Journal of the Physical Society of Japan
Online ISSN : 1347-4073
Print ISSN : 0031-9015
ISSN-L : 0031-9015
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Volume 30, Issue 5
Displaying 1-50 of 53 articles from this issue
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  • Elastic and Inelastic Scattering of Protons on 14N in the Energy Region of 10 to 15 MeV. I. Experimental
    Yukiyasu Oda, Hitoshi Nakamura, Akira Yoshida, Masako Kusuhara, Mariko ...
    1971 Volume 30 Issue 5 Pages 1217-1230
    Published: May 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1217
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    The elastic and inelastic scattering of protons by 14N were studied at Ep=11.90, 12.50, 13.29, 13.56, 13.93, 14.33 and 14.62 MeV. About twenty proton groups, for the excited states of 14N up to 9.51 MeV were observed. The angular distributions of the twelve groups were measured with angle steps of 5° at 14.33 MeV and with that of 15° at other energies. The results including those at 10.2 and 10.5 MeV studied by Warburton et al. and by the University of Washington group respectively show that the distribution shapes vary in general remarkably with the proton energies. Resonance features were evidently recognized at Ep\simeq10.2 MeV and also at 12 and 14 MeV. Systematics were found in the proton yields for the states with odd parity and T=1.
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  • The Decay of 44mSc and 52V
    Kotoyuki Okano, Yoichi Kawase, Shinichi Uehara
    1971 Volume 30 Issue 5 Pages 1231-1235
    Published: May 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1231
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    Gamma rays emitted in the decay of 44mSc and 52V have been investigated. From the decay of 44mSc, five gamma transitions in 44Ca have been observed. Angular correlations of these gamma rays were consistent with the spin assignments of 2, 4 and 2 to levels in 44Ca at 1156.9±0.5, 2282.5±0.8 and 2656.4±0.5 keV, respectively. In the decay of 52V, four gamma rays of 935.6±1.2, 1333.4±0.4, 1433.9±0.6 and 1530.8±0.8 keV have been definitely identified. This fact supports the Jπ=3+assignment to the ground state of 52V. The correspondence between levels in 42Ca, 44Ca and 52Cr is discussed.
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  • The 27Al(d, α)25Mg Reaction at Low Energies
    Yuen-Chung Liu, Chuen Chang
    1971 Volume 30 Issue 5 Pages 1236-1240
    Published: May 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1236
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    The 27Al(d, α)25Mg reaction has been studied over the energy range Ed=2.40–2.90 MeV. The relative integrated cross sections agree well with those predicted by the Hauser-Feshbach theory for the states of known spin. Probable spins have been deduced for the 10th, 12th and 13th excited states of the 25Mg nucleus. The spin cut-off parameter value in this reaction has been obtained to be σ2≈9.
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  • Non-Existence of Isomeric α-Decay in Dy154
    Yasuyuki G\={o}n\={o}, K\={o}tar\={o} Hiruta
    1971 Volume 30 Issue 5 Pages 1241-1242
    Published: May 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1241
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    The enhanced alpha decay of Dy154m was reinvestigated. The alpha particles emitted from the ground states of Dy154 (106 y) and Dy153 (6.8 h) were detected from the same source. However, the alpha particles of 3.37 MeV which had been reported to be an isomeric alpha decay in Dy154 (13 h) have not been observed.
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  • The Interaction Mean Free Paths and the Fragmentation Probabilities of Cosmic Heavy Nuclei at Energies Above 10 GeV/Nucleon
    Takeshi Saito
    1971 Volume 30 Issue 5 Pages 1243-1251
    Published: May 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1243
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    A total of 7695 tracks of heavy nuclei were located in a systematic scanning of a stack of Brawley nuclear emulsion and the heavy nuclei with energies greater than 10 GeV/nucleon, 497 events, were accepted for the present investigation. The error in energy estimation was 30% and that in charge estimation by δ-ray counting was 0.25 units of charge for M-nuclei and about 0.5 units of charge for iron-groups.
