A fully quantum mechanical dynamical calculation on the photodissociation of molecular chlorine is presented. The magnitudes and phases of all the relevant photofragment T-matrices have been calculated, making this study the computational equivalent of a “complete experiment,” where all the possible parameters defining an experiment have been determined. The results are used to simulate cross-sections and angular momentumpolarization information which may be compared with experimental data. The calculations rigorously confirm the currently accepted mechanism for the UV photodissociation of Cl₂, in which the majority of the products exit on the C ¹Π_1u state, with non-adiabatic couplings to the A ³Π_1u and several other Ω = 1 states, and a small contribution from the B³Π state present at longer wavelengths.