Measurement of Lifetime andFactors by Level Crossing and Optical Double Resonance in the OH and OD Free Radicals
- 1 May 1971
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 3 (5), 1557-1567
- https://doi.org/10.1103/physreva.3.1557
Abstract
The zero-field level crossing and optical double-resonance techniques have been used to measure the lifetimes and factors of several rotational substates in the excited state of the OH and OD free radicals. Optical excitation was provided by a molecular lamp and individual emission transitions were observed through a monochromator in the beam of resonantly scattered light. The measured factors are in agreement with the results expected from pure case b coupling for this state. The measured lifetimes are 660 ± 22 and 598 ± 20 nsec for OH and OD, respectively; the mean value 629 ± 22 nsec is suggested. The optical double-resonance experiments allow a tentative lower limit to be placed on the excited-state hyperfine interaction.
Keywords
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