    The interaction mean free paths and the fragmentation probabilities of heavy nuclei at energies above 10 GeV/nucleon in nuclear emulsion were obtained and those in air and in hydrogen were deduced with reasonable accuracy. The interaction mean free paths and the fragmentation probabilities do not indicate any noticeable energy dependence over the wide energy range of a few GeV/nucleon to several hundred GeV/nucleon for heavy nuclei and of about 0.1 GeV/nucleon to several hundred GeV/nucleon for α-particles.
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  • The Lifetime of the Lowest 6+ State in 54Fe and E2 Effective Charge
    Hiroyuki Saito, Toru Nomura, Toshimitsu Yamazaki
    1971 Volume 30 Issue 5 Pages 1252-1260
    Published: May 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1252
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    The lifetime of the lowest 6+ state in 54Fe was measured by the β+-γ delayed coincidence method in the decay of the 1.43 min 54Co isomer. The half life was determined to be 1.24±0.04 nsec and B(E2: 6+→4+)=38.9±1.3 e2fm4. Assuming pure πf7⁄2−2 configuration both for the 6+ and 4+ states in 54Fe, the polarization charge of the 0f7⁄2 proton (δeeff) with 56Ni as a core is deduced to be 0.9 e. From comparison with theoretical calculations a contribution to δeeff due to the 2hω excitation of an inert core is found to be nearly the same in 48Ca and 56Ni.
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  • Lattice Green’s Function for the Simple Cubic Lattice
    Tsuyoshi Horiguchi
    1971 Volume 30 Issue 5 Pages 1261-1272
    Published: May 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1261
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    The lattice Green’s function of the simple cubic lattice
    (Remark: Graphics omitted.)
    is considered for the following ranges of the parameters;
    t=s−iε, −∞<s<∞, 0≤l+m+n≤5.
    The function Gsc(t;l, 0, 0) along an axis is expressed as a sum of simple integrals of the complete elliptic integral of the first kind and the integrals are evaluated numerically. The function Gsc(t;l, m, n) at a general position (l, m, n) is calculated with the aid of the recurrence formula which is satisfied by the Green’s function. The behaviors of the function Gsc(t;l, m, n) are shown by figures. Discussions of the divergent behavior of the derivative of Gsc(t;l, 0, 0) with respect to s, are given at the singular points, s=0, 1 and 3.
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  • Theory of Optical Activity in Nematic Liquid Crystals
    Hatsuo Kimura
    1971 Volume 30 Issue 5 Pages 1273-1279
    Published: May 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1273
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    Quantum statistical expressions for the optical activity in nematic liquid crystals are obtained on the assumption that the systems are composed of molecules with Cs or C2v symmetry. Using these expressions experimental results which have been recently obtained by Williams in nematic paraazoxyanisole (pAA) are well explained. It is shown that in C2v molecules the optical rotation can occur as in Cs, while a linear electro-optic effect such as observed in pAA (Cs) cannot occur.
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  • Intensity of Magnon Sidebands
    Kohsei Shinagawa, Yukito Tanabe
    1971 Volume 30 Issue 5 Pages 1280-1291
    Published: May 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1280
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    A general formula is derived for the integrated intensity of magnon sidebands in a two-sublattice antiferromagnet. The integrated intensity variation with temperature is calculated under the (random phase) decoupling approximation. Predicted values of the integrated intensity coincide with that obtained in the spin wave theory at low temperatures and that in the pair spectra theory at high temperature limit. The theory is applied to the rutile type antiferromagnets and numerical calculations are presented for magnon sidebands in MnF2.
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  • On a New Decoupling Scheme for the Retarded Green Function and Its Application to the Heisenberg Ferromagnet. II
    Toshihiro Shimizu
    1971 Volume 30 Issue 5 Pages 1292-1299
    Published: May 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1292
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    The decoupling problem of the Green function is investigated in a vector space. In the decoupling scheme characteristics of two kinds of Green functions defined using commutator and anticommutator are taken into account. Its lowest approximation is applied to the Heisenberg ferromagnet. If the obtained spectrum is calculated by using the symmetric decoupling, the resulting set of equations is equivalent to the one derived by Katsura and Horiguchi. If the spectrum is calculated by introducing a decoupling parameter which is determined by a condition derived from the spectral theorem, the result agrees with the one obtained by Mubayi and Lange (and by A. Oguchi), who show that the spontaneous magnetization at one and two dimensions does not exist, and that the Curie temperature at three dimensions agrees with that of the molecular field theory and the temperature dependence of spin wave energy agrees with that of Bloch’s calculations in the low temperature regions.
