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Observation of laser-assisted Auger decay in argon

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We investigated the effect of an intense dressing field on the energies of electrons ejected in an Auger process by means of electron spectroscopy. An amplified Ti:S laser provides infrared (800 nm) pulses of 40 mJ ranging from 150 femtoseconds to 8 picoseconds.[1] Part of the infrared beam is focused onto a liquid metal (gallium) target to produce broadband X-radiation. Auger electrons resulting from the X-induced LMM transition in argon[2] are detected in a time-of-flight electron spectrometer. When the X-ray beam and the infrared dressing beam overlap in space and time, sidebands appear around the Auger peaks, corresponding to absorption or emission of photons from the dressing field.

© 1994 Optical Society of America

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