Effects of channel non-orthogonality in (d,p) reactions

Coupled channel calculations for (d, p) reactions were performed in which a strong coupling between the d and p channels was assumed. Reactions investigated were ¹⁶O(d, p) ¹⁷O(2s) and ⁴⁰Ca(d, p) ⁴¹Ca(2p) at E_d =10.5 MeV and the related (d, d) and (p, p) scattering processes. The nonorthogonality of the d- and p-channels were taken into account. The results of these calculations are presented and are compared with the coupled channel calculations neglecting the channel nonorthogonality and also compared with the DWBA and optical model calculations.     

Conductive phthalocyanines under very high pressure

Vanadyl, thorium, lead, copper, zinc and metal-free phthalocyanines become appreciably conductive under the static pressure of up to several hundred kilobars. The least resistivity observed is 0.1 $\text{Ω}$-cm for vanadyl phthalocyanine. There appear minima in the curves showing resistance change with pressure for vanadyl, thorium, lead and metal-free phthalocyanines.     

Comparison of the equilibrium geometry of acetylene (C2H2) and disilyne (Si2H2)

The equilibrium geometry of disilyne is not linear, but is twisted. The potential surfaces of acetylene and disilyne have a critical internuclear distance between the central atoms, where the stable geometry changes from linear to twisted forms the R-dependence of the valence-shell electron energy causes the difference in the structure of the molecules.     

Atomic emission spectrometry of metal oxides using shock tube excitation

The behavior of powdered samples in the region behind the incident and reflected shock wave were investigated. When the particle size is less than 8 μm, the powdered samples are effectively vaporized and excited to emit spectral lines. It was shown that the sample particles are scattered behind the incident wave and concentrated again in a narrow portion near the observation window by the use of a reflector so that intense emission can be attained. As an excitation source, the shock tube was used for the determination of trace metals contained in copper oxide.     

General description of mechanical anisotropy of semicrystalline polymers in relation to orientation of structural units composed of crystalline and noncrystalline materials

A mathematical representation of the transformation of an orientation function between two sets of Cartesian coordinates is discussed in terms of a series expansion of the distribution function in generalized spherical harmonics. A general procedure for calculating the mechanical anisotropy of a single-phase system (a polycrystalline material) from the orientation of its structural units and the intrinsic mechanical anisotropy of the structural unit is discussed in relation to the transformation of the orientation distribution function, i.e., mutual conversion of the coefficients in the expansion of the distribution function between the two sets of Cartesian coordinates. The procedure is extended to a two-phase systems (semicrystalline polymers) containing structural units composed of crystalline and noncrystalline materials in three different geometrical arrangements.     

The valence band structure of metal hexaborides: An ESCA study of CaB6, and YB6

Two typical hexaborides CaB₆ and YB₆ have been studied by X-ray photoelectron spectroscopy (XPS or ESCA). The ESCA spectra of these compounds in the energy band region can be explained successfully by the calculation of Longuet-Higgins and Roberts rather than those of other authors. This means that covalent bonding between the boron and metal atoms in the hexaborides is weak. Therefore, we can regard divalent-metal hexaborides such as CaB₆ as “ionic crystals” which can be expressed approximately as M²⁺(B₆)^2?. At the same time, trivalent-metal hexaborides such as YB₆ are thought to be metals in which the conduction electron concentration is one per unit cell.