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  • Contribution to the Plasmon Satellite in Soft X-Ray Emission Spectra of Light Metals
    Yoshihiro Ohmura
    1971 Volume 30 Issue 5 Pages 1300-1310
    Published: May 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1300
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    The plasmon satellite in the soft X-ray emission spectra of light metals is discussed using the method of Bohm and Pines. The transition probabilities for both K- and L-emission cases are obtained generally as the functions of plasma frequency, cut off wave number, Fermi energy and gap energy between the bottom of valence band and bound level. The numerical calculation is given for the case of Na L-emission. The results are compared with that given by Brouers; in the case of Na L-emission, it is shown that the spectrum rises more rapidly from the higher energy edge to the peak which is pointed.
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  • Determination of the Exchange Integrals in β-MnO2
    Nobuhiko Ohama, Yoshikazu Hamaguchi
    1971 Volume 30 Issue 5 Pages 1311-1318
    Published: May 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1311
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    Magnetic susceptibility and specific heat of the β-MnO2 powder specimen have been measured in the range 20 to 300°K and 77 to 100°K respectively. The measurements have also been made for the paramagnetic inelastic neutron scattering at room temperature by using time-of-flight method. The values of the Weiss temperature, of the Néel temperature and of the average full width at half maximum of the neutron energy distribution (Gaussian) have been determined as 1050°K, 92°K and 13 meV respectively. The exchange integrals (Jn) are determined by combining these experimental data with the theoretical relations between exchange interactions and physical properties and by assuming J1⁄J2=1.60: J1=8.9 (antiferromagnetic), J2=5.5 and J3=−1.3°K, where J1 is the exchange integral between nearest neighbours (in the ⟨001⟩ direction), J2 acts between next nearest neighbours (⟨111⟩ direction) and J3 refers to third-neighbour coupling.
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  • Magnetic Properties of Cr1−xMnx As System
    Noriaki Kazama, Hiroshi Watanabe
    1971 Volume 30 Issue 5 Pages 1319-1329
    Published: May 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1319
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    Studies on X-ray crystallographic, magnetic, neutron diffraction and transport properties have been made of the system Cr1−xMnxAs (0≤x≤0.9). All the members of the system undergo a transition from MnP structure to NiAs structure. Magnetic measurements have revealed the existence of three distinct magnetic regions and the magnetic structures of these regions have been found from neutron diffraction measurements. On the basis of these experimental data, magnetic and crystallographic phase diagrams have been constructed. In particular, CrAs exhibits a discontinuous change in the lattice constants at the Néel temperature which was obtained to be 265°K. The electrical resistivity and thermoelectric power show a strong anomaly at the temperature where the magnetic order disappears. The observed helical spin arrangement may be stabilized by the distorion of the Fermi surface which is caused by the formation of a new zone boundary.
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  • Thermal and Magnetic Properties of Linear Ferro- and Autiferro-Magnetic Substances, MCl2·2NC5H5(M; Co, Cu)
    Kazuyoshi Takeda, Shun-ichi Matsukawa, Taiichiro Haseda
    1971 Volume 30 Issue 5 Pages 1330-1336
    Published: May 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1330
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    The magnetic specific heat of CoCl2·2NC5H5 agreed with the exact solution of the ferromagnetic Ising linear chain with J⁄k=9.5±0.2 K above 6 K. The broad maximum expected theoretically to appear at 3.9±0.15 K was observed at 4.3±0.2 K. The magnetic susceptibility of this salt showed the rapid increase which is also the characteristic of the ferromagnetic Ising linear chain. About 85% of the total magnetic entropy Rln2 was left above the Néel point 3.17±0.02 K.
    The characteristic features of the antiferromagnetic linear chain of the isotropic Heisenberg spins were obtained in the case of CuCl2·2NC5H5: The magnetic susceptibility quite agreed with the one calculated theoretically for |J|⁄k=13.6±0.8 K and g=2.06±0.06. The linear dependence of the specific heat on temperature in the lowest temperature region, which is expected theoretically, was ascertained experimentally for the first time. The absolute experimental values of the magnetic specific heat agreed with the theoretical ones for |J|⁄k=11.5±0.4 K.
