[en] This paper reports experimental results on the dissociation of the NO₂ molecule into NO and O fragments under collision free conditions in bulk at three dissociation wavelengths, lambda = 351 nm, 337 nm, and 308 nm. A complete measurement and analysis of the internal energy distribution, i.e., vibrational, rotational, and electronic energy, of the NO fragment has been carried out, allowing also a conclusive deduction of the kinetic energy distribution in the center-of-mass system of both fragments, NO and O, by applying the energy conservation law to the measured internal energy distribution