Isotope effects in the deactivation of O(1D) atoms by XCl and XF (X=H,D)

The method of time-resolved laser magnetic resonance (LMR) was used to study the deactivation of O(1D) by HCl, DCl, HF, and DF at room temperature. For O(1D)+XF(X=H, D), the effect of deuteration on the rates of physical quenching and chemical reaction was negligible. For O(1D)+XCl, no essential isotope effect on the deactivation rate, on the Cl+OX reaction channel probability, and on the relative quantum yields of spin–orbit excited Cl(2P1/2) atoms was found. While the formation of H+ClO is found to account for 0.18±0.04 of the deactivation rate, in the deuterated case this channel was negligible (<0.03).