Abstract
We present calculations on H2+ three-photon ionization by a short vuv/fs 1012 W/cm2 laser pulse [1]. For pulse durations exceeding 10 fs, a modulation due to interference in dissociative channels is found in the KER spectrum. The fs pulse launches two wave packets (WPs) on the 2pσu and 3dσg potential surfaces, respectively. The WPs then propagate for some time before they are superposed by the field at a later time, inducing constructive or destructive interferences in the wave function. Eventually, the vuv field ionizes the molecule and an image of the modulated wave packet is reflected in the ionization spectrum.
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