【Abstract】 The quenching effects of N₂, NO₂ and H₂O on the laser-induced fluorescence of I₂in a wide pressure range are reported. The quenching rates of N₂, NO₂ and H₂O are 6. 57 ×103 Pa-1, 2. 58 × 10-2 Pa-1 and 1. 50 × 10-2 Pa-l, respectively. The results imply thatdipole-induced dipole interaction plays an important role in the quenching process, and thestatic quenching of NO2 on I2 fluorescence could be attributed to the metastable complexformation of I2 and NO2更多还原