Abstract
The open channels of the room temperature 0+CS2 reaction have been identified by studying this reaction in high-intensity undiscriminated crossed molecular beams using photoionization mass spectrometry to detect the products. Three open channels have been identified: O + CS2 → CS + SO (1); O + CS2 → OCS + S (2); and O + CS2 → CO + S2 (3). The overall rate constant (k) of the O + CS2 reaction as well as the branching ratio (k2/k) for Channel (2) were measured at 302°K using a fast-flow reactor. They are k=4.0×10−12 cm3 p−1 sec−1, and k2/k=0.093. Speculation on the branching ratios for Channels (1) and (3) are offered based on the results of the crossed beam experiments. The possible roles of OCS production by Channel (2) and CO production by Channel (3) in the performance of the O+CS2 chemical laser are mentioned.
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