Abstract
Using Doppler-resolved transient frequency modulation absorption spectroscopy, we have measured both alignment and orientation quantum beats arising from nuclear hyperfine depolarization of low rotational levels of CN X 2Σ+ photofragments produced in the ultraviolet photodissociation of ICN. Under our conditions of fully resolved fine-structure and completely unresolved hyperfine structure, the observed time evolution is insensitive to the rapid depolarization of angular momentum N that would be observed if the fine-structure components were not resolved. Non-statistical spin-rotation populations of CN photofragments, previously observed only for high rotational states, are now observed even for the lowest rotational states, indicating that the electron can not be considered a spectator spin in the depolarization.
Original language | English |
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Pages (from-to) | 1408-1413 |
Number of pages | 6 |
Journal | Physical Chemistry Chemical Physics |
Volume | 7 |
Issue number | 7 |
DOIs | |
Publication status | Published - 2005 |
ASJC Scopus subject areas
- General Physics and Astronomy
- Physical and Theoretical Chemistry