Abstract
It has been shown that the fluence dependence of the fractional conversion per pulse (which is often called the reaction characteristics) of infrared multiphoton dissociation is very useful in designing and evaluating the laser isotope separation processes. It was reported in our preceding works that it was possible to obtain this reaction characteristics through the procedure we proposed. In this note, this procedure is improved for promptanalysis using both numerical expressions and approximating equations for generalized relations between the dimensionless reaction volume and the dimensionless fluence.