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- W1972716615 abstract "The collisional deactivation of vibrationally highly excited ethylene molecules produced in the 121.6 nm photolysis of ethyl bromide has been studied at 298 K in the presence of He, CF4, CO2 and C2H5Br as collisional partners. By observing the ratio of stabilization to decomposition (S/D) of vibrationally excited ethylene and by comparing the observed values with the theoretical curves, the average energies 〈ΔE〉down removed per collision were deduced for various collision partners. The 〈ΔE〉down for a stepladder model were found to be 6500 cm−1 for C2H5Br, 1700 cm−1 for CF4 and 1700 cm−1 for CO2. In the case of an exponential model, the 〈ΔE〉down was 700 cm−1 for He. The relative collision efficiency β was measured as a function of the total pressure of the system, and the values extrapolated to high pressure (ω → ∞) were 0.41 for He, 0.83 for CO2 and 0.83 for CF4. A scheme of energy partitioning among photofragments has also been proposed. Our results indicate that the molecular complexities of the collision partners play a role in the energy transfer by the bath gases. The present work describes a successful approach to measuring 〈ΔE〉down values for various bath gases, by studying the secondary process of the C2H5Br photodecomposition reaction at 121.6 nm." @default.
- W1972716615 created "2016-06-24" @default.
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- W1972716615 date "1988-03-01" @default.
- W1972716615 modified "2023-09-27" @default.
- W1972716615 title "Collisional deactivation of vibrationally hot ethylene produced by the photoactivation of ethyl bromide at 121.6 nm" @default.
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- W1972716615 doi "https://doi.org/10.1016/1010-6030(88)80047-9" @default.
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