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Photoion yield spectra of C 60 in the gas phase were measured from 23 to 180 eV by synchrotron radiation. Two peaks at 26 and 34 eV and a flat area ranging 40-50 eV are newly observed in the high-energy side of the giant resonance at ~20 eV. These features are assigned to the shape resonance on photoionization of the valence electrons of C 60 ; the ionized electron is temporarily...
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