QUANTUM-TUNNELING VERSUS THERMALLY ACTIVATED ELECTRON-TRANSFER IN OHMIC AND NONOHMIC HEAT BATHS

dependence of electron transfer rates on temperatures and energy gaps is investigated using more realistic spectral density for solvent fluc tuation, such as ohmic, sub-ohmic, super-ohmic dissipation, and the De bye models. We will systematically examine the entire range of tempera ture and energy-gap dependence, covering the quantum-tunneling regime, the classical Marcus regime, and the intermediate crossover regime. ( C) 1997 American Institute of Physics.