Send to

Choose Destination
See comment in PubMed Commons below
Phys Rev Lett. 2004 Aug 20;93(8):083903. Epub 2004 Aug 19.

Observation of two-photon above-threshold ionization of rare gases by xuv harmonic photons.

Author information

Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8581, Japan.


We have successfully observed two-photon above-threshold ionization in rare gas atoms (Ar, Xe, and He) by the fifth harmonic (25 eV photon energy) of a KrF laser. Use of the energy-resolved photoelectron counting system together with our laser, providing strong 25 eV radiation at 40-100 Hz, enabled us to detect the very weak single-color two-photon above-threshold ionization signals. Experimental data are in good agreement with our theoretical calculations newly developed along the line of multichannel quantum defect theory.

PubMed Commons home

PubMed Commons


    Supplemental Content

    Full text links

    Icon for American Physical Society
    Loading ...
    Support Center