The general expression of energy-levels of an excited rare-gas atom is derived using Breit's Hamiltonian. The interactions between all electrons in the atom are taken into account. The derived expression agrees qualitatively with Laporte's formula. The numerical values of intervals between levels are computed for the configurations 1s²2s²2p⁶3s, 1s ²2s²2p⁶4s, and Is22s22p58s of the neon. The self-consistent field radial functions computed by Brown are used for 1s, 2s and 2p. Those of 3s, 4s, and 8s are calculated from Brown's core-functions by the numerical integrations. The calculated results are shown in Table I. The agreement with experiment is satisfactory

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The inversion of doublets of ueutral alkali atoms is explained by the cause that the screening constant due to the spin-orbit interaction between the valence electron and the atomic core is greater than the atomic number. The general formula of alkali doublets is derived, taking into account the electromagnetic interactions between all atomic electrons. The numerical calculation is carried out for 1s² 2s² 2p² 3s² 3p⁶ 3d¹⁰ 4f ²F^21/2, ^21/2 of Cu. The calculated interval of the doublet is -4.0 cm^-1 which agrees with the observed value -3.6 cm^-1

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Thin films of molybdenum oxide were formed by subliming MoO₃ in vacuum on the cleavage face of molybdenite polished surfaces of metals at a temperature t and their strueture was investigated by the method of cathode-ray diffraction. It was found that the strueture depends upon the nature of the base and the temperature t as summarised in the following table. The substance denoted by [MoO₃] in the table is supposed to be an intermediate oxide between MoO₂ and MoO₃ The substance which produced the diffuse rings has not been identified. In the pattern of MoO₂ single crystal, extra spots were observed and they are interpreted as due to a superstructure of MoO₂ crystal

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Intensity of gamma-rays emitted from Fe, Cd, Hg and Bi by slow neutron capture was measured as a function of thickness of paraffin layer interposed between a D+D neutron source and a detector. From analyscs of the obtained gamma-ray intensity curves and measurements of energy by boron absorption method it is shown that Hg has a clear resonance neutron group of about 10 e.V. in energy, Cd has several groups of energies from several tens of e.V. to a few e.V. and the mean energy of these groups plus the residual part of the first group (Er=0.17 c.V.) not absorbed by Cd filter of 0.43 g/cm ² thick is about 2 e.V., Bi has resonance group giving a maximum of gamma-ray intensity at about 57 cm of paraffin thickness, and Fe has no distinct resonance groups

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The beta-ray spectrum of radio-chlorine (37.3 min) was investigated by the use of magnetic spectrometer. The beta-rays are composed of at least two clearly resolved groups. The upper limit of the spectrum was 4.99 mev. Some discussions are given about the Fermi and K.-U. plots. From 2.6 mev. to the end point of the spectrum Fermi plots lie on a straight line. By the absorption method, the maximum range of electrons was found to be 2.37gr/cm² and the extrapolation of Feather's range-energy relation is discussed

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Six radioactive decay periods of arsenic have been investigated by hombardbag brornine, selcuium, arsenie and germanium with fast and slow neutrons and deuterons. General results obtained are sunnuarised in the. fnloping table. Bombardments Decay Periods Br+FN 65m±3 26h±1 Br+Sn 65m 26h 16d ±1 Sc+FN 65m 26h As+FN 26h 16d As+SN 26h Ge+D 90d±10 16d 88m±5 50h±5 Chemistry As As As As − − Assigmment AS⁷⁸ As⁷⁷ As⁷⁶ As⁷⁴ As⁷⁸? As⁷¹? Isotopes As⁷⁸ As⁷⁷ As⁷⁶ As⁶⁴ As⁷³? As⁷¹? Decay periods 65m±3 90d±10 26h±1 16d±1 88m±5 50h±5 Sign e⁻ e⁻ e⁻ e^± e⁺ e⁺ K.U.Upper 2.75 0.9(e⁺)limit(Mev) 1.4 0.12 1.31 1.3(e−) − − γ ray(Mev) 0.27 yes 1.5 yes yes yes

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The Young's modulus and the rigidity modulus of iron single crystals of various orientations were determined by a dynamical method.: the longitudinal or the torsional vibration of the specimen rod was excited magnetically by making use of Joule's or Wiedemann's magnetostrictive deformation, and the coincidence of the frequency of the exciting current, with the natural frequency of the rod was detected by the change in the impedance of the coil wound around the specimen rod. From the values of these elastic moduli, the Voigt's moduli were evaluated The conrrections to he applied (due to the coupling of the torsional and the bending deformations, due to the thickness of the specimen rod, due to the external magnetic field and due to the adiabatic nature of the experimental process) were discussed in detail. The final values obtained were: S₁₁=0.768×10 ^-12, S₁₂=-0.270×10^-12 and S₄₄ =0.896×10^-12. In Appendix, the results of the statical measurements were shown for the purpose of comparison

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