Shakeup excitation during optical tunnel ionization
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Legare, F
Dooley, PW
Villeneuve, DM
Corkum, PB
Zanghellini, J
Pegarkov, A
Fabian, C
Brabec, T
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Abstract
Shakeup of a two-electron system is investigated in the strong infrared laser field limit, both theoretically and experimentally. During tunnel ionization the electron shakes up a second electron to an excited bound state. Theoretically, a complete analytical theory of shakeup in intense laser fields is developed. We predict that shakeup produces one excited sigma(u) D-2(+) state in approximate to10(5) ionization events. Shakeup is measured experimentally by using the molecular clock provided by the internuclear motion. The number of measured events is found to be in excellent agreement with theory.
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Physical Review Letters
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94
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3
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Mathematical sciences
Physical sciences
Atomic and molecular physics
Engineering