Abstract
The evaluation of the multidimensional canonical integrals that occur in the uniform asymptotic representations of the S matrix in the semiclassical theory of inelastic and reactive molecular collisions is considered. For the non-separable two-dimensional canonical integral considered earlier, an exact series expansion is obtained with the help of convergence factors. This method avoids the complex variable techniques used previously. The uniform asymptotic formulae derived by Miller and Marcus are discussed, and compared with the approach adopted in the present paper.
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