves only. Thus, Brillouin scattering is not always valid to examine the acoustoelectric instabilities because of its frequency limitation (\simeq2.8 GHz).
抄録全体を表示
-
Tetsuo Fukase
1969 年 26 巻 4 号 p.
964-974
発行日: 1969/04/05
公開日: 2007/06/01
ジャーナル
認証あり
Giant quantum oscillations of the magneto-acoustic attenuation in arsenic have been studied for the 140 Mc/sec longitudinal wave and in the magnetic fields up to 93 kG. The observed attenuation peaks are spike shaped with spin splittings. The energy surface parameters and spin splitting parameters for holes on the γ-neck were determined from the attenuation peaks. The splitting above mentioned shows that for the field which is parallel to the trigonal axis, the effective
g-factor is found to be 75. The line shape of the giant quantum attenuation peak has been interpreted in terms of the nonparabolic energy band model and it revealed the hole-mass character typical of the saddle point on the γ-neck.
抄録全体を表示
-
Shigeharu Kabashima
1969 年 26 巻 4 号 p.
975-978
発行日: 1969/04/05
公開日: 2007/06/01
ジャーナル
認証あり
Dielectric constant of single crystals of NiO, both pure and containing small amounts of Li, has been measured in the frequency range from 10
2 to 2.4×10
10 Hz as a function of temperature between 150 and 450°K. At low temperatures the dielectric constant has a constant value independent of temperature, while at high temperatures it increases strongly with arising temperature. This abrupt increase is more conspicuous for highly doped specimens and at lower frequency. The strongly increasing capacitance is considered to be due to a polarization caused by the space charge at the specimen-electrode interface. The apparent dielectric constant can be interpreted by an equivalent circuit somewhat similar to that of rectifier.
抄録全体を表示
-
Eiji Nakamura, Tatsuya Nagai, Shinya Hashimoto, Masahiko Hosoya
1969 年 26 巻 4 号 p.
979-981
発行日: 1969/04/05
公開日: 2007/06/01
ジャーナル
認証あり
Ferroelectric hysteresis loops are observed in the mixed crystals of Ca
2Sr(C
2H
5CO
2)
6(1−x)·(CH
3CO
2)
6x in the range of 0≤
x≤0.17. The Curie temperature decreases remarkably with increasing CH
3CO
2 concentration according to the relation of
Tc(
x)=
Tc(0)−600
x(°C), where
Tc(
x) is the Curie temperature at
x.
抄録全体を表示
-
Satoshi Tanaka, Shigeo Naya
1969 年 26 巻 4 号 p.
982-993
発行日: 1969/04/05
公開日: 2007/06/01
ジャーナル
認証あり
A theory of X-ray diffractions from disordered crystals, which are composed of the polymer molecules of helical structures, is developed. This theory gives the relationships between various disorders in polymer crystals and the diffuse streak diffraction patterns on layer lines as well as Laue-Bragg reflections. The results derived here include those given by Clark and Muus in 1962.
抄録全体を表示
-
Yasuhiko Syono, Syun-iti Akimoto, Kay Kohn
1969 年 26 巻 4 号 p.
993-999
発行日: 1969/04/05
公開日: 2007/06/01
ジャーナル
認証あり
Phase stability relations among four hexagonal perovskite-like structures as well as the cubic perovskite structure have been studied for several oxides (BaMnO
3 and SrMnO
3) and fluorides (CsMnF
3, RbNiF
3 and TlNiF
3) at high pressure. A series of high pressure transformations are found to occur in the order of the packing sequence along the hexagonal
c axis (or cubic 111 axis) of (
ab), (
ababcbcac), (
abac), (
abcacb) and (
abc) with increasing pressure. This order is corresponding with the increasing order of the proportion of the cubic close-packed layers in the hexagonal close-packed structure. It is suggested that the tolerance factor of the perovskite structure and the Coulomb repulsive force play an important role in determining the crystal structure and its order in the series of phase transformations at high pressure.
抄録全体を表示
-
Masayasu Ueta, Yasuhiro Kondo, Masamitsu Hirai, Takehisa Yoshinari
1969 年 26 巻 4 号 p.
