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- W1559908088 abstract "The rate constant for quenching of I(P21/2) by O(P3) has been measured for the temperature range 295–360 K. Pulsed laser photolysis of mixtures N2O and I2 was used to examine the kinetics. O(P3) atoms were produced by the photoinitiated reaction sequences N2O+hν→O(D1)+N2 and O(D1)+M→O(P3)+M, while singlet oxygen was generated by the secondary reaction O(D1)+N2O→O2(a 1Δ)+N2. Iodine atoms were produced by I2 photodissociation and from the secondary reactions of I2 with O(P3) atoms. Subsequent excitation of I by O2(a Δ1) led to I(P21/2) formation, with I(P21/2) concentrations monitored using time-resolved 1315 nm emission. The rate constant of the quenching process was determined by fitting a kinetic model to the observed emission traces. Special attention was given to the gas flow conditions. A modest temperature dependence of the quenching rate constant was found, and this was well represented by the equation k=(6.5±1)×10−12(T/300)1.76 cm3 s−1. The room temperature rate constant differs from previous experimental determinations but agrees well with the value determined by modeling of the data from discharge driven oxygen-iodine lasers." @default.
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- W1559908088 date "2009-05-01" @default.
- W1559908088 modified "2023-09-27" @default.
- W1559908088 title "Temperature dependence of the O+I(P21/2)→O+I(P23/2) quenching rate constant" @default.
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- W1559908088 doi "https://doi.org/10.1063/1.3125455" @default.
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