Abstract
Many high-order nonresonant multiphoton ionization (MPI) experiments are dominated by above-threshold ionization (ATI), the production of photoelectrons that have absorbed more photons than the minimum required to overcome the binding energy.1 ATI becomes particularly dominant for high laser intensities (typically 1012-1015 W/cm2). In xenon, which has been studied most extensively, MPI with Nd:YAG laser light (1.165 eV) produces electron spectra displaying a series of discrete peaks with energies up to 10 eV or more.
© 1987 Optical Society of America
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