Abstract
A collision kernel for the Waldmann–Snider collision operator has been derived for a rigid rotor in a monatomic heat bath. The general form of the collision kernel is reduced to a classical Boltzmann form when the rotor is restricted to the ground rotational state. A similar form for the collision kernel is obtained with the use of the spherical approximation for the scattering matrix and by considering only elastic collisions. In addition, an outline of how this may be applied to line shape calculations is given for arbitrary gas pressures.
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