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Positron lifetimes for neutron-irradiated C60
Authors:F. Bečvář  I. Novotný  I. Procházka  D. Rafaja  J. Kern
Affiliation:(1) Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, CZ-121 16 Prague 2, Czech Republic;(2) Physics Department, University, Pérolles, CH-1700 Fribourg, Switzerland
Abstract:The neutron-irradiation effects on C60 fullerite powder were studied by positron lifetime spectroscopy. Below 0.5 ns, a single lifetime of 382±1 ps was found for the unirradiated annealed sample and two components were resolved after neutron irradiation with a dose of 2×1016 n/cm2. Possible origins of these components are briefly discussed.Paper presented at the 132nd WE-Heraeus-Seminar on ldquoPositron Studies of Semiconductor Defectsrdquo, Halle, Germany, 29 August to 2 September 1994
Keywords:61.80  78.70
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