The role of 3Π0+ in the photodissociation of BrCl at 235 nm

The photodissociation of BrCl has been investigated at 235 nm using a two-dimensional photofragment ion imaging technique. Three direct dissociation channels were observed with the quantum yields of Φ[Br(2P1/2)+Cl(2P3/2)]=0.58±0.05, Φ[Br(2P3/2)+Cl(2P1/2)]=0.16±0.05, and Φ[Br(2P3/2)+Cl(2P3/2)]=0.26±0.05, and angular distributions were represented by anisotropy parameters, β=1.98±0.05, −1.04±0.05, and 1.88±0.05, respectively. The results indicate that the 2341 3Π0+ state plays a key role in the dissociation dynamics after absorbing a photon. Based on the results of BrCl and newly found probe lines for Br atoms, the ionization probability ratios of Cl(2P3/2 or 2P1/2) to Br(2P3/2 or 2P1/2) were determined.