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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 67 (1980), S. 606-607 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 22 (1980), S. 185-187 
    ISSN: 1432-0630
    Keywords: 06 ; 07 ; 61.70
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract New methods for thermal-equilibrium investigations of atomic vacancies or of dislocation movements in metals require measurements of minute resistance fluctuations. The accuracy of such measurements is limited by thermal noise from the resistor. The present paper proposes a method for analysing resistance fluctuations independent of voltage noise.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 30 (1983), S. 117-122 
    ISSN: 1432-0630
    Keywords: 61.70 ; 72.70
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Fluctuations in the number of vacancies in metals in thermal equilibrium lead to resistivity fluctuations. Analysis of these fluctuations permits measurement of both formation and migration enthalpy of the vacancies. The power spectrum of the fluctuations is calculated using a series of statistically independent pulses. It can be derived from the diffusion equation for any geometry of the vacancy sinks. Vacancy diffusion to the surface of a thin plate or of a sphere are treated as examples. The measurability of vacancy noise is assessed. It should also be possible to measure vacancy noise during irradiation. It is predicted that correlated vacancy creation, which may occur during irradiation, will cause an increase in the power spectrum.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 304 (1980), S. 262 
    ISSN: 1618-2650
    Keywords: Natrium-Cluster ; Strukturbest. bis Na8 ; Pseudopotentialrechnung
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 19 (1981), S. 113-130 
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Semilocal pseudopotentials have been determined for first-row (Li to Ne), second row (Na to Ar), and third-row atoms (K, Ca). Core-valence correlation is included by adjusting the pseudopotentials to experimental energies of ions with a single valence electron. Correlation within the valence shell is taken into account by using the spin-density functional formalism. The approximations involved in this approach are tested for atomic ionization energies as well as binding energies of monohydrides and alkali diatomics, agreement with experiment is usually satisfactory, but in certain applications density functionals should be already included in the fitting of the local part of the pseudopotential. In addition, 3s/3p and 3s/2p basis sets (for first and second row, respectively), designed for use in connection with our pseudopotentials, are given; it is shown that they yield reasonable results for both SCF and correlation energies.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 480 (1981), S. 193-198 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: New Results on Fluorescence Properties of Sesqui-, Bis- and Tris(triphenylphosphane) Copper(I) HalidesThe solid state fluorescence and excitation spectra of sequi-, bis- and tris(triphenylphosphane) copper(I) halides  -  (CuHal)2(PΦ3)3; CuHal(PΦ3)2; CuHal(PΦ3)3  -  at 300 K and 77 K are now completely registrated. The fluorescence is almost independent of the halide anion, whereas excitation is influenced. Furthermore, solvate molecules do not change the fluorescence. Dimeric sesqui compounds show a red shift of emission when cooled, but monomeric bis and tris complexes undergo a blue shift of emission by cooLing.
    Notes: Die Fluoreszenz- und Anregungsspektren der Sesqui-, Bis- und Tris(triphenylphosphan)kupfer(I)-Halogenide  -  (CuHal)2(PΦ3)3; CuHal(PΦ3)2; CuHal(PΦ3)3  -  im festen Zustand bei 300 K und 77 K liegen jetzt vollständig vor. Die Fluoreszenz ist nahezu unabhängig vom Halogenidion, wohingegen die Anregung beeinflußt wird. Weiterhin führen Solvatmoleküle zu keiner Fluoreszenzänderung. Beim Abkühlen von dimeren Sesqui-Verbindungen wird deren Emission nach rot verschoben, während die Emissionen monomerer Bis- und Tris-Verbindungen beim Abkühlen einer Blauverschiebung unterliegen.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 480 (1981), S. 199-204 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Effect of Substituents and Anions on the Fluorescence Properties of Mixed-Ligand (Amine-triphenylphosphane) Copper(I) HalidesMixed-ligand complexes analyzing CuHal · PΦ3 · Py—R where Hal = Cl-, Br-, I- and where R are various substituents at the pyridine (Py) exhibit an intense solid state fluorescence depending on substituent and anion when excited with uv radiation (365 nm). It will be shown that there is a relation between fluorescence and mesomeric and inductive properties of substituents and anions.
    Notes: Gemischtligandige Komplexe der Zusammensetzung CuHal · PΦ3 · Py—R mit Hal = Cl-, Br-, I- und R = verschiedenen Substituenten am Pyridin (Py) weisen bei UV-Bestrahlung (365 nm) im festen Zustand eine intensive Fluoreszenz auf. Es soll gezeigt werden, daß ein Zusammenhang der Fluoreszenz mit den mesomeren und induktiven Eigenschaften von Substituenten und Anionen besteht.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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