A rational approximation for the Dawson's integral of real argument
Abstract
We present a rational approximation for the Dawson's integral of real argument and show how it can be implemented for accurate and rapid computation of the Voigt function at small y < < 1. The algorithm based on this approach enables computation with accuracy exceeding 10 - 10 within the domain 0 x 15 and 0 y 10 - 6. Due to rapid performance the proposed rational approximation runs the algorithm without deceleration.
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