1000-1006
発行日: 1969/04/05
公開日: 2007/05/29
ジャーナル
認証あり
The transient formation and decay of
F centers in KCl crystals have been studied using a pulsed electron beam from a linear accelerator. The electron pulse has a 30 ns half width at 60 MeV and the maximum peak current is 1.2 amp. In “as received” crystals
F center formation is of the fast type which takes place in very short time less than the pulse width and generated
F centers bleach partially within ∼40 ns, probably due to the tunneling annihilation with
H centers. In “irradiated” crystals which are discolored and bleached with white light, the
F center formation consists of the fast and slow types. The slow type formation has a time constant of 0.60±0.02 μs at 80°K which is the same as the decay time of the
F center luminescence. The slow type formation is, therefore, considered to take place when an electron is captured by an anion vacancy through the first excited state of the
F center.
抄録全体を表示
-
Atsuo Fukuda
1969 年 26 巻 4 号 p.
1006-1013
発行日: 1969/04/05
公開日: 2007/06/01
ジャーナル
認証あり
Absorption spectra of KI containing high concentrations of Ga
+ and In
+ impurity ions are obtained at 2°K. New absorption bands which are due to the (Ga
+)
2 and (In
+)
2 paired-ion centers are observed at 4.04 and 4.51 eV in KI:Ga and at 3.75 and 4.25 eV in KI:In. The low-energy bands A′ are unambiguously related to the A band and the high-energy bands C′ to the C band. Trials have been made to understand the electronic structure of the paired-ion center in terms of the electronic structure of the single-ion center. The paired-ion-center absorption bands related to the C band are unambiguously assigned as follows: the C′ band is due to the transition
1∑
g+(
1A
1g)→
1∑
u+(
1T
1u), and the band due to the transition
1∑
g+(
1A
1g)→
1Π
u(
1T
1u) under- lies the C band. As for the paired-ion-center absorption bands related to the A band, two possible assignments are suggested.
抄録全体を表示
-
Makoto Watanabe, Yoshimitsu Nakamura, Yoshio Nakai, Takatoshi Murata
1969 年 26 巻 4 号 p.
1014-1018
発行日: 1969/04/05
公開日: 2007/05/29
ジャーナル
認証あり
The absorption measurements were made on thin films of solid solutions of alkali chlorides at room temperature. The differences in the spectra of NaCl, KCl, and RbCl are discussed in connection with the nature of the alkali metals. From the measurements in KCl–NaCl and KCl–RbCl, additional evidences were obtained for the assignment of the peaks at 20.3 eV and 21.5 eV in KCl being due to the transitions from K
+ 3
p level. The peaks at 11.4 eV and at 12.3 eV in NaCl are proposed to be attributed to Na
+ ion through the results obtained in KCl–NaCl system. These peaks in NaCl were found to behave consistently also in the system NaCl–NaBr.
抄録全体を表示
-
Kiyoji Uehara, Katsumi Sakurai, Koichi Shimoda
1969 年 26 巻 4 号 p.
1018-1022
発行日: 1969/04/05
公開日: 2007/06/01
ジャーナル
認証あり
The Stark effect in CH
4 which has no permanent dipole moment in the ground vibrational state is observed on one component line at 2947.802 cm
−1 of the
P(7) line in the ν
3 band by a magnetically tuned infrared maser. The effect is interpreted on the basis of the second-order induced dipole moment in the degenerate vibrational state which has the
F2 symmetry. The magnitude of the induced dipole moment of CH
4 in the ν
3 vibrational mode is evaluated from the observed Stark effect.
抄録全体を表示
-
Tadatsugu Hatori
1969 年 26 巻 4 号 p.
1023-1035
発行日: 1969/04/05
公開日: 2007/06/01
ジャーナル
認証あり
On the basis of the Klimontovich equation, the longitudinal dielectric permeability \ ildeε is obtained in the form
(
Remark: Graphics omitted.)
in which, for instances, 〈\hat
a〉=〈\hat
a(
k,ω;
k,ω)〉, (
Remark: Graphics omitted.). Here the quantity \hat
a(
kω;
k′ω′) is represented in terms of the microscopic electric field and the microscopic distribution function; the symbol 〈 〉 denotes the ensemble average with respect to initial conditions; (
Remark: Graphics omitted.) or (
Remark: Graphics omitted.) means the third or fourth-order correlation part in the average of the product of appointed \hat
a’s, respectively. Some reduction to approximate results are given.
抄録全体を表示
-
Shigeo Hamada, Masatomo Sato
1969 年 26 巻 4 号 p.
