Reaction M RX and Other Reactions

A modification of the diffusion flame method is the life-time method [99, 510]. It implies that the rate constant (for instance of reaction Na + RX NaX + R) is expressed as k = Nq/Nc, where Nq stands for the number of sodium atoms entering into the reactor per second, N for the number of sodium atoms in the reactor, and c for RX concentration. The ratio N/Nq represents the mean lifetime of an atom in the reaction zone (hence the name of the method). 

A method of diffusion cloud in flow [110] will also be mentioned here. It consists in the mass spectrometric analysis of the reacting species distribution in the reaction zone. 

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