Predissociation of Bi2 A(0u+), v'=21-39.

Collisionless lifetimes for Bi2 A(0u+), v'=20-39, J'X) spectrum required both traditional lifetime measurements and synthetic spectrum fits to laser excitation spectra to determine the full range of observed rates. A single, repulsive potential responsible for the observed A-state predissociation could not be identified to adequately describe the vibrational dependence of the predissociation rates.