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  • Nuclear Magnetic Resonance Study in Dilute Copper- Cobalt Alloy
    Shinji Wada, Kunisuke Asayama
    1971 Volume 30 Issue 5 Pages 1337-1342
    Published: May 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1337
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    NMR of Co59 diluted in Cu metal has been studied in the temperature range from 1.1 to 4.2°K. The Knight shift of Co59 is large and positive (5.2±0.2%). It is independent of the concentration of Co and the temperature. The observed Knight shift is separated into d-orbital part and d-spin part using the susceptibility data. The value of T1T is 20±5 msec °K in our experimental region. By using the Korringa type relation between the Knight shift and T1T, the main part of the Knight shift and the relaxation is shown to be attributed to the orbital interaction. The dominant part of the line width of Co59 which is proportional both to the external magnetic field and the concentration of Co arsies from the inhomogeneous polarization of the impurity spins.
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  • Effect of Internal Magnetic Field on the Optical Spectra of Sm3+ Ion in TbPO4, YPO4 and Their Mixed Crystals
    Masahiro Hirano, Shigeo Shionoya
    1971 Volume 30 Issue 5 Pages 1343-1351
    Published: May 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1343
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    The emission and excitation spectra and their polarization properties of Sm3+ ion doped as a probe ion in Tb1−xYxPO4 (x=0−1) crystals were investigated. Some of Kramers’ doublet states of Sm3+ ion which is degenerate in YPO4 is split in TbPO4. The 4G5⁄2↔6H5⁄2 transition was investigated in detail as a typical case. The separation between split states becomes gradually smaller with raising temperature, but the splitting remains even up to 200°K. It is concluded that this splitting is caused by the magnetic interaction between an Sm3+ ion and Tb3+ ions, and that it is due to the short range ordering and probably of the exchange type. The manners of the change of the polarization properties as well as of the separation width with Tb3+ concentration can be explained well with the assumption that the internal magnetic field has the parallel and perpendicular components both increasing in proportion to Tb3+ concentration.
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  • The Hall Coefficients of Li–Mg Alloys
    Masahiko Ide
    1971 Volume 30 Issue 5 Pages 1352-1359
    Published: May 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1352
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    The temperature and concentration dependences of the Hall coefficients in β-phase of lithium-magnesium alloys (0∼70 at.%Mg) have been measured from 77°K to the room temperature. In the temperature range investigated, Hall coefficient is almost independent of the temperature except pure lithium. The dependence of Hall coefficient (RH) on electron-atom ratio (e/a) is approximately represented by a third-degree polynomial; RH×1011(m3⁄A.s)=85.58(e/a)3−333.31(e/a)2+443.00(e/a)−210.80. Although there is fluctuation to some extent in the experimental data, a distinct agreement is found between the experimental results and the prediction by four-OPW calculation. For this reason, the four-OPW model is thought to be a good approximation for this alloy phase. The experimental result suggests the contact of the Fermi surface to the {110} zone boundary at e/a=1.3. The result also suggests that overlap through {110} zone face does not occur in the measured range.
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  • Electrical Resistivity Measurements of Deformed Metals after Low Temperature Neutron Irradiation
    Saburo Takamura, Reimon Hanada, Shigeo Okuda
    1971 Volume 30 Issue 5 Pages 1360-1366
    Published: May 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1360
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    The effect of deformation before and after fast neutron irradiation at about 10°K on the recovery spectra of Cu, Al and Au is studied by measurements of residual resistivity. In Cu specimen deformed at 4.2°K after irradiation, the recovery below 43°K is retarded. But this retardation cannot be observed in Al and a small reduction is observed in Au. On the other hand, the stages II and III are enhanced by deformation in all three metals. Two mechanisms are discussed in relation with these observations, namely, the recovery of stage I defects and the transformation of stage I defects though interactions with moving dislocations.
