37 research outputs found
Interference effects in two-photon ATI by multiple orders high harmonics with random or locked phases
Full text linkWe numerically study 2-photon processes using a set of harmonics from a
Ti:Sapphire laser and in particular interference effects in the Above Threshold
Ionization spectra. We compare the situation where the harmonic phases are
assumed locked to the case where they have a random distribution. Suggestions
for possible experiments, using realistic parameters are discussed.Comment: 11 pages, 13 figures, LaTe
Determination of radiative lifetimes of neutral bismuth by time-resolved uv-vuv laser spectroscopy
Full text linkExperimental studies of selected LS-allowed and LS-forbidden transitions of neutral sulfur from the infrared part of the spectrum
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Blivande ridlärares uppfattningar av vad som karaktäriserar deras kroppsmedvetande i ridningen.
No full textTwo-colour time-resolved spectroscopy of helium using high-order harmonics
No full textThe 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
