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  • 1
    Electronic Resource
    Electronic Resource
    A highly efficient neutron time-of-flight detector for inertial confinement fusion experiments : Proceedings of the 12th topical conference on high temperature plasma diagnostics (1999)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 70 (1999), S. 1221-1224 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We have developed the highly efficient neutron detector system MANDALA for the inertial-confinement-fusion experiment. The MANDALA system consists of 842 elements plastic scintillation detectors and data acquisition electronics. The detection level is the yield of 1.2×105 for 2.5 MeV and 1×105 for 14.1 MeV neutrons (with 100 detected hits). We have calibrated the intrinsic detection efficiencies of the detector elements using a neutron generator facility. Timing calibration and integrity test of the system were also carried out with a 60Co γ ray source. MANDALA system was applied to the implosion experiments at the GEKKO XII laser facility. The integrity test was carried out by implosion experiments. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1149430
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  • 2
    Electronic Resource
    Electronic Resource
    Analysis of creep of wood during water adsorption based on the excitation response theory (1999)
    Springer
    Journal of wood science 45 (1999), S. 19-23 
    Details
    ISSN: 1611-4663
    Keywords: Creep ; Water adsorption ; Excitation-response theory ; Boltzmann superposition principle ; Mechanosorptive
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The creep behavior of wood during water adsorption was mathematically analyzed based on the excitation response theory. The creep changeϕ u (t), obtained by subtracting an instantaneous complianceJ u (0) from a creep complianceJ u (t), was linear in terms of moisture content at a steady state of moisture and was separable into two functions of time and moisture content. The creep compliance, however, was nonlinear. The creep change during water adsorption was obtained by applying the excitation-response theory to the creep change in a steady state of moisture. The equation was formally equal to the results reported so far. By using the derived equations, it was theoretically proved that the change in creep compliance during water adsorption from moisture contentu 0 tou 1 is always greater than the difference between creep compliance atu 0 and that at u, in the steady state.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00579519
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  • 3
    Electronic Resource
    Electronic Resource
    Ferromagnetism and paramagnetism in potassium clusters incorporated in zeolite LTA (1999)
    Springer
    The European physical journal 9 (1999), S. 505-508 
    Details
    ISSN: 1434-6079
    Keywords: PACS: 36.40.Cg Electronic and magnetic properties of clusters – 71.24.+q Electronic structure of clusters and nanoparticles – 75.50.Dd Nonmetallic ferromagnetic materials
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. Magnetic and optical properties are investigated for potassium clusters incorporated in zeolite LTA at loading densities of K atoms between 3.5 and 7.2 per cluster, the latter of which is saturated. The Curie–Weiss law with negative Weiss temperature -35 K is seen at 3.5 atoms per cluster, and gradually approaches the Curie law as the loading density increases up to 7.2 atoms per cluster. The Curie temperature, ∼8 K at 3.5 atoms per cluster, approaches 0 K at 7.2 atoms per cluster. These results suggest that the antiferromagnetic coupling between localized magnetic moments of K clusters decreases with increasing K-loading density, and almost disappears at the K-loading density of 7.2 atoms per cluster. The insulator-like absorption tail is observed in the infrared region at any loading density, indicating that K clusters in LTA are in the Mott insulator phase. The average magnetic moment estimated from the saturation magnetization remarkably increases from 0.25 to 0.75 μB per cluster as loading density increases from 3.5 to 7.2 atoms per cluster. On the contrary, the average magnetic moment estimated from the Curie constant is ∼1.6 μB per cluster, and almost independent of the loading density. The explanation of these magnetic properties by the model of ferrimagnetism proposed in a previous paper proves difficult.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100530050488
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