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Internal Energy Distributions of OH Products in the Reaction of O(3PJ) with HSiCl3
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  • Internal Energy Distributions of OH Products in the Reaction of O(3PJ) with HSiCl3
저자명
Kwak. Hyon-Tae,Ha. Seung-Chul,Jang. Sung-Woo,Kim. Hong-Lae,Park. Chan-Ryang
간행물명
Bulletin of the Korean Chemical Society
권/호정보
2009년|30권 2호|pp.429-434 (6 pages)
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

The OH($X^2{Pi},;{ u}$"=0, 1) internal state distributions from the reaction of electronically ground state oxygen atoms with HSi$Cl_3$ were measured using laser-induced fluorescence. The ground-state O$(^3P_J)$ atoms with kinetic energies above the reaction barrier were produced by photolysis of N$O_2$ at 355 nm. The OH product revealed strong vibrational population inversion, P(${ u}$"=1)/P(${ u}$"=0) = 4.0 ${pm}$ 0.6, and rotational distributions in both vibrational states exhibit substantial rotational excitations to the limit of total available energy. However, no preferential populations in either of the two $Lambda$ doublet states were observed from the micropopulations, which supports a mechanism involving a direct abstraction of hydrogen by the atomic oxygen. It was also found that the collision energy between O and HSi$Cl_3$ is effectively coupled into the excitation of the internal degrees of freedom of the OH product ($$ = 0.62, and $<;f_{rot}>$ = 0.20). The dynamics appear consistent with expectations for the kinematically constrained reaction which supports the reaction type, heavy + light-heavy $ ightarrow$ heavy-light + heavy (H + LH′ $ ightarrow$ HL + H′). The dynamics of oxygen atom collision with HSi$Cl_3$ are discussed in comparison to those with Si$H_4$.