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Nagaya, K. Ueda, L. Giannessi, L. S. Cederbaum, M. Alagia, M. C. Castrovilli, M. Coreno, M. Devetta, M. Mudrich, M. Negro, M. Reduzzi, N. Berrah, N. V. Golubev, O. Plekan, P. Carpeggiani, P. Finetti, Ph. V. Demekhin, P. Johnsson, P. Piseri, S. Di Mitri, S. Mondal, T. Nishiyama, T. Tachibana, T. Takanashi, Y. Kumagai, Y. Ovcharenko","submitted_at":"2019-02-26T12:15:23Z","abstract_excerpt":"The hitherto unexplored two-photon doubly-excited states [Ne$^{*}$($2p^{-1}3s$)]$_{2}$ were experimentally identified using the seeded, fully coherent, intense extreme ultraviolet free-electron laser FERMI. These states undergo ultrafast interatomic Coulombic decay (ICD) which predominantly produces singly-ionized dimers. In order to obtain the rate of ICD, the resulting yield of Ne$_{2}^{+}$ ions was recorded as a function of delay between the XUV pump and UV probe laser pulses. 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