Strong dependence of ir multiphoton absorption and dissociation yield of SF6 molecule on intensity (duration) of exciting laser pulse

The role of played by the intensity of the exciting TEA CO₂ laser pulses in the processes of ir multiphoton absorption (MPA) of SF₆ molecules cooled toT _R?40 K andT _v?160 K in a pulsed supersonic jet and the dissociation of SF₆ in a bulk atT?300 K under essentially collisionless conditions have been investigated. A strong dependence of MPA and the dissociation yield on pulse intensity were observed. The frequency dependences of the intensity effects were studied.