Ultracold collisions between Rb and excited NH*

Rb--NH is a system of both fundamental and current experimental interest. We investigate the prospect of collisional processes between the Rb (5p) + NH $\left(\rm{X}~^{3}\Sigma^{-}\right)$ and Rb (5s) + NH $\left(^{1}\Delta\right)$ states in the Rb--NH system. The inelastic collision processes inherently involve more than one Born-Oppenheimer potential surface, which is of general interest in the study of atomic and molecular collisions.