A combined classical/quantum study of the photodissociation dynamics of NeBr2(B) near the Br2(B) dissociation limit

Techniques of quantum and nonlinear classical mechanics are employed to study the photodissociation dynamics of NeBr2(B) near the Br2 dissociation threshold. A time-dependent treatment is used to obtain the absorption spectrum for the B←X transition. As energy increases up to 3600 cm−1, the spectrum shows a progressive congestion but narrow peaks appear again close to the Br2 dissociation limit. These peaks are associated with long lived resonances that develop nodes along the minimum energy path of the linearization. Periodic orbit (PO) analysis in two dimensions is carried out for the van der Waals NeBr2 system and POs that emerge from saddle-node bifurcations are found to be related to the structure of the above resonances.