Photodissociation of ICI at 235-248 nm

초록

Photodissociation of iodine monochloride has been investigated at 235-248 nm by studying Doppler profiles of (2+1) resonance enhanced multiphoton ionization spectra of fragment chlorine atoms and two-photon laser induced fluorescence spectra of iodine atoms. At 235.3-237.8 nm, a measured branching ratio of [Cl*(2P<inf>1/2</inf>)]/[Cl(2P <inf>3/2</inf>)] is 0.68±0.10. At 248 nm, the [I*( 2P<inf>1/2</inf>)]/[I(2P<inf>3/2</inf>)] ratio is 0.71±0.27. From the measured Doppler profiles and the ab initio calculation, the photoprepared states leading to Cl and Cl* production are assigned to the 3Π<inf>0+</inf> (and possibly 3Σ<inf>0+</inf>-) and the 1Π <inf>1</inf> states, respectively. Nonadiabatic couplings between the potential curves have been discussed. © 1993 American Institute of Physics.