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机译:
Iowa State Univ, Ames Lab, USDOE, Ames, IA 50011 USA;
Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA;
Univ Pavia, Dipartimento Fis A Volta, I-27100 Pavia, ItalyUniv Pavia, Unita CNISM, I-27100 Pavia, ItalyUniv Patras, Dept Chem, Patras 26500, Greece;