Journal of the Physical Society of Japan

On the Neutrons from the N¹⁴(d, n)O¹⁵ Reaction

Itaru Nonaka, Susumu Morita, Nawoyuki Kawai, Toshiyuki Ishimatsu, Shig ...

1956 Volume 11 Issue 1 Pages 1-7
Published: January 05, 1956
Released on J-STAGE: June 01, 2007

DOIhttps://doi.org/10.1143/JPSJ.11.1

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The energy spectrum and the angular distribution of the neutrons from the N¹⁴(d, n)O¹⁵ reaction were investigated by the photographic plate method. The energy of the bombarding deuterons was 1.85 MeV, and the Q-value corresponding to the ground state of O¹⁵ nucleus was obtained to be (5.21±0.07) MeV. The low energy neutron group corresponding to the first excited state of O¹⁵ nucleus was also observed, but it overlapped with the contaminated C¹²(d, n)N¹³ neutrons and the accurate Q-value could not be determined. The estimated rough value was about −0.1 MeV.
The angular distribution of the high energy neutron group has a maximum at about 20 degrees (c.m.s.) and decreases considerably beyond this maximum, indicating the stripping process corresponding to l_p=1.
This reaction may be a good source of neutrons of about 7 MeV at the bombarding energies of deuterons below 2 MeV.

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A Lattice Theory of Quantum Fluids

Shoichiro Koide

1956 Volume 11 Issue 1 Pages 7-14
Published: January 05, 1956
Released on J-STAGE: June 01, 2007

DOIhttps://doi.org/10.1143/JPSJ.11.7

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Using the procedure of ‘lattice space quantization’, the cell method for liquids is developed quantum mechanically so as to include the inter-cellular motion of the molecules. It is shown that the statistics plays its essential roles in this inter-cellular motion just as in the case of ideal gases. The ground state of the Bose liquid and the lambda-transition of liquid helium are discussed on this stand point.

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Quantum Effects in the Theory of Surface Energy

Akira Harasima, Yoshihisa Shimura

1956 Volume 11 Issue 1 Pages 14-21
Published: January 05, 1956
Released on J-STAGE: June 01, 2007

DOIhttps://doi.org/10.1143/JPSJ.11.14

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Applying Prigogine’s method of calculating the cohesive energy and the volume of liquid helium at 0°K and also Prigogine’s method of calculating the surface tension, we have discussed the quantum effects in the theory of surface energies of several substances at 0°K. Assuming that the intermolecular potential is of the form
φ(R)=4ε{(σ⁄R)¹²−(σ⁄R)⁶},
we can express the reduced surface energy at 0°K, U₀^*=U₀σ²⁄ε, as a function of the quantum mechanical parameter
Λ^*=\frachσ\sqrtmε, m: mass of a molecule
It is shown that U₀^* decreases with increasing Λ^* in agreement with observed tendency.

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Magnetic Properties of Nickel Telluride

Enji Uchida, Hisamoto Kondoh

1956 Volume 11 Issue 1 Pages 21-27
Published: January 05, 1956
Released on J-STAGE: June 01, 2007

DOIhttps://doi.org/10.1143/JPSJ.11.21

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Experimental results are reported of the magnetic properties of NiTe_x, where x is the molal content of tellurium. When 0.1≤x≤0.65, this substance is found to be ferromagnetic; the variations with composition of the saturation magnetization and of the Curie temperature show evidences of a transition at x=0.33 (27 atomic percent Te) from a heterogeneous phase beginning at pure metallic nickel to a certain ferromagnetic homogeneous phase. A paramagnetic phase appears above x=0.7 (41 atomic percent Te), although its paramagnetic behaviour is not truely paramagnetic in the Curie-Weiss sense, especially at high temperatures, namely, a considerable temperature dependence of the susceptibility is observed at low temperatures and a temperature-independent susceptibility of a small value less than 0.5 emu/g at high temperatures. These behaviours of the susceptibility are apparently similar to those of Cu-rich Cu-Ni alloys studied by Kaufmann and Starr, though a marked dissimilarity is also found between their characters. Namely, an antiferromagnetic character is present in NiTe_x at the paramagnetic compositions.

