Q-values have been measured for (p, n) reactions on Na²³, Al²⁷, Cu⁶³, Cu⁶⁵, Ga⁶⁹, Ge⁷⁴, Se⁷⁷, Se⁷⁸, Se⁸⁰, Y⁸⁹, Sn¹¹⁸, and Sn¹²⁰ by detecting slow neutrons associated with the thresholds. Using the well established threshold energies of (p, n) reactions on Li⁷, C¹³, and F¹⁹ as calibration standards, the following Q-values were obtained:
(Remark: Graphics omitted.)
These results are compared with the previously reported Q-values.

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Theoretical expressions for the galvanomagnetic tensor in weak magnetic field, the electronic specific heat and the thermoelectric power of cadmium single crystal are derived. As a model of the band structure it is assumed that there is a lens-shaped segment of the Fermi surface for the electrons and three segments of anchor ring shape for the holes. The numerical values of the parameters contained in this model are determined by comparison with experiments. The number of electrons or holes and the mobilities at room temperature are found to be 4×10²¹ cm⁻³ and of the order of 10⁻⁷ e.m.u. respectively.

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The nuclear magnetic resonance of ²³Na was observed in NaCl crystals containing a systematic series of foreign ions, Li⁺, K⁺, Rb⁺, F⁻, Br⁻ and I⁻ as substitutional impurities.
From the observed variation of absorption intensities with solute concentrations, the displacements of nearest-neighbor ions around these solutes were estimated, using the reported values of a gradient-elastic tensor. Results thus obtained are found to agree well with those calculated theoretically and those derived from x-ray data of lattice parameter changes.
Observation with single crystalline samples has led to the conclusion that anisotropy of distortion is much more pronounced near the core region than in the distant region from solute ions.

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New type defects on {111} planes have been observed in quenched pure aluminum with a transmission electron microscope. The new type defect has the shape of a double loop with edges parallel to ⟨110⟩ directions, and its outer loop is hexagonal in shape and its inner loop triangular. From their image contrast, their shape and their annealing behavior, the double loop can be understood to be constructed of two overlapping Frank sessile loops on successive atomic planes. The nature of double loop suggests that the interaction energy of stacking faults, one atomic plane apart, is fairly large.

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The temperature dependence of the X-ray diffraction intensity was precisely measured in order to clarify the nature of the ferroelectric phase transition in NaNO₂. At the transition point, 163°C, the integrated intensity of the Bragg reflection decreases quite abruptly and distinct satellite peaks appear which are observed in a very narrow temperature range and which become diffuse with increasing temperature. It was concluded that the ferroelectric NaNO₂ crystal transforms through the first order transition to an antiferroelectric phase with a sinusoidal modulation of the moment in which the antiferroelectric order is partially attained. The system again meets with another transition to the paraelectric phase at certain temperature above the first transition point. A thermodynamic calculation on the basis of a molecular field approximation was performed. The successive appearance of three phases, the orders of transitions, the temperature dependence of the order parameter and the anomalous volume expansion are satisfactorily explained by this calculation.

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The relaxation time tensor components for ionized impurity scattering in semiconductors with ellipsoidal energy surfaces are derived on the basis of the Herring-Vogt formalism. Numerical evaluation is performed for n-type germanium and n-type silicon. It is found that the anisotropy of ionized impurity scattering is dependent on energy. The mobility and the effective anisotropy parameter K=μ_⊥⁄μ_|| for n-Ge are evaluated by using the calculated relaxation times for ionized impurity scattering and the experimentally determined lattice scattering mobility. Fair agreement between theory and experiment is obtained at liquid nitrogen temperature for carrier concentrations smaller than 10¹⁷/cm³.

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The effect of temperature from 273°K to 410°K on diamagnetic anisotropy in the single crystals of succinic acid and potassium hydrogen succinate is studied in details and the results are discussed from structural point of view.

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Nuclear spin-lattice relaxation due to quadrupole interaction of Cl³⁵ in a single crystal of NaClO₃ under an applied magnetic field was investigated by using saturation- as well as double resonance-techniques. The relaxation through Δm=1 was found to be more effective than that through Δm=2. The experimental result at room temperature can be accounted for by Bayer’s theory, if we assume an appropriate life time of the excited vibrational state. When one of the high frequency lines was pumped, an enhanced absorption or emission of the low frequency Zeeman line was observed, which corresponds to nuclear three level maser effect. Finally chemical shift of Cl³⁵ in this crystal was measured for two different orientations. The absolute value and a slight anisotropy of the shift can be well explained by second-order paramagnetic shift.

