Ion-ion coincidence studies on multiple ionizations of $\mathrm{N_2}$ and $\mathrm{O_2}$ molecules irradiated by extreme ultraviolet free-electron laser pulses
- Yamada, A.
- Fukuzawa, H.
- Nagaya, K.
- Sugishima, A.
- Murakami, H.
- Yao, M.
- Rudenko, A.
- Kühnel, K. U.
- Ullrich, J.
- Feifel, R.
- Czasch, A.
- Dörner, R.
- Motomura, K.
- Nagasono, M.
- Higashiya, A.
- Yabashi, M.
- Ishikawa, T.
- Ohashi, H.
- Kimura, H.
- Togashi, T.
- Liu, X.-J.
- Foucar, L.
- Kurka, M.
- Okunishi, M.
- Ueda, K.
- Saito, N.
- Iwayama, H.
DOIAbstract
We have investigated multiple ionization of N$\mathrm{_2}$ and O$\mathrm{_2}$ molecules by 52 nm extreme-ultraviolet light pulses at the free-electron laser facility SCSS in Japan. Coulomb break-up of parent ions with charge states up to 5+ is found by the ion-ion coincidence technique. The charge-state dependence of kinetic energy release distributions suggests that the electrons are emitted sequentially in competition with the elongation of the bond length
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