Observation of the intermediate states in the (Xe-Cl2)*→ XeCl* (B,C) + Cl reaction

Abstract The Xe-Cl 2 van der Waals complex formed in a supersonic expansion is excited in a two-photon process. The XeCl(B,C) reaction spectra (excitation of the complex and detection of the XeCl (B→X) and (C→A) fluorescence) are obtained in the region 290–310 nm. In addition to a diffuse band also obtained in the C action spectrum, the B action spectrum presents a vibronic structure similar to the Xe-Cl (B←X) absorption band. Xe-Cl 2 ( 1 Π u ) resonantly enhanced two-photon process with two chromophores is proposed to account for the results.