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Magnetic and Electrical Properties of Manganese Telluride

Enji Uchida, Hisamoto Kondoh, Nobuo Fukuoka

1956 Volume 11 Issue 1 Pages 27-32
Published: January 05, 1956
Released on J-STAGE: May 29, 2007

DOIhttps://doi.org/10.1143/JPSJ.11.27

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The temperature dependence of the susceptibility of the antiferromagnetic compound MnTe was measured over a range of temperature between liquid nitrogen temperature and 720°C. An abrupt change in slope and a maximum of the susceptibility curve were found at 37°C and at 55°C respectively. These results are compared with the observed Néel temperatures previously reported by Squire and by Serre. A thermal hysteresis was also found above the Néel temperature, relating to the heat history of the specimen. It is shown that the susceptibility of MnTe_1+x (0≤x≤1), where x is the excess content of tellurium, is explicable in terms of two phases, MnTe and MnTe₂ which posses different susceptibilities. The electrical properties, i.e., the resistivity, the thermo-emf and the Hall emf, were measured as functions of temperature. Evidence was found of anomalous behaviours at the Néel temperature for them. A large thermal hysteresis of the resistivity is also found above the Néel temperature, which suggests a change of the crystal structure at about 130°C.

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The Effects of Covalency on the Nuclear Magnetic Resonance in Ionic Crystals

Kei Yosida, Tôru Moriya

1956 Volume 11 Issue 1 Pages 33-49
Published: January 05, 1956
Released on J-STAGE: June 01, 2007

DOIhttps://doi.org/10.1143/JPSJ.11.33

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Effects of covalency on the nuclear magnetic resonance in ionic crystals are discussed on the basis of perturbation calculations. Formulas for the chemical shift, the I–I coupling and the quadrupolar relaxation time are derived. Using the degree of covalency deduced from the experimental values of the chemical shift, the coefficient of the I–I coupling and the quadrupolar relaxation time are estimated for some ionic crystals. It is shown that, when the degree of covalency is several percent, the quadrupolar relaxation time becomes much shorter than in pure ionic case. For instance, the relaxation time of Br in KBr, assuming the degree of covalency of 1 percent, is estimated to be 1 sec, which is only several times larger than the experimental value.

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Dipolar Broadening of the Central Line of a Magnetic Resonance for Half-integral Spin

Kenjiro Kambe, John F. Ollom

1956 Volume 11 Issue 1 Pages 50-52
Published: January 05, 1956
Released on J-STAGE: June 01, 2007

DOIhttps://doi.org/10.1143/JPSJ.11.50

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The second moment of the central line of a magnetic resonance for half-integral spins, for which quadrupole coupling (nuclear spin case) or crystalline field effect (electronic spin case) is present, is calculated by the Van Vleck procedure. The interactions between like spins, unlike spins and semi-like spins are considered separately. The results are compared with the Van Vleck results for which no quadrupole coupling or crystalline effect is assumed.

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On the Plastic Deformation of α-brass Single Crystals by Compression

Hiroshi Kimura

1956 Volume 11 Issue 1 Pages 53-57
Published: January 05, 1956
Released on J-STAGE: May 29, 2007

DOIhttps://doi.org/10.1143/JPSJ.11.53

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The relationship between the crystallographic orientation of specimens and the easy glide was examined with α-brass single crystals deformed by compression. Micrographic observations were performed and discussed together.
Besides these main studies, it was found that the hardening in copper alloys due to low temperature annealing after cold working, which was observed in polycrystalline specimen, was not observed in single crystals.

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On the Floating Probe Method for the Measurement of Ionized Gas

Kenzo Yamamoto, Takayoshi Okuda

1956 Volume 11 Issue 1 Pages 57-68
Published: January 05, 1956
Released on J-STAGE: June 01, 2007

DOIhttps://doi.org/10.1143/JPSJ.11.57

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Several problems connected with the floating probe method are discussed and solved. Analysing the variation of ion current due to sheath expansion, the authors obtain the criterion for applicability of the usual double probe method and also the general expression available for the estimation of electron temperature.
From the relation between probe characteristic and electron energy distribution, a floating triple method is newly proposed. This method is useful for the measuring of energy distribution in electrodeless or h.f. discharges.
By special use of the floating double or triple probe, the measurement of potential distribution in such a quasi-plasma as ion sheath and the transition region between plasma and ion sheath can be attained. As one example, the floating potential becomes measurable.
The floating, or insulating, potential is discussed in detail and expression is given showing good agreement with measured values.

