Reactive Scattering Probed by Single Photon Ionization

R. L. Gross, X. Liu and A. G. Suits, “O(3P) versus O(1D) Reaction Dynamics with n-Pentane: A Crossed-Beam Imaging Study,” Chem. Phys. Lett. (in press July 2003).

X. Liu, R. L. Gross, G. E. Hall, J. T. Muckerman and A. G. Suits, “Imaging O(3P) + alkane reaction dynamics in crossed molecular beams: Vertical versus adiabatic H abstraction dynamics,” J. Chem. Phys. 117, 7947 (2002).

X. Liu, R. L. Gross and A. G. Suits, “Differential Cross Sections for O(3P)+alkane reactions by direct imaging,” J. Chem. Phys. 116, 5341 (2002).

M. Ahmed, D. S. Peterka and A. G. Suits, "Imaging H abstraction dynamics in crossed beams: Cl+ROH reactions,” Phys. Chem. Chem. Phys., 2, 861 (2000).

We have recently exploited the VUV excimer laser at 157nm to perform universal detection of radical products in crossed-beam reactive scattering, providing a highly sensitive probe of chemical reactions under well-defined conditions.  We have performed an extensive study of reaction dynamics in O(3P) + alkanes and Cl + alcohols systems, and we are currently pursuing work on Cl+alkanes using DC slice imaging. Results for reaction of Cl atoms with n-pentane are shown below.  The use of DC slice imaging to obtain these images allows the velocity-flux contour maps to be obtained directly in the experiment.

The translational energy and angular distributions obtained from this image are shown below.  The results show a tendency toward conservation of translational energy in all these H-L-H systems.

M. Ahmed, D. S. Peterka and A. G. Suits, "Imaging H abstraction dynamics in crossed  beams: Cl+ROH reactions,”  Phys. Chem. Chem. Phys., 2, 861 (2000).

M. Ahmed, D. S. Peterka and A. G. Suits, " H abstraction dynamics by crossed-beam velocity map imaging: C1+CH 3OH -> CH 2OH+HC1, " Chem. Phys. Lett., 317, 264 (2000).

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