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  • Electrical Resistivity Measurements of Vanadium and Iron Deformed at 4.2°K
    Saburo Takamura
    1971 Volume 30 Issue 5 Pages 1367-1373
    Published: May 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1367
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    The recovery of electrical resistivity in polycrystalline vanadium and iron, deformed at 4.2°K, has been studied in the temperature range of 4.2° to 440°K. The initial recovery stage (Stage I) is attributed to the dislocation rearrangement and the stage II recovery is also considered to be due to the migration or dissociation of interstitial clusters in f.c.c metals (Cu, Au and Al).
    The effect of a deformation on the flux line in the mixed state of type-II superconductor, is also studied. The movement of flux lines in the medium containing defects is discussed on the analogy of movement of dislocations.
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  • Photogeneration of Charge Carriers in α-Sulfur below 3.6 eV
    Yuzo Mizobuchi, Hiromu Kato, Ryuichi Shintani, Yuzuru Ooshika
    1971 Volume 30 Issue 5 Pages 1374-1379
    Published: May 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1374
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    The light intensity and temperature dependence of photogeneration of charge carriers in α-sulfur was investigated in the energy range from 2.2 to 3.6 eV. It was confirmed that, in this energy range, free carriers are generated through two processes, that is, (1) an extrinsic single quantum process which depends strongly on surface conditions and (2) an intrinsic double quantum process which is independent of the surface states. In the extrinsic single quantum process, the thermal activation energies both for electrons and holes are 0.03 eV and its value is almost the same as that of the generation above 4 eV.
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  • Studies on Ag− Centers in Alkali Halides. II. Ag−(Na) Centers in KCl
    Kazuko Kojima, Shigetaka Shimanuki, Tadanobu Kojima
    1971 Volume 30 Issue 5 Pages 1380-1388
    Published: May 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1380
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    Optical properties of Ag−(Na) centers in KCl crystals were investigated. Dichroic excitation spectra for the 2.79 eV emission were observed under stimulation with polarized light at liquid nitrogen temperature. An analysis of the dichroic excitation spectra reveals that the absorption bands A1, A2, C1 and C2 arise from the transitions 1S0→3P1(M=±1), 3P1(M=0), 1P1(M=0) and 1P1(M=±1) respectively. It was also established that the upper state responsible for the 2.79 eV emission is the relaxed A1 state. Calculations of energy levels and relative dipole strengths are given, which explain the experimental data satisfactorily. Merits and demerits of the method of excitation spectra to detect absorption bands are finally discussed.
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  • Far-Infrared Cyclotron Resonance in p-Type Tellurium
    Ryozo Yoshizaki, Shoji Tanaka
    1971 Volume 30 Issue 5 Pages 1389-1399
    Published: May 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1389
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    Cyclotron resonance absorptions of p-type tellurium were investigated at liquid helium temperatures in the far-infrared region from 120μm to 400 μm under the magnetic field up to 92 kOe. The CR transition energies were measured as a function of the magnetic field which was applied parallel to the three main crystal axes of tellurium, c-axis, binary and bisectrix. Fairly good agreements were obtained between the present experiments and the theoretical calculations made by Nakao, Doi and Kamimura (J. Phys. Soc. Japan 30 (1971) 1400. A fine structure was observed in the CR transition peak for H⁄⁄c-axis, and the relative intensities of the fine structure changed with lowering the temperatures. This fact is possibly due to the unequal spacing of the transition energies along kz-axis between the Landau levels n=0 and 1. The impurity effects in the CR transitions were also measured for the antimony doped specimens with various carrier concentrations. It was found that the binding energy of the impurity state was 1.4 meV in the range of the magnetic field up to 90 kOe.
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  • The Valence Band Structure of Tellurium. III. The Landau Levels
    Kenji Nakao, Takao Doi, Hiroshi Kamimura
    1971 Volume 30 Issue 5 Pages 1400-1413
    Published: May 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1400
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    The Landau levels are calculated for two upper valence bands of tellurium. The peak positions and intensities of the cyclotron resonance and of the inter-valence band magneto-absorption are calculated. Effects of the k-linear terms on them are elucidated. For the magnetic field perpendicular to the c-axis, the Landau levels of the uppermost valence band are doubly degenerate at low magnetic fields and split as the field increases, while those of the lower band are equally spaced but bend downwards at high fields. The peaks in the magneto-absorption are all identified as the harmonic transitions. The agreement with the experiments is satisfactory, and all the band parameters are determined. It is shown that the k-linear terms make the anisotropy of the effective masses opposite for the two bands.
