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  • 1
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 68 (1996), S. 2948-2950 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We present low energy ion beam mixing as a tool for the fabrication of composite layers with smooth interfaces. Using this tool we make a stack of alternating layers of Si and MoxSiy. We measure composition and interfacial roughness (σ) and find x/y≈5/3 and σ≈4 A(ring). The method can be applied to reduce absorption losses in x-ray multilayer mirrors for high-resolution dispersive purposes, and to increase thermal stability of multilayers. The thickness of the mixed layers is found to be equal to the ion range. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 80 (1996), S. 2121-2126 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: To increase the x-ray optical contrast of Mo/Si multilayers, we study low energy hydrogen ion implantation of amorphous Si layers. Using elastic recoil detection and Rutherford backscattering spectrometry, we measure the result of hydrogen implantation on Si atomic density. We find a lowering of Si atomic density, and, thus, an enhancement of x-ray optical contrast, as a result of H implantation. We find that the Si atomic density saturates at a minimum of 64±5% of the crystalline value. We have also observed a minor smoothing effect of H+ ion bombardment. Combined with Kr+ ion bombardment, causing a very much larger smoothing of the Si surface, the atomic density is found to saturate at a minimum of 77±5% of the crystalline value. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 63 (1993), S. 3297-3299 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report a significant increase of the reflectivity of a soft x-ray Mo/Si multilayer mirror after low energy hydrogen ion beam bombardment of each of the Si layers after deposition. Cross section transmission electron microscopy pictures indicate no significant qualitative difference in interface roughness between the two samples. Elastic recoil detection and Rutherford backscattering spectrometry reveal a concentration of 22 at. % of H in the ion beam bombarded Si layers and a 12% reduction of the Si atomic density. Calculations using the measured atomic density and a very simple roughness model agree with the measured reflectivities. This is the first report of the modification of atomic density of Si in order to change the x-ray optical constants of the Si layer.
    Type of Medium: Electronic Resource
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