Three-photon double ionization of Ar studied by photoelectron spectroscopy using an extreme ultraviolet free-electron laser: Manifestation of resonance states of an intermediate Ar+ ion

N. Miyauchi, J. Adachi, A. Yagishita, T. Sako, F. Koike, T. Sato, A. Iwasaki, T. Okino, K. Yamanouchi, K. Midorikawa, K. Yamakawa, F. Kannari, H. Nakano, M. Nagasono, K. Tono, M. Yabashi, T. Ishikawa, T. Togashi, H. Ohashi, H. KimuraY. Senba

    研究成果: Article査読

    17 被引用数 (Scopus)

    抄録

    Three-photon double ionization of an Ar atom has been investigated by photoelectron spectroscopy using an extreme ultraviolet free-electron laser. When the photon energy of the laser has been tuned to the resonances of the intermediate Ar+ ion, photoelectron peaks due to the resonant two-photon single ionization of the Ar+ ion have been observed. And it has been revealed that the appearance of the peaks is controlled by the mixing ratios of 3p4 core-configurations of the multi-configuration states. Furthermore, it has been shown that the laser intensity dependence of the Ar2+ ion production rate due to the resonant two-photon single ionization strongly deviates from that expected by perturbation theory.

    本文言語English
    論文番号071001
    ジャーナルJournal of Physics B: Atomic, Molecular and Optical Physics
    44
    7
    DOI
    出版ステータスPublished - 2011 4 14

    ASJC Scopus subject areas

    • 原子分子物理学および光学
    • 凝縮系物理学

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