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  • Cl−L2,3 Absorption Spectra of Alkali Chlorides, Silver Chloride and Thallous Chloride
    Osamu Aita, Ichiro Nagakura, Takasi Sagawa
    1971 Volume 30 Issue 5 Pages 1414-1422
    Published: May 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1414
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    The Cl−L2,3 absorption spectra of alkali chlorides, AgCl and TlCl have been measured using an ordinary X-ray tube with tungsten target as a radiation source. Measurements were performed carefully at 300°K, 90°K and 25°K over the photon energy range from 198 to 220 eV. The counting method for detection was more improved than in the previous report and a toroidal pre-reflector was used. Results are compared with the existing results of energy band calculation. It is concluded that sharp absorption bands near the threshold are caused by core-excitons with holes in the 2p level of chlorine.
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  • Radiative Decay-Time of Bound Excitons in Silver Bromide
    Motowo Tsukakoshi, Hiroshi Kanzaki
    1971 Volume 30 Issue 5 Pages 1423-1429
    Published: May 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1423
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    Luminescence due to decay of iodine-bound exciton in AgBr:I− is observed under irradiation of a Q-switched ruby laser and can be concluded as originated from interband two-photon transition process. Radiative decay-tome of the luminescence is studied as a function of temperature (2∼120°K), emission wavelength (460∼550 nm) and iodine concentration (2.1×1018∼5.3×1019 cm−3). The decay kinetics and its temperature dependence are found to be different between the two emission components in the emission spectrum; high energy component (∼495 nm) and low energy one (∼520 nm). The decay time at 2°K are (25±4)×10−6 and (16±3)×10−6s for high and low energy components, respectively, at iodine concentration of 2.1×1018 cm−3. The concentration dependence of relative intensity of the two components can be understood by assuming that the high energy component corresponds to exciton bound to isolated iodide ion and the low energy component to that bound to iodine pair.
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  • Dechanneling of MeV Protons from Axial and Planar Channels of Germanium Crystal
    Kenji Morita, Noriaki Itoh
    1971 Volume 30 Issue 5 Pages 1430-1438
    Published: May 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1430
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    Energy spectra of protons backscattered from the surface of germanium single crystals are measured. The dechanneling rate of channeled protons into random direction and the stopping power ratio of the aligned to the random beam are obtained. The stopping power ratios for 1.5 MeV protons in the ⟨112⟩, ⟨111⟩, and ⟨100⟩ directions are 0.31±0.04, 0.40±0.06, and 0.43±0.06 respectively. The dechanneling rate of 1.5 MeV protons at the axial channel in which atoms in the row are uniformly spaced is proportional to the reverse of the square of the critical angle. The theoretical values of the dechanneling rate are calculated using the diffusion model and compared with the experimental valules. The experimental dechanneling rate in the ⟨111⟩ direction is considerably lower than the theoretical value.
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  • Inelastic Scattering of Fast Electrons by Crystals. II. The Excess and Defect Kikuchi Bands
    Kohtaro Ishida
    1971 Volume 30 Issue 5 Pages 1439-1448
    Published: May 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1439
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    The intensity of the Kikuchi band is calculated as a function of crystal thickness, using the author’s theory (K. Ishida: J. Phys. Soc. Japan 28 (1970) 450.). In a thin crystal, the Kikuchi band appears as the excess (black) band and it changes to the defect (white) band as the thickness increases, in agreement with the experiments.
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  • A Molecular Theory of Viscosity of Dilute Polymer Solutions
    Shizuo Hayashi
    1971 Volume 30 Issue 5 Pages 1449-1460
    Published: May 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1449
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    A theory of viscosity is developed on the basis of Born-Green’s distribution-function method. The solutions are considered to be composed of solvent molecules and segments of polymer molecules in contrast with conventional models in which solvents are regarded as continuous structureless media. The stress is obtained in terms of two-body distribution functions naa, nab and nbb and potential energy functions φa, φb and \varphi, where the subscripts a and b refers to solvent molecules and segments, respectively, provided that \varphi refers to interaction between a solvent molecule and a polymer segment.
