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- W2025600877 abstract "The outcome of energy transfer due to single collisions between highly vibrationally excited pyrazine (E = 37900 cm−1) and DCl is measured for the appearance of individual low-J rotational states of DCl using high-resolution transient IR absorption. Appearance profiles from double-Gaussian transient lineshapes were measured for a number of DCl states with J = 2−12. These data give information on the recoil velocity distributions, appearance rates, and populations of individual states of the scattered molecules. These data complement previous studies on high-J state DCl scattering (Li, Z.; Korobkova, E.; Werner, K.; Shum, L.; Mullin, A. S. J. Chem. Phys. 2005, 123, 174306), and together, they provide a full description of the V-RT collisions with DCl that quench pyrazine(E). Scattered DCl (v = 0) molecules with J = 2−21 are rotationally hot with Trot = 880 ± 100 K. Center-of-mass translational energy distributions are Trel ∼ 700 K for J < 15. Broader velocity distributions are observed for the J = 15−20 states. The rate constant for V-RT energy transfer is 4.6 × 10−10 cm3 molecule−1 s−1. This value is a lower limit to the overall rate constant for energy transfer and corresponds to ∼85% of the Lennard−Jones collision rate. We estimate scattering into the DCl (v = 1) state occurs in ∼1% of collisions. The energy transfer probability distribution P(ΔE) is presented and yields ⟨ΔE⟩ = 888 cm−1." @default.
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- W2025600877 date "2008-08-27" @default.
- W2025600877 modified "2023-10-18" @default.
- W2025600877 title "Dynamics of Weak and Strong Collisions: Highly Vibrationally Excited Pyrazine (<i>E</i> = 37900 cm<sup>−1</sup>) with DCl" @default.
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- W2025600877 doi "https://doi.org/10.1021/jp802421f" @default.
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