TY - JOUR
T1 - Three-photon double ionization of Ar studied by photoelectron spectroscopy using an extreme ultraviolet free-electron laser
T2 - Manifestation of resonance states of an intermediate Ar+ ion
AU - Miyauchi, N.
AU - Adachi, J.
AU - Yagishita, A.
AU - Sako, T.
AU - Koike, F.
AU - Sato, T.
AU - Iwasaki, A.
AU - Okino, T.
AU - Yamanouchi, K.
AU - Midorikawa, K.
AU - Yamakawa, K.
AU - Kannari, F.
AU - Nakano, H.
AU - Nagasono, M.
AU - Tono, K.
AU - Yabashi, M.
AU - Ishikawa, T.
AU - Togashi, T.
AU - Ohashi, H.
AU - Kimura, H.
AU - Senba, Y.
PY - 2011/4/14
Y1 - 2011/4/14
N2 - 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.
AB - 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.
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U2 - 10.1088/0953-4075/44/7/071001
DO - 10.1088/0953-4075/44/7/071001
M3 - Article
AN - SCOPUS:79953657915
SN - 0953-4075
VL - 44
JO - Journal of Physics B: Atomic, Molecular and Optical Physics
JF - Journal of Physics B: Atomic, Molecular and Optical Physics
IS - 7
M1 - 071001
ER -