Abstract

The V-T relaxation time for the laser-excited v₆ + v₁₀ combination band in C₂F₅Cl at 1066 K is directly measured by using picosecond CO₂ laser pulses. The lack of measurable absorption of the picosecond pulse in unexcited molecules (at 944.2 cm−¹) enables the unambiguous measurement of the V-T relaxation time of an ensemble of specifically prepared vibrationally hot molecules.

© 1991 Optical Society of America