โ Scribed by Todd Van Marter; Michael C. Heaven; David Plummer
No coin nor oath required. For personal study only.
Electronic energy transfer between I atoms and 02 molecules, O2(a 1A) + I(2P3/2) 4-~ O2(X 3Y'. -) + I(2P1/2 ), is a process of central importance in chemical oxygen-iodine laser (COIL) systems. Rate constants for the forward and reverse steps are well defined for room temperature. However, supersonic COIL devices operate with local gas temperatures near 150 K. To facilitate modeling of these lasers, the rate constant for quenching of I(2pl/2) by O2(X) has been measured at a temperature of 150 K. The result obtained, k b = (4.6 +_ 1.0)ร 10 -12 cm 3 s-l, is appreciably smaller than the values used in current computational models.
๐ SIMILAR VOLUMES
Absolute rate constants for the quenching of metastable 02@lCi) by acetylene. ethylene. propylene. butene-1, tmns-butene-2, cis-butene-2, and tetramethylethylene were determined at 300%. The rate constants range from 4 to 10 X 10 -13cm3molecule-lsec-I, and exhibit a systematic variation with molecu
The bimolecular reactions in the title were measured behind shock waves by monitoring the 0-atom production in COS-02-Ar and CS2-02-Ar mixtures over the temperature range between 1400 and 2200 K. A value of the rate constant for S + O2 -+ SO f 0 was evaluated to be (3.8 2 0.7) x 10" cm3 mol-' s-' be
Absolute rate constants for the reaction of O(3P) atoms with CHI = CHF, CH2 = CHC1, and CH2 = CHBr have been obtained at 298 f 2ยฐK using a modulation phase shift technique. The rate constants ( k z X lo-\* l./mole.sec) obtained are: CH2 = CHF (1.61 =t 0.20), CH2 = CHCl (2.54 + 0.26), and CHZ = CHBr