Materials Literature
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It is reported that a hitherto unexplained optical transition in ZnTe is due to oxygen substituting isoelectronically for Te. A classification of isoelectronic traps into isoelectronic donors and acceptors is made. One striking difference between these two classes is apparent in the phonon sidebands of the $J=1$ and $…
Magnetization curves from $T=0.15$\ifmmode^\circ\else\textdegree\fi{}K to ${T}_{c}$ have been measured for two specimens of semiconducting SrTi${\mathrm{O}}_{3}$ of electron density about ${10}^{20}$ ${\mathrm{cm}}^{\ensuremath{-}3}$. Magnetic hysteresis was observed in each case. The temperature dependences of the fi…
A comprehensive theoretical expression for the spin-lattice relaxation time in the rotating frame ${T}_{1\ensuremath{\rho}}$ is derived for the case of weak collisions. Starting from the laboratory-frame dipolar Hamiltonian and retaining both secular and nonsecular terms, the doubly-rotating-frame Hamiltonian is deter…
This paper represents an attempt to estimate the ionic contributions to the ground-state splitting of the trivalent gadolinium ion in a lanthanum ethyl sulfate lattice. The energy levels of the $4{f}^{7}$ configuration are calculated and compared with those observed experimentally. The calculated ground-state $g$ fact…
Abstract The official method for iodine in iodized salt, 31.064–31.067, was studied to determine interference from sodium thiosulfate added as a stabilizing agent; no interference was found. The present official method for iodine in iodized salt is reliable, and study of methods should be discontinued.
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Thomas F. Deutsch, Marvin J. Weber; Optical Properties of Cryptocyanine. J. Appl. Phys. 1 August…
Beschreibung zweier Kurzzeitverfahren zur Untersuchung der Korrosionsbeständigkeit von phosphatierten Stahlblechen. Untersuchungsergebnisse. Vergleiche mit dem Salzsprühversuch.
Physical and mechanical properties of aluminum- mylar-aluminum composite material for Echo II BALLOON
New data obtained on the join Ca 2 SiO 4 ‐CaMgSiO 4 established a limit of crystalline solubility of Mg in α‐Ca 2 SiO 4 corresponding to the composition Ca 1.90 Mg 0.10 SiO 4 at 1575°C. The α‐α’Ca 2 SiO 4 inversion temperature is lowered from 1447° to 1400°C by Mg substitution in the lattice. α'‐Ca 2 SiO 4 takes Mg in…
The accumulation of irradiation damage in graphite crystals under neutron irradiation at temperatures between 150°c and 650°c is discussed using recent ideas on nucleation of planar clusters of interstitial atoms and the collapse of lines of vacant lattice sites produced by chance sequences of atomic displacement. It…
The corrosion of downward‐facing surfaces has often been associated with the presence of gas bubbles. Model work with methanol‐water and other systems has shown that rapid upward drilling does occur around gas bubbles. A mechanism is suggested which could also be applied to flux‐line attack.
Abstract A method is described for the conversion of polystyrene to poly(styrenesulfonic acid) without change in the molecular weight distribution; the reaction is performed at room temperature in 100% H 2 SO 4 and uses Ag + catalyst. The resulting polyelectrolyte has solubility and other characteristics significantly…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation W. F. Leonard, R. L. Ramey; Temperature Coefficient of Resistance in Thin Metal Films. Journal of…
Although certain liquids show Arrhenius viscosity behavior over the whole liquid range, most liquids have a substantial non-Arrhenius range in which their viscosity is described by the free-volume equation. In a few supercooled liquids, there are two distinct non-Arrhenius regions. From a calculation of the volumes re…
The ESR spectra of the powder samples of cubic ZnS:Mn, hexagonal ZnS:Mn, and CdS:Mn are treated theoretically for the case where the exchange interaction exists between the Mn 2+ ions. The comparison of the calculation with experiments indicates that, for a pair of Mn 2+ ions, the resonance spectra are well described…
Abstract Epitaxial deposition of homopolymers from solution [polyethylene, isotactic polystyrene, poly‐3,3‐bischloromethyloxacyclobutane (Penton) and polypropylene] was found on the (001) faces of cleaved alkali halide single crystals. Electron and optical microscopy studies have shown that the polymer usually grew fr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDynamic Mechanical Properties of Cross-Linked Rubbers. III. Dicumyl Peroxide Vulcanizates of Natural Rubber1Ray A. Dickie and John D. FerryCite this: J. Phys. Chem. 1966, 70, 8, 2594–2600Publication Date (Print):August 1, 1966Publication History Published online1 May 2002Pub…
The effect of pressure to over 200 kbars has been measured on the lattice parameters of iodine, stannic iodide, and of p-di-iodobenzene. All three have a large component of van der Waals binding and each exhibits a compressibility which decreases with increasing pressure. On the basis of the estimated change in distan…
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSubstituted Deuteroporphyrins. I. Reactions at the Periphery of the Porphyrin Ring1Winslow S. Caughey, James O. Alben, Wilfred Y. Fujimoto, and J. Lyndal YorkCite this: J. Org. Chem. 1966, 31, 8, 2631–2640Publication Date (Print):August 1, 1966Publication History Published o…