Files in this item
Files | Description | Format |
---|---|---|
application/pdf ![]() | Presentation | |
application/pdf ![]() | Abstract |
Description
Title: | EFFICIENT SUPER ENERGY TRANSFER COLLISIONS THROUGH REACTIVE-COMPLEX FORMATION: H + SO2 |
Author(s): | Smith, Jonathan M. |
Contributor(s): | Dai, HAI-LUNG; Ma, Jianqiang; Wilhelm, Michael J. |
Subject(s): | Dynamics/Kinetics/Ultrafast |
Abstract: | Translational-to-vibrational energy transfer (ET) from a hyperthermal H atom to ambient SO$_{2}$ was characterized using time-resolved Fourier transform infrared emission spectroscopy. Vibrational excitation of SO$_{2}$, following collisions with H atoms containing 59 kcal/mol of kinetic energy, generated from the 193 nm photolysis of HBr, is detected in two distinct energy distributions: one with excitation predominantly at the fundamental vibrational levels is attributable to classical impulsive collisions, while the other, accounting for 80% of the excited SO$_{2}$ with vibrational energy as high as 14,000 wn, is proposed to arise from the formation of a transient reactive-complex during the collision. The cross-section for this super ET collision is determined to be 0.53$pm$0.05 AA$^{2}$, or roughly 2% of all hard sphere collisions. This observation reveals that in collisions between a hyperthermal atom and an ambient molecule, for which a reactive-complex exists on the potential energy surface, a large quantity of translational energy can be transferred to the molecule with high efficiency. |
Issue Date: | 23-Jun-15 |
Publisher: | International Symposium on Molecular Spectroscopy |
Citation Info: | ACS |
Genre: | Conference Paper / Presentation |
Type: | Text |
Language: | English |
URI: | http://hdl.handle.net/2142/79400 |
Date Available in IDEALS: | 2016-01-05 |