Quantum theory of recollisional (e, 2e) process in strong field nonsequential double ionization of helium
ORAL
Abstract
Based on the full quantal recollision model and field-free electron impact ionization theory, we calculated the momentum correlation spectra of the two outgoing electrons in strong field nonsequential double ionization (NSDI) of helium to compare with recent experiments. By analyzing the relative strength of binary vs recoil collisions exhibited in the photoelectron spectra, we confirmed that the observed finger- like structure in the correlation spectra is a consequence of Coulomb interaction between the two emitted electrons. Our result supports the recollision mechanism of strong field NSDI at the most fundamental level.
*This work was supported in part by Chemical Sciences, Geosciences and Biosciences Division, Office of Basic Energy Sciences, Office of Science, US Department of Energy. Y Liang was also supported by financial aids from China Scholarship Council.
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