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  • Articles  (5)
  • Articles: DFG German National Licenses  (5)
  • 61.70  (5)
  • 1985-1989  (5)
  • 1950-1954
  • 1987  (5)
  • Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics  (5)
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  • Articles  (5)
Source
  • Articles: DFG German National Licenses  (5)
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Publisher
Years
  • 1985-1989  (5)
  • 1950-1954
Year
Topic
  • Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics  (5)
  • Physics  (5)
  • 1
    Electronic Resource
    Electronic Resource
    A high-intensity58Co slow-positron beam and applications to probe near-surface disorder (1987)
    Springer
    Applied physics 43 (1987), S. 269-274 
    Details
    ISSN: 1432-0630
    Keywords: 78.70 ; 61.70 ; 07.77
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Properties and performance of a magnetically-guided, high-intensity, ultra-high-vacuum slow-positron beam are reviewed. Basic positron behaviour in solids is briefly described. Results from various58Coβ + sources in conjunction with a backscattering W(110) moderator are presented. We discuss research applications to probe depth distribution of open-volume lattice defects. Two experimental methods capable of yielding information on defects within ∼500 Å and ∼1 μm from the surface, respectively, are considered. Results are shown on defect distribution in ion implanted metals and semiconductors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00635182
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Ion-beam mixing of multilayered targets ballistic effects (1987)
    Springer
    Applied physics 42 (1987), S. 193-196 
    Details
    ISSN: 1432-0630
    Keywords: 61.70 ; 66.30
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract In this work a Monte-Carlo method of dynamical type is used to simulate the ion-beam mixing of a composite, multilayered target. The calculation refers to a Ni-Ta structure, on a silicon substrate, bombarded with As+ ions and elucidates the effect of the dose and of the target structure on the intermixing of the target constituents.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00620598
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  • 3
    Electronic Resource
    Electronic Resource
    Photopyroelectric spectroscopy (P2ES) of electronic defect centers in crystalline n-CdS (1987)
    Springer
    Applied physics 44 (1987), S. 123-130 
    Details
    ISSN: 1432-0630
    Keywords: 72.20 ; 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 Photopyroelectric spectroscopy (P2ES) of n-CdS single crystals was performed at an open circuit, and in conjunction with photocurrent spectroscopy (PCS) in the presence of an applied ac or dc transverse field. The results showed that P2ES is very sensitive to the presence of deliberately introduced subbandgap defect structures, with the P2E signal dominated by non-radiative de-excitation mechanisms at defect centers. The potential of this technique as a powerful electronic defect diagnostic tool, combined with the overall experimental simplicity, was demonstrated with mm-thick crystals used as received in an open-cell geometry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00626412
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  • 4
    Electronic Resource
    Electronic Resource
    EL2 deep level in sub-bandgap surface photovoltage spectra in GaAs bulk crystals (1987)
    Springer
    Applied physics 43 (1987), S. 117-121 
    Details
    ISSN: 1432-0630
    Keywords: 61.70 ; 73.40
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Experimentally observed surface-photovoltage-method (SPV) spectra in the subbandgap energy range are presented for a real (100)GaAs surface, treated with preepitaxial procedures. Conductive, n-type GaAs and semi-insulating GaAs are studied. It is shown that SPV spectra are formed as a result of the simultaneous action of both surface states and deep bulk levels. The spectral shape of the surface-state photoionization cross-section is qualitatively determined. The influence of the deep bulk levels on the SPV spectra is explained, and the photoionization cross-section for both Cr and EL2 levels is qualitatively determined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00617963
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  • 5
    Electronic Resource
    Electronic Resource
    The positron beam at the stuttgart pelletron accelerator and its applications toβ +γ positron lifetime measurements (1987)
    Springer
    Applied physics 43 (1987), S. 261-267 
    Details
    ISSN: 1432-0630
    Keywords: 78.70 ; 61.70 ; 07.77
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract A slow-positron source has been installed in the therminal of an electrostatic 6.5 MeV accelerator and provides a monoenergetic positron beam in the few-MeV range. It will be used to operate a “fast” positron lifetime spectrometer based onβ + γ coincidences. The properties of the beam, the expected performance of the spectrometer, its advantages over conventionalγγ lifetime measurements, a number of intended applications, as well as recent positron-electron scattering experiments and plans for positron channelling and channelling-radiation studies are outlined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00635181
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