ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
The fluorescence intensity ratios of O37ClO/O35ClO excited to the A˜ 2A2 state have been found to be much larger than that expected from the 37Cl/35Cl natural abundance ratio for several low-energy vibrational levels. For instance, the O37ClO/O35ClO ratios are 1.67 and 〉10 for the (0,0,0) and (1,1,0) bands, respectively, which are 5 and 30 times larger than those expected from the natural abundance ratio. These unusual isotope effects are observed in a narrow energy region within ∼1000 cm−1 above the electronic origin. It is likely that the isotopomer-selective, near-resonant spin-orbit coupling of the low-energy vibrational levels of the 2A2 state with those of the 2A1 state, which provides a decay channel for the 2A2 state via spin-orbit coupling, is responsible for the unusual isotope effect. © 1999 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.479325
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