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  • PACS: 21.10.Re Collective levels – 21.10.Tg Lifetimes – 23.20.En Angular distribution and correlation measurements – 23.20.Lv Gamma transitions and level energies – 27.70.+q 150 ≤ A ≤ 189  (1)
  • ultrafine SiO2  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Reducible properties of draw temperature, rate of strain and filler content in tensile yield stress of polymethylmethacrylate filled with ultrafine particles (1984)
    Springer
    Rheologica acta 23 (1984), S. 396-400 
    Details
    ISSN: 1435-1528
    Keywords: Yield stress ; ultrafine SiO2 ; master curve ; master-master curve ; critical surface tension
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Abstract The yield stress of polymethylmethacrylate (PMMA) composites filled with ultrafine SiO2 particles was measured as a function of the draw temperature, rate of strain and filler content. The yield stress of the composites increased with increasing filler content and decreasing filler size. The tensile yield stress was found to be reducible with regard to draw temperature, rate of strain and filler content. At a given filler content, a master curve was obtained for the yield stress plotted versus the logarithm of the strain rate. The Arrhenius plot of the shift factors (a T ) used to produce the strain rate-temperature master curve formed a single curve for all sizes and loadings of the filler. The master curves obtained for different loadings of a filler of given size could be further reduced into a master-master curve by shifting them along the axis of strain rate, with the logarithm of the second shift factors (loga c ) proportional to the 4/5th power of the filler volume fraction (V f ). The proportionality constant and the exponent represent the extent of the filler reinforcing effect in the polymer. These values were found to be correlated with the critical surface tension of the polymers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01329191
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  • 2
    Electronic Resource
    Electronic Resource
    Rotational bands in 181Ta (1998)
    Springer
    The European physical journal 3 (1998), S. 197-199 
    Details
    ISSN: 1434-601X
    Keywords: PACS: 21.10.Re Collective levels – 21.10.Tg Lifetimes – 23.20.En Angular distribution and correlation measurements – 23.20.Lv Gamma transitions and level energies – 27.70.+q 150 ≤ A ≤ 189
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: High-spin states in 181Ta have been studied via the 176Yb(11B,α2n) reaction at 52 MeV using the PEX array and at 57 MeV using the NORDBALL array, with α-particle detection. The previously known, Kπ=(7/2)+ ground state band and Kπ=(9/2)− band have been extended to spins (29/2)+ and (31/2)−, respectively. Two new one-quasiparticle bands, the Kπ=(5/2)+ band built on the known (5/2)+ isomer and a Kπ=((1/2)−) band have been observed. Two other rotational bands with three-quasiparticle structure, Kπ=(15/2)− and ((19/2)+ with π(7/2)[404]ν2(1/2)[510](9/2)[624] and π(9/2)[514]ν2(1/2)[510](9/2)[624] configurations, respectively, have been newly observed. The half-life of the Kπ=((19/2)+) bandhead which decays to the head of the (15/2)− band has been measured to be 140(36) ns. However, transitions from the ((19/2)+) state to the (15/2)− band have not been observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100500050166
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    Paper (German National Licenses)
    Fulltext
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