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The electron spin resonance of Fe³⁺ ion in the orthorhombic and rhombohedral phases of BaTiO₃ has been studied. Distinct spectral lines were obtained at orthorhombic phase by biasing the crystal upon cooling. At orthorhombic phase, sign of D was found to be reversed to that of \acutea and E has been verified to be vanishingly small. At rhombohedral phase, both intense spectrum with cubic field splitting and a weak anisotropic spectrum have been observed. The pertinent spin Hamiltonian parameters are determined in these two mentioned phases. Calculations of field gradient components based on the ionic model are given and compared with experiment. Some comments and conjectures are offered as to possible correlation of these results with existing theories on S-state ion and on ferroelectric BaTiO₃.

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The electron spin resonance study of Nd³⁺ in cadmium sulfide single crystal has been done at 1.4°K and X-band. The observed spectra consist of a strong line due to even isotopes and satellite lines coming from the hyperfine interaction with nuclei of odd isotopes. They can be explained by using the spin Hamiltonian, \mathscrH=g_⁄⁄βH_zS_z+g_⊥β(H_xS_x+H_yS_y)+AI_zS_z+B(I_xS_x+I_yS_y) where the c-axis of the crystal is chosen as the z-axis. The parameters are g_⁄⁄=0.43±0.05, g_⊥=3.409±0.005, |B|=(342±5)×10⁻⁴ cm⁻¹ for ¹⁴³Nd, and |B|=(213±3)×10⁻⁴ cm⁻¹ for ¹⁴⁵Nd. The crystal field around Nd³⁺ in cadmium sulfide has the symmetry of C_3v. The ground state (⁴I_9⁄2) splits into five doublets by this crystal field. Judd’s theory of Nd³⁺ in double nitrate is applied to this case to discuss the ground state of Nd³⁺ in cadmium sulfide. The ground state wave function is constructed as a linear combination, 0.2490|9⁄2, \mp5⁄2>±0.9685|9⁄2, ±1⁄2>. Besides Nd³⁺ resonance lines, several lines have been observed. Paramagnetic centers which are responsible for these lines are discussed.

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The ordered spin arrangement of the orthorhombic anhydrous cobalt sulfate α–CoSO₄ (low temperature modification) in the antiferromagnetic region is considered. By assuming the four sublattice model, and by replacing the spin operators in the appropriate spin Hamiltonian by the classical spin vectors, we look for the lowest energy state of spin direction. The neutron diffraction pattern obtained by Frazer and Brown can be explained as due to the large anisotropy. The exchange integral between the nearest neighbours along c-axis J′ and that of in ab-plane J″ which give rise to the ordered spin arrangement deduced by Frazer and Brown are discussed by use of the magnetic data.

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A new potential energy function for diatomic molecules U(r)=D_e+D_e{(a+b)e^−2αr−be^−αr}(1+ce^−αr)⁻², is proposed. This function has the advantage that the Schrödinger equation can be solved exactly. The parameters a, b, c and α can be determined so as to fit calculated values of D_e, k_e, r_e and β_e to the observed ones. As to ω_ex_e, agreement with the observation is not bad, whereas the Morse curve does not give satisfactory result for several molecules.

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It is shown that the radiation from plasma oscillation in a spatially homogeneous plasma is possible as the co-operative phenomena of the radiation with a stationary growing of plasma oscillation and as the emission of photons due to the mediation of the electrons forming a beam. The radiation intensities are also evaluated.

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By taking account of plasma oscillations and a spatial variation of electron density and solving the nonlinear Boltzmann and the Poisson equations by the perturbation method, the harmonic components of the distribution function of electrons, the intensity of inner electric field of plasma and the discharge current density are found in the case of plasma resonance. Then a harmonic power conversion ratio is derived and compared with experiments. Finally, the effect of the velocity dependence of collision frequency on the harmonic power is discussed.

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The unsteady flow of an incompressible elastico-viscous Maxwell fluid between two parallel plates, the upper one of which is fixed and the lower one is started impulsively from rest, is studied. It is assumed that a magnetic field perpendicular to the plates is present, no external electric field is imposed and the magnetic Reynold’s number is very small. Laplace transforms have been used to get the velocity field in the fluid and the skin friction at the lower plate. It is found that the elasticity of the fluid retards the fluid motion and increases the skin friction.

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The formation of Couette flow between two parallel walls due to the impulsive and uniformly accelerated motion of one of the walls in an electrically conducting viscous, incompressible fluid is discussed at small magnetic Reynolds numbers. A uniform suction velocity is imposed on the walls.
Expression for the skin friction coefficient is obtained in terms of two non-dimensional parameters the Hartmann number M and the suction parameter S. The skin friction is found to increase as M or S increases.

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Solutions for the flow of a viscous, incompressible and electrically conducting fluid past an infinite porous flat plate in the presence of a uniform transverse magnetic field are obtained by using Laplace transform. It is assumed that the magnetic Reynolds number is small and velocity component normal to the plate uniform. A general formula is obtained for the velocity distribution in the boundary layer as a function of the given free stream velocity and from this, general formulae for the skin friction and displacement thickness are obtained.

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