Abstract

A detailed analysis of chemical laser experiments reveals that threshold times of grating selected lines provide a sensitive criterion for rotational nonequilibrium effects. A computer simulation model of the F + H 2 → HF + H chemical laser is used to demonstrate that threshold time measurements can yield accurate quantitative information on product rotational state distributions and rotational relaxation patterns. To obtain this information threshold times have to be measured as a function of the cavity loss factor or the initial gas mixture.

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