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Chinese Physics Letters

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

Yongfang Li, Zhang Yinke, Li Fu'an, Xiangsheng Li, FU KE-DE

Published Jan 1, 1992• 0 citations
Publisher

Abstract

We report diffuse bands stimulated emission of Li 2 in the 488 ∼ 522 nm region, produced by two-photon resonance excited Li (4 s ) states transferring energy to Li 2 high triplet states via collision in Li-Li 2 system. The diffuse bands could be assigned to triplet bound-free (2 3 Σ g + -a 3 Σ u + ) transitions. The mechanisms for producing and emission of the diffuse bands are discussed.

DOI
10.1088/0256-307x/9/1/005

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We report diffuse bands stimulated emission of Li 2 in the 488 ∼ 522 nm region, produced by two-photon resonance excited Li (4 s ) states transferring energy to Li 2 high triplet states via collision in Li-Li 2 system. The diffuse bands could be assigned to triplet bound-free (2 3 Σ g + -a 3 Σ u + ) transitions. The mechanisms for producing and emission of the diffuse bands are discussed.
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We performed quasiresonant laser excitation of Li–Cd vapor mixtures at 460.3 nm (2p–4d) and 497.2 nm (2p–4s). The initial population of the Li(2p) level is caused by three processes: collisional dissociation or photodissociation of the Li 2 (B 1 Π u ) molecules or energy transfer in Li 2 (B 1 Π u ) and Li(2s) collisions. The Li(4d,4s) atoms radiatively decay towards Li(3p), from which collisional population transfer to Cd(5 3 P J ) occurs, followed by three-body reactive collisions which produce the LiCd(2 2 Π ) excimer states