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Submitted on December 21, 2000
Accepted on May 22, 2001
Strange and Unconventional Isotope Effects in Ozone Formation
Yi Qin Gao 1R. A. Marcus 1*
1 Noyes Laboratory of Chemical Physics, Mail Code 127-72, California Institute of Technology, Pasadena, CA 91125, USA.
The puzzling mass-independent isotopic enrichment in ozone formation contrasts markedly with the more recently observed large unconventional mass-dependent ratios of the individual ozone formation rate constants in certain systems. An RRKM-based theory is used to treat both effects. Restrictions of symmetry on how energy is shared among the rotational/vibrational states of the ozone isotopomer, together with an analysis of the competition between the transition states of its two exit channels, permit the calculation of isotope effects consistent with a wide array of experimental results.
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[DOI: 10.1126/science.1063648] |Summary »|Full Text »
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