ASPIN: An all spin scattering code for atom-molecule rovibrationally inelastic cross sections

We present in this work a new computational code for the quantum calculation of integral cross sections for atom-molecule (linear) scattering processes. The atom is taken to be structurelss while the molecule call be in its singlet, doublet, or triplet Spin states and call be treated as either a rigid rotor or a rovibrational target. All the relevant state-to-state integral cross sections, and their SUMS over final states, can be Calculated with the present code. for which we also describe in detail the various component routines.