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An inelastic neutron scattering investigation of high-temperature $\ensuremath{\beta}$ quartz by triple-axis spectrometry reveals the existence of a phonon branch with anomalously low and temperature-dependent frequencies. Near the Brillouin zone center, the mode is overdamped and unstable, and gives rise to a critica…
The mechanism of the hydrated nickel hydroxide electrode, used in the nickel cadmium battery, is a matter of considerable controversy. Potential sweep experiments were performed on film nickel hydroxide electrodes in an effort to determine the oxidation‐reduction mechanism. The existence of more than one reduced struc…
The diffusion coefficient for protons moving in the hydrated nickel hydroxide lattice has been determined using a potential step technique. It was found to have the value about during charging and during discharging for the nickel hydroxide structure usually found in the nickel electrode of the nickel‐cadmium battery.…
As far as the electrical conductivity is concerned, solids are usually classified as metals, semiconductors, or insulators. In metals the concentration of the charge carriers responsible for the electrical conductivity is large, whereas in semiconductors and insulators the carrier concentration is much smaller. The di…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDipole polarizabilities of ions in alkali halide crystalsJohn Norton Wilson and Richard M. CurtisCite this: J. Phys. Chem. 1970, 74, 1, 187–196Publication Date (Print):January 1, 1970Publication History Published online1 May 2002Published inissue 1 January 1970https://pubs.a…
The temperature rise in thin metallic foils under intense electron irradiation has been computed as a function of beam conditions, electron energy, and the physical properties of the foil. The model due to Gale and Hale was used in conjunction with the corrected Bethe electron energy loss formula for relativistic elec…
A new mathematical model of dynamic hysteresis loops is presented. The model is completely specified by two strictly monotonically increasing functions: a restoring function f(.) and a dissipation function g(.). Simple procedures are given for constructing these two functions so that the resulting model will simulate…
The present paper discusses pure liquid phases of long chain molecules each of them carrying heavy atoms « I » either at one end (case A) or at both ends (case B). For case A we find a non trivial I I correlation, due to the repulsion between carrier chains. For caxe B, the above effect competes against the direct cor…
Abstract The force required to stretch a polymer chain by 1% ( f value) was calculated from experimental values of elastic moduli E 1 in the direction of molecular axis and the cross‐sectional area of the molecule of 25 well known polymers. The f value is mainly dependent on the conformation of a molecule and almost i…
Opalescence and clearing techniques were used to determine the metastable immiscibility surface for sodium borosilicate solutions. These results indicate that a three‐liquid region, which may or may not be metastable to two‐liquid regions, underlies the immiscibility surface.
Palladium(II) acetate has a trimeric structure, of approximate symmetry D3h, in which each of the palladium atoms is joined to the other two by double acetate bridges.
Abstract Linear polyurethanes containing ionic centers at wide intervals are heteropolymers having a pronounced segment structure, i.e. ionomers. As a result of interactions between chains (Coulomb forces and hydrogen bonds), their properties are similar to those of crosslinked elastomers. They are strongly associated…
In this review we discuss the various ways in which dislocations interact with and provide sites for the segregation of point defects. Since there is, in general, a long-range interaction between a point defect and a dislocation, the kinetics of the migration of the point defects to the dislocations will depend on the…
The ultraviolet absorption spectrum of corundum (${\mathrm{Al}}_{2}$${\mathrm{O}}_{3}$) containing dilute concentrations of the $3d$-series transition-metal ions ${\mathrm{Ti}}^{3+}$, ${\mathrm{V}}^{3+}$, ${\mathrm{Cr}}^{3+}$, ${\mathrm{Mn}}^{4+}$, ${\mathrm{Fe}}^{3+}$, and ${\mathrm{Ni}}^{3+}$ was measured at room te…
Abstract Gorsky‐effect measurements on vanadium‐, niobium‐, and tantalum‐samples loaded with different concentrations (0.2 to 4.3 at%) of hydrogen or deuterium are reported. From the relaxation strength the trace of the dipole‐moment tensor of hydrogen and deuterium was determined and found to be consistent with the l…
Abstract not Available.
DEEP INELASTIC SCATTERING FOR 8 NUCLEAR TARGETS MEASURED AT SLAC TO INVESTIGATE A-DEPENDENCE OF THE EMC EFFECT. RESULTS ARE GIVEN AS RATIOS OF CROSS-SECTIONS WITH RESPECT TO DEUTERIUM. RANGE IS 0.09& lt;X& lt;0.9 AND 2 & lt; Q**2 & lt; 15 GEV**2.
Structure potentials, Vg, and absorption potentials for 100 keV-electrons are given in tabulated form for almost all monatomic crystals with elements Z = 3 to 90 and for a number of crystals of the rock-salt type. The absorption potentials are given in the form of the Fourier coefficients Ci0g of the Yoshioka imaginar…
Les modules élastiques des métaux de transition sont étudiés dans un modèle où l'énergie totale du cristal est écrite comme somme d'une contribution due à la bande d traitée dans l'approximation des liaisons fortes et d'une contribution répulsive de type Born-Mayer. Ce modèle permet de rendre compte de la variation du…
shown how this equivalence can be deduced from the consideration of either Numerical calculations were performed to find the optimum conditions for viewing single atoms, and it was observed that the contrast increases considerably when the accelerating voltage is raised above 100 KV. Simple analytic expressions are gi…