Nuclear Resonance in EuS from 4.2°K to the Critical Temperature Region
Received 18 December 1964DOI:https://doi.org/10.1103/PhysRevLett.14.71©1965 American Physical Society
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Effect of Applied Fields on the Optical Properties of Color Centers
A theoretical analysis is made of the effect of an external perturbation, such as an electric field, magnetic field, or stress, on the optical properties of color centers. Our analysis is restricted to centers with orbital singlet ground states. It is especially applicable to centers with orbitally degenerate excited…
Effect of Hydrostatic Pressure on the Self-Diffusion Rate in Single Crystals of Gold
The rate of self-diffusion in gold was measured by the radioactive-tracer-lathe-sectioning technique at 860, 910, and 960\ifmmode^\circ\else\textdegree\fi{}C and at hydrostatic pressures from 2.00 to 9.08 kbar. The diffusion rate was observed to decrease with increased pressure, and the activation volume for self-diff…
Neutron Diffraction Study of Temperature-Dependent Properties of Palladium Containing Absorbed Hydrogen
Neutron diffraction techniques have been employed to study the hydrogen-atom configuration in a single-phase sample of beta-PdH at several selected temperatures. The suggested low-temperature ($T\ensuremath{\ll}55\ifmmode^\circ\else\textdegree\fi{}$K) structure of this compound is one which conforms to the space group…
Photoluminescence of Defect-Exciton Complexes in II-VI Compounds
Received 14 December 1964DOI:https://doi.org/10.1103/PhysRevLett.14.64©1965 American Physical Society
Raman Spectra of Liquid AlCl3·KCl and AlCl3·NaCl
The Raman spectra of AlCl3·KCl (solid and liquid) and AlCl3·NaCl (liquid) were recorded using a Cary 81 Raman spectrophotometer. Both solid and liquid AlCl3·KCl exhibit nine Raman lines. For liquid AlCl3·NaCl, only four Raman lines were observed. Polarization measurements indicate the existence of the complex species…
Magnetic Susceptibility and Crystal Structure of (Pyridine N-Oxide)-Copper(II) Chloride
Magnetic susceptibility of (pyridine N-oxide)-copper(II) chloride, C5H5NOCuCl2, has been measured by the Faraday method from 90° to 300°K. The magnetic moment decreases rapidly with temperature; the dimeric structure proposed on the basis of magnetic behavior has been confirmed by the results of crystal structure dete…
Excitation of Methane, Ethane, Ethylene, Propylene, Acetylene, Propyne, and 1-Butyne by Low-Energy Electron Beams
Low-energy inelastic collisions between electrons and hydrocarbon molecules are studied by means of a trapped-electron technique. Excitation spectra are obtained over the subionization energy range for methane, ethane, ethylene, propylene, acetylene, propyne, and 1-butyne. Molecular excitation potentials are measured,…
Anomalous Thermoluminescent Kinetics of Irradiated Alkali Halides
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 J. A. Partridge, C. E. May; Anomalous Thermoluminescent Kinetics of Irradiated Alkali Halides. J.…
Kinetics of the calcite ⇌ aragonite transformation
A beryllium pressure vessel mounted in an X-ray diffractometer has been used to study the rates of the transformation calcite ⇌ aragonite at temperatures to 500°C and pressures to 15 kb. The rates of transformation are shown to be both temperature and pressure dependent. It is proposed that the tail-off shown by all r…
Kinetic Secondary Electron Ejection from Molybdenum by Cesium Ions
Secondary electron emission yields have been measured for cesium ions on clean molybdenum as a function of ion kinetic energy for two angles of incidence. For the two incidence angles measured 0 and 40\ifmmode^\circ\else\textdegree\fi{}, the energy threshold was the same, approximately 2 keV. From this threshold there…
Giant Oscillations in the Magnetoacoustic Attenuation of Bismuth
Measurements of the magnetoacoustic attenuation of bismuth at temperatures of 1.4-1.8\ifmmode^\circ\else\textdegree\fi{}K in transverse magnetic fields up to 17 kG are reported. For shear waves of frequency 8-40 Mc/sec, propagated in the bisectrix direction, with the magnetic field in the binary direction, oscillation…
Spectroscopy of MnO43−in Calcium Halophosphates
A study has been made of the optical absorption and fluorescence of the compounds ${\mathrm{Ca}}_{2}$P${\mathrm{O}}_{4}$Cl (spodiosite) and ${\mathrm{Ca}}_{5}$${(\mathrm{P}{\mathrm{O}}_{4})}_{3}$Cl (apatite) doped with ${\mathrm{Mn}}^{5+}$. The ${\mathrm{Mn}}^{5+}$ ion has the electronic configuration $3{d}^{2}$ and i…
Internal Field in General Dipole Lattices
The calculation of the internal field in dipole lattices necessitates summing the contributions due to all dipoles in the crystal. These dipole sums are conditionally convergent, which means that they depend on the order of summation (i.e., the shape of the crystal). Rapidly converging expressions for these sums are o…
Spin-Wave Analysis of the Sublattice Magnetization Behavior of Antiferromagnetic and Ferromagnetic CrCl3
The temperature and magnetic-field dependences of the sublattice magnetization in the hexagonal layertype compound Cr${\mathrm{Cl}}_{3}$ (${T}_{N}=16.8\ifmmode^\circ\else\textdegree\fi{}$K) have been deduced from the $^{53}\mathrm{Cr}$ nuclear magnetic resonance (NMR) for $0.4\ensuremath{\le}T\ensuremath{\le}8.1\ifmmo…
An Introductory to Metallic Corrosion
Abstract not Available.
Transitional phenomena in α‐polyolefin melts
Abstract A first order transition was observed in the temperature range of about 210°C by dilatometric studies on both isotactic and atactic polypropylene and for isotactic poly (butene‐1) and poly (pentene‐1). No such transition was observed for polyethylene. It was found that the transition is not due to the measure…
Studies on Atmospheric Corrosion of Steels Related with Meteorological Factors in Japan (2nd Report)
The atmospheric corrosion rates of steel were measured in an industrial district (Kôtô-ku) of Tokyo, Japan.Analyzing correlations between the corrosion rates and meteorological factors and/or atmospheric pollution substance factors by means of statistical analysis method, a corrosion regression was obtained to describ…
Method of Estimating Creep and Shrinkage Strains in Concrete from Properties of Constituent Materials
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Diffusion-Controlled Attack of Glass Surfaces by Molten Hydroxides
The attack of soda‐lime‐silica, alkali borosilicate, zirconia‐silica and alumina‐silica glasses by sodium hydroxide and potassium hydroxide melts at temperatures just above their melting points has been studied. Sodium hydroxide attack resulted in a frosty layer bound to the surface; potassium hydroxide left a clear s…