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High-precision intensity-selective observation of multiphoton ionization: a new method of photoelectron spectroscopy

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Abstract

We have developed a novel method of time-of-flight (TOF) photoelectron spectroscopy that permits observation of multiphoton ionizations with extremely high precision, especially for low-probability events. By scanning the laser-produced ionization region across a pinhole we can select specific laser peak intensities. The volumes occupied by low intensities rise rapidly compared with traditional straight TOF spectroscopy, resulting in high signal gains. This technique presents a new way of observing fundamental laser–matter interactions.

© 1996 Optical Society of America

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