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  • 1
    Electronic Resource
    Electronic Resource
    Structural evolution of W nano clusters with increasing cluster size (1999)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 111 (1999), S. 7402-7404 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We have recorded the x-ray diffraction (XRD) patterns of nanometer-size W metal clusters prepared at different average cluster sizes. Nanometer-size W metal clusters were produced through a collision induced clustering mechanism of W metal atoms generated by decomposing W(CO)6 vapors. The XRD patterns clearly showed that structure changed from amorphous→face- centered-cubic (fcc)→body-centered-cubic (bcc) with increasing average cluster size. This implies that W metal clusters do not simply approach the bulk bcc structure but pass through an intermediate fcc structure before they reach the bulk structure, as predicted by Tománek, Mukherjee, and Bennemann [Phys. Rev. B 28, 665 (1983)]. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.480063
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Legendre polynomial expansion method for evaluating multipole moments of current density in toroidal devices (2000)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 7 (2000), S. 1487-1493 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: It is found that multipole moments of toroidal current are given by the coefficients of the Legendre polynomial expansion of the magnetic field on a meridian contour. Using this fact and the orthogonality of the Legendre polynomials, a method is proposed for evaluating the moments from magnetic field measurements through an open-contour. As an application, exact expressions of the first few order moments and the current center position are formulated. Results show that this method is applicable to any aspect ratio tokamaks without the limitation of small displacement of the current center. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.873968
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    A design of a nanometer size metal particle generator: Thermal decomposition of metal carbonyls (1999)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 70 (1999), S. 4366-4369 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We have developed a method which can produce both pure and alloy nanometer size metal particles in a large scale. This method combines a thermal decomposition of metal carbonyls with a collision induced clustering. Metal carbonyls are thermally decomposed with a hot filament and resultant bare metal atoms undergo collisions to produce nanometer size metal particles. This method requires a very simple experimental setup even though it is a high efficiency production method. Using this method, we have produced, high purity Fe, Mo, and alloy Fe/Mo nanometer size metal particles. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1150081
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    Paper (German National Licenses)
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