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<正> Polycarbonate foil (Makrofol KG, PC) stacks were irradiated with various swift heavy ions (1.158 GeV 56Fe, 1.755 GeV 136Xe and 2.636 GeV 238U) in a very wide electronic stopping power range (from 1.9 to 17.1 keV/nm) and the fluence range from 1&