Two-colour time-resolved spectroscopy of helium using high-order harmonics
Summary, in English
The radiative lifetime of the ls2p1P 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 SO 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.
- Department of Physics
Journal of Physics B: Atomic, Molecular and Optical Physics
- Atom and Molecular Physics and Optics
- ISSN: 0953-4075