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  • 1
    Electronic Resource
    Electronic Resource
    NONSURGICAL ACQUIRED HEART BLOCK (1964)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 111 (1964), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1964.tb53151.x
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  • 2
    Electronic Resource
    Electronic Resource
    Test of a lead/liquid argon electromagnetic shower detector
    Amsterdam : Elsevier
    Nuclear Instruments and Methods 137 (1976), S. 225-234 
    Details
    ISSN: 0029-554X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0029-554X(76)90333-5
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  • 3
    Electronic Resource
    Electronic Resource
    Coherent scattering theory for the electronic band structure and quantum-state lifetimes in a dilute substitutional Mg alloy (1974)
    Springer
    Journal of low temperature physics 14 (1974), S. 175-194 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The virtual crystal approximation is used to formulate the Schrödinger equation for the electronic band structure of a dilute substitutional alloy and to analyze the effect of coherent scattering on the lifetime τ k of an electron quantum state. Both coherent and incoherent scattering theory yield essentially the same functional and numerical relationship connecting τ k ,C, and |V O|, whereC is the impurity concentration and |V O| is the typical Fourier transform of the impurity perturbation potential. Electron quantum interference data for Mg-Zn and Mg-Cd alloys are interpreted using this formulation. A consistent picture of these alloys results which contains the following features. (1) The impurity atoms in both types of alloys are partially ordered in the Mg lattice. (2) The perturbation potentials for both Zn and Cd are somewhat larger than predicted by simple pseudopotential theories, with the perturbation for Zn being about 6.5 times larger than for Cd. (3) A standing charge density wave commensurate with the lattice and having aC-dependent amplitude is present in these alloys.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00654816
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  • 4
    Electronic Resource
    Electronic Resource
    Interfering electron quantum states in ultrapure magnesium (1974)
    Springer
    Journal of low temperature physics 14 (1974), S. 111-146 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A detailed analysis is presented of the large-amplitude temperature-insensitive oscillations in the transverse magnetoresistivity of ultrapure Mg single crystals resulting from the direct interference of electron quantum states. A calculation of the relative harmonic content of these interference signals based on the transmission characteristics of a magnetic breakdown-generated interferometer is used to quantitatively study certain aspects of the electron states in Mg as well as details of magnetic breakdown. In particular, values of magnetic breakdown parametersH 0are determined without invoking the complexities of transport theory. An absolute lower limit for the electron quantum state lifetime of τ ≳ 0.5 nsec is obtained (forT=1.5° K), although a best fit to the data gives a value an order of magnitude larger, τ∼5 nsec, which corresponds to quantum phase coherence extending over a distance of 3 mm in these crystals. In addition, this work provides direct experimental verification of the π/2 phase difference between transmitted and reflected electron states at a magnetic breakdown junction. Comparison of the results of this experiment with previous work via an existing semiempirical band structure calculation demonstrates the complete consistency of these measurements with previous Fermi surface data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00654814
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  • 5
    Electronic Resource
    Electronic Resource
    Effects of alloying in the dilute limit on the quantum states of electrons in magnesium (1974)
    Springer
    Journal of low temperature physics 14 (1974), S. 147-174 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The electron quantum interference phenomenon was used to determine the effects of substitutional alloying upon the quantum-state lifetime τ and band gapsE g at the Fermi energy in single crystals of pure Mg. Vapor-grown alloys containing either Zn or Cd in concentrationsC∼0.3–15 ppm were studied. The magnetic field dependence of the interference oscillation amplitudes for these samples indicates reductions in τ and significant increases inE g relative to pure Mg (impurity concentration ∼10−8). Within experimental accuracy the observed quantum-state lifetime satisfies the relation τ−1=αC, with α∼2.7×1010 sec−1 per ppm of Cd and α∼2×1011 sec−1 per ppm of Zn. The band gap corresponding to Bragg reflection from the (0001) plane of the hcp structure (which in pure Mg arises solely from spin-orbit coupling) was found to increase by more than a factor of two upon the addition of only ∼10 ppm Cd to Mg. These results are discussed within the framework of the pseudopotential theory of alloying. It is shown that there are discrepancies of more than three orders of magnitude between the experimental and theoretical values forE g and of about one order of magnitude for τ in these dilute-limit alloys.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00654815
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