Two-colour time-resolved spectroscopy of helium using high-order harmonics

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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.


Enheter & grupper
Externa organisationer
  • Lund University
  • Saclay Nuclear Research Centre

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Atom- och molekylfysik och optik
Sidor (från-till)L53-L58
TidskriftJournal of Physics B: Atomic, Molecular and Optical Physics
Utgåva nummer3
StatusPublished - 1995 feb 14
Peer review utfördJa