Elastic Constants of Single-Crystal Mo and W between 77° and 500°K
Using a high frequency cw mechanical resonance technique, the adiabatic elastic constants of single crystals of molybdenum and tungsten were measured between 77° and 500°K.
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Work Function, Photoelectric Threshold, and Surface States of Atomically Clean Silicon
The position of the Fermi level at the surface has been determined over the entire available range of bulk dopings for atomically clean (111) silicon surfaces cleaved in a vacuum of ${10}^{\ensuremath{-}10}$ mm Hg. Surface potential is found from the difference in work function and photoelectric threshold. The latter…
Das Adsorptionsverhalten sehr dünner Kohlenstoff‐Folien
Sehr dünne Kohlenstoff-Folien wurden erhalten: durch Reduktion einer Suspension von Graphitoxyd (G. O.) in verdünnter Natronlauge, durch Verpuffung von G. O. beim Erhitzen. Die Adsorption von Stickstoff, von Methylenblau und von Phenol wurde gemessen; außerdem wurde die katalytische Leistung bei der HBr-Synthese besti…
Spin-Lattice Relaxation in Some Rare-Earth Salts at Helium Temperatures; Observation of the Phonon Bottleneck
By observing the transient recovery of microwave paramagnetic resonance signals at $\ensuremath{\nu}\ensuremath{\approx}9.3$ kMc/sec and $\ensuremath{\nu}\ensuremath{\approx}34$ kMc/sec, we measure the spin-lattice relaxation rate ${{T}_{1}}^{\ensuremath{-}1}$ for the rare earth ions Nd, Pr, and Sm in the double nitra…
Ordering Energy Levels of Interacting Spin Systems
The total spin S is a good quantum number in problems of interacting spins. We have shown that for rather general antiferromagnetic or ferrimagnetic Hamiltonians, which need not exhibit translational invariance, the lowest energy eigenvalue for each value of S [denoted E(S) ] is ordered in a natural way. In antiferrom…
Observations sur l'accouplement des Chiropters
Digital Repository of Scientific Institutes (RCIN) was established and is being developed mainly as an outcome of two projects acquired and jointly accomplished by a group of Polish scientific institutes.
Aragonite in the Resilium of Oysters
Aragonite (orthorhombic CaCO 3 ) composes some of the fibers of the resilium of Crassostrea virginica (Gmelin).
The Boltzmann equation for anisotropic metals
Abstract It is pointed out that the Boltzmann equation in the theory of metals reduces to a finite set of linear algebraic equations whenever the scattering probability can be written as a finite sum of the form Σpi(k) qi(k´) . The explicit form of the solution, valid for arbitrary energy surfaces, is derived for this…
Low-Temperature Thermal Conductivity of Amorphous Solids
The thermal conductivities of five samples of commercial glasses and glass ceramics were measured at liquid helium temperatures. It was found that the conductivity data could be accounted for by an intrinsic structure scattering of phonons as proposed by Klemens combined with an internal boundary scattering. The intri…
Space-Charge-Limited Currents in Iodine Single Crystals
Transient and steady-state measurements of space-charge-limited hole photocurrents in iodine generated at one electrode are presented. The hole drift mobility perpendicular to the $\mathrm{ac}$ crystallographic plane is 0.7 ${\mathrm{cm}}^{2}$/v sec and varies with temperature approximately at ${T}^{\ensuremath{-}1.2}…
Optical Emission from Irradiated Foils. I
The present work is concerned with the emission of optical radiation from foils irradiated with charged particles. A generalization of the Ginsburg-Frank treatment is presented in which the wave properties of normally incident charged particles are accounted for in the Born approximation. The foil is assumed to be of…
Nuclear Magnetic Resonance Study of Collagen Hydration
The proton resonance signal of water in partially dried tendon shows three peaks for samples equilibrated in an atmosphere of 30%—80% relative humidity (R.H.). The outer-peak splitting (between 0.5 and 1 gauss) has the character of a proton-pair splitting with effective interactions in, or close to, the fiber directio…
Theory of Transient Space-Charge-Limited Currents in Solids in the Presence of Trapping
The problem of transient space-charge-limited currents in insulating and conducting crystals is treated mathematically. With a number of simplifying assumptions, solutions are derived for the time-dependent current and space-charge distribution following the onset of injection, the latter taking place via an ohmic con…
The Electron Spin Resonance Absorption of the Complexes of Aromatic Sulfur Compounds with Lewis Acids
Minoru Kinoshita, Hideo Akamatu; The Electron Spin Resonance Absorption of the Complexes of Aromatic Sulfur Compounds with Lewis Acids, Bulletin of the Che
Calcination and Sintering Study of Thoria
Data on the effect of calcination temperature on surface area, apparent crystallite size, compactibility, sintered density, and volume shrinkage are presented for thoria prepared from the oxy‐carbonate, chloride, nitrate, and oxalate. Surface area and volume shrinkage decreased with rising calcination temperature. Tho…
Preparation of Substituted Glycolurils and Their N-Chlorinated Derivatives
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation of Substituted Glycolurils and Their N-Chlorinated DerivativesFrank B. Slezak, Henry Bluestone, Thomas A. Magee, and John H. WotizCite this: J. Org. Chem. 1962, 27, 6, 2181–2183Publication Date (Print):June 1, 1962Publication History Published online1 May 2002Pub…
X-ray Measurement of Scattering Factors of Manganese and Oxygen Atoms in Manganous Oxide
The atomic scattering factors of manganese and oxygen atoms in manganous oxide (MnO) were determined by measuring the integrated x-ray intensities of reflections from powder sample at room temperature. The intensities measured on a relative scale for five differently colored samples within an experimental error of ±0.…
Fatigue in Textile Fibers
Equipment on which six fiber specimens can be simultaneously fatigued in cyclic tension, at one common strain amplitude, has been developed and constructed. Fre quencies are continuously variable from zero to 18 cycles/sec, and the total stroke is adjustable from zero to 1 in. Provisions are made for the automatic tak…
The Dipole Moment and Structure of Thiolactams
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Dipole Moment and Structure of ThiolactamsCalvin M. Lee and W. D. KumlerCite this: J. Org. Chem. 1962, 27, 6, 2052–2054Publication Date (Print):June 1, 1962Publication History Published online1 May 2002Published inissue 1 June 1962https://pubs.acs.org/doi/10.1021/jo01053…
Halbleitereigenschaften des Lanthankobaltit
Thermokraft, elektrische Leitfähigkeit und HALL-Effekt unterschiedlich dotierter n- und p-leiten-der LaCoO 3 -Proben wurden über einen größeren Temperaturbereich gemessen. Die Meßergebnisse konnten mit dem Modell des „kleinen Polaron“ gedeutet werden, nach dem die Transporteigenschaften durch thermisch aktivierte Plat…