Two-colour time-resolved spectroscopy of helium using high-order harmonics
- 14 February 1995
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic, Molecular and Optical Physics
- Vol. 28 (3) , L53-L58
- https://doi.org/10.1088/0953-4075/28/3/003
Abstract
The radiative lifetime of the 1s2p1P state of helium is measured in a two-colour ionization experiment with a 5% accuracy. The state is excited by the 13th harmonic of a tunable 80 ps laser and ionized by a synchronous ultraviolet laser, with a variable time delay. This experiment demonstrates that the high harmonics generated in a jet of rare gas exposed to an intense laser field provide a tunable short-pulse XUV source ideally suited for pump/probe type of studies and, in particular, short lifetime measurements.Keywords
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