Publikace ÚTF

Molecular-bond breaking induced by interatomic decay processes

Ying-Chih Chiang, Selma Engin, Peng Bao, Frank Otto, Přemysl Kolorenč, Petra Votavová, Tsveta Miteva, Jiali Gao, and Nicolas Sisourat

Selective bond breaking in a molecule with the use of photons opens the way to control chemical reactions. We demonstrate here that dissociation of a molecule can be efficiently achieved by first photoexciting a neighboring atom or molecule. On the example of the giant He-H-2 dimer, we show that simultaneous ionization and excitation of the helium atom induces H-2 dissociation with a high probability. The excited He+ ion transfers its excess energy via interatomic Coulombic decay (ICD) or electron transfer mediated decay (ETMD) to H-2 which is then singly or doubly ionized, respectively. In both cases, the molecular ion dissociates effectively within a few tens of femtoseconds. Molecular-bond breaking induced by ICD and ETMD are expected to be general phenomena, which provide alternatives to standard photochemistry.
type:article
journal:Phys. Rev. A
volume:100
nr:5
pages:052701
year:2019
grants:Properties of autoionizing states in atoms, molecules and clusters, GAČR 17-10866S; 2017-2019; hlavní řešitel: Přemysl Kolorenč

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