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  • Chemistry  (2)
  • 25.70. Np  (1)
  • 25.70.Jj  (1)
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  • 1
    Digitale Medien
    Digitale Medien
    Intermediate mass fragments in the reaction6Li+46Ti atE/A=26 MeV (1987)
    Springer
    The European physical journal 326 (1987), S. 421-428 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 25.70.Gh ; 25.70.Jj
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Intermediate mass fragment cross-sectionsσ(E, θ, 4≤Z≤11) have been measured in the reaction6Li+46Ti at 156 MeV incident energy. A simple sequential binary decay model describes most of theZ〉8 data as evaporation from the compound nucleus. The complete fusion cross-section is also well reproduced. An intermediate velocity source model (β=2β CN, T=7 MeV) has been used in order to explain the small angle and Z≤8 data which indicate aZ −4.1 dependence.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01289546
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  • 2
    Digitale Medien
    Digitale Medien
    Inclusive measurements of the break-up of 156 MeV6Li-ions at extreme forward angles (1989)
    Springer
    The European physical journal 332 (1989), S. 317-330 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 24.50.+g ; 25.70. Np ; 27.20.+n
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Inclusive alpha particle and deuteron spectra from collisions of 156 MeV6Li-ions with12C and208Pb were measured at extreme forward emission angles including zero degree. The measurements were performed with the Karlsruhe magnetic spectrograph ‘Little John’ and required an efficient reduction of the background from small-angle scattering. The observed double differential cross sections and angular distributions have been analysed on the basis of Serber's spectator break-up model. When going to angles smaller than grazing, where Coulomb effects are expected to be dominating, transitional features may appear. Corresponding effects probably associated with Coulomb break-up are observed with the208Pb-target and require a slight extension of the Serber approach. In the case of the12C-target the break-up cross sections in forward direction seem to reflect the shape of the internal momentum distribution of the alpha particle and deuteron cluster in the6Li-projectile and are in agreement with a 2S-type wave function. However, at larger angles the shape appears to be distorted, possibly by final state interactions.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01295462
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  • 3
    Digitale Medien
    Digitale Medien
    Surface analytical investigations of Al and (Ti, Al) nitrides formed by ion implantation and their corrosion properties (1994)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 22 (1994), S. 431-435 
    Details
    ISSN: 0142-2421
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Physik
    Notizen: Nitrides of Ti, Al and TiAlx alloys were prepared by low energy ion implantation (3 keV N2+). The layer thickness was ∼ 10 nm. The nitride layers were characterized using XPS, UPS and a Kelvin probe. The insulating properties known for bulk AlN were found also for the prepared AlNimpl layers. The work functions for the alloys and the nitrides and their variation with the ion dose were determined. Peak parameters for the XP spectra deconvolution were established. Despite their thinness, the layers showed anodic stability in 0.5 M H2SO4 up to 1.3 V (SHE) for (TiAl)Nimpl and even up to 1.8 V (SHE) for AlNimpl. Above these potentials, the nitrides were oxidized to metal oxides.
    Zusätzliches Material: 7 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/sia.740220192
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  • 4
    Digitale Medien
    Digitale Medien
    Surface characterization and electrochemical behaviour of nitrogen- and carbon-implanted titanium (1992)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 19 (1992), S. 423-429 
    Details
    ISSN: 0142-2421
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Physik
    Notizen: Owing to their combination of metallic and covalent properties, TiN and TiC are used as coating materials. In this work thin layers (layer thickness about 10 nm) of TiN and TiC were prepared by low-energy ion implantation (3 keV N2+, 4 keV C2H4+) into Ti. The change in surface composition as a function of ion dose was followed by XPS. The electrochemical behaviour was studied in an electrochemical cell attached to the surface equipment; therefore no surface oxidation due to air contact took place. TiN and TiC revealed a stability up to 1.5 and 1.0 V respectively. Above these potentials oxidation to TiO2 and N2 in the case of TiN and to TiO2, CO2 and CO in the case of TiC occurred. The gaseous oxidation products were dissolved in the oxide layer and influenced its properties.
    Zusätzliches Material: 10 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/sia.740190179
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