The Houston Research Group Completed Projects Home > Research > Completed Projects > Ozone Home    Research    Education    People

Paul Houston Current Research Photodissociation Dynamics Betaofnu Bimolecular Reactions Imaging Biofilms Completed Projects Ozone OLEDs 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 >

Ozone Photodissociation Ozone is an important constituent of the Earth's atmosphere. We have studied its photodissociation in the ultraviolet Hartley Band using product imaging. A new channel producing highly vibrationally excited O2 has been discovered. The image above shows rings corresponding to O2(1Delta) vibrational levels v = 0,1,2,3 produced in coincidence with O(1D) A slide show on basic information about stratospheric ozone is available. A. G. Suits, R. L. Miller, L. S. Bontuyan, and P. L. Houston, "Photofragment Vector Correlations by Ion Imaging: O2(a 1DELTAg v, J) from 248 nm Dissociation of Ozone," J. Chem. Soc. Farad. Trans. II 89, 1443-1447 (1993). R. L. Miller, A. G. Suits, P. L. Houston, R. Toumi, J. A. Mack, and A. M. Wodtke, "The 'Ozone Deficit' Problem: Observation of an O2(X v>=26) + O(3P) Channel in the 226-nm Photodissociation of Ozone," Science 265, 1831-1838 (1994). The text and figures are available as gif files (each about 100kb): Page 1 / Page 2 / Page 3 / Page 4 / Page 5 / Page 6 / Page 7 / Page 8 Alternatively, download a copy from JSTOR R. Toumi, P. L. Houston, and A. M. Wodtke, "Reactive O2(v>=26) as a source of stratospheric O3", J. Chem. Phys, J. Chem. Phys. 104, 775-776 (1996). P. L. Houston, A. G. Suits, and R. Toumi, "Isotopic Enrichment of Heavy Ozone in the Stratosphere," J. Geophysical Res. 101 (D13) 18829-18834 (1996).pdf format R. J. Wilson, J. A. Mueller, and P. L. Houston, "Speed-Dependent Anisotropy Parameters in the UV Photodissociation of Ozone," J. Phys. Chem. 101, 7593-7599 (1997), pdf format N. Taniguchi, K. Takahashi, Y. Matsumi, S. Dylewski, J. Geiser, and P. L Houston, "Determination of the heat of formation of O3 using vacuum ultraviolet laser-induced fluorescence spectroscopy and two-dimensional product imaging techniques," J. Chem. Phys. 111. 6350- 6355 (1999), pdf format J. D. Geiser, S. M. Dylewski, J. A. Mueller, R. J. Wilson, P. L. Houston, and R. Toumi, "The Vibrational Distribution of O2(X 3Sigmag ) produced in the Photodissociation of Ozone between 226 and 240 and at 266 nm," J. Chem. Phys. 112, 1279-1286 (2000) 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. S. M. Dylewski, J. D. Geiser, and P. L. Houston, "The energy distribution, angular distribution, and alignment of the O(1D2) fragment from the photodissociation of ozone between 235 and 305 nm," J. Chem. Phys. 115, 7460-7473 (2001). pdf format P. L. Houston, "Photodissociation Dynamics of Ozone in the Hartley Band," in "Advanced Series in Physical Chemistry", "Modern Trends in Chemical Reaction Dynamics," in "Modern Trends in Chemical Reaction Dynamics," X. Yang and K. Liu, editors, Volume 14, Part II (World Scientific Co., Singapore, 2004) (Request reprint) This work was supported by The Chemistry Division of the National Science Foundation and by the Research Institute of Innovative Technology for the Earth administered by the New Energy and Industrial Technology Development Organization of Japan.