Berlin 2001 – wissenschaftliches Programm

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MO: Molekülphysik

MO 8: Posters Thursday: Dissociation and other Collision Processes

MO 8.21: Poster

Donnerstag, 5. April 2001, 12:30–15:00, AT3

Competition between two- and three-body decay of Cl₂O — •Christof Maul, Melanie Roth, and Karl-Heinz Gericke — Technische Universität Braunschweig, Institut für Physikalische und Theoretische Chemie, Hans-Sommer-Str. 10, D-38106 Braunschweig

The photodissociation dynamics of Cl₂O at 235nm and 207nm are investigated. The chlorine atoms generated via dissociation into the radical and three-body decay channel are detected state specifically in a (2+1)-REMPI process. At 235nm the Cl₂O molecule was excited to the 1²B₁ state and the decay is dominated by the radical dissociation Cl₂O+hν→ClO+Cl. At 207nm an excitation into the 2¹A₁ state takes place, which dissociates predominantly into the three-body channel Cl₂O+hν→2Cl+O. The three-body decay is characterized based on the fragment kinetic energy distributions at 235nm and 207nm. The shape of the energy distributions points to an asynchronous concerted decay mechanism.