Abstract

Two-photon Raman excitation is used to populate selectively vibrational states in CO₂ and SF₆. The collisional population of 01¹0, 02²0, 03¹0, 11¹0, etc. by means of 10⁰0 and 02⁰0 states in CO₂ gas is studied by coherent anti-Stokes Raman spectroscopy. No population transfer is observed between Fermi-resonant CO₂(10⁰0) and CO₂(02⁰0) states with the rate constant K ≳ 7 10⁴ sec⁻¹ Torr⁻¹. The lifetime of the SF₆(100000) state is found to be τρ ≳ 15 μsec Torr.

© 1983 Optical Society of America

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