MULTIPLE EXCITATIONS AND REACTION YIELDS IN PHOTOSYNTHETIC SYSTEMS

Alternative explanations of the limited yield of product when bacterial reaction centers are excited by intense ps pulses (Moskowitz and Malley, Photochem. Photohiol. 27 55, 1978) are given. These alternatives, based on photoreversal or multitrap effects, can be experimentally distinguished by a predicted wavelength variation or by the effect of a second flash.