Determination of the absolute two-photon ionization cross section of He by an XUV free electron laser

Takahiro Sato, Atsushi Iwasaki, Kazuki Ishibashi, Tomoya Okino, Kaoru Yamanouchi, Junichi Adachi, Akira Yagishita, Hiroki Yazawa, Fumihiko Kannari, Makoto Aoyma, Koichi Yamakawa, Katsumi Midorikawa, Hidetoshi Nakano, Makina Yabashi, Mitsuru Nagasono, Atsushi Higashiya, Tetsuya Ishikawa

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    33 Citations (Scopus)

    Abstract

    The resonant and non-resonant two-photon single ionization processes of He were investigated using intense free electron laser light in the extreme ultraviolet (XUV) region (53.4-61.4 nm) covering the 1s-2p and 1s-3p resonant transitions of He. On the basis of the dependences of the yield of He + on the XUV light-field intensity at 53.4, 58.4, 56.0 and 61.4 nm, the absolute values of the two-photon ionization cross sections of He at the four different wavelengths and their dependence on the light-field intensity were determined for the first time.

    Original languageEnglish
    Article number161001
    JournalJournal of Physics B: Atomic, Molecular and Optical Physics
    Volume44
    Issue number16
    DOIs
    Publication statusPublished - 2011 Aug 28

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics
    • Condensed Matter Physics

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  • Cite this

    Sato, T., Iwasaki, A., Ishibashi, K., Okino, T., Yamanouchi, K., Adachi, J., Yagishita, A., Yazawa, H., Kannari, F., Aoyma, M., Yamakawa, K., Midorikawa, K., Nakano, H., Yabashi, M., Nagasono, M., Higashiya, A., & Ishikawa, T. (2011). Determination of the absolute two-photon ionization cross section of He by an XUV free electron laser. Journal of Physics B: Atomic, Molecular and Optical Physics, 44(16), [161001]. https://doi.org/10.1088/0953-4075/44/16/161001