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  • 1990-1994  (3)
  • 1985-1989  (1)
  • 21.10.Re  (2)
  • 72.80.Ey  (1)
  • 81.60  (1)
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Material
Years
  • 1990-1994  (3)
  • 1985-1989  (1)
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Reaction cross section measurements of the neutron-rich isotopes8,9,11Li at 80 MeV/nucleon (1991)
    Springer
    The European physical journal 340 (1991), S. 41-50 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.−k ; 27.20.+n ; 25.70.Np ; 21.10.Re
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Total interaction cross sections have been measured for8Li on C and Pb targets, for9Li on C, Al, Cu, Sn and Pb targets as well as for11Li on C, Sn and Pb targets. For each beam, we also used a plastic scintillator as target. The measurements with the scintillator targets are used to extract reduced nuclear radii of the lithium isotopes. These radii are then used for the calculation of the nuclear part of the total cross section for the other targets. The total electromagnetic-dissociation (EMD) cross sections have been deduced and are compared to different models. A strong target-charge-dependent EMD cross section is measured for11Li reaching 2.96 −0.82 +0.84 b for the Pb target. In the9Li case, a large EMD cross section for high-Z targets has been observed which amounts to 0.75 ± 0.45 b for the Pb target. The EMD cross sections of both,9Li and11Li, may be understood by the giantdipole-resonance model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01284479
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Surface chemistry of Zn3P3 single crystals studied by XPS (1987)
    Springer
    Applied physics 43 (1987), S. 197-201 
    Details
    ISSN: 1432-0649
    Keywords: 81.60 ; 82.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract X-ray photoemission spectroscopy (XPS) has been used to study the surface reaction of Zn3P2 single crystals. The spectra of crystals exposed to H2, O2, CO2, O2+H2O or CO2+H2O during a four week period were compared to the spectra of as-grown or in UHV scraped samples. For samples contaminated with the wet gases O2+H2O and CO2+H2O additional phosphorus core levels together with a shift of the zinc core levels were observed. For crystals exposed to atmosphere during several months no phosphorus could be detected on the gasgrown surface, whereas the stochiometry of Zn3P2 was maintained within the bulk. Crystals with scraped surfaces showed no moisture sensitivity. No surface contamination was also detected for Zn3P2 crystals deposited with up to 1000 L H2O or exposed to atmosphere during 30 min.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00695623
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Influence of growth conditions on the structural, optical, and electrical properties of ZnSe films (1992)
    Springer
    Applied physics 54 (1992), S. 455-459 
    Details
    ISSN: 1432-0630
    Keywords: 61.10.-i ; 78.55.-m ; 72.80.Ey
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract ZnSe films were grown by chemical vapour deposition on GaAs substrates. The influence of the source temperature (between 820 and 900° C) and the substrate temperature (between 620 and 790° C) on the film properties were investigated by Hall measurements, X-ray diffraction, and photoluminescence. With respect to blue luminescent devices the ratio of excitonic to deep level transitions was found to be optimum at low growth rates when the source temperatures were kept below 840° C. P-type conduction up to a net carrier concentration of 8×1018 cm−3 could be obtained by substrate temperatures above 700° C. Lattice contraction versus substrate temperature pointed to a reduced incorporation of donors at higher growth temperatures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00324171
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Charge-changing cross sections of the neutron-rich isotopes8,9,11Li (1992)
    Springer
    The European physical journal 343 (1992), S. 375-379 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.−k ; 27.20.+n ; 25.70.Np ; 21.10.Re
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Total charge-changing cross sections have been measured for8Li on C and Pb targets, for9Li on C, Al, Cu, Sn and Pb targets, as well as for11Li on C, Sn and Pb targets at about 80 MeV/nucleon. These data are compared to measured total reaction cross sections and Glauber-type calculations using Hartree-Fock density distributions. These comparisons allow to draw conclusions on the proton density distribution of the neutronrich lithium isotopes. The results show that even for the most exotic nucleus11Li the proton distribution is only very weakly influenced by the long tail in the neutron density distribution already established in several experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01289813
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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