Ultraviolet absorption cross sections of chlorine oxide (Cl2O2) between 210 and 410 nm

摘要: The ultraviolet and infrared absorption cross sections of Cl{sub 2}O{sub 2} have been measured. transient molecule was produced by using the gas-phase reaction ClO + M {yields} M. Three independent radical source reactions were used in this study: Cl O{sub 3}, 2}O, OClO. UV spectrum recorded over range 200-450 nm with a diode array spectrometer temperature 205-250 K. high-resolution Fourier transform 500-2,000 cm{sup {minus}1}. Both spectrometers optically coupled to fast flow multipass cell. is structureless continuum peak at 245 nm. measurable extends out 410 section spectrum, nm, measured be (6.5{sub {minus}0.5}{sup +0.8}) {times} 10{sup {minus}18} 2}. Infrared features centered 560, 653, 750 {minus}1} assigned molecule. present results are compared other reported andmore » IR measurements sources discrepancies discussed. role atmospheric chemistry particular Antarctic ozone hole discussed.« less