Materials Literature
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Single crystals of Cu and Al were irradiated with 2.4*10 18 fast neutrons/cm 2 (E>0.1 MeV) at 4.6 K. Asymptotic diffuse scattering of X-rays was measured after irradiation and after several annealing steps up to 300 K. The formation of dislocation loops of interstitial and vacancy type was observed; their size distrib…
Polycrystalline diamond films deposited by the microwave plasma chemical vapor deposition (CVD) technique onto quartz substrates have been irradiated with 100 keV C and 320 keV Xe ions at room temperature and at 200 °C. The dose dependence of the electrical conductivity measured in situ exhibited complicated, nonmonot…
Stable icosahedral ${\mathrm{Al}}_{85\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{Cu}}_{\mathit{x}}$${\mathrm{Ru}}_{15}$ (15x20) alloys of good metals are characterized by conductivities below the ``minimum metallic value,'' and resistivity ratios \ensuremath{\rho}(0.5 K)/\ensuremath{\rho}(295 K) as large as 4. Strong…
A comparative investigation of the influence of crystl lattice type on the character of primary processes, following irradiation with fast neutrons or heavy charged ions with low energies, is carried out with b.c.c., f.c.c., and h.c.p. structures. It is found that in all the cases sub-threshold stage generation of poi…
Penetration of primary electrons into crystals excitation of activator ions by incident radiation motion of mobile carriers in crystals energy conversion of electrons penetrated into phosphor crystals optimization of cathodoluminescence phosphors application of phosphors to picture tube rare earth phosphors II-VI comp…
1 Stereochemical and Physicochemical Properties of Hernes.- 1.1 Introduction.- 1.2 Electronic Structure of Iron.- 1.3 Stereochemistry of Metalloporphyrins.- 1.4 Properties of Ligands.- 1.5 Metal-free and Metal-substituted Cytochrome c.- 2 Spectroscopic Studies of Cytochromes.- 2.1 Introduction.- 2.2 Spectroscopic Meth…
β-KMo 2 P 3 O 13 cristallise dans P2 1 /c avec a=9,701, b=18,848, c=6,389 A, β=106,96°, Z=4; affinement jusqu'a R=0,025. Le reseau est fait de groupements MoO 6 , PO 4 , et P 2 O 7 delimitant des canaux ou reposent les ions K + . La structure est plus symetrique que celles des composes C s ou Rb
A new model of the hydrogen bond network in liquid water is developed. Using the technique of polymer science, the grand canonical partition function of water is expressed by the functional integral of the field variables. The method is applied to anomalies of liquid water. Using the mean-field lattice-gas approximati…
Li 3 B 7 O 12 cristallise dans P1 avec a=6,487, b=7,840, c=8,510 A, α=92,11, β=104,85, γ=99,47 o , Z=2; affinement jusqu'a R=0,061. La structure contient un reseau de mailles unitaires B 3 O 7 , B 3 O 8 et BO 3 avec des cations Li + situes dans les interstices
The empirical response function introduced by Cole and Davidson for the analysis of dielectric relaxation in the frequency domain has been used in an analogous way to reanalyze ionic conductivity relaxation using the electric modulus representation. The fitting of data for ionic relaxation in AgPO3, 0.1AgI-0.9AgPO3, a…
Electronic contributions to the optical properties of small silicon clusters are examined. Geometries and the electronic structures of the clusters are established using the tight-binding model, and linear as well as nonlinear polarizabilities of the clusters are evaluated using one-electron density matrix techniques.…
Transmission spectra of alkali borate glass films of known thickness have been studied as a function of film thickness in the frequency range 50–2000 cm−1, and the composition range 0–70 mol % Na2O. The apparent absorption coefficient of the Na+ ‘‘rattling’’ mode at ≊200 cm−1 becomes almost independent of film thickne…
Oxide layers grown on surfaces of gas-evaporated Si particles as small as 100 Å have been investigated. Results of high-resolution electron microscopy and x-ray photoemission spectroscopy show that the native oxide layer (SiOx) is about 20 Å thick and its chemical composition x is around 1.2. When the particles are an…
Hole mobilities have been measured in tri-p-tolylamine-doped polymers as functions of the polymer composition, temperature, and electric field. Depending on the composition of the polymer, the mobilities vary by over two orders of magnitude. In all cases, the electric field and temperature dependencies can be describe…
The two-dimensional decagonal quasicrystal has been found in many Al-M (M=transitional metal) alloys, very often coexisting with a large-unit-cell phase of similar composition and local structure. By introducing phasons in two orthogonal directions in the quasiperiodic plane perpendicular to the periodic tenfold axis,…
The temperature ( T ) dependence of lattice parameters and the pressure effect on the charge-density wave (CDW) transition temperature T t for V 3 Te 4 with NiAs-like crystal structure are reported. The thermal expansions of lattice parameters a ( T ) and b ( T ) below T t deviate upwards from their linear variation a…
Cristallisation dans P3 - m1 avec a=5,8580, c=7,523 A, Z=1; affinement jusqu'a R=0,030. Une decroissance dans la raideur elastique de la composante C 44 du tenseur pres de 239 K revele une transition de phase a cette temperature. La configuration de la structure de cette zone confirme le caractere ferroelastique de la…
The band structure of cubic ${\mathrm{CsSnBr}}_{3}$ is determined by an empirical pseudopotential method. Independent of the choice of the parameters used in the calculation, cubic ${\mathrm{CsSnBr}}_{3}$ is shown to be a zero-band-gap semiconductor. Based on this result, a new interpretation of the experimental data…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCompositional Mapping with the Electron Probe Microanalyzer: Part IDale E. Newbury, Charles E. Fiori, Ryna B. Marinenko, Robert L. Myklebust, Carol R. Swyt, and David S. BrightCite this: Anal. Chem. 1990, 62, 22, 1159A–1166APublication Date (Print):November 15, 1990Publicati…
We present Raman data for the OD stretch mode of 10 mol % HOD in H2O for the liquid phase from −31.5 to 160 °C. We find that an exact isosbestic does not hold, but rather the crossing of isotherms slowly but uniformly changes with temperature. We present an analysis based on Boltzmann statistics which gives evidence f…