Two-colour laser-induced grating spectroscopy of iodine vapour

✍ Scribed by M.D. Wheeler; I.R. Lambert; M.N.R. Ashfold

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 360 KB
• Volume: 211
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(93)87077-g

✦ Synopsis

The technique of twmlour laser-induced grating spectroscopy (LIGS) is used to obtain folded double-resonance spectra of the I2 B 'Il& tX 'C: system. The laser grating is produced with the second harmonic output of a Nd: YAG laser at 532.05 nm, and results in the population of three rovibronic levels of the B 311,$ excited state. The probe laser wavelength is tuned in the range 555.5-566.5 nm, and transitions are observed from the optically pumped levels to internally hot (v"=4, 5) levels of the ground electronic state. The spectroscopic information derived mimics that which can be obtained from stimulated emission pumping, however two-eolour LIGS possesses the advantage that it is an essentially background-free technique.