Hannover 2010 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
MO: Fachverband Molekülphysik
MO 2: Collisions, Energy Transfer
MO 2.4: Vortrag
Montag, 8. März 2010, 14:45–15:00, F 142
Three Dimensional Imaging of the Charge Transfer Reaction Ar+ + N2 → Ar + N2+ — •Martin Stei1, Sebastian Trippel1, James Cox1, 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
In our group we have developed a crossed-beam imaging experiment to carry out kinematically complete studies of ion-molecule-reactions [1]. Here we report on the upgrade of our velocity map imaging spectrometer to three dimensional detection by including a time-of-flight measurement with a photomultiplier.
With this improved setup we have investigated the charge transfer reaction Ar+ + N2 → Ar + N2+. Relative cross-sections and angular distributions of N2+ in different vibrational modes have been studied as a function of collision energies between 0.3 and 2 eV. Unlike earlier investigations of this reaction [2][3], our results are in quite good agreement with recent theoretical predictions by Candori et al [4].
J. Mikosch et al., Science 319, 183 (2008)
K. Birkinshaw et al., Chem. Phys. 113, 149-158 (1987)
J. Mikosch et al., Phys. Chem. Chem. Phys. 8, 2990-2999 (2006)
R. Candori et al., J. Chem. Phys. 115, 8888-8898 (2001)