Details

Autor(en) / Beteiligte

• Gope, Krishnendu
• Bittner, Dror M
• Strasser, Daniel

Titel

Sequential mechanism in H 3 + formation dynamics on the ethanol dication

Ist Teil von

• Physical chemistry chemical physics : PCCP, 2023-03, Vol.25 (9), p.6979-6986

Ort / Verlag

England

Erscheinungsjahr

2023

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Two- and three-body Coulomb explosion dynamics of isolated ethanol dications are studied single-photon double-ionization with ultrafast extreme-ultraviolet pulses. The measured 3-body momentum correlations obtained 3D coincidence imaging of the ionic products provide evidence for several concerted and sequential mechanisms: (1) a concerted 3-body breakup mechanism, with dominating channels such as CH + COH + H ; (2) sequential dissociation in which the ejection of a low-kinetic-energy neutral OH precedes the Coulomb explosion of C H → CH + CH ; and (3) a sequential 3-body breakup mechanism that dominates H formation from the ethanol dication a mechanism that is different from the well-studied H formation in the 2-body Coulomb explosion of the methanol dication. Furthermore, we report surprising branching ratios of the competing C-O bond dissociation channels, resulting in H O , H O and OH formation.