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- W2071291218 abstract "Following collisions of O (1D) with CO, rotationally resolved emission spectra of CO (1 ≤ v ≤ 6) in the spectral region 1800−2350 cm-1 were detected with a step-scan Fourier transform spectrometer. O (1D) was produced by photolysis of O3 with light from a KrF excimer laser at 248 nm. Upon irradiation of a flowing mixture of O3 (0.016 Torr) and CO (0.058 Torr), emission of CO (v ≤ 6) increases with time, reaches a maximum ∼10 μs. At the earliest applicable period (2−3 μs), the rotational distribution of CO is not Boltzmann; it may be approximately described with a bimodal distribution corresponding to temperatures ∼8000 and ∼500 K, with the proportion of these two components varying with the vibrational level. A short extrapolation from data in the period 2−6 μs leads to a nascent rotational temperature of ∼10170 ± 600 K for v = 1 and ∼1400 ± 40 K for v = 6, with an average rotational energy of 33 ± 6 kJ mol-1. Absorption by CO (v = 0) in the system interfered with population of low J levels of CO (v = 1). The observed vibrational distribution of (v = 2):(v = 3):(v = 4):(v = 5):(v = 6) = 1.00:0.64:0.51:0.32:0.16 corresponds to a vibrational temperature of 6850 ± 750 K. An average vibrational energy of 40 ± 4 kJ mol-1 is derived based on the observed population of CO (2 ≤ v ≤ 6) and estimates of the population of CO (v = 0, 1, and 7) by extrapolation. The observed rotational distributions of CO (1 ≤ v ≤ 3) are consistent with results of previous experiments and trajectory calculations; data for CO (4 ≤ v ≤ 6) are new." @default.
- W2071291218 created "2016-06-24" @default.
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- W2071291218 date "2006-10-18" @default.
- W2071291218 modified "2023-09-25" @default.
- W2071291218 title "Distribution of Internal States of CO from O (<sup>1</sup>D) + CO Determined with Time-Resolved Fourier Transform Spectroscopy" @default.
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- W2071291218 doi "https://doi.org/10.1021/jp0640676" @default.
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