Production of Multimeson Resonances byπ+pInteraction and Evidence for aπωResonance
Received 6 September 1963DOI:https://doi.org/10.1103/PhysRevLett.11.381©1963 American Physical Society
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The effect of melt temperature on nucleation in crystallizing polymers
Abstract A study has been made of the temperature dependence of the nucleation process in poly(ethylene oxide), and also of the related bulk crystallization rate determined from dilatometric experiments. Variations in these quantities were found, both above and below the melting point, and these are discussed in relat…
Thermal Conductivity of III-V Compounds at High Temperatures
The thermal conductivity of intrinsic and heavily doped InAs crystals was determined between 300 and 900\ifmmode^\circ\else\textdegree\fi{}K using the diffusivity technique. The electronic contribution was computed using the measured electrical conductivity and the Seebeck coefficient. Adding 3\ifmmode\times\else\text…
Cohesive‐energy‐densities of high polymers. Part. III. Estimation of C. E. D. by viscosity measurements
Abstract The intrinsic viscosities and the slopes of η sp /C against C were estimated for natural rubber, polystyrene, and polyisobutene in hydrocarbon and high mol.wt. alkyl ester solvents. Whereas no correlation could be established between slopes and c.e.d. (cohesive energy‐densities) balance of the systems, the pl…
Aragonite and Calcite as Constituents of Adult Oyster Shells
Adult oyster shells are composed mainly of calcite, but there are five small areas of aragonite: the resilium, the two pads at which the adductor muscle is inserted, and the two pads at which Quenstedt's muscles are inserted. Quenstedt's muscles are proposed as a name for the small modified, one-time pedal muscles of…
Origin of the Electron Microscope
history of a great invention, and of a misconception concerning the inventors, is reviewed. In 1878, Ernst Abbe (1) proved that the resolution of the optical microscope is limited by the wavelength of light. This meant that even when immersion optics and ultraviolet light are used, the smallest detail that can ever be…
The crystal structure of potassium tetraborate tetrahydrate
The compound K2B40~.4H20 = K~[B4Os(OH)4].2H20 is orthorhombic, space group P212121, with four molecules in a cell of dimensions a = 12"899, b = 11.774, c = 6"859 A. The positions of all atoms (including the hydrogen atoms) have been determined. The final R-index is 0.040, and the bond lengths have been determined to a…
The crystal structure of the δ phase Mo–Ni
The crystal structure of the (~ phase, Mo-:Ni (49-2 __0.2 at.% Mo) has been determined by singlecrystal X-ray analysis. For the orthogonal cell a=b =9.108 +0.005, c=8.852 +0.005 A, Z(exp)= 55.8 __ 0.2. Earlier unsuccessful trials were based on space group P4~212, although there are significant deviations toward orthor…
On the crystal structure of the manganese(III) trioxides of the heavy lanthanides and yttrium
The preparation, determination of optical properties, and approximate crystal structure of the ferroelectric manganese (III) trioxides of holmium, erbium, thulium, ytterbium, lutetium, and yttrium are reported. The compounds crystallize in the hexagonal system, probable space group P6acm , and their structure is chara…
Long Term Air Corrosion of Several Nickel-Based Alloys
In order to provide corrosion data on prospective fuel pin cladding alloys for the ML-1 nuclear reactor, four nickel-based alloys: Inconel 600, Inconel 702, Hastelloy X and Nichrome V, were tested in air at 300 psi and 1750 F for durations up to 10,000 hours. Weight changes were determined after various exposure perio…
Untersuchungen mit Korrosionsinhibitoren in der Gasphase
Abstract Aus Untersuchungen über die Korrosionshemmung durch Dichamin und seine Salze in der Gasphase wird geschlossen, daß die im Gegensatz zur wäßrigen Lösung ausgezeichnete Inhibitorwirkung des Dichamins eine Folge seines hohen Dampfdruckes und der Bildung eines hydrophoben Adosrptionsfilmes an der Metalloberfläche…
Epitaxial Growth of Germanium Using Water Vapor
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 R. F. Lever, F. Jona; Epitaxial Growth of Germanium Using Water Vapor. J. Appl. Phys. 1 October 1…
Glass transitions in polypropylene
Abstract Dilatometric measurements show that both isotactic and atactic polypropylenes have two distinct glass transition temperatures. Because of the two transitions, three values for the cubical coefficient of thermal expansion are necessary to accurately define the volume expansion of polypropylene from −80° to +90…
Evaluation of molecular weight averages resulting from random crosslinking and chain scission processes for wide schulz‐zimm distributions
Abstract The Monte Carlo sampling technique was used to evaluate the resulting molecular weight averages and the intrinsic viscosity for wide Schulz‐Zimm distribution polymers, in the range P̄ w /P̄ n ≦ 11, undergoing random chain scission and crosslinking processes. The results may also be used to evaluate the initia…
Changes in Certain Structural and Mechanical Properties of Cotton Cellulose with Progressive Acetylation
Scoured cotton yarns were acetylated by two processes: (1) by a 1:3 mixture of acetic anhydride and acetic acid to give a series of low- and medium-substituted products (PA); and (2) a 1:1 mixture of acetic anhydride and isopropyl acetate to give a series of medium- to highly-substituted products (FA). Perchloric acid…
Color and Efficiency of Luminescent Light Sources
Calculations have been made for the color and luminous efficiency of single phosphors and of blends of such phosphors. In the latter case, all the emission is assumed to come from the phosphors so that the results apply to cathode-ray tubes or to electroluminescent lamps, but not to fluorescent lamps. In these calcula…
Observation of Oscillatory Magnetostriction in Bismuth at 4.2°K
Received 3 September 1963DOI:https://doi.org/10.1103/PhysRevLett.11.331©1963 American Physical Society
The present state of quantitative X-ray microanalysis Part 2: Computational methods
In x-ray microanalysis allowance must be made not only for absorption of x-rays but also for the effects of penetration, diffusion and backscattering of the incident electrons. In view of the impossibility of pursuing separately every electron path, a simplified diffusion model is proposed and calculations based on th…
STIMULATED EMISSION IN RARE-EARTH CHELATE (EUROPIUM BENZOYLACETONATE) IN A CAPILLARY TUBE
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 Erhard J. Schimitschek; STIMULATED EMISSION IN RARE‐EARTH CHELATE (EUROPIUM BENZOYLACETONATE) IN…
Acidodiethylenetriaminegold(III) Complexes: Preparation, Solution Chemistry, and Electronic Structure
The preparation of acidodiethylenetriaminegold (III) salts with the general formula (Au(dien)X) X2 (dien NH2C2H4NHC2H4NH2 and X Cl(-), Br(-) is reported. The complexes are acids in aqueous solution, ionizing a proton from one of the amine nitrogen atoms. The resulting con jugate bases, (Au(dien-H)X) X (dien-H) dien le…