We theoretically study above-threshold double ionization of helium by attosecond, intense high-order harmonic pulses. Whereas the two electrons are ejected sequentially, the ionization interval is so short that they can exchange energy.
© 2005 Optical Society of America
(020.0020) Atomic and molecular physics : Atomic and molecular physics
(020.4180) Atomic and molecular physics : Multiphoton processes
(270.0270) Quantum optics : Quantum optics
(270.6620) Quantum optics : Strong-field processes
K. L. Ishikawa and K. Midorikawa, "Above-Threshold Double Ionization of Helium with Attosecond Intense Soft X-Ray Pulses," in Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science and Photonic Applications Systems Technologies, Technical Digest (CD) (Optical Society of America, 2005), paper JThH6.
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