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On the Sheen Gloss

Hirosi Hasunuma, Jiro Nara

1956 Volume 11 Issue 1 Pages 69-75
Published: January 05, 1956
Released on J-STAGE: June 01, 2007

DOIhttps://doi.org/10.1143/JPSJ.11.69

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Experiments of sheen gloss of metals and theoretical explanation of them are given. Sheen gloss is related with the specularly reflected light which appears by a incident angle above a critical angle θ_c. θ_c is connected with the r.m.s. roughness h as:
2hcosθ_c=λ⁄k k=2∼3
This formula is explained by a theory similar to the Kirchhoff’s diffraction theory, treating the roughness as a stationary random function given by Ornstein-Uhlenbeck process. Scattered light is separated to R- and D-comp. the former corresponds to sheen and its brightness is given as a function of incident angle ψ by
exp\left(−\frac16π²h²λ²cos²ψ\ ight).
D- comp. is the part that represents scattered light.

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A Cloud Chamber Study of the Cosmic-Ray Hard Showers

Saburo Miyake, Kensaku Hinotani, Kan-ichi Nunogaki

1956 Volume 11 Issue 1 Pages 76-83
Published: January 05, 1956
Released on J-STAGE: June 01, 2007

DOIhttps://doi.org/10.1143/JPSJ.11.76

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Cosmic ray hard showers produced in iron and in lead have been studied by using the multiplate cloud chamber at 2740 m above sea level.
Primary energies of the meson producing showers were estimated from the angular and the momentum distributions of the secondaries by various methods and the results were compared with each other. The observed hard showers were classified according to their median angles.
About half of the showers which belong to the smaller median angle group may be interpreted as that they have been produced at the periphery of the Pb nuclei. They amount to about 20% of total hard showers.
The mean free path for the production of hard showers was obtained as 25±50 gr/cm² in lead, and the mean free path of the charge exchange scattering of pions was 1.0±0.3 Kg/cm² in lead for energies greater than 1 Bev.

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On the Impurity Conduction in Germanium

Yasuo Kanai, Riro Nii

1956 Volume 11 Issue 1 Pages 83-84
Published: January 05, 1956
Released on J-STAGE: June 01, 2007

DOIhttps://doi.org/10.1143/JPSJ.11.83

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Pure Quadrupole Spectra of Phosphonitrile Chloride Polymers

Kazuo Torizuka

1956 Volume 11 Issue 1 Pages 84-85
Published: January 05, 1956
Released on J-STAGE: May 29, 2007

DOIhttps://doi.org/10.1143/JPSJ.11.84

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Sub-microwave Absorptions in Potassium Bromate

Yasaburo Yokozawa, Itaru Tatsuzaki

1956 Volume 11 Issue 1 Pages 85A
Published: January 05, 1956
Released on J-STAGE: May 29, 2007

DOIhttps://doi.org/10.1143/JPSJ.11.85A

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An Analysis of Two τ-Meson Decays

Kuni Imaeda, Mitsuko Kazuno

1956 Volume 11 Issue 1 Pages 85B-87
Published: January 05, 1956
Released on J-STAGE: June 01, 2007

DOIhttps://doi.org/10.1143/JPSJ.11.85B

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On the Image of Phase Microscope in Metastable Region

Shigenori Nawata

1956 Volume 11 Issue 1 Pages 87-88
Published: January 05, 1956
Released on J-STAGE: June 01, 2007

DOIhttps://doi.org/10.1143/JPSJ.11.87

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The Measurement of the Galvanomagnetic Tensors of Bismuth

Toshihiro Okada

1956 Volume 11 Issue 1 Pages 89
Published: January 05, 1956
Released on J-STAGE: May 29, 2007

DOIhttps://doi.org/10.1143/JPSJ.11.89

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Change of Photocurrent of CdS Single Crystal in a Magnetic Field

Sh\={o}ji Tanaka, Taiz\={o} Masumi, Sigeru Iijima

1956 Volume 11 Issue 1 Pages 90-91
Published: January 05, 1956
Released on J-STAGE: May 29, 2007

DOIhttps://doi.org/10.1143/JPSJ.11.90

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On the Transition Temperatures of Superlatties Au₃Cu and AuCu₃

M. Shimoji

1956 Volume 11 Issue 1 Pages 91-92
Published: January 05, 1956
Released on J-STAGE: May 29, 2007

DOIhttps://doi.org/10.1143/JPSJ.11.91

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On the Nature of Silent Electric Discharge

Kanji Honda, Yoshihide Naito

1956 Volume 11 Issue 1 Pages 92
Published: January 05, 1956
Released on J-STAGE: May 29, 2007

DOIhttps://doi.org/10.1143/JPSJ.11.92

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pp. 1010 line 11 (left side) 186 should be read 493.

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