Double-electron above threshold ionization of helium

Jonathan Parker, L.R. Moore, Karen Cairns, Daniel Dundas, Kenneth Taylor

Research output: Contribution to journalArticlepeer-review

146 Citations (Scopus)


We present calculations of intense-field multiphoton ionization processes in helium at XUV wavelengths. The calculations are obtained from a full-dimensional integration of the two-electron time-dependent Schrödinger equation. A momentum-space analysis of the ionizing two-electron wavepacket reveals the existence of double-electron above threshold ionization (DATI). In momentum-space two distinct forms of DATI are resolved, namely non-sequential and sequential. In non-sequential DATI correlated electrons resonantly absorb and share energy in integer units of Ïlaser.
Original languageEnglish
Pages (from-to)L69-L78
Number of pages10
JournalJournal of Physics B: Atomic Molecular and Optical Physics
Issue number3
Publication statusPublished - 14 Feb 2001

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Atomic and Molecular Physics, and Optics

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