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We present a detailed description of a FORTRAN code for evaluation of theresonance contribution a Regge trajectory makes to the integral state-to-statecross section (ICS) within a specified range of energies. The contribution isevaluated with the help of the Mulholland formula [Macek et al (2004)] and itsvariants [Sokolovski et al (2007); Sokolovski and Akhmatskaya (2011)]. Reggepole positions and residues are obtained by analytically continuing S-matrixelement, evaluated numerically for the physical values of the total angularmomentum, into the complex angular momentum plane using the PADE II program[Sokolovski et al (2011)]. The code decomposes an elastic, inelastic, orreactive ICS into a structured, resonance, and a smooth, "direct", components,and attributes observed resonance structure to resonance Regge trajectories.The package has been successfully tested on several models, as well as the F +H2->HF+H benchmark reaction. Several detailed examples are given in the text.

Numerical Regge pole analysis of resonance structures in elastic, inelastic and reactive state-to-state integral cross sections