RSS 1.0ARTÍCULOS
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A study of neutron damage in be-doped copper
(Taylor & Francis, 1970)The experiments of Mclntyre (1957) on the nature of the defects induced by fast neutrons in copper have been repeated, and confirm his result. It is shown that the addition of a small amount of beryllium to the copper does ... -
Un método para la medición de energía de laser pulsado en amplia gama de frecuencias.
(1970)Se puntualizan las características de los materiales ferroeléctricos como medidores de energía de radiaciones láser. Se dan detalles de la fabricación y del ensayo de detectores de titanato de bario, y se propone un ... -
Anodic behaviour of mild steel During yielding in nitrate solutions.
(Pergamos Press, 1970)The anodic behaviour of mild Steel during yielding, at constant potential in various hot nitrate solutions, has been studied. The influence of solution composition, pH, strain rate and electrode potential, has been examined. ... -
Estudio de las dimensiones de una cavidad elíptica de láser de cristal para máximo rendimiento.
(1970)Se propone un método fotoquímico para el estudio de la transparencia de energía desde el generador de luz al cristal, en una cavidad láser. Los primeros resultados muestran que las fórmulas teóricas propuestas por otros ... -
Second and fourth order spin-lattice coefficients for Gd 3+ in theoria.
(American Chemical Society, 1970)In this work we tried successfully to measure the fourth order coefficients of H' for Gd3+ in ThO2. This system was chosen because its small EPR linewidths (about 1 gauss) allows precise measurements of the lineshifts. We ... -
Anomalous behavior of Hc3/Hc2 near Tc for Sn-In and In-Bi alloys systems.
(Departament of Physics of Brown University., 1970)Previously reported measurements of the ratio Hci/Hci for ttn-rich Sn-In alloys and indium-rich In-Bi alloys have been extended in further detail, and include variations in foil thickness (6 — 300 /i)- The anomalous behavior ... -
Non-markovian irreversible behavior in a simple model.
(American Chemical Society, 1970)The soluble model of an oscillator coupled to a scalar field is used as an example of irreversible behavior. By studying the reduced density operator for the oscillator, a generalized Fokker-Planek-Kramers-Chandrasekhar ... -
Determinación de estructuras cristalinas mediante análisis vibracional. Aplicación a etilenos clorados.
(1970)Se analiza la correlación entre la simetría de moléculas aisladas y la simetría de cristales. En la aplicación a los dicloroetilenos cis y trans se han determinado los espectros de infrarrojo y Raman en la región 33-4000 ... -
On the evidence for electron-electron scattering in the electrical resistivity In.
(1970)The purpose of this paper is to report that a generalized Kohler’s rule, similar to that proposed by Jones and Sondheimer, holds for the magnetoresistance of very pure Indium. This provides a reliable method for extrapolating ... -
Temperature dependence of the magnetic phase transitions of CoCIZ 2H 2O
(American Chemical Society's, 1971)The H -T phase diagram for the antiferromagnetic Co Cl2-2H20 has been measured. The two meta-magnetic transitions are observed to meet at a triple point at 8.8 K and 38.5 kg. A molecular field calculation is in good agreement ... -
Superconductores cerámicos de alta temperatura crítica
(1987)El descubrimiento de materiales cerámicos superconductores a temperatura por encima de la ebullición de nitrógeno líquido ha producido una revolución científica que promete convertirse en tecnología a breve plazo. En el ... -
Self-interstitial in hexagonal close-packed metals
(1982)Different symmetry configurations for an interstitial in a hexagonal close packed lattice are studied. Their stabilities are discussed and calculations are performed by means of an interatomic potential which reproduces ... -
Valencia intermedia. Un banco de pruebas para la ciencia de materiales
(Academia Nacional de Ciencias Exactas, Físicas y Naturales, 1986)El propósito de esta Conferencia es m ostrar como el estudio de los materiales llamados de Valencia Intermedia puede contribuir al conocimiento general de la ciencia de materiales. Conviene aclarar que cuando nos referimos ... -
A regularization method for Fourier series of discontinuous functions
(1982)A regularization procedure, based on the punctual Padé approximants, is used to treat Fourier series of discontinuous functions. The arising difficulties for such series are easily overcome by this method. Probably the sam ... -
A renormalisation group technique for spin and gauge systems with topological excitations
(American Physics Society, 1982)We present a real space renormalisation group technique able to deal explicitly with gases of topological excitations. As examples we consider the two-dimensional X Y model and the three-dimensional compact electrodynamics. -
Model relating superconductive penetration depth and metallurgical phase separation in amorphous La70 Cu30
(Pergamon Press, 1982)A model is proposed to account for the large increase in the measured penetration depth of superconducting, amorphous La7oCu3o when the specimens are annealed sufficiently long near, but below, the crystallization temperature. ... -
Thermalization and diffusion of positrons in solids
(American Physics Society, 1982)Trapping of thermalized positrons in solids of temperature T by sinks, such as surfaces, vacancies, or voids, can change the mean kinetic positron energy E + in the medium so that (E+—3kBT/2)<0. The phenomenon of positron ... -
Ion-electron emission: The effect of oxidation
(Elsevier, 1982)We have studied electron emission from Al and Mo surfaces by 4–60 keV Ar+ ions under ultrahigh-vacuum conditions and as a function of oxygen exposure. We found that the dependence of the electron yield γ on oxygen exposure, ... -
Polarisation of electric field quench radiation from He+(2S) ions
(Institute of Physics (IOP) Publishing, 1982)The polarisation fraction of 304 Á photons produced by an 0.1-1 kV cm-1 electric field (Stark) quenching of metastable He+(2S) ions has been measured. A gold reflecting polariser was used to determine the degree of ... -
Ion-induced Auger-electron emission from aluminum
(American Physics Society, 1982)We have observed A1 L2,3 Auger electrons from clean aluminum surfaces bombarded by mass-analyzed beams of noble-gas ions at 45° incidence, and in the energy range 600 eV —15 keV. The electron energy spectra show a wide ...
