Multiphoton ionization of He by using intense high-order harmonics in the soft-x-ray region

Details Multiphoton ionization of He by using intense high-order harmonics in the soft-x-ray region Multiphoton ionization of He by using intense high-order harmonics in the soft-x-ray region

Feb 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005phrva..71b3407h&link_type=abstract

Physical Review A, vol. 71, Issue 2, id. 023407

Physics

80

Multiphoton Ionization And Excitation To Highly Excited States, Frequency Conversion, Harmonic Generation, Including Higher-Order Harmonic Generation

Scientific paper

We report on the multiphoton ionization processes in the soft-x-ray region ( λ⩽30 nm ) . On the basis of the measured time-of-flight spectra for both ions and electrons obtained using intense soft-x-ray pulses produced by high-order harmonics, the cross sections of the two-photon double ionization and above-threshold ionization of He are estimated. The high-intensity soft-x-ray radiation achieved by phase-matched high-order harmonics enables the investigation of these nonlinear optical processes, which were beyond the reach of conventional light sources.

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