Answers are grounded in this paper and cite their sources.
The first known observation of a multiphoton-laser-induced inelastic collision is reported. During the collision of Ba and Tl ground-state atoms, two photons are absorbed, resulting in the simultaneous excitation of both atoms to excited states. The collisional absorption was maximized when the photon sum energy was equal to the sum energy of the excited atoms for infinite separation.
No takes yet. Share an insight, caveat, or question.
J. C. White (1981) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: