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. 2015 Aug 13;6:7909. doi: 10.1038/ncomms8909

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(a) Experimental time-dependent di-cationic (A²⁺, orange) and cationic (A⁺, grey) signals measured in XUV pump-IR probe experiments on anthracene (see Supplementary Note 2 for details about curve fitting). (b) Time-dependent di-cation signals measured for four PAH molecules: naphthalene (blue), anthracene (orange), pyrene (red) and tetracene (black).