    The viscosity and the intrinsic viscosity are obtained from the stress versus strain rate relation. When the solvent is good Staudinger’s equation is got. The equation of viscosity [η]=KMα and [η]=AM1⁄2+BM are derived from two simple assumptions for poor solvents. It is, however, impossible to judge which equation for viscosity is more reasonable since the reasoning for any of assumptions is not clear only from the theoretical standpoint.
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  • Exchange Effects on the Rotational Excitation of HCl by Electron Collisions
    Yukikazu Itikawa, Osamu Ashihara
    1971 Volume 30 Issue 5 Pages 1461-1466
    Published: May 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1461
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    An effect of electron exchange is explicitly included in the calculation of the rotational (0→1) and elastic cross sections of HCl. For a rotational excitation, a considerable effect appears only in the s- and p-wave partial cross sections in a somewhat higher energy region (E\gtrsim1 eV). Because of the dominance of the higher-partial wave contribution in the electron-polar molecule collision, the total excitation cross section is little affected (only a few per cent) by the electron exchange, even in this higher-energy range. The differential cross section at large angles, however, changes with inclusion of the exchange effect. For an elastic scattering, the electron exchange strongly influences the cross section. Especially, in the energy region where a potential resonance occurs, the value of the elastic cross section is increased by a factor of 10.
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  • Vibrational Relaxation Equation for Polyatomic Gases and Its Application to CO2
    Yukinori Sato, Soji Tsuchiya
    1971 Volume 30 Issue 5 Pages 1467-1476
    Published: May 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1467
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    The vibrational relaxation equation for polyatomic gases is formulated in consideration of the translation-vibration and the vibration-vibration energy transfers. The multi-quanta transitions of vibrational states and the simultaneous couplings among any numbers of vibrational modes are allowed in the vibrational energy transfers. On the basis of this relaxation equation, the energy relaxation of each vibrational mode in CO2 is analyzed. The effect of the V−V couplings between mode ν3 and modes ν1+ν2 on the relaxation of mode ν1(ν2) is not appreciable due to the small vibrational heat capacity of mode ν3, and the apparent relaxation rate for mode ν1(ν2) is nearly equal to a mean rate constant K∞ of the T−V processes of modes ν1 and ν2. If the rate of the intramolecular V−V couplings of mode ν3 with modes ν1+ν2 is comparable to or larger than K∞, the apparent relaxation rate of mode ν3 is also very close to K∞. This is the reason why a multiple relaxation has not been found experimentally in CO2.
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  • Motion and Collision of Plasma Blobs Produced by Giant Pulse Laser in a Transverse Magnetic Field
    Tohru Matoba, Seiichi Ariga
    1971 Volume 30 Issue 5 Pages 1477-1487
    Published: May 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1477
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    The properties of plasma created by the 200 MW giant pulse ruby laser irradiation on the lithium plate were investigated. Measurements of the variation of the shape and size of the plasma blob with and without the existence of the uniform magnetic field, its density, temperature, pressure, velocity of the motion and the electric field due to the charge separation were made. The phenomena occurring at the head-on collision of two blobs across the uniform magnetic field were also investigated and confirmed that the electric field could be canceled out at the colliding region.
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  • Perturbation Approach to Nonlinear Vlasov Equation. III. Stationary Nonlinear Oscillation
    Ichiro Kawakami, Heiji Sanuki
    1971 Volume 30 Issue 5 Pages 1488-1493
    Published: May 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1488
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    One-dimensional stationary nonlinear electrostatic waves which are periodic in space are investigated by use of the perturbation method.
    The distribution functions are derived. For these functions, some conditions under which there exists periodic waves are derived.
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  • On the Rate of Growth of Disturbances in Rayleigh-Taylor Model
    Mihir B. Banerjee, N. L. Kalthia
    1971 Volume 30 Issue 5 Pages 1494-1497
    Published: May 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1494
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    On the basis of the linear theory of stability, the present paper makes an attempt to investigate theoretically the bounds for the rate of growth of an arbitrary disturbance in the Rayleigh-Taylor configuration. A circle theorem is established in this direction which arrests the complex amplification rate of an arbitrary oscillatory perturbation inside a circle. Certain other results concerning the above bounds and the stability of the model are also given.
