Charge transfer in dissociating iodomethane and fluoromethane molecules ionized by intense femtosecond X-ray pulses
oleh: Rebecca Boll, Benjamin Erk, Ryan Coffee, Sebastian Trippel, Thomas Kierspel, Cédric Bomme, John D. Bozek, Mitchell Burkett, Sebastian Carron, Ken R. Ferguson, Lutz Foucar, Jochen Küpper, Tatiana Marchenko, Catalin Miron, Minna Patanen, Timur Osipov, Sebastian Schorb, Marc Simon, Michelle Swiggers, Simone Techert, Kiyoshi Ueda, Christoph Bostedt, Daniel Rolles, Artem Rudenko
| Format: | Article |
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| Diterbitkan: | AIP Publishing LLC and ACA 2016-07-01 |
Deskripsi
Ultrafast electron transfer in dissociating iodomethane and fluoromethane molecules was studied at the Linac Coherent Light Source free-electron laser using an ultraviolet-pump, X-ray-probe scheme. The results for both molecules are discussed with respect to the nature of their UV excitation and different chemical properties. Signatures of long-distance intramolecular charge transfer are observed for both species, and a quantitative analysis of its distance dependence in iodomethane is carried out for charge states up to I21+. The reconstructed critical distances for electron transfer are in good agreement with a classical over-the-barrier model and with an earlier experiment employing a near-infrared pump pulse.