TY - JOUR
T1 - Determination of the absolute two-photon ionization cross section of He by an XUV free electron laser
AU - Sato, Takahiro
AU - Iwasaki, Atsushi
AU - Ishibashi, Kazuki
AU - Okino, Tomoya
AU - Yamanouchi, Kaoru
AU - Adachi, Junichi
AU - Yagishita, Akira
AU - Yazawa, Hiroki
AU - Kannari, Fumihiko
AU - Aoyma, Makoto
AU - Yamakawa, Koichi
AU - Midorikawa, Katsumi
AU - Nakano, Hidetoshi
AU - Yabashi, Makina
AU - Nagasono, Mitsuru
AU - Higashiya, Atsushi
AU - Ishikawa, Tetsuya
PY - 2011/8/28
Y1 - 2011/8/28
N2 - 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.
AB - 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.
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U2 - 10.1088/0953-4075/44/16/161001
DO - 10.1088/0953-4075/44/16/161001
M3 - Article
AN - SCOPUS:80051761835
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 - 16
M1 - 161001
ER -