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  • Electron Spin Resonance in NiBr2 Near the Critical Point
    Koichi Katsumata
    1971 Volume 30 Issue 5 Pages 1498
    Published: May 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1498
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  • Spins and Parities of 47K Levels Observed in the 48Ca(p, d) 47Ca (IAS) Reaction
    Hiroshi Taketani, Minoru Adachi, Masao Ogawa, Kusuo Ashibe, Toshiyuki ...
    1971 Volume 30 Issue 5 Pages 1499
    Published: May 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1499
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  • The Energy Gap between Two Major Proton Shells in the Z=82 Region
    Kohsuke Yagi, Katsumichi Suzuki, Kenji Sato
    1971 Volume 30 Issue 5 Pages 1500
    Published: May 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1500
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  • Mössbaur Effect and Magnetic Susceptibility in Ordered Perovskite (SrLa)(FeTa)O6
    Tetsurô Nakamura, Toshiyuki Sata
    1971 Volume 30 Issue 5 Pages 1501
    Published: May 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1501
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  • Amplification of Sound for qR>1 by Degenerate Conduction Electrons
    Tadao Ishii
    1971 Volume 30 Issue 5 Pages 1502
    Published: May 15, 1971
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1502
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  • Direct Observation of Lüders Band Propagation in Silicon Iron Single Crystal by HVEM
    Hiroyasu Saka, Minoru Doi, Toru Imura
    1971 Volume 30 Issue 5 Pages 1503
    Published: May 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1503
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  • Thermohysteresis Phenomena of the Electrical Resistivity in the Laves Phase Compounds in Fe–Ti System
    Kôki Ikeda, Takurô Nakamichi, Mikio Yamamoto
    1971 Volume 30 Issue 5 Pages 1504-1505
    Published: May 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1504
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  • Memory Effect in Fe–Ni Alloy
    Akira Nagasawa
    1971 Volume 30 Issue 5 Pages 1505
    Published: May 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1505
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  • Photovoltaic Effect in Ferroelectric and Photoconductive SbSI
    Katsuhiro Irie
    1971 Volume 30 Issue 5 Pages 1506
    Published: May 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1506
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  • Phonon-Assisted Energy Transfer—Comparison between Theory and Experiment
    Naoto Yamada, Shigeo Shionoya, Takashi Kushida
    1971 Volume 30 Issue 5 Pages 1507
    Published: May 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1507
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  • Raman Spectra of ZnSe-ZnTe Mixed Crystals
    Shin-ichi Nakashima, Takaaki Fukumoto, Akiyoshi Mitsuishi
    1971 Volume 30 Issue 5 Pages 1508
    Published: May 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1508
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  • Conduction-Band Tailing in n-Type InSb
    Hideaki Ikoma
    1971 Volume 30 Issue 5 Pages 1509
    Published: May 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1509
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  • The Electron Spin Resonance of Self-Trapped Holes in Cu Doped AgCl
    Minoru Fukui, Yoshikazu Hayashi, Hide Yoshioka, Hiroshi Kanzaki, Shiro ...
    1971 Volume 30 Issue 5 Pages 1510
    Published: May 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1510
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  • The Spin Dependent Conductivity in P-Doped Si
    Yukio Toyoda, Yoshikazu Hayashi
    1971 Volume 30 Issue 5 Pages 1511-1512
    Published: May 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1511
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  • Thermal Expansion in Ferroelectric AgNa(NO2)2
    Hirohumi Miki, Yasuharu Makita, Kazuo Gesi
    1971 Volume 30 Issue 5 Pages 1512
    Published: May 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1512
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  • Normal Stress Effect in Polydisperse Polymer Solution
    Wataru Segawa, Katsumi Ishida
    1971 Volume 30 Issue 5 Pages 1513
    Published: May 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1513
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  • A Magnetic Cut-Off System for a Plasma Flow
    Yasuo Shimomura, Katsumi Nishimori, Hiroshi Itô
    1971 Volume 30 Issue 5 Pages 1514
    Published: May 15, 1971
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.30.1514
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