[en] Infrared fluorescence from the sensitized reaction in SF₆-UF₆-H₂ system induced by 10.6 μm P(24) line of a pulsed CO₂ laser is investigated. The time resolved IR fluorescence of vibrationally excited HF* is measured with an InSb photovoltic detector and is compared with that from the SF₆--H₂ system under similar experimental conditions. Our results show a linear dependence of fluorescence intensity with laser energy density. The time resolved IR fluorescence of HF* is dependent on the partial pressure of UF₆. The fluorescence intensity obeys the single exponential decay at lower P/sub =/, but non-single exponential decay is observed at higher P/sub =/. The time dependence of the HF* fluorescence intensity is explained with the infrared photo-sensitized reaction mechanism of the SF₆-UF₆-H₂ system