Deactivation of I(52P1/2) by chemical reaction with HBr and DBr
- 15 July 1977
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 67 (2), 509-516
- https://doi.org/10.1063/1.434906
Abstract
The collisional deactivation of electronically excited iodine atoms, I (5P1/2), by CH4, C3H8, HBr, and DBr has been investigated using time‐resolved atomic resonance spectroscopy. This technique permits direct determination of the yield of I (5 2P3/2) following the deactivation of the excited atoms by the added gas. The experiment demonstrated that the deactivation of I (5 2P1/2) by CH4 and C3H8 proceeds by physical quenching, but deactivation by HBr and DBr occurs via metathetical chemical reaction to form HI+Br(4 2P3/2). This nonadiabatic reaction is discussed in the context of a curve‐crossing model involving vibrationally excited virtual states of the deactivating molecule.Keywords
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