Intramolecular vibrational relaxation in a triatomic van der Waals molecule: ArCl2

Abstract

Exact quantum mechanical calculations of the vibrational predissociation of ArCl2 are reported. The results confirm the hypothesis that Δv=−2 dissociation of the B state, v′=10 level occurs by preliminary coupling to the Δv=−1 manifold followed by coupling to the Δv=−2 continuum. The intensity borrowing due to the coupling is consistent with intramolecular vibrational relaxation (IVR) in the sparse limit, ρV≤1.