PHOTOINDUCED CHAOS IN THE BRIGGS-RAUSCHER REACTION

Discovery of the photo-induced chaos in the Briggs-Rauscher system is reported. The chaotic oscillations were observed between the large- an d the small-amplitude simple oscillatory states existent in low and hi gh light intensity regions, respectively. Period-doubling sequence fro m the large-amplitude oscillations to the chaos was observed. Determin istic nature of the chaos was confirmed by the next-amplitude return m ap. The stretching and folding mechanism of the trajectories was revea led through the three-dimensional attractor reconstructed via the sing ular value decomposition method. The chemical origin of the photoinduc ed chaos is discussed based on the photoautocatalysis of HIO2. (C) 199 8 American Institute of Physics.