1036-1048
発行日: 1969/04/05
公開日: 2007/06/01
ジャーナル
認証あり
Interchange stability and drift motion of a plasma losing unsteadily are analysed in a low β limiting case with the use of ideal hydromagnetic equations. The
m-th mode of radial displacement δ
rm of the plasma boundary is subject to the equation δ
\ddotrm−(
S⁄
V)δ
\dotrm+
m(
P⁄
V)δ
rm=0, where the dots indicate the time derivatives and the coefficients are some averages of the state of the flow along the entire line of force. The reactive force is due to the Corioli’s force on the flowing plasma within a moving flux tube, and the potential force is due to the plasma pressure and the centrifugal force of the flow. Solutions of the equation show that the system is stabilized by the plasma outside the ends, in good agreement with experiments.
抄録全体を表示
-
Kripa Sindhu Chaudhuri
1969 年 26 巻 4 号 p.
1048-1055
発行日: 1969/04/05
公開日: 2007/06/01
ジャーナル
認証あり
Asymptotic analysis of the surface displacement integrals obtained in the solution of the three-dimensional problem of waves due to a surface pressure
F(
x,
y)
eiwtH(
t) [where
H(
t)=0 for
t≤0 and
H(
t)=1 for
t>0] in water of finite depth is carried out for large distances and times by the method of stationary phase. The steady state solution found here for a large class of functions
F(
x,
y) by a direct passage to the limit
t→∞, is evaluated in exact terms. Some particular spatial pressure distributions over elliptic regions together with some characteristic features of the wave motion are discussed. An illustration of the directional variation of the waves is added.
抄録全体を表示
-
R. C. Tripathi, G. S. Verma
1969 年 26 巻 4 号 p.
1055-1057
発行日: 1969/04/05
公開日: 2007/05/29
ジャーナル
認証あり
Ultrasonic velocity has been measured in three different carbon steels in their commercially received and annealed conditions and in two of them in quenched condition by total reflection technique at room temperature and at 5 Mc. The elastic constants of these samples have been calculated by known relations in velocities and elastic constants, and their magnitude variation has been discussed.
抄録全体を表示
-
Yoshika Masuda, Masahiro Hashimoto
1969 年 26 巻 4 号 p.
1058
発行日: 1969/04/05
公開日: 2007/06/01
ジャーナル
認証あり
-
P. C. Sood
1969 年 26 巻 4 号 p.
1059
発行日: 1969/04/05
公開日: 2007/06/01
ジャーナル
認証あり
-
H. Umebayashi, K. Ono
1969 年 26 巻 4 号 p.
1060
発行日: 1969/04/05
公開日: 2007/05/29
ジャーナル
認証あり
-
Tadamiki Hihara, Masayuki Kawakami, Mitsuo Kasaya, Hirochika Enokiya
1969 年 26 巻 4 号 p.
1061
発行日: 1969/04/05
公開日: 2007/05/29
ジャーナル
認証あり
-
Hitoshi Yasunaga, Naoki Okuyama, Kenichi Takeya
1969 年 26 巻 4 号 p.
1062
発行日: 1969/04/05
公開日: 2007/05/29
ジャーナル
認証あり
-
Kozo Osamura, Yotaro Murakami
1969 年 26 巻 4 号 p.
1063
発行日: 1969/04/05
公開日: 2007/05/29
ジャーナル
認証あり
-
Kunio Aiki, Kenzi Hukuda, On Matumura
1969 年 26 巻 4 号 p.
1064
発行日: 1969/04/05
公開日: 2007/05/29
ジャーナル
認証あり
-
L. C. Gupta, D. L. Radhakrishna Setty
1969 年 26 巻 4 号 p.
1065
発行日: 1969/04/05
公開日: 2007/06/01
ジャーナル
認証あり
-
Kunio Aiki, Kenzi Hukuda
1969 年 26 巻 4 号 p.
1066
発行日: 1969/04/05
公開日: 2007/05/29
ジャーナル
認証あり
-
Kimiko Sakata
1969 年 26 巻 4 号 p.
1067
発行日: 1969/04/05
公開日: 2007/05/29
ジャーナル
認証あり
-
Ryozo Oyamada
1969 年 26 巻 4 号 p.
1068
発行日: 1969/04/05
公開日: 2007/05/29
ジャーナル
認証あり
-
Sadao Nakamura, Hiroshi Kubo, Noboru Shimomura, Kenji Mitani
1969 年 26 巻 4 号 p.
1069-1070
発行日: 1969/04/05
公開日: 2007/06/01
ジャーナル
認証あり
-
Fuminori Fujimoto, Kohtaro Ishida, Ken-ichiro Komaki
1969 年 26 巻 4 号 p.
1070
発行日: 1969/04/05
公開日: 2007/05/29
ジャーナル
認証あり