Hannover 2010 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 2: Collisions, Energy Transfer
MO 2.2: Vortrag
Montag, 8. März 2010, 14:15–14:30, F 142
Strong field effects in an ion molecule reaction — •Sebastian Trippel1, Martin Stei1, Rico Otto1, Thorsten Best1, Matthias Weidemüller2, and Roland Wester1 — 1Physikalisches Institut, Universität Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg — 2Physikalisches Institut, Universität Heidelberg, Albert-Überle-Str. 3-5, 69120 Heidelberg
Steric effects are known to play a role in chemical reactions involving non spherical reaction partners. In case of neutral-neutral reactions these effect were investigated by orienting molecules in static electric fields. For ion-molecule reactions the situation is slightly more awkward, since the electric field not only orients the molecules but also changes the trajectory of the ion. In contrast strong light fields, provided by pulsed lasers, could reveal a doorway to overcome this problem due to their capability to align molecules in free space [1]. We accomplish alignment due to the interaction of the fast oscillating electric field of the laser pulse with the induced dipole moment of the molecule. Nano second laser pulses allow to adiabatically transform the molecules into the space fixed state. This talk will present the status of our analysis on the reaction of Cl− with CH3I in strong laser fields up to 2· 1011W/cm2.
H. Stapelfeldt and T. Seideman, Rev. Mod. Phys. 75, 543 (2003)