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  • Articles: DFG German National Licenses  (2)
  • 32.70.F  (1)
  • 74.70Y  (1)
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  • Articles: DFG German National Licenses  (2)
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Years
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of low temperature physics 105 (1996), S. 1665-1670 
    ISSN: 1573-7357
    Keywords: 61.80J ; 74.70Y ; 78.70B
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract For YNi2B2C, a typical borocarbide superconductor, we have carried out positron annihilation lifetime measurements, before and after a 40 MeV α-irradiation to a fluence of 2X1016 particles/cm2. A 3-lifetime fit, giving improved variance, showed a third lifetime longer than 1 ns and of low (1 to 2%) intensity. This lifetime is due to positronium formation and o-Ps to p-Ps conversion in the porous samples. The irradiation increases the bulk lifetime. τB, calculated from τ1 and τ2, from 181 ps to 213 ps.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 14 (1989), S. 25-28 
    ISSN: 1434-6079
    Keywords: 32.70.F ; 34.50.H
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract High frequency deflection technique with delayed coincidence single photon counting arrangement has been used to measure the lifetimes of some excited states of argon II. The measurements have been performed under conditions where pressure-dependent effect is negligible. The instrumental response function has been obtained directly and the measured decay curves have been deconvoluted using this response function to yield the lifetimes of the levels concerned.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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