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  • 1995-1999  (2)
  • 1985-1989  (3)
  • 1950-1954  (1)
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  • 1995-1999  (2)
  • 1985-1989  (3)
  • 1950-1954  (1)
  • 1990-1994  (1)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Deposition and hydrogen content of carbon films grown by CH+3 ion-beam bombardment (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 78 (1995), S. 5366-5372 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Carbon deposition and hydrogen codeposition is investigated as a function of ion energy, fluence, and target temperature at normal incidence by bombardment of silicon and pyrolitic graphite substrates with mass selected CH+3 molecules. An amorphous hydrogenated carbon layer (a-C:H) is formed in a thickness range of 40–130 nm at a fluence of 3×1018/cm2. The deposition process, the re-erosion phenomenon, the hydrogen content, and the H/C ratios of the carbon films are studied between 300 and 1000 K in the ion energy range from 150 eV to 3 keV. The experimental results are compared with those of TRIDYN computer simulations and previous experimental results of carbon sputtering by atomic H+ and C+ beams in order to obtain a better understanding of the interaction between hydrocarbon ions and the carbon-based wall materials in fusion devices. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.359717
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Characterization of the temperature dependent phase transition of evaporated Ti films on diamond: Phase identification using maximum entropy data analysis (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 82 (1997), S. 3314-3320 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The carbidization of thin Ti films on natural diamond has been investigated in the temperature range between room temperature and 700 °C using x-ray-photoelectron-spectroscopy. It is possible to separate chemical phases in Ti 2p3/2 electron peaks after deconvolution of the spectrometer's broadening function. We employ Bayesian information, using maximum entropy prior information. The apparatus function is derived from measured spectra of the Fermi edge of a silver sample. Data analysis of reconstructed Ti 2p3/2 core level spectra shows that, with increasing temperature, Ti films are transformed from metallic Ti to a mixed phase consisting of metallic Ti and TiC0.56. No carbidic phase is found with a ratio of carbidic C to Ti smaller than 0.56. The metallic layer is fully transformed to TiC0.56 at 430 °C. At higher temperatures, the concentration ratio of carbidic C to Ti depends nearly linearly on temperature. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.365640
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Acceptor-defect complexes in GaAs studied by perturbed angular correlation spectroscopy (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 55 (1989), S. 2301-2303 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Acceptor-defect and acceptor-impurity complexes in GaAs have been studied by perturbed angular correlation spectroscopy. In n-type GaAs close Cd-S pairs were formed; the temperature dependence of the related electric field gradient indicates an electrically inactive Cd-S complex. After a hydrogen plasma exposure of GaAs a distinct Cd-defect complex has been observed. Similarly, plasma-induced configurations were also formed in InP and GaP.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.102044
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  • 4
    Electronic Resource
    Electronic Resource
    Grain size dependence of the electric field gradient (1987)
    Springer
    Hyperfine interactions 34 (1987), S. 243-246 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Precise measurements of the electric field gradient (EFG) with the perturbed angular correlation method (PAC) in Cd and Zn show significant differences between single-crystalline and poly-crystalline samples. These differences (up to four percent at low temperatures) decrease with increasing temperature and vanish at about 2 60 K. In all samples the lowest EFG values are obtained for single crystals. In poly-crystalline samples the EFG as well as the width of the EFG distribution increase with decreasing grain size. This effect is also observed in semiconducting ZnO.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02072713
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  • 5
    Electronic Resource
    Electronic Resource
    PAC measurements in titanium and titanium-hydrogen alloys (1987)
    Springer
    Hyperfine interactions 35 (1987), S. 765-768 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Measurements have been performed with the PAC method in pure hcp titanium and highly concentrated titanium hydrogen alloys to investigate the temperature dependence of the electric field gradient (EFG) in both systems. In pure titanium it can be explained by a recent theoretical model; in the titanium hydride the EFG reveals a strong decrease with temperature, which indicates enhanced local vibration amplitudes. Furthermore the interaction of hydrogen and oxygen impurities with the111In probe atoms have been studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02394490
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  • 6
    Electronic Resource
    Electronic Resource
    Säulenchromatographie (1954)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 143 (1954), S. 286-287 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00435335
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    Paper (German National Licenses)
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