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Paul Houston Current Research Photodissociation Dynamics Betaofnu Bimolecular Reactions Imaging Biofilms Completed Projects Ozone OLEDs Vector Correlations HCO Energy Transfer at Solid Surfaces E-to-V ET H abstraction Isotope Separation Complete List of Publications Information for Prospective Graduate Students and Postdocs

Development of Product Imaging A key experimental technique that enables studies of photodissociaiton dynamics and bimolecular collisions is product imaging. Since its inception in 1987, our group has actively pursued the development of this technique. A description of the technique is provided in Wikipedia. The figure above compares Velocity Mapped Imaging (top row) with Velocity Mapped Imaging with Discrimination and Centroiding (bottom row). The figure at right shows the original CH3I image. D. W. Chandler and P. L. Houston, "Velocity and Internal State Distributions by Two-Dimensional Imaging of Products Detected by Multiphoton Ionization," J. Chem. Phys. 87, 1445-1447 (1987). pdf format R. Ogorzalek, G. E. Hall, H.-P. Haerri, and P. L. Houston, "State-Resolved Velocity Distributions by Pulsed Extraction Time-of-flight Mass Spectrometry," J. Phys. Chem. 92, 5-8 (1988). pdf format P. L. Houston, "Snapshots of Chemistry; Prodcut Imaging of Molecular Reactions," Accounts of Chemical Research, 28, 453-460 (1995). pdf format T. Suzuki, V. P. Hradil, S. A. Hewitt, P. L. Houston and B. J. Whitaker, "Two- dimensional Imaging of State-selected Photofragments: The 355 nm Photolysis of NO2," Chem. Phys. Lett. 187, 257-262 (1991). P. L. Houston, "New Laser-Based and Imaging Methods for Studying the Dynamics of Molecular Collisions," J. Phys. Chem. 100, 12757-12770 (1996). pdf format B.-Y. Chang, R. C. Hoetzlein, J. A. Mueller, J. D. Geiser, and P. L. Houston, "Improved 2D Product Imaging: The Real-Time Ion-Counting Method," Rev. Sci. Instrum. 69, 1665-1670 (1998) pdf format J. D. Geiser, S. M. Dylewski, J. A. Mueller, R. J. Wilson, B.-Y. Chang, R. C. Hoetzlein, and P. L. Houston, "Improvements to the Product Imaging Technique and their Application to Ozone Photodissociation," in Imaging in Chemical Dynamics,, A. G. Suits and R. E. Continetti, eds., ACS Symposium Series, (American Chemical Society, Washington DC, 2000). (Request reprint)   A slide show of this paper is available. P. L. Houston, B. R. Cosofret, A. Dixit, S. M. Dylewski, J. D. Geiser, J. A. Mueller, R. J. Wilson, P. J. Pisano, M. S. Westley, K. T. Lorenz, and D. W. Chandler, "Product Imaging Studies of Photodissociation and Bimolecular Reaction Dynamics," J. Chinese Chem. Soc., 48, 309-318 (2001).pdf format P. L. Houston, "Charged Particle Imaging in Chemical Dynamics: An Historical Perspective," in Imaging in Molecular Dynamics: Technology and Applications, B. Whitaker, ed. (Cambridge University Press, 2003). (Request reprint) This work is supported by the Department of Energy.