Generation of Diffuse Bands Stimulated Emission in 488~522 nm Region in Lithium Dimer

We report diffuse bands stimulated emission of Li₂ in the 488~522 nm region, produced by two-photon resonance excited Li (4s) states transferring energy to Li₂ high triplet states via collision in Li- Li₂ system. The diffuse bands could be assigned to triplet bound-free (2³ Σ⁺_g -a³Σ⁺_u ) transitions. The mechanisms for producing and emission of the diffuse bands are discussed.