We show that photoionization cross sections of atoms can be accurately extracted from the high-order-harmonic spectra generated by intense infrared lasers only if the degree of ionization in the gas medium is small, implying that for this purpose the high-order-harmonic generation spectra should be taken at low gas pressure and at low laser intensity experimentally.
G. Wang et al., "Conditions for Extracting Photoionization Cross Sections from Laser-Induced High-Order-Harmonic Spectra," Physical Review A - Atomic, Molecular, and Optical Physics, vol. 86, no. 1, American Physical Society (APS), Jul 2012.
The definitive version is available at https://doi.org/10.1103/PhysRevA.86.015401
Keywords and Phrases
Degree Of Ionization; Gas Medium; Gas Pressures; Laser Induced; Laser Intensities; Photoionization Cross Section, Ionization Of Gases, Photoionization
International Standard Serial Number (ISSN)
Article - Journal
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